Merge pull request #1883 from Kobzol/pull

Rustc pull update

681 files changed, 15170 insertions, 8218 deletions

diff --git a/src/bootstrap/Cargo.lock b/src/bootstrap/Cargo.lock
index 2434a278d55..e091c94eb53 100644
--- a/src/bootstrap/Cargo.lock
+++ b/src/bootstrap/Cargo.lock
@@ -386,9 +386,9 @@ checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
 
 [[package]]
 name = "libc"
-version = "0.2.172"
+version = "0.2.174"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d750af042f7ef4f724306de029d18836c26c1765a54a6a3f094cbd23a7267ffa"
+checksum = "1171693293099992e19cddea4e8b849964e9846f4acee11b3948bcc337be8776"
 
 [[package]]
 name = "libredox"
@@ -730,9 +730,9 @@ dependencies = [
 
 [[package]]
 name = "sysinfo"
-version = "0.35.0"
+version = "0.36.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b897c8ea620e181c7955369a31be5f48d9a9121cb59fd33ecef9ff2a34323422"
+checksum = "aab138f5c1bb35231de19049060a87977ad23e04f2303e953bc5c2947ac7dec4"
 dependencies = [
  "libc",
  "memchr",
diff --git a/src/bootstrap/Cargo.toml b/src/bootstrap/Cargo.toml
index 073cebdcae2..8dc41d1dec6 100644
--- a/src/bootstrap/Cargo.toml
+++ b/src/bootstrap/Cargo.toml
@@ -58,7 +58,7 @@ walkdir = "2.4"
 xz2 = "0.1"
 
 # Dependencies needed by the build-metrics feature
-sysinfo = { version = "0.35.0", default-features = false, optional = true, features = ["system"] }
+sysinfo = { version = "0.36.0", default-features = false, optional = true, features = ["system"] }
 
 # Dependencies needed by the `tracing` feature
 tracing = { version = "0.1", optional = true, features = ["attributes"] }
diff --git a/src/bootstrap/README.md b/src/bootstrap/README.md
index 6ce4c6d62fa..2965174b45b 100644
--- a/src/bootstrap/README.md
+++ b/src/bootstrap/README.md
@@ -105,7 +105,7 @@ build/
       debuginfo/
       ...
 
-    # Bootstrap host tools (which are always compiled with the stage0 compiler)
+    # Host tools (which are always compiled with the stage0 compiler)
     # are stored here.
     bootstrap-tools/
 
diff --git a/src/bootstrap/bootstrap.py b/src/bootstrap/bootstrap.py
index d8c6be78247..40e08361a0f 100644
--- a/src/bootstrap/bootstrap.py
+++ b/src/bootstrap/bootstrap.py
@@ -8,6 +8,7 @@ import re
 import shutil
 import subprocess
 import sys
+import sysconfig
 import tarfile
 import tempfile
 
@@ -333,7 +334,11 @@ def default_build_triple(verbose):
         if ostype == "Android":
             kernel = "linux-android"
         else:
-            kernel = "unknown-linux-gnu"
+            python_soabi = sysconfig.get_config_var("SOABI")
+            if python_soabi is not None and "musl" in python_soabi:
+                kernel = "unknown-linux-musl"
+            else:
+                kernel = "unknown-linux-gnu"
     elif kernel == "SunOS":
         kernel = "pc-solaris"
         # On Solaris, uname -m will return a machine classification instead
diff --git a/src/bootstrap/configure.py b/src/bootstrap/configure.py
index c077555b906..b05a5cc8b81 100755
--- a/src/bootstrap/configure.py
+++ b/src/bootstrap/configure.py
@@ -739,19 +739,29 @@ def configure_file(sections, top_level_keys, targets, config):
 
 
 def write_uncommented(target, f):
+    """Writes each block in 'target' that is not composed entirely of comments to 'f'.
+
+    A block is a sequence of non-empty lines separated by empty lines.
+    """
     block = []
-    is_comment = True
+
+    def flush(last):
+        # If the block is entirely made of comments, ignore it
+        entire_block_comments = all(ln.startswith("#") or ln == "" for ln in block)
+        if not entire_block_comments and len(block) > 0:
+            for line in block:
+                f.write(line + "\n")
+            # Required to output a newline before the start of a new section
+            if last:
+                f.write("\n")
+        block.clear()
 
     for line in target:
         block.append(line)
         if len(line) == 0:
-            if not is_comment:
-                for ln in block:
-                    f.write(ln + "\n")
-            block = []
-            is_comment = True
-            continue
-        is_comment = is_comment and line.startswith("#")
+            flush(last=False)
+
+    flush(last=True)
     return f
 
 
diff --git a/src/bootstrap/src/bin/main.rs b/src/bootstrap/src/bin/main.rs
index e1862a451f2..181d71f63c2 100644
--- a/src/bootstrap/src/bin/main.rs
+++ b/src/bootstrap/src/bin/main.rs
@@ -8,6 +8,7 @@
 use std::fs::{self, OpenOptions};
 use std::io::{self, BufRead, BufReader, IsTerminal, Write};
 use std::str::FromStr;
+use std::time::Instant;
 use std::{env, process};
 
 use bootstrap::{
@@ -17,11 +18,17 @@ use bootstrap::{
 #[cfg(feature = "tracing")]
 use tracing::instrument;
 
+fn is_bootstrap_profiling_enabled() -> bool {
+    env::var("BOOTSTRAP_PROFILE").is_ok_and(|v| v == "1")
+}
+
 #[cfg_attr(feature = "tracing", instrument(level = "trace", name = "main"))]
 fn main() {
     #[cfg(feature = "tracing")]
     let _guard = setup_tracing();
 
+    let start_time = Instant::now();
+
     let args = env::args().skip(1).collect::<Vec<_>>();
 
     if Flags::try_parse_verbose_help(&args) {
@@ -96,7 +103,8 @@ fn main() {
     let out_dir = config.out.clone();
 
     debug!("creating new build based on config");
-    Build::new(config).build();
+    let mut build = Build::new(config);
+    build.build();
 
     if suggest_setup {
         println!("WARNING: you have not made a `bootstrap.toml`");
@@ -147,6 +155,10 @@ fn main() {
             t!(file.write_all(lines.join("\n").as_bytes()));
         }
     }
+
+    if is_bootstrap_profiling_enabled() {
+        build.report_summary(start_time);
+    }
 }
 
 fn check_version(config: &Config) -> Option<String> {
@@ -226,7 +238,7 @@ fn setup_tracing() -> impl Drop {
     let mut chrome_layer = tracing_chrome::ChromeLayerBuilder::new().include_args(true);
 
     // Writes the Chrome profile to trace-<unix-timestamp>.json if enabled
-    if !env::var("BOOTSTRAP_PROFILE").is_ok_and(|v| v == "1") {
+    if !is_bootstrap_profiling_enabled() {
         chrome_layer = chrome_layer.writer(io::sink());
     }
 
diff --git a/src/bootstrap/src/core/build_steps/check.rs b/src/bootstrap/src/core/build_steps/check.rs
index 0497bae86a1..cfe090b22dc 100644
--- a/src/bootstrap/src/core/build_steps/check.rs
+++ b/src/bootstrap/src/core/build_steps/check.rs
@@ -4,7 +4,10 @@ use crate::core::build_steps::compile::{
     add_to_sysroot, run_cargo, rustc_cargo, rustc_cargo_env, std_cargo, std_crates_for_run_make,
 };
 use crate::core::build_steps::tool;
-use crate::core::build_steps::tool::{COMPILETEST_ALLOW_FEATURES, SourceType, prepare_tool_cargo};
+use crate::core::build_steps::tool::{
+    COMPILETEST_ALLOW_FEATURES, SourceType, ToolTargetBuildMode, get_tool_target_compiler,
+    prepare_tool_cargo,
+};
 use crate::core::builder::{
     self, Alias, Builder, Kind, RunConfig, ShouldRun, Step, StepMetadata, crate_description,
 };
@@ -47,6 +50,18 @@ impl Step for Std {
     }
 
     fn make_run(run: RunConfig<'_>) {
+        if !run.builder.download_rustc() && run.builder.config.skip_std_check_if_no_download_rustc {
+            eprintln!(
+                "WARNING: `--skip-std-check-if-no-download-rustc` flag was passed and `rust.download-rustc` is not available. Skipping."
+            );
+            return;
+        }
+
+        if run.builder.config.compile_time_deps {
+            // libstd doesn't have any important build scripts and can't have any proc macros
+            return;
+        }
+
         let crates = std_crates_for_run_make(&run);
         run.builder.ensure(Std {
             build_compiler: prepare_compiler_for_check(run.builder, run.target, Mode::Std),
@@ -56,13 +71,6 @@ impl Step for Std {
     }
 
     fn run(self, builder: &Builder<'_>) {
-        if !builder.download_rustc() && builder.config.skip_std_check_if_no_download_rustc {
-            eprintln!(
-                "WARNING: `--skip-std-check-if-no-download-rustc` flag was passed and `rust.download-rustc` is not available. Skipping."
-            );
-            return;
-        }
-
         let build_compiler = self.build_compiler;
         let stage = build_compiler.stage;
         let target = self.target;
@@ -247,9 +255,18 @@ fn prepare_compiler_for_check(
     mode: Mode,
 ) -> Compiler {
     let host = builder.host_target;
+
     match mode {
         Mode::ToolBootstrap => builder.compiler(0, host),
+        Mode::ToolTarget => get_tool_target_compiler(builder, ToolTargetBuildMode::Build(target)),
         Mode::ToolStd => {
+            if builder.config.compile_time_deps {
+                // When --compile-time-deps is passed, we can't use any rustc
+                // other than the bootstrap compiler. Luckily build scripts and
+                // proc macros for tools are unlikely to need nightly.
+                return builder.compiler(0, host);
+            }
+
             // These tools require the local standard library to be checked
             let build_compiler = builder.compiler(builder.top_stage, host);
 
@@ -338,7 +355,7 @@ impl Step for CodegenBackend {
         cargo
             .arg("--manifest-path")
             .arg(builder.src.join(format!("compiler/rustc_codegen_{backend}/Cargo.toml")));
-        rustc_cargo_env(builder, &mut cargo, target, build_compiler.stage);
+        rustc_cargo_env(builder, &mut cargo, target);
 
         let _guard = builder.msg_check(format!("rustc_codegen_{backend}"), target, None);
 
@@ -353,132 +370,18 @@ impl Step for CodegenBackend {
     }
 }
 
-/// Checks Rust analyzer that links to .rmetas from a checked rustc.
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RustAnalyzer {
-    pub build_compiler: Compiler,
-    pub target: TargetSelection,
-}
-
-impl Step for RustAnalyzer {
-    type Output = ();
-    const ONLY_HOSTS: bool = true;
-    const DEFAULT: bool = true;
-
-    fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
-        let builder = run.builder;
-        run.path("src/tools/rust-analyzer").default_condition(
-            builder
-                .config
-                .tools
-                .as_ref()
-                .is_none_or(|tools| tools.iter().any(|tool| tool == "rust-analyzer")),
-        )
-    }
-
-    fn make_run(run: RunConfig<'_>) {
-        let build_compiler = prepare_compiler_for_check(run.builder, run.target, Mode::ToolRustc);
-        run.builder.ensure(RustAnalyzer { build_compiler, target: run.target });
-    }
-
-    fn run(self, builder: &Builder<'_>) {
-        let build_compiler = self.build_compiler;
-        let target = self.target;
-
-        let mut cargo = prepare_tool_cargo(
-            builder,
-            build_compiler,
-            Mode::ToolRustc,
-            target,
-            builder.kind,
-            "src/tools/rust-analyzer",
-            SourceType::InTree,
-            &["in-rust-tree".to_owned()],
-        );
-
-        cargo.allow_features(crate::core::build_steps::tool::RustAnalyzer::ALLOW_FEATURES);
-
-        cargo.arg("--bins");
-        cargo.arg("--tests");
-        cargo.arg("--benches");
-
-        // Cargo's output path in a given stage, compiled by a particular
-        // compiler for the specified target.
-        let stamp = BuildStamp::new(&builder.cargo_out(build_compiler, Mode::ToolRustc, target))
-            .with_prefix("rust-analyzer-check");
-
-        let _guard = builder.msg_check("rust-analyzer artifacts", target, None);
-        run_cargo(builder, cargo, builder.config.free_args.clone(), &stamp, vec![], true, false);
-    }
-
-    fn metadata(&self) -> Option<StepMetadata> {
-        Some(StepMetadata::check("rust-analyzer", self.target).built_by(self.build_compiler))
-    }
-}
-
-/// Compiletest is implicitly "checked" when it gets built in order to run tests,
-/// so this is mainly for people working on compiletest to run locally.
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Compiletest {
-    pub target: TargetSelection,
-}
-
-impl Step for Compiletest {
-    type Output = ();
-    const ONLY_HOSTS: bool = true;
-    const DEFAULT: bool = false;
-
-    fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
-        run.path("src/tools/compiletest")
-    }
-
-    fn make_run(run: RunConfig<'_>) {
-        run.builder.ensure(Compiletest { target: run.target });
-    }
-
-    fn run(self, builder: &Builder<'_>) {
-        let mode = if builder.config.compiletest_use_stage0_libtest {
-            Mode::ToolBootstrap
-        } else {
-            Mode::ToolStd
-        };
-        let build_compiler = prepare_compiler_for_check(builder, self.target, mode);
-
-        let mut cargo = prepare_tool_cargo(
-            builder,
-            build_compiler,
-            mode,
-            self.target,
-            builder.kind,
-            "src/tools/compiletest",
-            SourceType::InTree,
-            &[],
-        );
-
-        cargo.allow_features(COMPILETEST_ALLOW_FEATURES);
-
-        cargo.arg("--all-targets");
-
-        let stamp = BuildStamp::new(&builder.cargo_out(build_compiler, mode, self.target))
-            .with_prefix("compiletest-check");
-
-        let _guard = builder.msg_check("compiletest artifacts", self.target, None);
-        run_cargo(builder, cargo, builder.config.free_args.clone(), &stamp, vec![], true, false);
-    }
-
-    fn metadata(&self) -> Option<StepMetadata> {
-        Some(StepMetadata::check("compiletest", self.target))
-    }
-}
-
 macro_rules! tool_check_step {
     (
         $name:ident {
             // The part of this path after the final '/' is also used as a display name.
             path: $path:literal
             $(, alt_path: $alt_path:literal )*
-            , mode: $mode:path
+            // Closure that returns `Mode` based on the passed `&Builder<'_>`
+            , mode: $mode:expr
+            // Subset of nightly features that are allowed to be used when checking
             $(, allow_features: $allow_features:expr )?
+            // Features that should be enabled when checking
+            $(, enable_features: [$($enable_features:expr),*] )?
             $(, default: $default:literal )?
             $( , )?
         }
@@ -501,10 +404,13 @@ macro_rules! tool_check_step {
 
             fn make_run(run: RunConfig<'_>) {
                 let target = run.target;
-                let build_compiler = prepare_compiler_for_check(run.builder, target, $mode);
+                let builder = run.builder;
+                let mode = $mode(builder);
+
+                let build_compiler = prepare_compiler_for_check(run.builder, target, mode);
 
                 // It doesn't make sense to cross-check bootstrap tools
-                if $mode == Mode::ToolBootstrap && target != run.builder.host_target {
+                if mode == Mode::ToolBootstrap && target != run.builder.host_target {
                     println!("WARNING: not checking bootstrap tool {} for target {target} as it is a bootstrap (host-only) tool", stringify!($path));
                     return;
                 };
@@ -519,7 +425,9 @@ macro_rules! tool_check_step {
                     $( _value = $allow_features; )?
                     _value
                 };
-                run_tool_check_step(builder, build_compiler, target, $path, $mode, allow_features);
+                let extra_features: &[&str] = &[$($($enable_features),*)?];
+                let mode = $mode(builder);
+                run_tool_check_step(builder, build_compiler, target, $path, mode, allow_features, extra_features);
             }
 
             fn metadata(&self) -> Option<StepMetadata> {
@@ -537,9 +445,11 @@ fn run_tool_check_step(
     path: &str,
     mode: Mode,
     allow_features: &str,
+    extra_features: &[&str],
 ) {
     let display_name = path.rsplit('/').next().unwrap();
 
+    let extra_features = extra_features.iter().map(|f| f.to_string()).collect::<Vec<String>>();
     let mut cargo = prepare_tool_cargo(
         builder,
         build_compiler,
@@ -552,12 +462,19 @@ fn run_tool_check_step(
         // steps should probably be marked non-default so that the default
         // checks aren't affected by toolstate being broken.
         SourceType::InTree,
-        &[],
+        &extra_features,
     );
     cargo.allow_features(allow_features);
 
-    // FIXME: check bootstrap doesn't currently work with --all-targets
-    cargo.arg("--all-targets");
+    // FIXME: check bootstrap doesn't currently work when multiple targets are checked
+    // FIXME: rust-analyzer does not work with --all-targets
+    if display_name == "rust-analyzer" {
+        cargo.arg("--bins");
+        cargo.arg("--tests");
+        cargo.arg("--benches");
+    } else {
+        cargo.arg("--all-targets");
+    }
 
     let stamp = BuildStamp::new(&builder.cargo_out(build_compiler, mode, target))
         .with_prefix(&format!("{display_name}-check"));
@@ -576,43 +493,66 @@ fn run_tool_check_step(
 tool_check_step!(Rustdoc {
     path: "src/tools/rustdoc",
     alt_path: "src/librustdoc",
-    mode: Mode::ToolRustc
+    mode: |_builder| Mode::ToolRustc
 });
 // Clippy, miri and Rustfmt are hybrids. They are external tools, but use a git subtree instead
 // of a submodule. Since the SourceType only drives the deny-warnings
 // behavior, treat it as in-tree so that any new warnings in clippy will be
 // rejected.
-tool_check_step!(Clippy { path: "src/tools/clippy", mode: Mode::ToolRustc });
-tool_check_step!(Miri { path: "src/tools/miri", mode: Mode::ToolRustc });
-tool_check_step!(CargoMiri { path: "src/tools/miri/cargo-miri", mode: Mode::ToolRustc });
-tool_check_step!(Rustfmt { path: "src/tools/rustfmt", mode: Mode::ToolRustc });
+tool_check_step!(Clippy { path: "src/tools/clippy", mode: |_builder| Mode::ToolRustc });
+tool_check_step!(Miri { path: "src/tools/miri", mode: |_builder| Mode::ToolRustc });
+tool_check_step!(CargoMiri { path: "src/tools/miri/cargo-miri", mode: |_builder| Mode::ToolRustc });
+tool_check_step!(Rustfmt { path: "src/tools/rustfmt", mode: |_builder| Mode::ToolRustc });
+tool_check_step!(RustAnalyzer {
+    path: "src/tools/rust-analyzer",
+    mode: |_builder| Mode::ToolRustc,
+    allow_features: tool::RustAnalyzer::ALLOW_FEATURES,
+    enable_features: ["in-rust-tree"],
+});
 tool_check_step!(MiroptTestTools {
     path: "src/tools/miropt-test-tools",
-    mode: Mode::ToolBootstrap
+    mode: |_builder| Mode::ToolBootstrap
 });
 // We want to test the local std
 tool_check_step!(TestFloatParse {
     path: "src/tools/test-float-parse",
-    mode: Mode::ToolStd,
+    mode: |_builder| Mode::ToolStd,
     allow_features: tool::TestFloatParse::ALLOW_FEATURES
 });
 tool_check_step!(FeaturesStatusDump {
     path: "src/tools/features-status-dump",
-    mode: Mode::ToolBootstrap
+    mode: |_builder| Mode::ToolBootstrap
 });
 
-tool_check_step!(Bootstrap { path: "src/bootstrap", mode: Mode::ToolBootstrap, default: false });
+tool_check_step!(Bootstrap {
+    path: "src/bootstrap",
+    mode: |_builder| Mode::ToolBootstrap,
+    default: false
+});
 
 // `run-make-support` will be built as part of suitable run-make compiletest test steps, but support
 // check to make it easier to work on.
 tool_check_step!(RunMakeSupport {
     path: "src/tools/run-make-support",
-    mode: Mode::ToolBootstrap,
+    mode: |_builder| Mode::ToolBootstrap,
     default: false
 });
 
 tool_check_step!(CoverageDump {
     path: "src/tools/coverage-dump",
-    mode: Mode::ToolBootstrap,
+    mode: |_builder| Mode::ToolBootstrap,
     default: false
 });
+
+// Compiletest is implicitly "checked" when it gets built in order to run tests,
+// so this is mainly for people working on compiletest to run locally.
+tool_check_step!(Compiletest {
+    path: "src/tools/compiletest",
+    mode: |builder: &Builder<'_>| if builder.config.compiletest_use_stage0_libtest {
+        Mode::ToolBootstrap
+    } else {
+        Mode::ToolStd
+    },
+    allow_features: COMPILETEST_ALLOW_FEATURES,
+    default: false,
+});
diff --git a/src/bootstrap/src/core/build_steps/compile.rs b/src/bootstrap/src/core/build_steps/compile.rs
index 3e2bdc2d6b5..c7e7b0160b1 100644
--- a/src/bootstrap/src/core/build_steps/compile.rs
+++ b/src/bootstrap/src/core/build_steps/compile.rs
@@ -19,7 +19,7 @@ use serde_derive::Deserialize;
 use tracing::{instrument, span};
 
 use crate::core::build_steps::gcc::{Gcc, add_cg_gcc_cargo_flags};
-use crate::core::build_steps::tool::SourceType;
+use crate::core::build_steps::tool::{SourceType, copy_lld_artifacts};
 use crate::core::build_steps::{dist, llvm};
 use crate::core::builder;
 use crate::core::builder::{
@@ -449,26 +449,24 @@ fn copy_self_contained_objects(
     target_deps
 }
 
-/// Resolves standard library crates for `Std::run_make` for any build kind (like check, build, clippy, etc.).
+/// Resolves standard library crates for `Std::run_make` for any build kind (like check, doc,
+/// build, clippy, etc.).
 pub fn std_crates_for_run_make(run: &RunConfig<'_>) -> Vec<String> {
-    // FIXME: Extend builder tests to cover the `crates` field of `Std` instances.
-    if cfg!(test) {
-        return vec![];
-    }
-
-    let has_alias = run.paths.iter().any(|set| set.assert_single_path().path.ends_with("library"));
+    let mut crates = run.make_run_crates(builder::Alias::Library);
+
+    // For no_std targets, we only want to check core and alloc
+    // Regardless of core/alloc being selected explicitly or via the "library" default alias,
+    // we only want to keep these two crates.
+    // The set of no_std crates should be kept in sync with what `Builder::std_cargo` does.
+    // Note: an alternative design would be to return an enum from this function (Default vs Subset)
+    // of crates. However, several steps currently pass `-p <package>` even if all crates are
+    // selected, because Cargo behaves differently in that case. To keep that behavior without
+    // making further changes, we pre-filter the no-std crates here.
     let target_is_no_std = run.builder.no_std(run.target).unwrap_or(false);
-
-    // For no_std targets, do not add any additional crates to the compilation other than what `compile::std_cargo` already adds for no_std targets.
     if target_is_no_std {
-        vec![]
-    }
-    // If the paths include "library", build the entire standard library.
-    else if has_alias {
-        run.make_run_crates(builder::Alias::Library)
-    } else {
-        run.cargo_crates_in_set()
+        crates.retain(|c| c == "core" || c == "alloc");
     }
+    crates
 }
 
 /// Tries to find LLVM's `compiler-rt` source directory, for building `library/profiler_builtins`.
@@ -1318,15 +1316,10 @@ pub fn rustc_cargo(
         cargo.env("RUSTC_WRAPPER", ccache);
     }
 
-    rustc_cargo_env(builder, cargo, target, build_compiler.stage);
+    rustc_cargo_env(builder, cargo, target);
 }
 
-pub fn rustc_cargo_env(
-    builder: &Builder<'_>,
-    cargo: &mut Cargo,
-    target: TargetSelection,
-    build_stage: u32,
-) {
+pub fn rustc_cargo_env(builder: &Builder<'_>, cargo: &mut Cargo, target: TargetSelection) {
     // Set some configuration variables picked up by build scripts and
     // the compiler alike
     cargo
@@ -1369,9 +1362,7 @@ pub fn rustc_cargo_env(
     }
 
     // Enable rustc's env var for `rust-lld` when requested.
-    if builder.config.lld_enabled
-        && (builder.config.channel == "dev" || builder.config.channel == "nightly")
-    {
+    if builder.config.lld_enabled {
         cargo.env("CFG_USE_SELF_CONTAINED_LINKER", "1");
     }
 
@@ -1383,18 +1374,24 @@ pub fn rustc_cargo_env(
         cargo.rustflag("--cfg=llvm_enzyme");
     }
 
-    // Note that this is disabled if LLVM itself is disabled or we're in a check
-    // build. If we are in a check build we still go ahead here presuming we've
-    // detected that LLVM is already built and good to go which helps prevent
-    // busting caches (e.g. like #71152).
+    // These conditionals represent a tension between three forces:
+    // - For non-check builds, we need to define some LLVM-related environment
+    //   variables, requiring LLVM to have been built.
+    // - For check builds, we want to avoid building LLVM if possible.
+    // - Check builds and non-check builds should have the same environment if
+    //   possible, to avoid unnecessary rebuilds due to cache-busting.
+    //
+    // Therefore we try to avoid building LLVM for check builds, but only if
+    // building LLVM would be expensive. If "building" LLVM is cheap
+    // (i.e. it's already built or is downloadable), we prefer to maintain a
+    // consistent environment between check and non-check builds.
     if builder.config.llvm_enabled(target) {
-        let building_is_expensive =
+        let building_llvm_is_expensive =
             crate::core::build_steps::llvm::prebuilt_llvm_config(builder, target, false)
                 .should_build();
-        // `top_stage == stage` might be false for `check --stage 1`, if we are building the stage 1 compiler
-        let can_skip_build = builder.kind == Kind::Check && builder.top_stage == build_stage;
-        let should_skip_build = building_is_expensive && can_skip_build;
-        if !should_skip_build {
+
+        let skip_llvm = (builder.kind == Kind::Check) && building_llvm_is_expensive;
+        if !skip_llvm {
             rustc_llvm_env(builder, cargo, target)
         }
     }
@@ -1411,6 +1408,9 @@ pub fn rustc_cargo_env(
 
 /// Pass down configuration from the LLVM build into the build of
 /// rustc_llvm and rustc_codegen_llvm.
+///
+/// Note that this has the side-effect of _building LLVM_, which is sometimes
+/// unwanted (e.g. for check builds).
 fn rustc_llvm_env(builder: &Builder<'_>, cargo: &mut Cargo, target: TargetSelection) {
     if builder.config.is_rust_llvm(target) {
         cargo.env("LLVM_RUSTLLVM", "1");
@@ -1669,7 +1669,7 @@ impl Step for CodegenBackend {
         cargo
             .arg("--manifest-path")
             .arg(builder.src.join(format!("compiler/rustc_codegen_{backend}/Cargo.toml")));
-        rustc_cargo_env(builder, &mut cargo, target, compiler.stage);
+        rustc_cargo_env(builder, &mut cargo, target);
 
         // Ideally, we'd have a separate step for the individual codegen backends,
         // like we have in tests (test::CodegenGCC) but that would require a lot of restructuring.
@@ -2054,19 +2054,26 @@ impl Step for Assemble {
             }
         }
 
-        let maybe_install_llvm_bitcode_linker = |compiler| {
+        let maybe_install_llvm_bitcode_linker = || {
             if builder.config.llvm_bitcode_linker_enabled {
                 trace!("llvm-bitcode-linker enabled, installing");
-                let llvm_bitcode_linker =
-                    builder.ensure(crate::core::build_steps::tool::LlvmBitcodeLinker {
-                        compiler,
-                        target: target_compiler.host,
-                        extra_features: vec![],
-                    });
+                let llvm_bitcode_linker = builder.ensure(
+                    crate::core::build_steps::tool::LlvmBitcodeLinker::from_target_compiler(
+                        builder,
+                        target_compiler,
+                    ),
+                );
+
+                // Copy the llvm-bitcode-linker to the self-contained binary directory
+                let bindir_self_contained = builder
+                    .sysroot(target_compiler)
+                    .join(format!("lib/rustlib/{}/bin/self-contained", target_compiler.host));
                 let tool_exe = exe("llvm-bitcode-linker", target_compiler.host);
+
+                t!(fs::create_dir_all(&bindir_self_contained));
                 builder.copy_link(
                     &llvm_bitcode_linker.tool_path,
-                    &libdir_bin.join(tool_exe),
+                    &bindir_self_contained.join(tool_exe),
                     FileType::Executable,
                 );
             }
@@ -2087,9 +2094,9 @@ impl Step for Assemble {
                 builder.info(&format!("Creating a sysroot for stage{stage} compiler (use `rustup toolchain link 'name' build/host/stage{stage}`)", stage = target_compiler.stage));
             }
 
-            let mut precompiled_compiler = target_compiler;
-            precompiled_compiler.forced_compiler(true);
-            maybe_install_llvm_bitcode_linker(precompiled_compiler);
+            // FIXME: this is incomplete, we do not copy a bunch of other stuff to the downloaded
+            // sysroot...
+            maybe_install_llvm_bitcode_linker();
 
             return target_compiler;
         }
@@ -2254,10 +2261,12 @@ impl Step for Assemble {
         copy_codegen_backends_to_sysroot(builder, build_compiler, target_compiler);
 
         if builder.config.lld_enabled {
-            builder.ensure(crate::core::build_steps::tool::LldWrapper {
-                build_compiler,
-                target_compiler,
-            });
+            let lld_wrapper =
+                builder.ensure(crate::core::build_steps::tool::LldWrapper::for_use_by_compiler(
+                    builder,
+                    target_compiler,
+                ));
+            copy_lld_artifacts(builder, lld_wrapper, target_compiler);
         }
 
         if builder.config.llvm_enabled(target_compiler.host) && builder.config.llvm_tools_enabled {
@@ -2282,15 +2291,14 @@ impl Step for Assemble {
         }
 
         // In addition to `rust-lld` also install `wasm-component-ld` when
-        // LLD is enabled. This is a relatively small binary that primarily
-        // delegates to the `rust-lld` binary for linking and then runs
-        // logic to create the final binary. This is used by the
-        // `wasm32-wasip2` target of Rust.
+        // is enabled. This is used by the `wasm32-wasip2` target of Rust.
         if builder.tool_enabled("wasm-component-ld") {
-            let wasm_component = builder.ensure(crate::core::build_steps::tool::WasmComponentLd {
-                compiler: build_compiler,
-                target: target_compiler.host,
-            });
+            let wasm_component = builder.ensure(
+                crate::core::build_steps::tool::WasmComponentLd::for_use_by_compiler(
+                    builder,
+                    target_compiler,
+                ),
+            );
             builder.copy_link(
                 &wasm_component.tool_path,
                 &libdir_bin.join(wasm_component.tool_path.file_name().unwrap()),
@@ -2298,7 +2306,7 @@ impl Step for Assemble {
             );
         }
 
-        maybe_install_llvm_bitcode_linker(target_compiler);
+        maybe_install_llvm_bitcode_linker();
 
         // Ensure that `libLLVM.so` ends up in the newly build compiler directory,
         // so that it can be found when the newly built `rustc` is run.
@@ -2398,10 +2406,10 @@ pub fn run_cargo(
                 keep = true;
             } else if rlib_only_metadata {
                 if filename.contains("jemalloc_sys")
-                    || filename.contains("rustc_smir")
-                    || filename.contains("stable_mir")
+                    || filename.contains("rustc_public_bridge")
+                    || filename.contains("rustc_public")
                 {
-                    // jemalloc_sys and rustc_smir are not linked into librustc_driver.so,
+                    // jemalloc_sys and rustc_public_bridge are not linked into librustc_driver.so,
                     // so we need to distribute them as rlib to be able to use them.
                     keep |= filename.ends_with(".rlib");
                 } else {
@@ -2572,7 +2580,7 @@ pub fn stream_cargo(
     }
 
     // Make sure Cargo actually succeeded after we read all of its stdout.
-    let status = t!(streaming_command.wait());
+    let status = t!(streaming_command.wait(&builder.config.exec_ctx));
     if builder.is_verbose() && !status.success() {
         eprintln!(
             "command did not execute successfully: {cmd:?}\n\
diff --git a/src/bootstrap/src/core/build_steps/dist.rs b/src/bootstrap/src/core/build_steps/dist.rs
index 25b7e5a1b5d..39e4fb2ac01 100644
--- a/src/bootstrap/src/core/build_steps/dist.rs
+++ b/src/bootstrap/src/core/build_steps/dist.rs
@@ -1575,7 +1575,10 @@ impl Step for Extended {
             compiler: builder.compiler(stage, target),
             backend: "cranelift".to_string(),
         });
-        add_component!("llvm-bitcode-linker" => LlvmBitcodeLinker {compiler, target});
+        add_component!("llvm-bitcode-linker" => LlvmBitcodeLinker {
+            build_compiler: compiler,
+            target
+        });
 
         let etc = builder.src.join("src/etc/installer");
 
@@ -2341,9 +2344,13 @@ impl Step for LlvmTools {
     }
 }
 
+/// Distributes the `llvm-bitcode-linker` tool so that it can be used by a compiler whose host
+/// is `target`.
 #[derive(Debug, PartialOrd, Ord, Clone, Hash, PartialEq, Eq)]
 pub struct LlvmBitcodeLinker {
-    pub compiler: Compiler,
+    /// The linker will be compiled by this compiler.
+    pub build_compiler: Compiler,
+    /// The linker will by usable by rustc on this host.
     pub target: TargetSelection,
 }
 
@@ -2359,9 +2366,8 @@ impl Step for LlvmBitcodeLinker {
 
     fn make_run(run: RunConfig<'_>) {
         run.builder.ensure(LlvmBitcodeLinker {
-            compiler: run.builder.compiler_for(
-                run.builder.top_stage,
-                run.builder.config.host_target,
+            build_compiler: tool::LlvmBitcodeLinker::get_build_compiler_for_target(
+                run.builder,
                 run.target,
             ),
             target: run.target,
@@ -2369,13 +2375,10 @@ impl Step for LlvmBitcodeLinker {
     }
 
     fn run(self, builder: &Builder<'_>) -> Option<GeneratedTarball> {
-        let compiler = self.compiler;
         let target = self.target;
 
-        builder.ensure(compile::Rustc::new(compiler, target));
-
-        let llbc_linker =
-            builder.ensure(tool::LlvmBitcodeLinker { compiler, target, extra_features: vec![] });
+        let llbc_linker = builder
+            .ensure(tool::LlvmBitcodeLinker::from_build_compiler(self.build_compiler, target));
 
         let self_contained_bin_dir = format!("lib/rustlib/{}/bin/self-contained", target.triple);
 
diff --git a/src/bootstrap/src/core/build_steps/doc.rs b/src/bootstrap/src/core/build_steps/doc.rs
index f7c4c5ad0bb..37418f640ac 100644
--- a/src/bootstrap/src/core/build_steps/doc.rs
+++ b/src/bootstrap/src/core/build_steps/doc.rs
@@ -665,7 +665,11 @@ impl Step for Std {
     }
 
     fn metadata(&self) -> Option<StepMetadata> {
-        Some(StepMetadata::doc("std", self.target).stage(self.stage))
+        Some(
+            StepMetadata::doc("std", self.target)
+                .stage(self.stage)
+                .with_metadata(format!("crates=[{}]", self.crates.join(","))),
+        )
     }
 }
 
@@ -739,10 +743,6 @@ fn doc_std(
     }
 
     for krate in requested_crates {
-        if krate == "sysroot" {
-            // The sysroot crate is an implementation detail, don't include it in public docs.
-            continue;
-        }
         cargo.arg("-p").arg(krate);
     }
 
diff --git a/src/bootstrap/src/core/build_steps/gcc.rs b/src/bootstrap/src/core/build_steps/gcc.rs
index 899e3fd9a45..d4cbbe60921 100644
--- a/src/bootstrap/src/core/build_steps/gcc.rs
+++ b/src/bootstrap/src/core/build_steps/gcc.rs
@@ -220,21 +220,18 @@ fn build_gcc(metadata: &Meta, builder: &Builder<'_>, target: TargetSelection) {
     t!(fs::create_dir_all(install_dir));
 
     // GCC creates files (e.g. symlinks to the downloaded dependencies)
-    // in the source directory, which does not work with our CI setup, where we mount
+    // in the source directory, which does not work with our CI/Docker setup, where we mount
     // source directories as read-only on Linux.
-    // Therefore, as a part of the build in CI, we first copy the whole source directory
-    // to the build directory, and perform the build from there.
-    let src_dir = if builder.config.is_running_on_ci {
-        let src_dir = builder.gcc_out(target).join("src");
-        if src_dir.exists() {
-            builder.remove_dir(&src_dir);
-        }
-        builder.create_dir(&src_dir);
-        builder.cp_link_r(root, &src_dir);
-        src_dir
-    } else {
-        root.clone()
-    };
+    // And in general, we shouldn't be modifying the source directories if possible, even for local
+    // builds.
+    // Therefore, we first copy the whole source directory to the build directory, and perform the
+    // build from there.
+    let src_dir = builder.gcc_out(target).join("src");
+    if src_dir.exists() {
+        builder.remove_dir(&src_dir);
+    }
+    builder.create_dir(&src_dir);
+    builder.cp_link_r(root, &src_dir);
 
     command(src_dir.join("contrib/download_prerequisites")).current_dir(&src_dir).run(builder);
     let mut configure_cmd = command(src_dir.join("configure"));
diff --git a/src/bootstrap/src/core/build_steps/install.rs b/src/bootstrap/src/core/build_steps/install.rs
index 4434d6658eb..4156b49a8b3 100644
--- a/src/bootstrap/src/core/build_steps/install.rs
+++ b/src/bootstrap/src/core/build_steps/install.rs
@@ -287,7 +287,7 @@ install!((self, builder, _config),
         }
     };
     LlvmBitcodeLinker, alias = "llvm-bitcode-linker", Self::should_build(_config), only_hosts: true, {
-        if let Some(tarball) = builder.ensure(dist::LlvmBitcodeLinker { compiler: self.compiler, target: self.target }) {
+        if let Some(tarball) = builder.ensure(dist::LlvmBitcodeLinker { build_compiler: self.compiler, target: self.target }) {
             install_sh(builder, "llvm-bitcode-linker", self.compiler.stage, Some(self.target), &tarball);
         } else {
             builder.info(
diff --git a/src/bootstrap/src/core/build_steps/mod.rs b/src/bootstrap/src/core/build_steps/mod.rs
index fcb6abea434..c2ad9a4df59 100644
--- a/src/bootstrap/src/core/build_steps/mod.rs
+++ b/src/bootstrap/src/core/build_steps/mod.rs
@@ -11,7 +11,6 @@ pub(crate) mod llvm;
 pub(crate) mod perf;
 pub(crate) mod run;
 pub(crate) mod setup;
-pub(crate) mod suggest;
 pub(crate) mod synthetic_targets;
 pub(crate) mod test;
 pub(crate) mod tool;
diff --git a/src/bootstrap/src/core/build_steps/setup.rs b/src/bootstrap/src/core/build_steps/setup.rs
index 37fc85518e0..9f9af1d9abe 100644
--- a/src/bootstrap/src/core/build_steps/setup.rs
+++ b/src/bootstrap/src/core/build_steps/setup.rs
@@ -586,12 +586,14 @@ Select which editor you would like to set up [default: None]: ";
                 "b5dd299b93dca3ceeb9b335f929293cb3d4bf4977866fbe7ceeac2a8a9f99088",
                 "631c837b0e98ae35fd48b0e5f743b1ca60adadf2d0a2b23566ba25df372cf1a9",
                 "080955765db84bb6cbf178879f489c4e2369397626a6ecb3debedb94a9d0b3ce",
+                "f501475c6654187091c924ae26187fa5791d74d4a8ab3fb61fbbe4c0275aade1",
             ],
             EditorKind::Helix => &[
                 "2d3069b8cf1b977e5d4023965eb6199597755e6c96c185ed5f2854f98b83d233",
                 "6736d61409fbebba0933afd2e4c44ff2f97c1cb36cf0299a7f4a7819b8775040",
                 "f252dcc30ca85a193a699581e5e929d5bd6c19d40d7a7ade5e257a9517a124a5",
                 "198c195ed0c070d15907b279b8b4ea96198ca71b939f5376454f3d636ab54da5",
+                "1c43ead340b20792b91d02b08494ee68708e7e09f56b6766629b4b72079208f1",
             ],
             EditorKind::Vim | EditorKind::VsCode => &[
                 "ea67e259dedf60d4429b6c349a564ffcd1563cf41c920a856d1f5b16b4701ac8",
@@ -607,12 +609,14 @@ Select which editor you would like to set up [default: None]: ";
                 "e53e9129ca5ee5dcbd6ec8b68c2d87376474eb154992deba3c6d9ab1703e0717",
                 "f954316090936c7e590c253ca9d524008375882fa13c5b41d7e2547a896ff893",
                 "701b73751efd7abd6487f2c79348dab698af7ac4427b79fa3d2087c867144b12",
+                "a61df796c0c007cb6512127330564e49e57d558dec715703916a928b072a1054",
             ],
             EditorKind::Zed => &[
                 "bbce727c269d1bd0c98afef4d612eb4ce27aea3c3a8968c5f10b31affbc40b6c",
                 "a5380cf5dd9328731aecc5dfb240d16dac46ed272126b9728006151ef42f5909",
                 "2e96bf0d443852b12f016c8fc9840ab3d0a2b4fe0b0fb3a157e8d74d5e7e0e26",
                 "4fadd4c87389a601a27db0d3d74a142fa3a2e656ae78982e934dbe24bee32ad6",
+                "f0bb3d23ab1a49175ab0ef5c4071af95bb03d01d460776cdb716d91333443382",
             ],
         }
     }
diff --git a/src/bootstrap/src/core/build_steps/suggest.rs b/src/bootstrap/src/core/build_steps/suggest.rs
deleted file mode 100644
index fd4918961ad..00000000000
--- a/src/bootstrap/src/core/build_steps/suggest.rs
+++ /dev/null
@@ -1,68 +0,0 @@
-//! Attempt to magically identify good tests to run
-
-use std::path::PathBuf;
-use std::str::FromStr;
-
-use clap::Parser;
-
-use crate::core::build_steps::tool::Tool;
-use crate::core::builder::Builder;
-
-/// Suggests a list of possible `x.py` commands to run based on modified files in branch.
-pub fn suggest(builder: &Builder<'_>, run: bool) {
-    let git_config = builder.config.git_config();
-    let suggestions = builder
-        .tool_cmd(Tool::SuggestTests)
-        .env("SUGGEST_TESTS_NIGHTLY_BRANCH", git_config.nightly_branch)
-        .env("SUGGEST_TESTS_MERGE_COMMIT_EMAIL", git_config.git_merge_commit_email)
-        .run_capture_stdout(builder)
-        .stdout();
-
-    let suggestions = suggestions
-        .lines()
-        .map(|line| {
-            let mut sections = line.split_ascii_whitespace();
-
-            // this code expects one suggestion per line in the following format:
-            // <x_subcommand> {some number of flags} [optional stage number]
-            let cmd = sections.next().unwrap();
-            let stage = sections.next_back().and_then(|s| str::parse(s).ok());
-            let paths: Vec<PathBuf> = sections.map(|p| PathBuf::from_str(p).unwrap()).collect();
-
-            (cmd, stage, paths)
-        })
-        .collect::<Vec<_>>();
-
-    if !suggestions.is_empty() {
-        println!("==== SUGGESTIONS ====");
-        for sug in &suggestions {
-            print!("x {} ", sug.0);
-            if let Some(stage) = sug.1 {
-                print!("--stage {stage} ");
-            }
-
-            for path in &sug.2 {
-                print!("{} ", path.display());
-            }
-            println!();
-        }
-        println!("=====================");
-    } else {
-        println!("No suggestions found!");
-        return;
-    }
-
-    if run {
-        for sug in suggestions {
-            let mut build: crate::Build = builder.build.clone();
-            build.config.paths = sug.2;
-            build.config.cmd = crate::core::config::flags::Flags::parse_from(["x.py", sug.0]).cmd;
-            if let Some(stage) = sug.1 {
-                build.config.stage = stage;
-            }
-            build.build();
-        }
-    } else {
-        println!("HELP: consider using the `--run` flag to automatically run suggested tests");
-    }
-}
diff --git a/src/bootstrap/src/core/build_steps/test.rs b/src/bootstrap/src/core/build_steps/test.rs
index a5b7b22aba8..d346062761c 100644
--- a/src/bootstrap/src/core/build_steps/test.rs
+++ b/src/bootstrap/src/core/build_steps/test.rs
@@ -47,12 +47,11 @@ impl Step for CrateBootstrap {
     const DEFAULT: bool = true;
 
     fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
-        // This step is responsible for several different tool paths. By default
-        // it will test all of them, but requesting specific tools on the
-        // command-line (e.g. `./x test suggest-tests`) will test only the
-        // specified tools.
+        // This step is responsible for several different tool paths.
+        //
+        // By default, it will test all of them, but requesting specific tools on the command-line
+        // (e.g. `./x test src/tools/coverage-dump`) will test only the specified tools.
         run.path("src/tools/jsondoclint")
-            .path("src/tools/suggest-tests")
             .path("src/tools/replace-version-placeholder")
             .path("src/tools/coverage-dump")
             // We want `./x test tidy` to _run_ the tidy tool, not its tests.
@@ -262,7 +261,13 @@ impl Step for Cargotest {
             .args(builder.config.test_args())
             .env("RUSTC", builder.rustc(compiler))
             .env("RUSTDOC", builder.rustdoc(compiler));
-        add_rustdoc_cargo_linker_args(&mut cmd, builder, compiler.host, LldThreads::No);
+        add_rustdoc_cargo_linker_args(
+            &mut cmd,
+            builder,
+            compiler.host,
+            LldThreads::No,
+            compiler.stage,
+        );
         cmd.delay_failure().run(builder);
     }
 }
@@ -550,8 +555,13 @@ impl Step for Miri {
         // Miri has its own "target dir" for ui test dependencies. Make sure it gets cleared when
         // the sysroot gets rebuilt, to avoid "found possibly newer version of crate `std`" errors.
         if !builder.config.dry_run() {
-            let ui_test_dep_dir =
-                builder.stage_out(miri.build_compiler, Mode::ToolStd).join("miri_ui");
+            // This has to match `CARGO_TARGET_TMPDIR` in Miri's `ui.rs`.
+            // This means we need `host` here as that's the target `ui.rs` is built for.
+            let ui_test_dep_dir = builder
+                .stage_out(miri.build_compiler, Mode::ToolStd)
+                .join(host)
+                .join("tmp")
+                .join("miri_ui");
             // The mtime of `miri_sysroot` changes when the sysroot gets rebuilt (also see
             // <https://github.com/RalfJung/rustc-build-sysroot/commit/10ebcf60b80fe2c3dc765af0ff19fdc0da4b7466>).
             // We can hence use that directly as a signal to clear the ui test dir.
@@ -674,9 +684,9 @@ impl Step for CargoMiri {
                 cargo.arg("--doc");
             }
         }
-
-        // Finally, pass test-args and run everything.
         cargo.arg("--").args(builder.config.test_args());
+
+        // Finally, run everything.
         let mut cargo = BootstrapCommand::from(cargo);
         {
             let _guard = builder.msg_sysroot_tool(Kind::Test, stage, "cargo-miri", host, target);
@@ -729,7 +739,6 @@ impl Step for CompiletestTest {
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct Clippy {
-    stage: u32,
     host: TargetSelection,
 }
 
@@ -743,33 +752,23 @@ impl Step for Clippy {
     }
 
     fn make_run(run: RunConfig<'_>) {
-        // If stage is explicitly set or not lower than 2, keep it. Otherwise, make sure it's at least 2
-        // as tests for this step don't work with a lower stage.
-        let stage = if run.builder.config.is_explicit_stage() || run.builder.top_stage >= 2 {
-            run.builder.top_stage
-        } else {
-            2
-        };
-
-        run.builder.ensure(Clippy { stage, host: run.target });
+        run.builder.ensure(Clippy { host: run.target });
     }
 
     /// Runs `cargo test` for clippy.
     fn run(self, builder: &Builder<'_>) {
-        let stage = self.stage;
+        let stage = builder.top_stage;
         let host = self.host;
-        let compiler = builder.compiler(stage, host);
-
-        if stage < 2 {
-            eprintln!("WARNING: clippy tests on stage {stage} may not behave well.");
-            eprintln!("HELP: consider using stage 2");
-        }
+        // We need to carefully distinguish the compiler that builds clippy, and the compiler
+        // that is linked into the clippy being tested. `target_compiler` is the latter,
+        // and it must also be used by clippy's test runner to build tests and their dependencies.
+        let target_compiler = builder.compiler(stage, host);
 
-        let tool_result = builder.ensure(tool::Clippy { compiler, target: self.host });
-        let compiler = tool_result.build_compiler;
+        let tool_result = builder.ensure(tool::Clippy { compiler: target_compiler, target: host });
+        let tool_compiler = tool_result.build_compiler;
         let mut cargo = tool::prepare_tool_cargo(
             builder,
-            compiler,
+            tool_compiler,
             Mode::ToolRustc,
             host,
             Kind::Test,
@@ -778,11 +777,17 @@ impl Step for Clippy {
             &[],
         );
 
-        cargo.env("RUSTC_TEST_SUITE", builder.rustc(compiler));
-        cargo.env("RUSTC_LIB_PATH", builder.rustc_libdir(compiler));
-        let host_libs = builder.stage_out(compiler, Mode::ToolRustc).join(builder.cargo_dir());
+        cargo.env("RUSTC_TEST_SUITE", builder.rustc(tool_compiler));
+        cargo.env("RUSTC_LIB_PATH", builder.rustc_libdir(tool_compiler));
+        let host_libs = builder.stage_out(tool_compiler, Mode::ToolRustc).join(builder.cargo_dir());
         cargo.env("HOST_LIBS", host_libs);
 
+        // Build the standard library that the tests can use.
+        builder.std(target_compiler, host);
+        cargo.env("TEST_SYSROOT", builder.sysroot(target_compiler));
+        cargo.env("TEST_RUSTC", builder.rustc(target_compiler));
+        cargo.env("TEST_RUSTC_LIB", builder.rustc_libdir(target_compiler));
+
         // Collect paths of tests to run
         'partially_test: {
             let paths = &builder.config.paths[..];
@@ -803,7 +808,8 @@ impl Step for Clippy {
         cargo.add_rustc_lib_path(builder);
         let cargo = prepare_cargo_test(cargo, &[], &[], host, builder);
 
-        let _guard = builder.msg_sysroot_tool(Kind::Test, compiler.stage, "clippy", host, host);
+        let _guard =
+            builder.msg_sysroot_tool(Kind::Test, tool_compiler.stage, "clippy", host, host);
 
         // Clippy reports errors if it blessed the outputs
         if cargo.allow_failure().run(builder) {
@@ -857,7 +863,7 @@ impl Step for RustdocTheme {
             .env("CFG_RELEASE_CHANNEL", &builder.config.channel)
             .env("RUSTDOC_REAL", builder.rustdoc(self.compiler))
             .env("RUSTC_BOOTSTRAP", "1");
-        cmd.args(linker_args(builder, self.compiler.host, LldThreads::No));
+        cmd.args(linker_args(builder, self.compiler.host, LldThreads::No, self.compiler.stage));
 
         cmd.delay_failure().run(builder);
     }
@@ -1033,7 +1039,13 @@ impl Step for RustdocGUI {
         cmd.env("RUSTDOC", builder.rustdoc(self.compiler))
             .env("RUSTC", builder.rustc(self.compiler));
 
-        add_rustdoc_cargo_linker_args(&mut cmd, builder, self.compiler.host, LldThreads::No);
+        add_rustdoc_cargo_linker_args(
+            &mut cmd,
+            builder,
+            self.compiler.host,
+            LldThreads::No,
+            self.compiler.stage,
+        );
 
         for path in &builder.paths {
             if let Some(p) = helpers::is_valid_test_suite_arg(path, "tests/rustdoc-gui", builder) {
@@ -1330,7 +1342,12 @@ test!(Ui { path: "tests/ui", mode: "ui", suite: "ui", default: true });
 
 test!(Crashes { path: "tests/crashes", mode: "crashes", suite: "crashes", default: true });
 
-test!(Codegen { path: "tests/codegen", mode: "codegen", suite: "codegen", default: true });
+test!(CodegenLlvm {
+    path: "tests/codegen-llvm",
+    mode: "codegen",
+    suite: "codegen-llvm",
+    default: true
+});
 
 test!(CodegenUnits {
     path: "tests/codegen-units",
@@ -1395,7 +1412,12 @@ test!(Pretty {
 
 test!(RunMake { path: "tests/run-make", mode: "run-make", suite: "run-make", default: true });
 
-test!(Assembly { path: "tests/assembly", mode: "assembly", suite: "assembly", default: true });
+test!(AssemblyLlvm {
+    path: "tests/assembly-llvm",
+    mode: "assembly",
+    suite: "assembly-llvm",
+    default: true
+});
 
 /// Runs the coverage test suite at `tests/coverage` in some or all of the
 /// coverage test modes.
@@ -1603,7 +1625,7 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
         let suite_path = self.path;
 
         // Skip codegen tests if they aren't enabled in configuration.
-        if !builder.config.codegen_tests && suite == "codegen" {
+        if !builder.config.codegen_tests && mode == "codegen" {
             return;
         }
 
@@ -1741,6 +1763,10 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
         cmd.arg("--host").arg(&*compiler.host.triple);
         cmd.arg("--llvm-filecheck").arg(builder.llvm_filecheck(builder.config.host_target));
 
+        if let Some(codegen_backend) = builder.config.default_codegen_backend(compiler.host) {
+            cmd.arg("--codegen-backend").arg(&codegen_backend);
+        }
+
         if builder.build.config.llvm_enzyme {
             cmd.arg("--has-enzyme");
         }
@@ -1794,7 +1820,24 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
         }
 
         let mut flags = if is_rustdoc { Vec::new() } else { vec!["-Crpath".to_string()] };
-        flags.push(format!("-Cdebuginfo={}", builder.config.rust_debuginfo_level_tests));
+        flags.push(format!(
+            "-Cdebuginfo={}",
+            if mode == "codegen" {
+                // codegen tests typically check LLVM IR and are sensitive to additional debuginfo.
+                // So do not apply `rust.debuginfo-level-tests` for codegen tests.
+                if builder.config.rust_debuginfo_level_tests
+                    != crate::core::config::DebuginfoLevel::None
+                {
+                    println!(
+                        "NOTE: ignoring `rust.debuginfo-level-tests={}` for codegen tests",
+                        builder.config.rust_debuginfo_level_tests
+                    );
+                }
+                crate::core::config::DebuginfoLevel::None
+            } else {
+                builder.config.rust_debuginfo_level_tests
+            }
+        ));
         flags.extend(builder.config.cmd.compiletest_rustc_args().iter().map(|s| s.to_string()));
 
         if suite != "mir-opt" {
@@ -1812,7 +1855,7 @@ NOTE: if you're sure you want to do this, please open an issue as to why. In the
         }
 
         let mut hostflags = flags.clone();
-        hostflags.extend(linker_flags(builder, compiler.host, LldThreads::No));
+        hostflags.extend(linker_flags(builder, compiler.host, LldThreads::No, compiler.stage));
 
         let mut targetflags = flags;
 
@@ -2929,7 +2972,8 @@ impl Step for RemoteCopyLibs {
 
         builder.info(&format!("REMOTE copy libs to emulator ({target})"));
 
-        let remote_test_server = builder.ensure(tool::RemoteTestServer { compiler, target });
+        let remote_test_server =
+            builder.ensure(tool::RemoteTestServer { build_compiler: compiler, target });
 
         // Spawn the emulator and wait for it to come online
         let tool = builder.tool_exe(Tool::RemoteTestClient);
@@ -3370,7 +3414,7 @@ impl Step for CodegenCranelift {
             cargo
                 .arg("--manifest-path")
                 .arg(builder.src.join("compiler/rustc_codegen_cranelift/build_system/Cargo.toml"));
-            compile::rustc_cargo_env(builder, &mut cargo, target, compiler.stage);
+            compile::rustc_cargo_env(builder, &mut cargo, target);
 
             // Avoid incremental cache issues when changing rustc
             cargo.env("CARGO_BUILD_INCREMENTAL", "false");
@@ -3502,7 +3546,7 @@ impl Step for CodegenGCC {
             cargo
                 .arg("--manifest-path")
                 .arg(builder.src.join("compiler/rustc_codegen_gcc/build_system/Cargo.toml"));
-            compile::rustc_cargo_env(builder, &mut cargo, target, compiler.stage);
+            compile::rustc_cargo_env(builder, &mut cargo, target);
             add_cg_gcc_cargo_flags(&mut cargo, &gcc);
 
             // Avoid incremental cache issues when changing rustc
diff --git a/src/bootstrap/src/core/build_steps/tool.rs b/src/bootstrap/src/core/build_steps/tool.rs
index b05b34b9b22..f5fa33b98f3 100644
--- a/src/bootstrap/src/core/build_steps/tool.rs
+++ b/src/bootstrap/src/core/build_steps/tool.rs
@@ -9,6 +9,7 @@
 //! Each Rust tool **MUST** utilize `ToolBuild` inside their `Step` logic,
 //! return `ToolBuildResult` and should never prepare `cargo` invocations manually.
 
+use std::ffi::OsStr;
 use std::path::PathBuf;
 use std::{env, fs};
 
@@ -41,7 +42,8 @@ pub enum ToolArtifactKind {
 
 #[derive(Debug, Clone, Hash, PartialEq, Eq)]
 struct ToolBuild {
-    compiler: Compiler,
+    /// Compiler that will build this tool.
+    build_compiler: Compiler,
     target: TargetSelection,
     tool: &'static str,
     path: &'static str,
@@ -111,53 +113,40 @@ impl Step for ToolBuild {
         let mut tool = self.tool;
         let path = self.path;
 
-        let target_compiler = self.compiler;
-        self.compiler = if self.mode == Mode::ToolRustc {
-            get_tool_rustc_compiler(builder, self.compiler)
+        let target_compiler = self.build_compiler;
+        self.build_compiler = if self.mode == Mode::ToolRustc {
+            get_tool_rustc_compiler(builder, self.build_compiler)
         } else {
-            self.compiler
+            self.build_compiler
         };
 
         match self.mode {
             Mode::ToolRustc => {
                 // If compiler was forced, its artifacts should have been prepared earlier.
-                if !self.compiler.is_forced_compiler() {
-                    builder.std(self.compiler, self.compiler.host);
-                    builder.ensure(compile::Rustc::new(self.compiler, target));
+                if !self.build_compiler.is_forced_compiler() {
+                    builder.std(self.build_compiler, self.build_compiler.host);
+                    builder.ensure(compile::Rustc::new(self.build_compiler, target));
                 }
             }
             Mode::ToolStd => {
                 // If compiler was forced, its artifacts should have been prepared earlier.
-                if !self.compiler.is_forced_compiler() {
-                    builder.std(self.compiler, target)
+                if !self.build_compiler.is_forced_compiler() {
+                    builder.std(self.build_compiler, target);
                 }
             }
-            Mode::ToolBootstrap => {} // uses downloaded stage0 compiler libs
+            Mode::ToolBootstrap | Mode::ToolTarget => {} // uses downloaded stage0 compiler libs
             _ => panic!("unexpected Mode for tool build"),
         }
 
-        // build.tool.TOOL_NAME.features in bootstrap.toml allows specifying which features to
-        // enable for a specific tool. `extra_features` instead is not controlled by the toml and
-        // provides features that are always enabled for a specific tool (e.g. "in-rust-tree" for
-        // rust-analyzer). Finally, `prepare_tool_cargo` might add more features to adapt the build
-        // to the chosen flags (e.g. "all-static" for cargo if `cargo_native_static` is true).
-        let mut features = builder
-            .config
-            .tool
-            .get(self.tool)
-            .and_then(|tool| tool.features.clone())
-            .unwrap_or_default();
-        features.extend(self.extra_features.clone());
-
         let mut cargo = prepare_tool_cargo(
             builder,
-            self.compiler,
+            self.build_compiler,
             self.mode,
             target,
             Kind::Build,
             path,
             self.source_type,
-            &features,
+            &self.extra_features,
         );
 
         // The stage0 compiler changes infrequently and does not directly depend on code
@@ -173,7 +162,7 @@ impl Step for ToolBuild {
 
         // Rustc tools (miri, clippy, cargo, rustfmt, rust-analyzer)
         // could use the additional optimizations.
-        if self.mode == Mode::ToolRustc && is_lto_stage(&self.compiler) {
+        if self.mode == Mode::ToolRustc && is_lto_stage(&self.build_compiler) {
             let lto = match builder.config.rust_lto {
                 RustcLto::Off => Some("off"),
                 RustcLto::Thin => Some("thin"),
@@ -195,8 +184,9 @@ impl Step for ToolBuild {
             Kind::Build,
             self.mode,
             self.tool,
-            self.compiler.stage,
-            &self.compiler.host,
+            // A stage N tool is built with the stage N-1 compiler.
+            self.build_compiler.stage + 1,
+            &self.build_compiler.host,
             &self.target,
         );
 
@@ -219,14 +209,14 @@ impl Step for ToolBuild {
             }
             let tool_path = match self.artifact_kind {
                 ToolArtifactKind::Binary => {
-                    copy_link_tool_bin(builder, self.compiler, self.target, self.mode, tool)
+                    copy_link_tool_bin(builder, self.build_compiler, self.target, self.mode, tool)
                 }
                 ToolArtifactKind::Library => builder
-                    .cargo_out(self.compiler, self.mode, self.target)
+                    .cargo_out(self.build_compiler, self.mode, self.target)
                     .join(format!("lib{tool}.rlib")),
             };
 
-            ToolBuildResult { tool_path, build_compiler: self.compiler, target_compiler }
+            ToolBuildResult { tool_path, build_compiler: self.build_compiler, target_compiler }
         }
     }
 }
@@ -244,7 +234,8 @@ pub fn prepare_tool_cargo(
 ) -> CargoCommand {
     let mut cargo = builder::Cargo::new(builder, compiler, mode, source_type, target, cmd_kind);
 
-    let dir = builder.src.join(path);
+    let path = PathBuf::from(path);
+    let dir = builder.src.join(&path);
     cargo.arg("--manifest-path").arg(dir.join("Cargo.toml"));
 
     let mut features = extra_features.to_vec();
@@ -261,6 +252,18 @@ pub fn prepare_tool_cargo(
         }
     }
 
+    // build.tool.TOOL_NAME.features in bootstrap.toml allows specifying which features to enable
+    // for a specific tool. `extra_features` instead is not controlled by the toml and provides
+    // features that are always enabled for a specific tool (e.g. "in-rust-tree" for rust-analyzer).
+    // Finally, `prepare_tool_cargo` above here might add more features to adapt the build
+    // to the chosen flags (e.g. "all-static" for cargo if `cargo_native_static` is true).
+    builder
+        .config
+        .tool
+        .iter()
+        .filter(|(tool_name, _)| path.file_name().and_then(OsStr::to_str) == Some(tool_name))
+        .for_each(|(_, tool)| features.extend(tool.features.clone().unwrap_or_default()));
+
     // clippy tests need to know about the stage sysroot. Set them consistently while building to
     // avoid rebuilding when running tests.
     cargo.env("SYSROOT", builder.sysroot(compiler));
@@ -364,6 +367,47 @@ pub(crate) fn get_tool_rustc_compiler(
     builder.compiler(target_compiler.stage.saturating_sub(1), builder.config.host_target)
 }
 
+/// Determines how to build a `ToolTarget`, i.e. which compiler should be used to compile it.
+/// The compiler stage is automatically bumped if we need to cross-compile a stage 1 tool.
+pub enum ToolTargetBuildMode {
+    /// Build the tool using rustc that corresponds to the selected CLI stage.
+    Build(TargetSelection),
+    /// Build the tool so that it can be attached to the sysroot of the passed compiler.
+    /// Since we always dist stage 2+, the compiler that builds the tool in this case has to be
+    /// stage 1+.
+    Dist(Compiler),
+}
+
+/// Returns compiler that is able to compile a `ToolTarget` tool with the given `mode`.
+pub(crate) fn get_tool_target_compiler(
+    builder: &Builder<'_>,
+    mode: ToolTargetBuildMode,
+) -> Compiler {
+    let (target, build_compiler_stage) = match mode {
+        ToolTargetBuildMode::Build(target) => {
+            assert!(builder.top_stage > 0);
+            // If we want to build a stage N tool, we need to compile it with stage N-1 rustc
+            (target, builder.top_stage - 1)
+        }
+        ToolTargetBuildMode::Dist(target_compiler) => {
+            assert!(target_compiler.stage > 0);
+            // If we want to dist a stage N rustc, we want to attach stage N tool to it.
+            // And to build that tool, we need to compile it with stage N-1 rustc
+            (target_compiler.host, target_compiler.stage - 1)
+        }
+    };
+
+    let compiler = if builder.host_target == target {
+        builder.compiler(build_compiler_stage, builder.host_target)
+    } else {
+        // If we are cross-compiling a stage 1 tool, we cannot do that with a stage 0 compiler,
+        // so we auto-bump the tool's stage to 2, which means we need a stage 1 compiler.
+        builder.compiler(build_compiler_stage.max(1), builder.host_target)
+    };
+    builder.std(compiler, target);
+    compiler
+}
+
 /// Links a built tool binary with the given `name` from the build directory to the
 /// tools directory.
 fn copy_link_tool_bin(
@@ -450,7 +494,7 @@ macro_rules! bootstrap_tool {
                 let compiletest_wants_stage0 = $tool_name == "compiletest" && builder.config.compiletest_use_stage0_libtest;
 
                 builder.ensure(ToolBuild {
-                    compiler: self.compiler,
+                    build_compiler: self.compiler,
                     target: self.target,
                     tool: $tool_name,
                     mode: if is_unstable && !compiletest_wants_stage0 {
@@ -516,12 +560,10 @@ bootstrap_tool!(
     ReplaceVersionPlaceholder, "src/tools/replace-version-placeholder", "replace-version-placeholder";
     CollectLicenseMetadata, "src/tools/collect-license-metadata", "collect-license-metadata";
     GenerateCopyright, "src/tools/generate-copyright", "generate-copyright";
-    SuggestTests, "src/tools/suggest-tests", "suggest-tests";
     GenerateWindowsSys, "src/tools/generate-windows-sys", "generate-windows-sys";
     // rustdoc-gui-test has a crate dependency on compiletest, so it needs the same unstable features.
     RustdocGUITest, "src/tools/rustdoc-gui-test", "rustdoc-gui-test", is_unstable_tool = true, allow_features = COMPILETEST_ALLOW_FEATURES;
     CoverageDump, "src/tools/coverage-dump", "coverage-dump";
-    WasmComponentLd, "src/tools/wasm-component-ld", "wasm-component-ld", is_unstable_tool = true, allow_features = "min_specialization";
     UnicodeTableGenerator, "src/tools/unicode-table-generator", "unicode-table-generator";
     FeaturesStatusDump, "src/tools/features-status-dump", "features-status-dump";
     OptimizedDist, "src/tools/opt-dist", "opt-dist", submodules = &["src/tools/rustc-perf"];
@@ -560,7 +602,7 @@ impl Step for RustcPerf {
         builder.require_submodule("src/tools/rustc-perf", None);
 
         let tool = ToolBuild {
-            compiler: self.compiler,
+            build_compiler: self.compiler,
             target: self.target,
             tool: "collector",
             mode: Mode::ToolBootstrap,
@@ -576,7 +618,7 @@ impl Step for RustcPerf {
         let res = builder.ensure(tool.clone());
         // We also need to symlink the `rustc-fake` binary to the corresponding directory,
         // because `collector` expects it in the same directory.
-        copy_link_tool_bin(builder, tool.compiler, tool.target, tool.mode, "rustc-fake");
+        copy_link_tool_bin(builder, tool.build_compiler, tool.target, tool.mode, "rustc-fake");
 
         res
     }
@@ -620,7 +662,7 @@ impl Step for ErrorIndex {
 
     fn run(self, builder: &Builder<'_>) -> ToolBuildResult {
         builder.ensure(ToolBuild {
-            compiler: self.compiler,
+            build_compiler: self.compiler,
             target: self.compiler.host,
             tool: "error_index_generator",
             mode: Mode::ToolRustc,
@@ -636,7 +678,7 @@ impl Step for ErrorIndex {
 
 #[derive(Debug, Clone, Hash, PartialEq, Eq)]
 pub struct RemoteTestServer {
-    pub compiler: Compiler,
+    pub build_compiler: Compiler,
     pub target: TargetSelection,
 }
 
@@ -649,17 +691,20 @@ impl Step for RemoteTestServer {
 
     fn make_run(run: RunConfig<'_>) {
         run.builder.ensure(RemoteTestServer {
-            compiler: run.builder.compiler(run.builder.top_stage, run.builder.config.host_target),
+            build_compiler: get_tool_target_compiler(
+                run.builder,
+                ToolTargetBuildMode::Build(run.target),
+            ),
             target: run.target,
         });
     }
 
     fn run(self, builder: &Builder<'_>) -> ToolBuildResult {
         builder.ensure(ToolBuild {
-            compiler: self.compiler,
+            build_compiler: self.build_compiler,
             target: self.target,
             tool: "remote-test-server",
-            mode: Mode::ToolStd,
+            mode: Mode::ToolTarget,
             path: "src/tools/remote-test-server",
             source_type: SourceType::InTree,
             extra_features: Vec::new(),
@@ -668,6 +713,10 @@ impl Step for RemoteTestServer {
             artifact_kind: ToolArtifactKind::Binary,
         })
     }
+
+    fn metadata(&self) -> Option<StepMetadata> {
+        Some(StepMetadata::build("remote-test-server", self.target).built_by(self.build_compiler))
+    }
 }
 
 #[derive(Debug, Clone, Hash, PartialEq, Eq, Ord, PartialOrd)]
@@ -757,7 +806,7 @@ impl Step for Rustdoc {
 
         let ToolBuildResult { tool_path, build_compiler, target_compiler } =
             builder.ensure(ToolBuild {
-                compiler: target_compiler,
+                build_compiler: target_compiler,
                 target,
                 // Cargo adds a number of paths to the dylib search path on windows, which results in
                 // the wrong rustdoc being executed. To avoid the conflicting rustdocs, we name the "tool"
@@ -825,7 +874,7 @@ impl Step for Cargo {
         builder.build.require_submodule("src/tools/cargo", None);
 
         builder.ensure(ToolBuild {
-            compiler: self.compiler,
+            build_compiler: self.compiler,
             target: self.target,
             tool: "cargo",
             mode: Mode::ToolRustc,
@@ -839,17 +888,50 @@ impl Step for Cargo {
     }
 }
 
+/// Represents a built LldWrapper, the `lld-wrapper` tool itself, and a directory
+/// containing a build of LLD.
+#[derive(Clone)]
+pub struct BuiltLldWrapper {
+    tool: ToolBuildResult,
+    lld_dir: PathBuf,
+}
+
 #[derive(Debug, Clone, Hash, PartialEq, Eq)]
 pub struct LldWrapper {
     pub build_compiler: Compiler,
-    pub target_compiler: Compiler,
+    pub target: TargetSelection,
+}
+
+impl LldWrapper {
+    /// Returns `LldWrapper` that should be **used** by the passed compiler.
+    pub fn for_use_by_compiler(builder: &Builder<'_>, target_compiler: Compiler) -> Self {
+        Self {
+            build_compiler: get_tool_target_compiler(
+                builder,
+                ToolTargetBuildMode::Dist(target_compiler),
+            ),
+            target: target_compiler.host,
+        }
+    }
 }
 
 impl Step for LldWrapper {
-    type Output = ToolBuildResult;
+    type Output = BuiltLldWrapper;
+
+    const ONLY_HOSTS: bool = true;
 
     fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
-        run.never()
+        run.path("src/tools/lld-wrapper")
+    }
+
+    fn make_run(run: RunConfig<'_>) {
+        run.builder.ensure(LldWrapper {
+            build_compiler: get_tool_target_compiler(
+                run.builder,
+                ToolTargetBuildMode::Build(run.target),
+            ),
+            target: run.target,
+        });
     }
 
     #[cfg_attr(
@@ -858,25 +940,16 @@ impl Step for LldWrapper {
             level = "debug",
             name = "LldWrapper::run",
             skip_all,
-            fields(build_compiler = ?self.build_compiler, target_compiler = ?self.target_compiler),
+            fields(build_compiler = ?self.build_compiler),
         ),
     )]
-    fn run(self, builder: &Builder<'_>) -> ToolBuildResult {
-        if builder.config.dry_run() {
-            return ToolBuildResult {
-                tool_path: Default::default(),
-                build_compiler: self.build_compiler,
-                target_compiler: self.target_compiler,
-            };
-        }
-
-        let target = self.target_compiler.host;
-
-        let tool_result = builder.ensure(ToolBuild {
-            compiler: self.build_compiler,
-            target,
+    fn run(self, builder: &Builder<'_>) -> Self::Output {
+        let lld_dir = builder.ensure(llvm::Lld { target: self.target });
+        let tool = builder.ensure(ToolBuild {
+            build_compiler: self.build_compiler,
+            target: self.target,
             tool: "lld-wrapper",
-            mode: Mode::ToolStd,
+            mode: Mode::ToolTarget,
             path: "src/tools/lld-wrapper",
             source_type: SourceType::InTree,
             extra_features: Vec::new(),
@@ -884,31 +957,110 @@ impl Step for LldWrapper {
             cargo_args: Vec::new(),
             artifact_kind: ToolArtifactKind::Binary,
         });
+        BuiltLldWrapper { tool, lld_dir }
+    }
+
+    fn metadata(&self) -> Option<StepMetadata> {
+        Some(StepMetadata::build("LldWrapper", self.target).built_by(self.build_compiler))
+    }
+}
+
+pub(crate) fn copy_lld_artifacts(
+    builder: &Builder<'_>,
+    lld_wrapper: BuiltLldWrapper,
+    target_compiler: Compiler,
+) {
+    let target = target_compiler.host;
+
+    let libdir_bin = builder.sysroot_target_bindir(target_compiler, target);
+    t!(fs::create_dir_all(&libdir_bin));
 
-        let libdir_bin = builder.sysroot_target_bindir(self.target_compiler, target);
-        t!(fs::create_dir_all(&libdir_bin));
+    let src_exe = exe("lld", target);
+    let dst_exe = exe("rust-lld", target);
 
-        let lld_install = builder.ensure(llvm::Lld { target });
-        let src_exe = exe("lld", target);
-        let dst_exe = exe("rust-lld", target);
+    builder.copy_link(
+        &lld_wrapper.lld_dir.join("bin").join(src_exe),
+        &libdir_bin.join(dst_exe),
+        FileType::Executable,
+    );
+    let self_contained_lld_dir = libdir_bin.join("gcc-ld");
+    t!(fs::create_dir_all(&self_contained_lld_dir));
 
+    for name in crate::LLD_FILE_NAMES {
         builder.copy_link(
-            &lld_install.join("bin").join(src_exe),
-            &libdir_bin.join(dst_exe),
+            &lld_wrapper.tool.tool_path,
+            &self_contained_lld_dir.join(exe(name, target)),
             FileType::Executable,
         );
-        let self_contained_lld_dir = libdir_bin.join("gcc-ld");
-        t!(fs::create_dir_all(&self_contained_lld_dir));
-
-        for name in crate::LLD_FILE_NAMES {
-            builder.copy_link(
-                &tool_result.tool_path,
-                &self_contained_lld_dir.join(exe(name, target)),
-                FileType::Executable,
-            );
+    }
+}
+
+/// Builds the `wasm-component-ld` linker wrapper, which is shipped with rustc to be executed on the
+/// host platform where rustc runs.
+#[derive(Debug, Clone, Hash, PartialEq, Eq)]
+pub struct WasmComponentLd {
+    build_compiler: Compiler,
+    target: TargetSelection,
+}
+
+impl WasmComponentLd {
+    /// Returns `WasmComponentLd` that should be **used** by the passed compiler.
+    pub fn for_use_by_compiler(builder: &Builder<'_>, target_compiler: Compiler) -> Self {
+        Self {
+            build_compiler: get_tool_target_compiler(
+                builder,
+                ToolTargetBuildMode::Dist(target_compiler),
+            ),
+            target: target_compiler.host,
         }
+    }
+}
+
+impl Step for WasmComponentLd {
+    type Output = ToolBuildResult;
+
+    const ONLY_HOSTS: bool = true;
+
+    fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
+        run.path("src/tools/wasm-component-ld")
+    }
+
+    fn make_run(run: RunConfig<'_>) {
+        run.builder.ensure(WasmComponentLd {
+            build_compiler: get_tool_target_compiler(
+                run.builder,
+                ToolTargetBuildMode::Build(run.target),
+            ),
+            target: run.target,
+        });
+    }
+
+    #[cfg_attr(
+        feature = "tracing",
+        instrument(
+            level = "debug",
+            name = "WasmComponentLd::run",
+            skip_all,
+            fields(build_compiler = ?self.build_compiler),
+        ),
+    )]
+    fn run(self, builder: &Builder<'_>) -> ToolBuildResult {
+        builder.ensure(ToolBuild {
+            build_compiler: self.build_compiler,
+            target: self.target,
+            tool: "wasm-component-ld",
+            mode: Mode::ToolTarget,
+            path: "src/tools/wasm-component-ld",
+            source_type: SourceType::InTree,
+            extra_features: vec![],
+            allow_features: "",
+            cargo_args: vec![],
+            artifact_kind: ToolArtifactKind::Binary,
+        })
+    }
 
-        tool_result
+    fn metadata(&self) -> Option<StepMetadata> {
+        Some(StepMetadata::build("WasmComponentLd", self.target).built_by(self.build_compiler))
     }
 }
 
@@ -941,7 +1093,7 @@ impl Step for RustAnalyzer {
 
     fn run(self, builder: &Builder<'_>) -> ToolBuildResult {
         builder.ensure(ToolBuild {
-            compiler: self.compiler,
+            build_compiler: self.compiler,
             target: self.target,
             tool: "rust-analyzer",
             mode: Mode::ToolRustc,
@@ -986,7 +1138,7 @@ impl Step for RustAnalyzerProcMacroSrv {
 
     fn run(self, builder: &Builder<'_>) -> Option<ToolBuildResult> {
         let tool_result = builder.ensure(ToolBuild {
-            compiler: self.compiler,
+            build_compiler: self.compiler,
             target: self.target,
             tool: "rust-analyzer-proc-macro-srv",
             mode: Mode::ToolRustc,
@@ -1014,9 +1166,35 @@ impl Step for RustAnalyzerProcMacroSrv {
 
 #[derive(Debug, Clone, Hash, PartialEq, Eq)]
 pub struct LlvmBitcodeLinker {
-    pub compiler: Compiler,
-    pub target: TargetSelection,
-    pub extra_features: Vec<String>,
+    build_compiler: Compiler,
+    target: TargetSelection,
+}
+
+impl LlvmBitcodeLinker {
+    /// Returns `LlvmBitcodeLinker` that will be **compiled** by the passed compiler, for the given
+    /// `target`.
+    pub fn from_build_compiler(build_compiler: Compiler, target: TargetSelection) -> Self {
+        Self { build_compiler, target }
+    }
+
+    /// Returns `LlvmBitcodeLinker` that should be **used** by the passed compiler.
+    pub fn from_target_compiler(builder: &Builder<'_>, target_compiler: Compiler) -> Self {
+        Self {
+            build_compiler: get_tool_target_compiler(
+                builder,
+                ToolTargetBuildMode::Dist(target_compiler),
+            ),
+            target: target_compiler.host,
+        }
+    }
+
+    /// Return a compiler that is able to build this tool for the given `target`.
+    pub fn get_build_compiler_for_target(
+        builder: &Builder<'_>,
+        target: TargetSelection,
+    ) -> Compiler {
+        get_tool_target_compiler(builder, ToolTargetBuildMode::Build(target))
+    }
 }
 
 impl Step for LlvmBitcodeLinker {
@@ -1032,8 +1210,7 @@ impl Step for LlvmBitcodeLinker {
 
     fn make_run(run: RunConfig<'_>) {
         run.builder.ensure(LlvmBitcodeLinker {
-            compiler: run.builder.compiler(run.builder.top_stage, run.builder.config.host_target),
-            extra_features: Vec::new(),
+            build_compiler: Self::get_build_compiler_for_target(run.builder, run.target),
             target: run.target,
         });
     }
@@ -1043,35 +1220,22 @@ impl Step for LlvmBitcodeLinker {
         instrument(level = "debug", name = "LlvmBitcodeLinker::run", skip_all)
     )]
     fn run(self, builder: &Builder<'_>) -> ToolBuildResult {
-        let tool_result = builder.ensure(ToolBuild {
-            compiler: self.compiler,
+        builder.ensure(ToolBuild {
+            build_compiler: self.build_compiler,
             target: self.target,
             tool: "llvm-bitcode-linker",
-            mode: Mode::ToolRustc,
+            mode: Mode::ToolTarget,
             path: "src/tools/llvm-bitcode-linker",
             source_type: SourceType::InTree,
-            extra_features: self.extra_features,
+            extra_features: vec![],
             allow_features: "",
             cargo_args: Vec::new(),
             artifact_kind: ToolArtifactKind::Binary,
-        });
+        })
+    }
 
-        if tool_result.target_compiler.stage > 0 {
-            let bindir_self_contained = builder
-                .sysroot(tool_result.target_compiler)
-                .join(format!("lib/rustlib/{}/bin/self-contained", self.target.triple));
-            t!(fs::create_dir_all(&bindir_self_contained));
-            let bin_destination = bindir_self_contained
-                .join(exe("llvm-bitcode-linker", tool_result.target_compiler.host));
-            builder.copy_link(&tool_result.tool_path, &bin_destination, FileType::Executable);
-            ToolBuildResult {
-                tool_path: bin_destination,
-                build_compiler: tool_result.build_compiler,
-                target_compiler: tool_result.target_compiler,
-            }
-        } else {
-            tool_result
-        }
+    fn metadata(&self) -> Option<StepMetadata> {
+        Some(StepMetadata::build("LlvmBitcodeLinker", self.target).built_by(self.build_compiler))
     }
 }
 
@@ -1146,6 +1310,7 @@ macro_rules! tool_extended {
             stable: $stable:expr
             $( , add_bins_to_sysroot: $add_bins_to_sysroot:expr )?
             $( , add_features: $add_features:expr )?
+            $( , cargo_args: $cargo_args:expr )?
             $( , )?
         }
     ) => {
@@ -1186,6 +1351,7 @@ macro_rules! tool_extended {
                     $path,
                     None $( .or(Some(&$add_bins_to_sysroot)) )?,
                     None $( .or(Some($add_features)) )?,
+                    None $( .or(Some($cargo_args)) )?,
                 )
             }
 
@@ -1225,6 +1391,7 @@ fn should_run_tool_build_step<'a>(
     )
 }
 
+#[expect(clippy::too_many_arguments)] // silence overeager clippy lint
 fn run_tool_build_step(
     builder: &Builder<'_>,
     compiler: Compiler,
@@ -1233,6 +1400,7 @@ fn run_tool_build_step(
     path: &'static str,
     add_bins_to_sysroot: Option<&[&str]>,
     add_features: Option<fn(&Builder<'_>, TargetSelection, &mut Vec<String>)>,
+    cargo_args: Option<&[&'static str]>,
 ) -> ToolBuildResult {
     let mut extra_features = Vec::new();
     if let Some(func) = add_features {
@@ -1241,7 +1409,7 @@ fn run_tool_build_step(
 
     let ToolBuildResult { tool_path, build_compiler, target_compiler } =
         builder.ensure(ToolBuild {
-            compiler,
+            build_compiler: compiler,
             target,
             tool: tool_name,
             mode: Mode::ToolRustc,
@@ -1249,7 +1417,7 @@ fn run_tool_build_step(
             extra_features,
             source_type: SourceType::InTree,
             allow_features: "",
-            cargo_args: vec![],
+            cargo_args: cargo_args.unwrap_or_default().iter().map(|s| String::from(*s)).collect(),
             artifact_kind: ToolArtifactKind::Binary,
         });
 
@@ -1300,7 +1468,9 @@ tool_extended!(Miri {
     path: "src/tools/miri",
     tool_name: "miri",
     stable: false,
-    add_bins_to_sysroot: ["miri"]
+    add_bins_to_sysroot: ["miri"],
+    // Always compile also tests when building miri. Otherwise feature unification can cause rebuilds between building and testing miri.
+    cargo_args: &["--all-targets"],
 });
 tool_extended!(CargoMiri {
     path: "src/tools/miri/cargo-miri",
@@ -1338,7 +1508,7 @@ impl Step for TestFloatParse {
         let compiler = builder.compiler(builder.top_stage, bootstrap_host);
 
         builder.ensure(ToolBuild {
-            compiler,
+            build_compiler: compiler,
             target: bootstrap_host,
             tool: "test-float-parse",
             mode: Mode::ToolStd,
diff --git a/src/bootstrap/src/core/builder/cargo.rs b/src/bootstrap/src/core/builder/cargo.rs
index deb7106f185..badd5f24dba 100644
--- a/src/bootstrap/src/core/builder/cargo.rs
+++ b/src/bootstrap/src/core/builder/cargo.rs
@@ -113,9 +113,9 @@ impl Cargo {
 
         match cmd_kind {
             // No need to configure the target linker for these command types.
-            Kind::Clean | Kind::Check | Kind::Suggest | Kind::Format | Kind::Setup => {}
+            Kind::Clean | Kind::Check | Kind::Format | Kind::Setup => {}
             _ => {
-                cargo.configure_linker(builder);
+                cargo.configure_linker(builder, mode);
             }
         }
 
@@ -209,7 +209,7 @@ impl Cargo {
 
     // FIXME(onur-ozkan): Add coverage to make sure modifications to this function
     // doesn't cause cache invalidations (e.g., #130108).
-    fn configure_linker(&mut self, builder: &Builder<'_>) -> &mut Cargo {
+    fn configure_linker(&mut self, builder: &Builder<'_>, mode: Mode) -> &mut Cargo {
         let target = self.target;
         let compiler = self.compiler;
 
@@ -264,7 +264,12 @@ impl Cargo {
             }
         }
 
-        for arg in linker_args(builder, compiler.host, LldThreads::Yes) {
+        // We use the snapshot compiler when building host code (build scripts/proc macros) of
+        // `Mode::Std` tools, so we need to determine the current stage here to pass the proper
+        // linker args (e.g. -C vs -Z).
+        // This should stay synchronized with the [cargo] function.
+        let host_stage = if mode == Mode::Std { 0 } else { compiler.stage };
+        for arg in linker_args(builder, compiler.host, LldThreads::Yes, host_stage) {
             self.hostflags.arg(&arg);
         }
 
@@ -274,10 +279,10 @@ impl Cargo {
         }
         // We want to set -Clinker using Cargo, therefore we only call `linker_flags` and not
         // `linker_args` here.
-        for flag in linker_flags(builder, target, LldThreads::Yes) {
+        for flag in linker_flags(builder, target, LldThreads::Yes, compiler.stage) {
             self.rustflags.arg(&flag);
         }
-        for arg in linker_args(builder, target, LldThreads::Yes) {
+        for arg in linker_args(builder, target, LldThreads::Yes, compiler.stage) {
             self.rustdocflags.arg(&arg);
         }
 
@@ -532,7 +537,7 @@ impl Builder<'_> {
             }
         }
 
-        let stage = if compiler.stage == 0 && self.local_rebuild {
+        let build_compiler_stage = if compiler.stage == 0 && self.local_rebuild {
             // Assume the local-rebuild rustc already has stage1 features.
             1
         } else {
@@ -540,15 +545,17 @@ impl Builder<'_> {
         };
 
         // We synthetically interpret a stage0 compiler used to build tools as a
-        // "raw" compiler in that it's the exact snapshot we download. Normally
-        // the stage0 build means it uses libraries build by the stage0
-        // compiler, but for tools we just use the precompiled libraries that
-        // we've downloaded
-        let use_snapshot = mode == Mode::ToolBootstrap;
-        assert!(!use_snapshot || stage == 0 || self.local_rebuild);
-
-        let maybe_sysroot = self.sysroot(compiler);
-        let sysroot = if use_snapshot { self.rustc_snapshot_sysroot() } else { &maybe_sysroot };
+        // "raw" compiler in that it's the exact snapshot we download. For things like
+        // ToolRustc, we would have to use the artificial stage0-sysroot compiler instead.
+        let use_snapshot =
+            mode == Mode::ToolBootstrap || (mode == Mode::ToolTarget && build_compiler_stage == 0);
+        assert!(!use_snapshot || build_compiler_stage == 0 || self.local_rebuild);
+
+        let sysroot = if use_snapshot {
+            self.rustc_snapshot_sysroot().to_path_buf()
+        } else {
+            self.sysroot(compiler)
+        };
         let libdir = self.rustc_libdir(compiler);
 
         let sysroot_str = sysroot.as_os_str().to_str().expect("sysroot should be UTF-8");
@@ -557,7 +564,7 @@ impl Builder<'_> {
         }
 
         let mut rustflags = Rustflags::new(target);
-        if stage != 0 {
+        if build_compiler_stage != 0 {
             if let Ok(s) = env::var("CARGOFLAGS_NOT_BOOTSTRAP") {
                 cargo.args(s.split_whitespace());
             }
@@ -599,7 +606,7 @@ impl Builder<'_> {
         // sysroot. Passing this cfg enables raw-dylib support instead, which makes the native
         // library unnecessary. This can be removed when windows-rs enables raw-dylib
         // unconditionally.
-        if let Mode::Rustc | Mode::ToolRustc | Mode::ToolBootstrap = mode {
+        if let Mode::Rustc | Mode::ToolRustc | Mode::ToolBootstrap | Mode::ToolTarget = mode {
             rustflags.arg("--cfg=windows_raw_dylib");
         }
 
@@ -652,7 +659,7 @@ impl Builder<'_> {
         // FIXME(rust-lang/cargo#5754) we shouldn't be using special command arguments
         // to the host invocation here, but rather Cargo should know what flags to pass rustc
         // itself.
-        if stage == 0 {
+        if build_compiler_stage == 0 {
             hostflags.arg("--cfg=bootstrap");
         }
 
@@ -661,7 +668,7 @@ impl Builder<'_> {
         // #71458.
         let mut rustdocflags = rustflags.clone();
         rustdocflags.propagate_cargo_env("RUSTDOCFLAGS");
-        if stage == 0 {
+        if build_compiler_stage == 0 {
             rustdocflags.env("RUSTDOCFLAGS_BOOTSTRAP");
         } else {
             rustdocflags.env("RUSTDOCFLAGS_NOT_BOOTSTRAP");
@@ -672,7 +679,7 @@ impl Builder<'_> {
         }
 
         match mode {
-            Mode::Std | Mode::ToolBootstrap | Mode::ToolStd => {}
+            Mode::Std | Mode::ToolBootstrap | Mode::ToolStd | Mode::ToolTarget => {}
             Mode::Rustc | Mode::Codegen | Mode::ToolRustc => {
                 // Build proc macros both for the host and the target unless proc-macros are not
                 // supported by the target.
@@ -714,7 +721,7 @@ impl Builder<'_> {
         // feature on the rustc side.
         cargo.arg("-Zbinary-dep-depinfo");
         let allow_features = match mode {
-            Mode::ToolBootstrap | Mode::ToolStd => {
+            Mode::ToolBootstrap | Mode::ToolStd | Mode::ToolTarget => {
                 // Restrict the allowed features so we don't depend on nightly
                 // accidentally.
                 //
@@ -742,6 +749,12 @@ impl Builder<'_> {
         // Make cargo emit diagnostics relative to the rustc src dir.
         cargo.arg(format!("-Zroot-dir={}", self.src.display()));
 
+        if self.config.compile_time_deps {
+            // Build only build scripts and proc-macros for rust-analyzer when requested.
+            cargo.arg("-Zunstable-options");
+            cargo.arg("--compile-time-deps");
+        }
+
         // FIXME: Temporary fix for https://github.com/rust-lang/cargo/issues/3005
         // Force cargo to output binaries with disambiguating hashes in the name
         let mut metadata = if compiler.stage == 0 {
@@ -822,7 +835,7 @@ impl Builder<'_> {
         cargo
             .env("RUSTBUILD_NATIVE_DIR", self.native_dir(target))
             .env("RUSTC_REAL", self.rustc(compiler))
-            .env("RUSTC_STAGE", stage.to_string())
+            .env("RUSTC_STAGE", build_compiler_stage.to_string())
             .env("RUSTC_SYSROOT", sysroot)
             .env("RUSTC_LIBDIR", libdir)
             .env("RUSTDOC", self.bootstrap_out.join("rustdoc"))
@@ -867,7 +880,7 @@ impl Builder<'_> {
         let debuginfo_level = match mode {
             Mode::Rustc | Mode::Codegen => self.config.rust_debuginfo_level_rustc,
             Mode::Std => self.config.rust_debuginfo_level_std,
-            Mode::ToolBootstrap | Mode::ToolStd | Mode::ToolRustc => {
+            Mode::ToolBootstrap | Mode::ToolStd | Mode::ToolRustc | Mode::ToolTarget => {
                 self.config.rust_debuginfo_level_tools
             }
         };
@@ -879,11 +892,10 @@ impl Builder<'_> {
             profile_var("DEBUG_ASSERTIONS"),
             match mode {
                 Mode::Std => self.config.std_debug_assertions,
-                Mode::Rustc => self.config.rustc_debug_assertions,
-                Mode::Codegen => self.config.rustc_debug_assertions,
-                Mode::ToolBootstrap => self.config.tools_debug_assertions,
-                Mode::ToolStd => self.config.tools_debug_assertions,
-                Mode::ToolRustc => self.config.tools_debug_assertions,
+                Mode::Rustc | Mode::Codegen => self.config.rustc_debug_assertions,
+                Mode::ToolBootstrap | Mode::ToolStd | Mode::ToolRustc | Mode::ToolTarget => {
+                    self.config.tools_debug_assertions
+                }
             }
             .to_string(),
         );
@@ -954,7 +966,11 @@ impl Builder<'_> {
                     cargo.env("CFG_VIRTUAL_RUSTC_DEV_SOURCE_BASE_DIR", map_to);
                 }
             }
-            Mode::Std | Mode::ToolBootstrap | Mode::ToolRustc | Mode::ToolStd => {
+            Mode::Std
+            | Mode::ToolBootstrap
+            | Mode::ToolRustc
+            | Mode::ToolStd
+            | Mode::ToolTarget => {
                 if let Some(ref map_to) =
                     self.build.debuginfo_map_to(GitRepo::Rustc, RemapScheme::NonCompiler)
                 {
@@ -1269,7 +1285,7 @@ impl Builder<'_> {
             };
 
             if let Some(limit) = limit
-                && (stage == 0
+                && (build_compiler_stage == 0
                     || self.config.default_codegen_backend(target).unwrap_or_default() == "llvm")
             {
                 rustflags.arg(&format!("-Cllvm-args=-import-instr-limit={limit}"));
diff --git a/src/bootstrap/src/core/builder/mod.rs b/src/bootstrap/src/core/builder/mod.rs
index b96a988cde3..923c3a9a935 100644
--- a/src/bootstrap/src/core/builder/mod.rs
+++ b/src/bootstrap/src/core/builder/mod.rs
@@ -146,6 +146,8 @@ pub struct StepMetadata {
     target: TargetSelection,
     built_by: Option<Compiler>,
     stage: Option<u32>,
+    /// Additional opaque string printed in the metadata
+    metadata: Option<String>,
 }
 
 impl StepMetadata {
@@ -170,7 +172,7 @@ impl StepMetadata {
     }
 
     fn new(name: &'static str, target: TargetSelection, kind: Kind) -> Self {
-        Self { name, kind, target, built_by: None, stage: None }
+        Self { name, kind, target, built_by: None, stage: None, metadata: None }
     }
 
     pub fn built_by(mut self, compiler: Compiler) -> Self {
@@ -183,6 +185,11 @@ impl StepMetadata {
         self
     }
 
+    pub fn with_metadata(mut self, metadata: String) -> Self {
+        self.metadata = Some(metadata);
+        self
+    }
+
     pub fn get_stage(&self) -> Option<u32> {
         self.stage.or(self
             .built_by
@@ -404,8 +411,8 @@ const PATH_REMAP: &[(&str, &[&str])] = &[
         "tests",
         &[
             // tidy-alphabetical-start
-            "tests/assembly",
-            "tests/codegen",
+            "tests/assembly-llvm",
+            "tests/codegen-llvm",
             "tests/codegen-units",
             "tests/coverage",
             "tests/coverage-run-rustdoc",
@@ -838,7 +845,6 @@ pub enum Kind {
     #[value(alias = "r")]
     Run,
     Setup,
-    Suggest,
     Vendor,
     Perf,
 }
@@ -862,7 +868,6 @@ impl Kind {
             Kind::Install => "install",
             Kind::Run => "run",
             Kind::Setup => "setup",
-            Kind::Suggest => "suggest",
             Kind::Vendor => "vendor",
             Kind::Perf => "perf",
         }
@@ -874,7 +879,6 @@ impl Kind {
             Kind::Bench => "Benchmarking",
             Kind::Doc => "Documenting",
             Kind::Run => "Running",
-            Kind::Suggest => "Suggesting",
             Kind::Clippy => "Linting",
             Kind::Perf => "Profiling & benchmarking",
             _ => {
@@ -959,6 +963,7 @@ impl<'a> Builder<'a> {
                 tool::RemoteTestServer,
                 tool::RemoteTestClient,
                 tool::RustInstaller,
+                tool::FeaturesStatusDump,
                 tool::Cargo,
                 tool::RustAnalyzer,
                 tool::RustAnalyzerProcMacroSrv,
@@ -980,6 +985,8 @@ impl<'a> Builder<'a> {
                 tool::CoverageDump,
                 tool::LlvmBitcodeLinker,
                 tool::RustcPerf,
+                tool::WasmComponentLd,
+                tool::LldWrapper
             ),
             Kind::Clippy => describe!(
                 clippy::Std,
@@ -1037,13 +1044,14 @@ impl<'a> Builder<'a> {
             Kind::Test => describe!(
                 crate::core::build_steps::toolstate::ToolStateCheck,
                 test::Tidy,
+                test::Bootstrap,
                 test::Ui,
                 test::Crashes,
                 test::Coverage,
                 test::MirOpt,
-                test::Codegen,
+                test::CodegenLlvm,
                 test::CodegenUnits,
-                test::Assembly,
+                test::AssemblyLlvm,
                 test::Incremental,
                 test::Debuginfo,
                 test::UiFullDeps,
@@ -1091,8 +1099,6 @@ impl<'a> Builder<'a> {
                 test::RustInstaller,
                 test::TestFloatParse,
                 test::CollectLicenseMetadata,
-                // Run bootstrap close to the end as it's unlikely to fail
-                test::Bootstrap,
                 // Run run-make last, since these won't pass without make on Windows
                 test::RunMake,
             ),
@@ -1195,7 +1201,7 @@ impl<'a> Builder<'a> {
             Kind::Clean => describe!(clean::CleanAll, clean::Rustc, clean::Std),
             Kind::Vendor => describe!(vendor::Vendor),
             // special-cased in Build::build()
-            Kind::Format | Kind::Suggest | Kind::Perf => vec![],
+            Kind::Format | Kind::Perf => vec![],
             Kind::MiriTest | Kind::MiriSetup => unreachable!(),
         }
     }
@@ -1263,7 +1269,6 @@ impl<'a> Builder<'a> {
             Subcommand::Run { .. } => (Kind::Run, &paths[..]),
             Subcommand::Clean { .. } => (Kind::Clean, &paths[..]),
             Subcommand::Format { .. } => (Kind::Format, &[][..]),
-            Subcommand::Suggest { .. } => (Kind::Suggest, &[][..]),
             Subcommand::Setup { profile: ref path } => (
                 Kind::Setup,
                 path.as_ref().map_or([].as_slice(), |path| std::slice::from_ref(path)),
@@ -1599,7 +1604,7 @@ You have to build a stage1 compiler for `{}` first, and then use it to build a s
             cmd.arg("-Dwarnings");
         }
         cmd.arg("-Znormalize-docs");
-        cmd.args(linker_args(self, compiler.host, LldThreads::Yes));
+        cmd.args(linker_args(self, compiler.host, LldThreads::Yes, compiler.stage));
         cmd
     }
 
diff --git a/src/bootstrap/src/core/builder/tests.rs b/src/bootstrap/src/core/builder/tests.rs
index 1d5690a8197..6ea5d4e6553 100644
--- a/src/bootstrap/src/core/builder/tests.rs
+++ b/src/bootstrap/src/core/builder/tests.rs
@@ -637,11 +637,12 @@ mod snapshot {
 
     use crate::core::build_steps::{compile, dist, doc, test, tool};
     use crate::core::builder::tests::{
-        TEST_TRIPLE_1, TEST_TRIPLE_2, TEST_TRIPLE_3, configure, configure_with_args, first,
-        host_target, render_steps, run_build,
+        RenderConfig, TEST_TRIPLE_1, TEST_TRIPLE_2, TEST_TRIPLE_3, configure, configure_with_args,
+        first, host_target, render_steps, run_build,
     };
     use crate::core::builder::{Builder, Kind, StepDescription, StepMetadata};
     use crate::core::config::TargetSelection;
+    use crate::core::config::toml::rust::with_lld_opt_in_targets;
     use crate::utils::cache::Cache;
     use crate::utils::helpers::get_host_target;
     use crate::utils::tests::{ConfigBuilder, TestCtx};
@@ -712,7 +713,11 @@ mod snapshot {
         [build] llvm <host>
         [build] rustc 0 <host> -> rustc 1 <host>
         ");
+    }
 
+    #[test]
+    fn build_rustc_no_explicit_stage() {
+        let ctx = TestCtx::new();
         insta::assert_snapshot!(
             ctx.config("build")
                 .path("rustc")
@@ -758,6 +763,58 @@ mod snapshot {
     }
 
     #[test]
+    fn build_compiler_tools() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx
+                .config("build")
+                .stage(2)
+                .args(&["--set", "rust.lld=true", "--set", "rust.llvm-bitcode-linker=true"])
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustc 0 <host> -> LldWrapper 1 <host>
+        [build] rustc 0 <host> -> LlvmBitcodeLinker 1 <host>
+        [build] rustc 1 <host> -> std 1 <host>
+        [build] rustc 1 <host> -> rustc 2 <host>
+        [build] rustc 1 <host> -> LldWrapper 2 <host>
+        [build] rustc 1 <host> -> LlvmBitcodeLinker 2 <host>
+        [build] rustc 2 <host> -> std 2 <host>
+        [build] rustdoc 1 <host>
+        "
+        );
+    }
+
+    #[test]
+    fn build_compiler_tools_cross() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx
+                .config("build")
+                .stage(2)
+                .args(&["--set", "rust.lld=true", "--set", "rust.llvm-bitcode-linker=true"])
+                .hosts(&[TEST_TRIPLE_1])
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustc 0 <host> -> LldWrapper 1 <host>
+        [build] rustc 0 <host> -> LlvmBitcodeLinker 1 <host>
+        [build] rustc 1 <host> -> std 1 <host>
+        [build] rustc 1 <host> -> rustc 2 <host>
+        [build] rustc 1 <host> -> LldWrapper 2 <host>
+        [build] rustc 1 <host> -> LlvmBitcodeLinker 2 <host>
+        [build] rustc 1 <host> -> std 1 <target1>
+        [build] rustc 2 <host> -> std 2 <target1>
+        [build] llvm <target1>
+        [build] rustc 1 <host> -> rustc 2 <target1>
+        [build] rustc 1 <host> -> LldWrapper 2 <target1>
+        [build] rustc 1 <host> -> LlvmBitcodeLinker 2 <target1>
+        [build] rustdoc 1 <target1>
+        "
+        );
+    }
+
+    #[test]
     fn build_library_no_explicit_stage() {
         let ctx = TestCtx::new();
         insta::assert_snapshot!(
@@ -942,7 +999,7 @@ mod snapshot {
         [build] llvm <host>
         [build] rustc 0 <host> -> rustc 1 <host>
         [build] rustdoc 0 <host>
-        [doc] std 1 <host>
+        [doc] std 1 <host> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,std,std_detect,sysroot,test,unwind]
         ");
     }
 
@@ -991,12 +1048,12 @@ mod snapshot {
         [build] rustc 1 <host> -> std 1 <host>
         [build] rustc 1 <host> -> rustc 2 <host>
         [build] rustdoc 1 <host>
-        [doc] std 2 <host>
+        [doc] std 2 <host> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,std,std_detect,sysroot,test,unwind]
         [build] rustc 2 <host> -> std 2 <host>
         [build] rustc 0 <host> -> LintDocs 1 <host>
         [build] rustc 0 <host> -> RustInstaller 1 <host>
         [dist] docs <host>
-        [doc] std 2 <host>
+        [doc] std 2 <host> crates=[]
         [dist] mingw <host>
         [build] rustc 0 <host> -> GenerateCopyright 1 <host>
         [dist] rustc <host>
@@ -1010,25 +1067,35 @@ mod snapshot {
     fn dist_extended() {
         let ctx = TestCtx::new();
         insta::assert_snapshot!(
-            ctx
-                .config("dist")
-                .args(&["--set", "build.extended=true"])
-                .render_steps(), @r"
+            ctx.config("dist")
+            .args(&[
+                "--set",
+                "build.extended=true",
+                "--set",
+                "rust.llvm-bitcode-linker=true",
+                "--set",
+                "rust.lld=true",
+            ])
+            .render_steps(), @r"
         [build] rustc 0 <host> -> UnstableBookGen 1 <host>
         [build] rustc 0 <host> -> Rustbook 1 <host>
         [build] llvm <host>
         [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustc 0 <host> -> LldWrapper 1 <host>
         [build] rustc 0 <host> -> WasmComponentLd 1 <host>
+        [build] rustc 0 <host> -> LlvmBitcodeLinker 1 <host>
         [build] rustc 1 <host> -> std 1 <host>
         [build] rustc 1 <host> -> rustc 2 <host>
+        [build] rustc 1 <host> -> LldWrapper 2 <host>
         [build] rustc 1 <host> -> WasmComponentLd 2 <host>
+        [build] rustc 1 <host> -> LlvmBitcodeLinker 2 <host>
         [build] rustdoc 1 <host>
-        [doc] std 2 <host>
+        [doc] std 2 <host> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,std,std_detect,sysroot,test,unwind]
         [build] rustc 2 <host> -> std 2 <host>
         [build] rustc 0 <host> -> LintDocs 1 <host>
         [build] rustc 0 <host> -> RustInstaller 1 <host>
         [dist] docs <host>
-        [doc] std 2 <host>
+        [doc] std 2 <host> crates=[]
         [dist] mingw <host>
         [build] rustc 0 <host> -> GenerateCopyright 1 <host>
         [dist] rustc <host>
@@ -1059,15 +1126,15 @@ mod snapshot {
         [build] rustc 1 <host> -> std 1 <host>
         [build] rustc 1 <host> -> rustc 2 <host>
         [build] rustdoc 1 <host>
-        [doc] std 2 <host>
-        [doc] std 2 <target1>
+        [doc] std 2 <host> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,std,std_detect,sysroot,test,unwind]
+        [doc] std 2 <target1> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,std,std_detect,sysroot,test,unwind]
         [build] rustc 2 <host> -> std 2 <host>
         [build] rustc 0 <host> -> LintDocs 1 <host>
         [build] rustc 0 <host> -> RustInstaller 1 <host>
         [dist] docs <host>
         [dist] docs <target1>
-        [doc] std 2 <host>
-        [doc] std 2 <target1>
+        [doc] std 2 <host> crates=[]
+        [doc] std 2 <target1> crates=[]
         [dist] mingw <host>
         [dist] mingw <target1>
         [build] rustc 0 <host> -> GenerateCopyright 1 <host>
@@ -1096,14 +1163,14 @@ mod snapshot {
         [build] rustc 1 <host> -> std 1 <host>
         [build] rustc 1 <host> -> rustc 2 <host>
         [build] rustdoc 1 <host>
-        [doc] std 2 <host>
+        [doc] std 2 <host> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,std,std_detect,sysroot,test,unwind]
         [build] rustc 2 <host> -> std 2 <host>
         [build] rustc 0 <host> -> LintDocs 1 <host>
         [build] rustc 1 <host> -> std 1 <target1>
         [build] rustc 2 <host> -> std 2 <target1>
         [build] rustc 0 <host> -> RustInstaller 1 <host>
         [dist] docs <host>
-        [doc] std 2 <host>
+        [doc] std 2 <host> crates=[]
         [dist] mingw <host>
         [build] rustc 0 <host> -> GenerateCopyright 1 <host>
         [dist] rustc <host>
@@ -1133,8 +1200,8 @@ mod snapshot {
         [build] rustc 1 <host> -> std 1 <host>
         [build] rustc 1 <host> -> rustc 2 <host>
         [build] rustdoc 1 <host>
-        [doc] std 2 <host>
-        [doc] std 2 <target1>
+        [doc] std 2 <host> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,std,std_detect,sysroot,test,unwind]
+        [doc] std 2 <target1> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,std,std_detect,sysroot,test,unwind]
         [build] rustc 2 <host> -> std 2 <host>
         [build] rustc 0 <host> -> LintDocs 1 <host>
         [build] rustc 1 <host> -> std 1 <target1>
@@ -1142,8 +1209,8 @@ mod snapshot {
         [build] rustc 0 <host> -> RustInstaller 1 <host>
         [dist] docs <host>
         [dist] docs <target1>
-        [doc] std 2 <host>
-        [doc] std 2 <target1>
+        [doc] std 2 <host> crates=[]
+        [doc] std 2 <target1> crates=[]
         [dist] mingw <host>
         [dist] mingw <target1>
         [build] rustc 0 <host> -> GenerateCopyright 1 <host>
@@ -1175,11 +1242,11 @@ mod snapshot {
         [build] rustc 1 <host> -> std 1 <host>
         [build] rustc 1 <host> -> rustc 2 <host>
         [build] rustdoc 1 <host>
-        [doc] std 2 <target1>
+        [doc] std 2 <target1> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,std,std_detect,sysroot,test,unwind]
         [build] rustc 2 <host> -> std 2 <host>
         [build] rustc 0 <host> -> RustInstaller 1 <host>
         [dist] docs <target1>
-        [doc] std 2 <target1>
+        [doc] std 2 <target1> crates=[]
         [dist] mingw <target1>
         [build] rustc 2 <host> -> std 2 <target1>
         [dist] rustc 2 <host> -> std 2 <target1>
@@ -1207,14 +1274,14 @@ mod snapshot {
         [build] rustc 1 <host> -> rustc 2 <host>
         [build] rustc 1 <host> -> WasmComponentLd 2 <host>
         [build] rustdoc 1 <host>
-        [doc] std 2 <target1>
+        [doc] std 2 <target1> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,std,std_detect,sysroot,test,unwind]
         [build] rustc 2 <host> -> std 2 <host>
         [build] rustc 1 <host> -> std 1 <target1>
         [build] rustc 2 <host> -> std 2 <target1>
         [build] rustc 0 <host> -> LintDocs 1 <host>
         [build] rustc 0 <host> -> RustInstaller 1 <host>
         [dist] docs <target1>
-        [doc] std 2 <target1>
+        [doc] std 2 <target1> crates=[]
         [dist] mingw <target1>
         [build] llvm <target1>
         [build] rustc 1 <host> -> rustc 2 <target1>
@@ -1230,6 +1297,7 @@ mod snapshot {
         [build] rustc 0 <host> -> cargo-clippy 1 <target1>
         [build] rustc 0 <host> -> miri 1 <target1>
         [build] rustc 0 <host> -> cargo-miri 1 <target1>
+        [build] rustc 1 <host> -> LlvmBitcodeLinker 2 <target1>
         ");
     }
 
@@ -1240,17 +1308,19 @@ mod snapshot {
             ctx.config("check")
                 .path("compiler")
                 .render_steps(), @r"
-        [build] llvm <host>
         [check] rustc 0 <host> -> rustc 1 <host>
         [check] rustc 0 <host> -> cranelift 1 <host>
         [check] rustc 0 <host> -> gcc 1 <host>
         ");
+    }
 
+    #[test]
+    fn check_rustc_no_explicit_stage() {
+        let ctx = TestCtx::new();
         insta::assert_snapshot!(
             ctx.config("check")
                 .path("rustc")
                 .render_steps(), @r"
-        [build] llvm <host>
         [check] rustc 0 <host> -> rustc 1 <host>
         ");
     }
@@ -1270,7 +1340,6 @@ mod snapshot {
                 .path("compiler")
                 .stage(1)
                 .render_steps(), @r"
-        [build] llvm <host>
         [check] rustc 0 <host> -> rustc 1 <host>
         [check] rustc 0 <host> -> cranelift 1 <host>
         [check] rustc 0 <host> -> gcc 1 <host>
@@ -1314,7 +1383,7 @@ mod snapshot {
         [check] rustc 1 <host> -> Miri 2 <target1>
         [check] rustc 1 <host> -> CargoMiri 2 <target1>
         [check] rustc 1 <host> -> Rustfmt 2 <target1>
-        [check] rustc 1 <host> -> rust-analyzer 2 <target1>
+        [check] rustc 1 <host> -> RustAnalyzer 2 <target1>
         [check] rustc 1 <host> -> TestFloatParse 2 <target1>
         [check] rustc 1 <host> -> std 1 <target1>
         ");
@@ -1385,6 +1454,29 @@ mod snapshot {
         ");
     }
 
+    /// Make sure that we don't check library when download-rustc is disabled
+    /// when `--skip-std-check-if-no-download-rustc` was passed.
+    #[test]
+    fn check_library_skip_without_download_rustc() {
+        let ctx = TestCtx::new();
+        let args = ["--set", "rust.download-rustc=false", "--skip-std-check-if-no-download-rustc"];
+        insta::assert_snapshot!(
+            ctx.config("check")
+                .paths(&["library"])
+                .args(&args)
+                .render_steps(), @"");
+
+        insta::assert_snapshot!(
+            ctx.config("check")
+                .paths(&["library", "compiler"])
+                .args(&args)
+                .render_steps(), @r"
+        [check] rustc 0 <host> -> rustc 1 <host>
+        [check] rustc 0 <host> -> cranelift 1 <host>
+        [check] rustc 0 <host> -> gcc 1 <host>
+        ");
+    }
+
     #[test]
     fn check_miri_no_explicit_stage() {
         let ctx = TestCtx::new();
@@ -1392,7 +1484,6 @@ mod snapshot {
             ctx.config("check")
                 .path("miri")
                 .render_steps(), @r"
-        [build] llvm <host>
         [check] rustc 0 <host> -> rustc 1 <host>
         [check] rustc 0 <host> -> Miri 1 <host>
         ");
@@ -1413,7 +1504,6 @@ mod snapshot {
                 .path("miri")
                 .stage(1)
                 .render_steps(), @r"
-        [build] llvm <host>
         [check] rustc 0 <host> -> rustc 1 <host>
         [check] rustc 0 <host> -> Miri 1 <host>
         ");
@@ -1441,7 +1531,7 @@ mod snapshot {
         insta::assert_snapshot!(
             ctx.config("check")
                 .path("compiletest")
-                .render_steps(), @"[check] compiletest <host>");
+                .render_steps(), @"[check] rustc 0 <host> -> Compiletest 1 <host>");
     }
 
     #[test]
@@ -1455,7 +1545,7 @@ mod snapshot {
         [build] llvm <host>
         [build] rustc 0 <host> -> rustc 1 <host>
         [build] rustc 1 <host> -> std 1 <host>
-        [check] compiletest <host>
+        [check] rustc 1 <host> -> Compiletest 2 <host>
         ");
     }
 
@@ -1466,7 +1556,6 @@ mod snapshot {
             ctx.config("check")
                 .path("rustc_codegen_cranelift")
                 .render_steps(), @r"
-        [build] llvm <host>
         [check] rustc 0 <host> -> rustc 1 <host>
         [check] rustc 0 <host> -> cranelift 1 <host>
         [check] rustc 0 <host> -> gcc 1 <host>
@@ -1480,9 +1569,8 @@ mod snapshot {
             ctx.config("check")
                 .path("rust-analyzer")
                 .render_steps(), @r"
-        [build] llvm <host>
         [check] rustc 0 <host> -> rustc 1 <host>
-        [check] rustc 0 <host> -> rust-analyzer 1 <host>
+        [check] rustc 0 <host> -> RustAnalyzer 1 <host>
         ");
     }
 
@@ -1521,6 +1609,95 @@ mod snapshot {
         steps.assert_contains(StepMetadata::test("CrateLibrustc", host));
         steps.assert_contains_fuzzy(StepMetadata::build("rustc", host));
     }
+
+    #[test]
+    fn doc_library() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("doc")
+                .path("library")
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustdoc 0 <host>
+        [doc] std 1 <host> crates=[alloc,compiler_builtins,core,panic_abort,panic_unwind,proc_macro,std,std_detect,sysroot,test,unwind]
+        ");
+    }
+
+    #[test]
+    fn doc_core() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("doc")
+                .path("core")
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustdoc 0 <host>
+        [doc] std 1 <host> crates=[core]
+        ");
+    }
+
+    #[test]
+    fn doc_core_no_std_target() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("doc")
+                .path("core")
+                .override_target_no_std(&host_target())
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustdoc 0 <host>
+        [doc] std 1 <host> crates=[core]
+        ");
+    }
+
+    #[test]
+    fn test_lld_opt_in() {
+        with_lld_opt_in_targets(vec![host_target()], || {
+            let ctx = TestCtx::new();
+            insta::assert_snapshot!(
+                ctx.config("build")
+                    .path("compiler")
+                    .render_steps(), @r"
+            [build] llvm <host>
+            [build] rustc 0 <host> -> rustc 1 <host>
+            [build] rustc 0 <host> -> LldWrapper 1 <host>
+            ");
+        });
+    }
+
+    #[test]
+    fn doc_library_no_std_target() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("doc")
+                .path("library")
+                .override_target_no_std(&host_target())
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustdoc 0 <host>
+        [doc] std 1 <host> crates=[alloc,core]
+        ");
+    }
+
+    #[test]
+    fn doc_library_no_std_target_cross_compile() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("doc")
+                .path("library")
+                .targets(&[TEST_TRIPLE_1])
+                .override_target_no_std(TEST_TRIPLE_1)
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustdoc 0 <host>
+        [doc] std 1 <target1> crates=[alloc,core]
+        ");
+    }
 }
 
 struct ExecutedSteps {
@@ -1529,7 +1706,11 @@ struct ExecutedSteps {
 
 impl ExecutedSteps {
     fn render(&self) -> String {
-        render_steps(&self.steps)
+        self.render_with(RenderConfig::default())
+    }
+
+    fn render_with(&self, config: RenderConfig) -> String {
+        render_steps(&self.steps, config)
     }
 
     #[track_caller]
@@ -1538,7 +1719,7 @@ impl ExecutedSteps {
         if !self.contains(&metadata) {
             panic!(
                 "Metadata `{}` ({metadata:?}) not found in executed steps:\n{}",
-                render_metadata(&metadata),
+                render_metadata(&metadata, &RenderConfig::default()),
                 self.render()
             );
         }
@@ -1553,7 +1734,7 @@ impl ExecutedSteps {
         if !self.contains_fuzzy(&metadata) {
             panic!(
                 "Metadata `{}` ({metadata:?}) not found in executed steps:\n{}",
-                render_metadata(&metadata),
+                render_metadata(&metadata, &RenderConfig::default()),
                 self.render()
             );
         }
@@ -1565,7 +1746,7 @@ impl ExecutedSteps {
         if self.contains(&metadata) {
             panic!(
                 "Metadata `{}` ({metadata:?}) found in executed steps (it should not be there):\n{}",
-                render_metadata(&metadata),
+                render_metadata(&metadata, &RenderConfig::default()),
                 self.render()
             );
         }
@@ -1587,7 +1768,7 @@ impl ExecutedSteps {
 }
 
 fn fuzzy_metadata_eq(executed: &StepMetadata, to_match: &StepMetadata) -> bool {
-    let StepMetadata { name, kind, target, built_by: _, stage: _ } = executed;
+    let StepMetadata { name, kind, target, built_by: _, stage: _, metadata } = executed;
     *name == to_match.name && *kind == to_match.kind && *target == to_match.target
 }
 
@@ -1618,6 +1799,16 @@ impl ConfigBuilder {
     }
 }
 
+struct RenderConfig {
+    normalize_host: bool,
+}
+
+impl Default for RenderConfig {
+    fn default() -> Self {
+        Self { normalize_host: true }
+    }
+}
+
 /// Renders the executed bootstrap steps for usage in snapshot tests with insta.
 /// Only renders certain important steps.
 /// Each value in `steps` should be a tuple of (Step, step output).
@@ -1625,7 +1816,7 @@ impl ConfigBuilder {
 /// The arrow in the rendered output (`X -> Y`) means `X builds Y`.
 /// This is similar to the output printed by bootstrap to stdout, but here it is
 /// generated purely for the purpose of tests.
-fn render_steps(steps: &[ExecutedStep]) -> String {
+fn render_steps(steps: &[ExecutedStep], config: RenderConfig) -> String {
     steps
         .iter()
         .filter_map(|step| {
@@ -1635,32 +1826,35 @@ fn render_steps(steps: &[ExecutedStep]) -> String {
                 return None;
             };
 
-            Some(render_metadata(&metadata))
+            Some(render_metadata(&metadata, &config))
         })
         .collect::<Vec<_>>()
         .join("\n")
 }
 
-fn render_metadata(metadata: &StepMetadata) -> String {
+fn render_metadata(metadata: &StepMetadata, config: &RenderConfig) -> String {
     let mut record = format!("[{}] ", metadata.kind.as_str());
     if let Some(compiler) = metadata.built_by {
-        write!(record, "{} -> ", render_compiler(compiler));
+        write!(record, "{} -> ", render_compiler(compiler, config));
     }
     let stage = metadata.get_stage().map(|stage| format!("{stage} ")).unwrap_or_default();
-    write!(record, "{} {stage}<{}>", metadata.name, normalize_target(metadata.target));
+    write!(record, "{} {stage}<{}>", metadata.name, normalize_target(metadata.target, config));
+    if let Some(metadata) = &metadata.metadata {
+        write!(record, " {metadata}");
+    }
     record
 }
 
-fn normalize_target(target: TargetSelection) -> String {
-    target
-        .to_string()
-        .replace(&host_target(), "host")
-        .replace(TEST_TRIPLE_1, "target1")
-        .replace(TEST_TRIPLE_2, "target2")
+fn normalize_target(target: TargetSelection, config: &RenderConfig) -> String {
+    let mut target = target.to_string();
+    if config.normalize_host {
+        target = target.replace(&host_target(), "host");
+    }
+    target.replace(TEST_TRIPLE_1, "target1").replace(TEST_TRIPLE_2, "target2")
 }
 
-fn render_compiler(compiler: Compiler) -> String {
-    format!("rustc {} <{}>", compiler.stage, normalize_target(compiler.host))
+fn render_compiler(compiler: Compiler, config: &RenderConfig) -> String {
+    format!("rustc {} <{}>", compiler.stage, normalize_target(compiler.host, config))
 }
 
 fn host_target() -> String {
diff --git a/src/bootstrap/src/core/config/config.rs b/src/bootstrap/src/core/config/config.rs
index 59693dc3e4c..6e04f115424 100644
--- a/src/bootstrap/src/core/config/config.rs
+++ b/src/bootstrap/src/core/config/config.rs
@@ -110,6 +110,7 @@ pub struct Config {
     pub include_default_paths: bool,
     pub rustc_error_format: Option<String>,
     pub json_output: bool,
+    pub compile_time_deps: bool,
     pub test_compare_mode: bool,
     pub color: Color,
     pub patch_binaries_for_nix: Option<bool>,
@@ -421,6 +422,7 @@ impl Config {
             jobs: flags_jobs,
             warnings: flags_warnings,
             json_output: flags_json_output,
+            compile_time_deps: flags_compile_time_deps,
             color: flags_color,
             bypass_bootstrap_lock: flags_bypass_bootstrap_lock,
             rust_profile_generate: flags_rust_profile_generate,
@@ -468,6 +470,7 @@ impl Config {
         config.include_default_paths = flags_include_default_paths;
         config.rustc_error_format = flags_rustc_error_format;
         config.json_output = flags_json_output;
+        config.compile_time_deps = flags_compile_time_deps;
         config.on_fail = flags_on_fail;
         config.cmd = flags_cmd;
         config.incremental = flags_incremental;
@@ -694,7 +697,7 @@ impl Config {
         config.change_id = toml.change_id.inner;
 
         let Build {
-            mut description,
+            description,
             build,
             host,
             target,
@@ -746,7 +749,7 @@ impl Config {
             compiletest_diff_tool,
             compiletest_use_stage0_libtest,
             tidy_extra_checks,
-            mut ccache,
+            ccache,
             exclude,
         } = toml.build.unwrap_or_default();
 
@@ -939,7 +942,8 @@ impl Config {
         config.rust_profile_use = flags_rust_profile_use;
         config.rust_profile_generate = flags_rust_profile_generate;
 
-        config.apply_rust_config(toml.rust, flags_warnings, &mut description);
+        config.apply_target_config(toml.target);
+        config.apply_rust_config(toml.rust, flags_warnings);
 
         config.reproducible_artifacts = flags_reproducible_artifact;
         config.description = description;
@@ -960,12 +964,10 @@ impl Config {
             config.channel = channel;
         }
 
-        config.apply_llvm_config(toml.llvm, &mut ccache);
+        config.apply_llvm_config(toml.llvm);
 
         config.apply_gcc_config(toml.gcc);
 
-        config.apply_target_config(toml.target);
-
         match ccache {
             Some(StringOrBool::String(ref s)) => config.ccache = Some(s.to_string()),
             Some(StringOrBool::Bool(true)) => {
@@ -1047,7 +1049,6 @@ impl Config {
             | Subcommand::Run { .. }
             | Subcommand::Setup { .. }
             | Subcommand::Format { .. }
-            | Subcommand::Suggest { .. }
             | Subcommand::Vendor { .. } => flags_stage.unwrap_or(0),
         };
 
@@ -1064,6 +1065,13 @@ impl Config {
             _ => {}
         }
 
+        if config.compile_time_deps && !matches!(config.cmd, Subcommand::Check { .. }) {
+            eprintln!(
+                "WARNING: Can't use --compile-time-deps with any subcommand other than check."
+            );
+            exit!(1);
+        }
+
         // CI should always run stage 2 builds, unless it specifically states otherwise
         #[cfg(not(test))]
         if flags_stage.is_none() && config.is_running_on_ci {
@@ -1088,7 +1096,6 @@ impl Config {
                 | Subcommand::Run { .. }
                 | Subcommand::Setup { .. }
                 | Subcommand::Format { .. }
-                | Subcommand::Suggest { .. }
                 | Subcommand::Vendor { .. }
                 | Subcommand::Perf { .. } => {}
             }
diff --git a/src/bootstrap/src/core/config/flags.rs b/src/bootstrap/src/core/config/flags.rs
index bfc06f90d4f..31a427f9ffa 100644
--- a/src/bootstrap/src/core/config/flags.rs
+++ b/src/bootstrap/src/core/config/flags.rs
@@ -132,6 +132,9 @@ pub struct Flags {
     #[arg(global = true, long)]
     /// use message-format=json
     pub json_output: bool,
+    #[arg(global = true, long)]
+    /// only build proc-macros and build scripts (for rust-analyzer)
+    pub compile_time_deps: bool,
 
     #[arg(global = true, long, value_name = "STYLE")]
     #[arg(value_enum, default_value_t = Color::Auto)]
@@ -383,7 +386,10 @@ pub enum Subcommand {
         bless: bool,
         #[arg(long)]
         /// comma-separated list of other files types to check (accepts py, py:lint,
-        /// py:fmt, shell, shell:lint, cpp, cpp:fmt, spellcheck, spellcheck:fix)
+        /// py:fmt, shell, cpp, cpp:fmt, js, js:lint, js:typecheck, spellcheck)
+        ///
+        /// Any argument can be prefixed with "auto:" to only run if
+        /// relevant files are modified (eg. "auto:py").
         extra_checks: Option<String>,
         #[arg(long)]
         /// rerun tests even if the inputs are unchanged
@@ -475,13 +481,6 @@ Arguments:
         #[arg(value_name = "<PROFILE>|hook|editor|link")]
         profile: Option<PathBuf>,
     },
-    /// Suggest a subset of tests to run, based on modified files
-    #[command(long_about = "\n")]
-    Suggest {
-        /// run suggested tests
-        #[arg(long)]
-        run: bool,
-    },
     /// Vendor dependencies
     Vendor {
         /// Additional `Cargo.toml` to sync and vendor
@@ -512,7 +511,6 @@ impl Subcommand {
             Subcommand::Install => Kind::Install,
             Subcommand::Run { .. } => Kind::Run,
             Subcommand::Setup { .. } => Kind::Setup,
-            Subcommand::Suggest { .. } => Kind::Suggest,
             Subcommand::Vendor { .. } => Kind::Vendor,
             Subcommand::Perf { .. } => Kind::Perf,
         }
diff --git a/src/bootstrap/src/core/config/toml/llvm.rs b/src/bootstrap/src/core/config/toml/llvm.rs
index 4774e202bd8..1f0cecd145c 100644
--- a/src/bootstrap/src/core/config/toml/llvm.rs
+++ b/src/bootstrap/src/core/config/toml/llvm.rs
@@ -17,8 +17,6 @@ define_config! {
         tests: Option<bool> = "tests",
         enzyme: Option<bool> = "enzyme",
         plugins: Option<bool> = "plugins",
-        // FIXME: Remove this field at Q2 2025, it has been replaced by build.ccache
-        ccache: Option<StringOrBool> = "ccache",
         static_libstdcpp: Option<bool> = "static-libstdcpp",
         libzstd: Option<bool> = "libzstd",
         ninja: Option<bool> = "ninja",
@@ -97,7 +95,6 @@ pub fn check_incompatible_options_for_ci_llvm(
         assertions: _,
         tests: _,
         plugins,
-        ccache: _,
         static_libstdcpp: _,
         libzstd,
         ninja: _,
@@ -149,11 +146,7 @@ pub fn check_incompatible_options_for_ci_llvm(
 }
 
 impl Config {
-    pub fn apply_llvm_config(
-        &mut self,
-        toml_llvm: Option<Llvm>,
-        ccache: &mut Option<StringOrBool>,
-    ) {
+    pub fn apply_llvm_config(&mut self, toml_llvm: Option<Llvm>) {
         let mut llvm_tests = None;
         let mut llvm_enzyme = None;
         let mut llvm_offload = None;
@@ -168,7 +161,6 @@ impl Config {
                 tests,
                 enzyme,
                 plugins,
-                ccache: llvm_ccache,
                 static_libstdcpp,
                 libzstd,
                 ninja,
@@ -191,13 +183,7 @@ impl Config {
                 download_ci_llvm,
                 build_config,
             } = llvm;
-            if llvm_ccache.is_some() {
-                eprintln!("Warning: llvm.ccache is deprecated. Use build.ccache instead.");
-            }
 
-            if ccache.is_none() {
-                *ccache = llvm_ccache;
-            }
             set(&mut self.ninja_in_file, ninja);
             llvm_tests = tests;
             llvm_enzyme = enzyme;
diff --git a/src/bootstrap/src/core/config/toml/rust.rs b/src/bootstrap/src/core/config/toml/rust.rs
index ac5eaea3bcb..c136bd4a6f9 100644
--- a/src/bootstrap/src/core/config/toml/rust.rs
+++ b/src/bootstrap/src/core/config/toml/rust.rs
@@ -36,8 +36,6 @@ define_config! {
         incremental: Option<bool> = "incremental",
         default_linker: Option<String> = "default-linker",
         channel: Option<String> = "channel",
-        // FIXME: Remove this field at Q2 2025, it has been replaced by build.description
-        description: Option<String> = "description",
         musl_root: Option<String> = "musl-root",
         rpath: Option<bool> = "rpath",
         strip: Option<bool> = "strip",
@@ -320,7 +318,6 @@ pub fn check_incompatible_options_for_ci_rustc(
         jemalloc,
         rpath,
         channel,
-        description,
         default_linker,
         std_features,
 
@@ -388,7 +385,6 @@ pub fn check_incompatible_options_for_ci_rustc(
     err!(current_rust_config.std_features, std_features, "rust");
 
     warn!(current_rust_config.channel, channel, "rust");
-    warn!(current_rust_config.description, description, "rust");
 
     Ok(())
 }
@@ -414,13 +410,33 @@ pub(crate) fn validate_codegen_backends(backends: Vec<String>, section: &str) ->
     backends
 }
 
+#[cfg(not(test))]
+fn default_lld_opt_in_targets() -> Vec<String> {
+    vec!["x86_64-unknown-linux-gnu".to_string()]
+}
+
+#[cfg(test)]
+thread_local! {
+    static TEST_LLD_OPT_IN_TARGETS: std::cell::RefCell<Option<Vec<String>>> = std::cell::RefCell::new(None);
+}
+
+#[cfg(test)]
+fn default_lld_opt_in_targets() -> Vec<String> {
+    TEST_LLD_OPT_IN_TARGETS.with(|cell| cell.borrow().clone()).unwrap_or_default()
+}
+
+#[cfg(test)]
+pub fn with_lld_opt_in_targets<R>(targets: Vec<String>, f: impl FnOnce() -> R) -> R {
+    TEST_LLD_OPT_IN_TARGETS.with(|cell| {
+        let prev = cell.replace(Some(targets));
+        let result = f();
+        cell.replace(prev);
+        result
+    })
+}
+
 impl Config {
-    pub fn apply_rust_config(
-        &mut self,
-        toml_rust: Option<Rust>,
-        warnings: Warnings,
-        description: &mut Option<String>,
-    ) {
+    pub fn apply_rust_config(&mut self, toml_rust: Option<Rust>, warnings: Warnings) {
         let mut debug = None;
         let mut rustc_debug_assertions = None;
         let mut std_debug_assertions = None;
@@ -459,7 +475,6 @@ impl Config {
                 randomize_layout,
                 default_linker,
                 channel: _, // already handled above
-                description: rust_description,
                 musl_root,
                 rpath,
                 verbose_tests,
@@ -541,6 +556,14 @@ impl Config {
             lld_enabled = lld_enabled_toml;
             std_features = std_features_toml;
 
+            if optimize_toml.as_ref().is_some_and(|v| matches!(v, RustOptimize::Bool(false))) {
+                eprintln!(
+                    "WARNING: setting `optimize` to `false` is known to cause errors and \
+                    should be considered unsupported. Refer to `bootstrap.example.toml` \
+                    for more details."
+                );
+            }
+
             optimize = optimize_toml;
             self.rust_new_symbol_mangling = new_symbol_mangling;
             set(&mut self.rust_optimize_tests, optimize_tests);
@@ -552,14 +575,6 @@ impl Config {
             set(&mut self.jemalloc, jemalloc);
             set(&mut self.test_compare_mode, test_compare_mode);
             set(&mut self.backtrace, backtrace);
-            if rust_description.is_some() {
-                eprintln!(
-                    "Warning: rust.description is deprecated. Use build.description instead."
-                );
-            }
-            if description.is_none() {
-                *description = rust_description;
-            }
             set(&mut self.rust_dist_src, dist_src);
             set(&mut self.verbose_tests, verbose_tests);
             // in the case "false" is set explicitly, do not overwrite the command line args
@@ -619,7 +634,6 @@ impl Config {
         // build our internal lld and use it as the default linker, by setting the `rust.lld` config
         // to true by default:
         // - on the `x86_64-unknown-linux-gnu` target
-        // - on the `dev` and `nightly` channels
         // - when building our in-tree llvm (i.e. the target has not set an `llvm-config`), so that
         //   we're also able to build the corresponding lld
         // - or when using an external llvm that's downloaded from CI, which also contains our prebuilt
@@ -628,14 +642,13 @@ impl Config {
         //   thus, disabled
         // - similarly, lld will not be built nor used by default when explicitly asked not to, e.g.
         //   when the config sets `rust.lld = false`
-        if self.host_target.triple == "x86_64-unknown-linux-gnu"
+        if default_lld_opt_in_targets().contains(&self.host_target.triple.to_string())
             && self.hosts == [self.host_target]
-            && (self.channel == "dev" || self.channel == "nightly")
         {
             let no_llvm_config = self
                 .target_config
                 .get(&self.host_target)
-                .is_some_and(|target_config| target_config.llvm_config.is_none());
+                .is_none_or(|target_config| target_config.llvm_config.is_none());
             let enable_lld = self.llvm_from_ci || no_llvm_config;
             // Prefer the config setting in case an explicit opt-out is needed.
             self.lld_enabled = lld_enabled.unwrap_or(enable_lld);
diff --git a/src/bootstrap/src/core/sanity.rs b/src/bootstrap/src/core/sanity.rs
index f2119e84cce..b39d464493e 100644
--- a/src/bootstrap/src/core/sanity.rs
+++ b/src/bootstrap/src/core/sanity.rs
@@ -216,7 +216,6 @@ than building it.
             build.config.cmd,
             Subcommand::Clean { .. }
                 | Subcommand::Check { .. }
-                | Subcommand::Suggest { .. }
                 | Subcommand::Format { .. }
                 | Subcommand::Setup { .. }
         );
diff --git a/src/bootstrap/src/lib.rs b/src/bootstrap/src/lib.rs
index ef5c28272b8..63aab4d116a 100644
--- a/src/bootstrap/src/lib.rs
+++ b/src/bootstrap/src/lib.rs
@@ -22,7 +22,7 @@ use std::collections::{BTreeSet, HashMap, HashSet};
 use std::fmt::Display;
 use std::path::{Path, PathBuf};
 use std::sync::OnceLock;
-use std::time::SystemTime;
+use std::time::{Instant, SystemTime};
 use std::{env, fs, io, str};
 
 use build_helper::ci::gha;
@@ -253,12 +253,24 @@ pub enum Mode {
     /// These tools are intended to be only executed on the host system that
     /// invokes bootstrap, and they thus cannot be cross-compiled.
     ///
-    /// They are always built using the stage0 compiler, and typically they
+    /// They are always built using the stage0 compiler, and they
     /// can be compiled with stable Rust.
     ///
     /// These tools also essentially do not participate in staging.
     ToolBootstrap,
 
+    /// Build a cross-compilable helper tool. These tools do not depend on unstable features or
+    /// compiler internals, but they might be cross-compilable (so we cannot build them using the
+    /// stage0 compiler, unlike `ToolBootstrap`).
+    ///
+    /// Some of these tools are also shipped in our `dist` archives.
+    /// While we could compile them using the stage0 compiler when not cross-compiling, we instead
+    /// use the in-tree compiler (and std) to build them, so that we can ship e.g. std security
+    /// fixes and avoid depending fully on stage0 for the artifacts that we ship.
+    ///
+    /// This mode is used e.g. for linkers and linker tools invoked by rustc on its host target.
+    ToolTarget,
+
     /// Build a tool which uses the locally built std, placing output in the
     /// "stageN-tools" directory. Its usage is quite rare, mainly used by
     /// compiletest which needs libtest.
@@ -273,11 +285,21 @@ pub enum Mode {
 
 impl Mode {
     pub fn is_tool(&self) -> bool {
-        matches!(self, Mode::ToolBootstrap | Mode::ToolRustc | Mode::ToolStd)
+        match self {
+            Mode::ToolBootstrap | Mode::ToolRustc | Mode::ToolStd | Mode::ToolTarget => true,
+            Mode::Std | Mode::Codegen | Mode::Rustc => false,
+        }
     }
 
     pub fn must_support_dlopen(&self) -> bool {
-        matches!(self, Mode::Std | Mode::Codegen)
+        match self {
+            Mode::Std | Mode::Codegen => true,
+            Mode::ToolBootstrap
+            | Mode::ToolRustc
+            | Mode::ToolStd
+            | Mode::ToolTarget
+            | Mode::Rustc => false,
+        }
     }
 }
 
@@ -651,11 +673,9 @@ impl Build {
         // Handle hard-coded subcommands.
         {
             #[cfg(feature = "tracing")]
-            let _hardcoded_span = span!(
-                tracing::Level::DEBUG,
-                "handling hardcoded subcommands (Format, Suggest, Perf)"
-            )
-            .entered();
+            let _hardcoded_span =
+                span!(tracing::Level::DEBUG, "handling hardcoded subcommands (Format, Perf)")
+                    .entered();
 
             match &self.config.cmd {
                 Subcommand::Format { check, all } => {
@@ -666,9 +686,6 @@ impl Build {
                         &self.config.paths,
                     );
                 }
-                Subcommand::Suggest { run } => {
-                    return core::build_steps::suggest::suggest(&builder::Builder::new(self), *run);
-                }
                 Subcommand::Perf(args) => {
                     return core::build_steps::perf::perf(&builder::Builder::new(self), args);
                 }
@@ -775,6 +792,9 @@ impl Build {
         if self.config.rust_randomize_layout && check("rustc_randomized_layouts") {
             features.push("rustc_randomized_layouts");
         }
+        if self.config.compile_time_deps && kind == Kind::Check {
+            features.push("check_only");
+        }
 
         // If debug logging is on, then we want the default for tracing:
         // https://github.com/tokio-rs/tracing/blob/3dd5c03d907afdf2c39444a29931833335171554/tracing/src/level_filters.rs#L26
@@ -804,17 +824,39 @@ impl Build {
     /// stage when running with a particular host compiler.
     ///
     /// The mode indicates what the root directory is for.
-    fn stage_out(&self, compiler: Compiler, mode: Mode) -> PathBuf {
-        let suffix = match mode {
-            Mode::Std => "-std",
-            Mode::Rustc => "-rustc",
-            Mode::Codegen => "-codegen",
-            Mode::ToolBootstrap => {
-                return self.out.join(compiler.host).join("bootstrap-tools");
+    fn stage_out(&self, build_compiler: Compiler, mode: Mode) -> PathBuf {
+        use std::fmt::Write;
+
+        fn bootstrap_tool() -> (Option<u32>, &'static str) {
+            (None, "bootstrap-tools")
+        }
+        fn staged_tool(build_compiler: Compiler) -> (Option<u32>, &'static str) {
+            (Some(build_compiler.stage), "tools")
+        }
+
+        let (stage, suffix) = match mode {
+            Mode::Std => (Some(build_compiler.stage), "std"),
+            Mode::Rustc => (Some(build_compiler.stage), "rustc"),
+            Mode::Codegen => (Some(build_compiler.stage), "codegen"),
+            Mode::ToolBootstrap => bootstrap_tool(),
+            Mode::ToolStd | Mode::ToolRustc => (Some(build_compiler.stage), "tools"),
+            Mode::ToolTarget => {
+                // If we're not cross-compiling (the common case), share the target directory with
+                // bootstrap tools to reuse the build cache.
+                if build_compiler.stage == 0 {
+                    bootstrap_tool()
+                } else {
+                    staged_tool(build_compiler)
+                }
             }
-            Mode::ToolStd | Mode::ToolRustc => "-tools",
         };
-        self.out.join(compiler.host).join(format!("stage{}{}", compiler.stage, suffix))
+        let path = self.out.join(build_compiler.host);
+        let mut dir_name = String::new();
+        if let Some(stage) = stage {
+            write!(dir_name, "stage{stage}-").unwrap();
+        }
+        dir_name.push_str(suffix);
+        path.join(dir_name)
     }
 
     /// Returns the root output directory for all Cargo output in a given stage,
@@ -1318,7 +1360,7 @@ impl Build {
         if let Some(path) = configured {
             return Some(path.join("lib").join(target.to_string()));
         }
-        let mut env_root = PathBuf::from(std::env::var_os("WASI_SDK_PATH")?);
+        let mut env_root = self.wasi_sdk_path.clone()?;
         env_root.push("share");
         env_root.push("wasi-sysroot");
         env_root.push("lib");
@@ -1928,6 +1970,10 @@ to download LLVM rather than building it.
     pub fn exec_ctx(&self) -> &ExecutionContext {
         &self.config.exec_ctx
     }
+
+    pub fn report_summary(&self, start_time: Instant) {
+        self.config.exec_ctx.profiler().report_summary(start_time);
+    }
 }
 
 impl AsRef<ExecutionContext> for Build {
diff --git a/src/bootstrap/src/utils/cc_detect.rs b/src/bootstrap/src/utils/cc_detect.rs
index dcafeb80f90..d3926df9650 100644
--- a/src/bootstrap/src/utils/cc_detect.rs
+++ b/src/bootstrap/src/utils/cc_detect.rs
@@ -67,7 +67,6 @@ pub fn fill_compilers(build: &mut Build) {
         // We don't need to check cross targets for these commands.
         crate::Subcommand::Clean { .. }
         | crate::Subcommand::Check { .. }
-        | crate::Subcommand::Suggest { .. }
         | crate::Subcommand::Format { .. }
         | crate::Subcommand::Setup { .. } => {
             build.hosts.iter().cloned().chain(iter::once(build.host_target)).collect()
@@ -221,10 +220,15 @@ fn default_compiler(
         }
 
         t if t.contains("-wasi") => {
-            let root = build
-                .wasi_sdk_path
-                .as_ref()
-                .expect("WASI_SDK_PATH mut be configured for a -wasi target");
+            let root = if let Some(path) = build.wasi_sdk_path.as_ref() {
+                path
+            } else {
+                if build.config.is_running_on_ci {
+                    panic!("ERROR: WASI_SDK_PATH must be configured for a -wasi target on CI");
+                }
+                println!("WARNING: WASI_SDK_PATH not set, using default cc/cxx compiler");
+                return None;
+            };
             let compiler = match compiler {
                 Language::C => format!("{t}-clang"),
                 Language::CPlusPlus => format!("{t}-clang++"),
diff --git a/src/bootstrap/src/utils/change_tracker.rs b/src/bootstrap/src/utils/change_tracker.rs
index 424f211c7d4..f802640a42d 100644
--- a/src/bootstrap/src/utils/change_tracker.rs
+++ b/src/bootstrap/src/utils/change_tracker.rs
@@ -461,4 +461,29 @@ pub const CONFIG_CHANGE_HISTORY: &[ChangeInfo] = &[
         severity: ChangeSeverity::Warning,
         summary: "`download-rustc` has been temporarily disabled for the library profile due to implementation bugs (see #142505).",
     },
+    ChangeInfo {
+        change_id: 143398,
+        severity: ChangeSeverity::Info,
+        summary: "The --extra-checks flag now supports prefixing any check with `auto:` to only run it if relevant files are modified",
+    },
+    ChangeInfo {
+        change_id: 143785,
+        severity: ChangeSeverity::Info,
+        summary: "A --compile-time-deps flag has been added to reduce the time it takes rust-analyzer to start",
+    },
+    ChangeInfo {
+        change_id: 143733,
+        severity: ChangeSeverity::Info,
+        summary: "Option `tool.TOOL_NAME.features` now works on any subcommand, not just `build`.",
+    },
+    ChangeInfo {
+        change_id: 143630,
+        severity: ChangeSeverity::Warning,
+        summary: "The current `./x suggest` implementation has been removed due to it being quite broken and a lack of maintenance bandwidth, with no prejudice against re-implementing it in a more maintainable form.",
+    },
+    ChangeInfo {
+        change_id: 143926,
+        severity: ChangeSeverity::Warning,
+        summary: "Removed `rust.description` and `llvm.ccache` as it was deprecated in #137723 and #136941 long time ago.",
+    },
 ];
diff --git a/src/bootstrap/src/utils/exec.rs b/src/bootstrap/src/utils/exec.rs
index 487077835ac..209ff393973 100644
--- a/src/bootstrap/src/utils/exec.rs
+++ b/src/bootstrap/src/utils/exec.rs
@@ -10,13 +10,17 @@
 use std::collections::HashMap;
 use std::ffi::{OsStr, OsString};
 use std::fmt::{Debug, Formatter};
+use std::fs::File;
 use std::hash::Hash;
+use std::io::{BufWriter, Write};
 use std::panic::Location;
 use std::path::Path;
+use std::process;
 use std::process::{
     Child, ChildStderr, ChildStdout, Command, CommandArgs, CommandEnvs, ExitStatus, Output, Stdio,
 };
 use std::sync::{Arc, Mutex};
+use std::time::{Duration, Instant};
 
 use build_helper::ci::CiEnv;
 use build_helper::drop_bomb::DropBomb;
@@ -65,13 +69,159 @@ impl OutputMode {
 }
 
 #[derive(Clone, Debug, PartialEq, Eq, Hash, Default)]
-pub struct CommandCacheKey {
+pub struct CommandFingerprint {
     program: OsString,
     args: Vec<OsString>,
     envs: Vec<(OsString, Option<OsString>)>,
     cwd: Option<PathBuf>,
 }
 
+impl CommandFingerprint {
+    /// Helper method to format both Command and BootstrapCommand as a short execution line,
+    /// without all the other details (e.g. environment variables).
+    pub fn format_short_cmd(&self) -> String {
+        let program = Path::new(&self.program);
+        let mut line = vec![program.file_name().unwrap().to_str().unwrap().to_owned()];
+        line.extend(self.args.iter().map(|arg| arg.to_string_lossy().into_owned()));
+        line.extend(self.cwd.iter().map(|p| p.to_string_lossy().into_owned()));
+        line.join(" ")
+    }
+}
+
+#[derive(Default, Clone)]
+pub struct CommandProfile {
+    pub traces: Vec<ExecutionTrace>,
+}
+
+#[derive(Default)]
+pub struct CommandProfiler {
+    stats: Mutex<HashMap<CommandFingerprint, CommandProfile>>,
+}
+
+impl CommandProfiler {
+    pub fn record_execution(&self, key: CommandFingerprint, start_time: Instant) {
+        let mut stats = self.stats.lock().unwrap();
+        let entry = stats.entry(key).or_default();
+        entry.traces.push(ExecutionTrace::Executed { duration: start_time.elapsed() });
+    }
+
+    pub fn record_cache_hit(&self, key: CommandFingerprint) {
+        let mut stats = self.stats.lock().unwrap();
+        let entry = stats.entry(key).or_default();
+        entry.traces.push(ExecutionTrace::CacheHit);
+    }
+
+    pub fn report_summary(&self, start_time: Instant) {
+        let pid = process::id();
+        let filename = format!("bootstrap-profile-{pid}.txt");
+
+        let file = match File::create(&filename) {
+            Ok(f) => f,
+            Err(e) => {
+                eprintln!("Failed to create profiler output file: {e}");
+                return;
+            }
+        };
+
+        let mut writer = BufWriter::new(file);
+        let stats = self.stats.lock().unwrap();
+
+        let mut entries: Vec<_> = stats
+            .iter()
+            .map(|(key, profile)| {
+                let max_duration = profile
+                    .traces
+                    .iter()
+                    .filter_map(|trace| match trace {
+                        ExecutionTrace::Executed { duration, .. } => Some(*duration),
+                        _ => None,
+                    })
+                    .max();
+
+                (key, profile, max_duration)
+            })
+            .collect();
+
+        entries.sort_by(|a, b| b.2.cmp(&a.2));
+
+        let total_bootstrap_duration = start_time.elapsed();
+
+        let total_fingerprints = entries.len();
+        let mut total_cache_hits = 0;
+        let mut total_execution_duration = Duration::ZERO;
+        let mut total_saved_duration = Duration::ZERO;
+
+        for (key, profile, max_duration) in &entries {
+            writeln!(writer, "Command: {:?}", key.format_short_cmd()).unwrap();
+
+            let mut hits = 0;
+            let mut runs = 0;
+            let mut command_total_duration = Duration::ZERO;
+
+            for trace in &profile.traces {
+                match trace {
+                    ExecutionTrace::CacheHit => {
+                        hits += 1;
+                    }
+                    ExecutionTrace::Executed { duration, .. } => {
+                        runs += 1;
+                        command_total_duration += *duration;
+                    }
+                }
+            }
+
+            total_cache_hits += hits;
+            total_execution_duration += command_total_duration;
+            // This makes sense only in our current setup, where:
+            // - If caching is enabled, we record the timing for the initial execution,
+            //   and all subsequent runs will be cache hits.
+            // - If caching is disabled or unused, there will be no cache hits,
+            //   and we'll record timings for all executions.
+            total_saved_duration += command_total_duration * hits as u32;
+
+            let command_vs_bootstrap = if total_bootstrap_duration > Duration::ZERO {
+                100.0 * command_total_duration.as_secs_f64()
+                    / total_bootstrap_duration.as_secs_f64()
+            } else {
+                0.0
+            };
+
+            let duration_str = match max_duration {
+                Some(d) => format!("{d:.2?}"),
+                None => "-".into(),
+            };
+
+            writeln!(
+                writer,
+                "Summary: {runs} run(s), {hits} hit(s), max_duration={duration_str} total_duration: {command_total_duration:.2?} ({command_vs_bootstrap:.2?}% of total)\n"
+            )
+            .unwrap();
+        }
+
+        let overhead_time = total_bootstrap_duration
+            .checked_sub(total_execution_duration)
+            .unwrap_or(Duration::ZERO);
+
+        writeln!(writer, "\n=== Aggregated Summary ===").unwrap();
+        writeln!(writer, "Total unique commands (fingerprints): {total_fingerprints}").unwrap();
+        writeln!(writer, "Total time spent in command executions: {total_execution_duration:.2?}")
+            .unwrap();
+        writeln!(writer, "Total bootstrap time: {total_bootstrap_duration:.2?}").unwrap();
+        writeln!(writer, "Time spent outside command executions: {overhead_time:.2?}").unwrap();
+        writeln!(writer, "Total cache hits: {total_cache_hits}").unwrap();
+        writeln!(writer, "Estimated time saved due to cache hits: {total_saved_duration:.2?}")
+            .unwrap();
+
+        println!("Command profiler report saved to {filename}");
+    }
+}
+
+#[derive(Clone)]
+pub enum ExecutionTrace {
+    CacheHit,
+    Executed { duration: Duration },
+}
+
 /// Wrapper around `std::process::Command`.
 ///
 /// By default, the command will exit bootstrap if it fails.
@@ -244,12 +394,9 @@ impl<'a> BootstrapCommand {
         }
     }
 
-    pub fn cache_key(&self) -> Option<CommandCacheKey> {
-        if !self.should_cache {
-            return None;
-        }
+    pub fn fingerprint(&self) -> CommandFingerprint {
         let command = &self.command;
-        Some(CommandCacheKey {
+        CommandFingerprint {
             program: command.get_program().into(),
             args: command.get_args().map(OsStr::to_os_string).collect(),
             envs: command
@@ -257,7 +404,7 @@ impl<'a> BootstrapCommand {
                 .map(|(k, v)| (k.to_os_string(), v.map(|val| val.to_os_string())))
                 .collect(),
             cwd: command.get_current_dir().map(Path::to_path_buf),
-        })
+        }
     }
 }
 
@@ -400,30 +547,6 @@ impl Default for CommandOutput {
     }
 }
 
-/// Helper trait to format both Command and BootstrapCommand as a short execution line,
-/// without all the other details (e.g. environment variables).
-#[cfg(feature = "tracing")]
-pub trait FormatShortCmd {
-    fn format_short_cmd(&self) -> String;
-}
-
-#[cfg(feature = "tracing")]
-impl FormatShortCmd for BootstrapCommand {
-    fn format_short_cmd(&self) -> String {
-        self.command.format_short_cmd()
-    }
-}
-
-#[cfg(feature = "tracing")]
-impl FormatShortCmd for Command {
-    fn format_short_cmd(&self) -> String {
-        let program = Path::new(self.get_program());
-        let mut line = vec![program.file_name().unwrap().to_str().unwrap()];
-        line.extend(self.get_args().map(|arg| arg.to_str().unwrap()));
-        line.join(" ")
-    }
-}
-
 #[derive(Clone, Default)]
 pub struct ExecutionContext {
     dry_run: DryRun,
@@ -431,11 +554,12 @@ pub struct ExecutionContext {
     pub fail_fast: bool,
     delayed_failures: Arc<Mutex<Vec<String>>>,
     command_cache: Arc<CommandCache>,
+    profiler: Arc<CommandProfiler>,
 }
 
 #[derive(Default)]
 pub struct CommandCache {
-    cache: Mutex<HashMap<CommandCacheKey, CommandOutput>>,
+    cache: Mutex<HashMap<CommandFingerprint, CommandOutput>>,
 }
 
 enum CommandState<'a> {
@@ -446,7 +570,10 @@ enum CommandState<'a> {
         stdout: OutputMode,
         stderr: OutputMode,
         executed_at: &'a Location<'a>,
-        cache_key: Option<CommandCacheKey>,
+        fingerprint: CommandFingerprint,
+        start_time: Instant,
+        #[cfg(feature = "tracing")]
+        _span_guard: tracing::span::EnteredSpan,
     },
 }
 
@@ -454,6 +581,10 @@ pub struct StreamingCommand {
     child: Child,
     pub stdout: Option<ChildStdout>,
     pub stderr: Option<ChildStderr>,
+    fingerprint: CommandFingerprint,
+    start_time: Instant,
+    #[cfg(feature = "tracing")]
+    _span_guard: tracing::span::EnteredSpan,
 }
 
 #[must_use]
@@ -462,11 +593,11 @@ pub struct DeferredCommand<'a> {
 }
 
 impl CommandCache {
-    pub fn get(&self, key: &CommandCacheKey) -> Option<CommandOutput> {
+    pub fn get(&self, key: &CommandFingerprint) -> Option<CommandOutput> {
         self.cache.lock().unwrap().get(key).cloned()
     }
 
-    pub fn insert(&self, key: CommandCacheKey, output: CommandOutput) {
+    pub fn insert(&self, key: CommandFingerprint, output: CommandOutput) {
         self.cache.lock().unwrap().insert(key, output);
     }
 }
@@ -483,6 +614,10 @@ impl ExecutionContext {
         }
     }
 
+    pub fn profiler(&self) -> &CommandProfiler {
+        &self.profiler
+    }
+
     pub fn get_dry_run(&self) -> &DryRun {
         &self.dry_run
     }
@@ -539,12 +674,15 @@ impl ExecutionContext {
         stdout: OutputMode,
         stderr: OutputMode,
     ) -> DeferredCommand<'a> {
-        let cache_key = command.cache_key();
+        let fingerprint = command.fingerprint();
 
-        if let Some(cached_output) = cache_key.as_ref().and_then(|key| self.command_cache.get(key))
-        {
+        #[cfg(feature = "tracing")]
+        let span_guard = trace_cmd!(command);
+
+        if let Some(cached_output) = self.command_cache.get(&fingerprint) {
             command.mark_as_executed();
             self.verbose(|| println!("Cache hit: {command:?}"));
+            self.profiler.record_cache_hit(fingerprint);
             return DeferredCommand { state: CommandState::Cached(cached_output) };
         }
 
@@ -559,14 +697,14 @@ impl ExecutionContext {
                     stdout,
                     stderr,
                     executed_at,
-                    cache_key,
+                    fingerprint,
+                    start_time: Instant::now(),
+                    #[cfg(feature = "tracing")]
+                    _span_guard: span_guard,
                 },
             };
         }
 
-        #[cfg(feature = "tracing")]
-        let _run_span = trace_cmd!(command);
-
         self.verbose(|| {
             println!("running: {command:?} (created at {created_at}, executed at {executed_at})")
         });
@@ -575,6 +713,8 @@ impl ExecutionContext {
         cmd.stdout(stdout.stdio());
         cmd.stderr(stderr.stdio());
 
+        let start_time = Instant::now();
+
         let child = cmd.spawn();
 
         DeferredCommand {
@@ -584,7 +724,10 @@ impl ExecutionContext {
                 stdout,
                 stderr,
                 executed_at,
-                cache_key,
+                fingerprint,
+                start_time,
+                #[cfg(feature = "tracing")]
+                _span_guard: span_guard,
             },
         }
     }
@@ -638,6 +781,12 @@ impl ExecutionContext {
         if !command.run_in_dry_run && self.dry_run() {
             return None;
         }
+
+        #[cfg(feature = "tracing")]
+        let span_guard = trace_cmd!(command);
+
+        let start_time = Instant::now();
+        let fingerprint = command.fingerprint();
         let cmd = &mut command.command;
         cmd.stdout(stdout.stdio());
         cmd.stderr(stderr.stdio());
@@ -649,7 +798,15 @@ impl ExecutionContext {
 
         let stdout = child.stdout.take();
         let stderr = child.stderr.take();
-        Some(StreamingCommand { child, stdout, stderr })
+        Some(StreamingCommand {
+            child,
+            stdout,
+            stderr,
+            fingerprint,
+            start_time,
+            #[cfg(feature = "tracing")]
+            _span_guard: span_guard,
+        })
     }
 }
 
@@ -660,8 +817,14 @@ impl AsRef<ExecutionContext> for ExecutionContext {
 }
 
 impl StreamingCommand {
-    pub fn wait(mut self) -> Result<ExitStatus, std::io::Error> {
-        self.child.wait()
+    pub fn wait(
+        mut self,
+        exec_ctx: impl AsRef<ExecutionContext>,
+    ) -> Result<ExitStatus, std::io::Error> {
+        let exec_ctx = exec_ctx.as_ref();
+        let output = self.child.wait();
+        exec_ctx.profiler().record_execution(self.fingerprint, self.start_time);
+        output
     }
 }
 
@@ -669,16 +832,31 @@ impl<'a> DeferredCommand<'a> {
     pub fn wait_for_output(self, exec_ctx: impl AsRef<ExecutionContext>) -> CommandOutput {
         match self.state {
             CommandState::Cached(output) => output,
-            CommandState::Deferred { process, command, stdout, stderr, executed_at, cache_key } => {
+            CommandState::Deferred {
+                process,
+                command,
+                stdout,
+                stderr,
+                executed_at,
+                fingerprint,
+                start_time,
+                #[cfg(feature = "tracing")]
+                _span_guard,
+            } => {
                 let exec_ctx = exec_ctx.as_ref();
 
                 let output =
                     Self::finish_process(process, command, stdout, stderr, executed_at, exec_ctx);
 
+                #[cfg(feature = "tracing")]
+                drop(_span_guard);
+
                 if (!exec_ctx.dry_run() || command.run_in_dry_run)
-                    && let (Some(cache_key), Some(_)) = (&cache_key, output.status())
+                    && output.status().is_some()
+                    && command.should_cache
                 {
-                    exec_ctx.command_cache.insert(cache_key.clone(), output.clone());
+                    exec_ctx.command_cache.insert(fingerprint.clone(), output.clone());
+                    exec_ctx.profiler.record_execution(fingerprint.clone(), start_time);
                 }
 
                 output
diff --git a/src/bootstrap/src/utils/helpers.rs b/src/bootstrap/src/utils/helpers.rs
index 3c5f612daa7..eb00ed566c2 100644
--- a/src/bootstrap/src/utils/helpers.rs
+++ b/src/bootstrap/src/utils/helpers.rs
@@ -404,8 +404,9 @@ pub fn linker_args(
     builder: &Builder<'_>,
     target: TargetSelection,
     lld_threads: LldThreads,
+    stage: u32,
 ) -> Vec<String> {
-    let mut args = linker_flags(builder, target, lld_threads);
+    let mut args = linker_flags(builder, target, lld_threads, stage);
 
     if let Some(linker) = builder.linker(target) {
         args.push(format!("-Clinker={}", linker.display()));
@@ -420,19 +421,30 @@ pub fn linker_flags(
     builder: &Builder<'_>,
     target: TargetSelection,
     lld_threads: LldThreads,
+    stage: u32,
 ) -> Vec<String> {
     let mut args = vec![];
     if !builder.is_lld_direct_linker(target) && builder.config.lld_mode.is_used() {
         match builder.config.lld_mode {
             LldMode::External => {
-                args.push("-Zlinker-features=+lld".to_string());
-                // FIXME(kobzol): remove this flag once MCP510 gets stabilized
+                // cfg(bootstrap) - remove the stage 0 check after updating the bootstrap compiler:
+                // `-Clinker-features` has been stabilized.
+                if stage == 0 {
+                    args.push("-Zlinker-features=+lld".to_string());
+                } else {
+                    args.push("-Clinker-features=+lld".to_string());
+                }
                 args.push("-Zunstable-options".to_string());
             }
             LldMode::SelfContained => {
-                args.push("-Zlinker-features=+lld".to_string());
+                // cfg(bootstrap) - remove the stage 0 check after updating the bootstrap compiler:
+                // `-Clinker-features` has been stabilized.
+                if stage == 0 {
+                    args.push("-Zlinker-features=+lld".to_string());
+                } else {
+                    args.push("-Clinker-features=+lld".to_string());
+                }
                 args.push("-Clink-self-contained=+linker".to_string());
-                // FIXME(kobzol): remove this flag once MCP510 gets stabilized
                 args.push("-Zunstable-options".to_string());
             }
             LldMode::Unused => unreachable!(),
@@ -453,8 +465,9 @@ pub fn add_rustdoc_cargo_linker_args(
     builder: &Builder<'_>,
     target: TargetSelection,
     lld_threads: LldThreads,
+    stage: u32,
 ) {
-    let args = linker_args(builder, target, lld_threads);
+    let args = linker_args(builder, target, lld_threads, stage);
     let mut flags = cmd
         .get_envs()
         .find_map(|(k, v)| if k == OsStr::new("RUSTDOCFLAGS") { v } else { None })
diff --git a/src/bootstrap/src/utils/metrics.rs b/src/bootstrap/src/utils/metrics.rs
index 862c4449624..9b1ccc32cb6 100644
--- a/src/bootstrap/src/utils/metrics.rs
+++ b/src/bootstrap/src/utils/metrics.rs
@@ -43,7 +43,7 @@ pub(crate) struct BuildMetrics {
     state: RefCell<MetricsState>,
 }
 
-/// NOTE: this isn't really cloning anything, but `x suggest` doesn't need metrics so this is probably ok.
+// NOTE: this isn't really cloning anything, but necessary for `Build: Clone`.
 impl Clone for BuildMetrics {
     fn clone(&self) -> Self {
         Self::init()
diff --git a/src/bootstrap/src/utils/render_tests.rs b/src/bootstrap/src/utils/render_tests.rs
index 934699d736b..40006aca5c5 100644
--- a/src/bootstrap/src/utils/render_tests.rs
+++ b/src/bootstrap/src/utils/render_tests.rs
@@ -63,7 +63,7 @@ fn run_tests(builder: &Builder<'_>, cmd: &mut BootstrapCommand, stream: bool) ->
         renderer.render_all();
     }
 
-    let status = streaming_command.wait().unwrap();
+    let status = streaming_command.wait(&builder.config.exec_ctx).unwrap();
     if !status.success() && builder.is_verbose() {
         println!(
             "\n\ncommand did not execute successfully: {cmd:?}\n\
diff --git a/src/bootstrap/src/utils/tests/mod.rs b/src/bootstrap/src/utils/tests/mod.rs
index 59c169b0f2b..ec87e71e0b6 100644
--- a/src/bootstrap/src/utils/tests/mod.rs
+++ b/src/bootstrap/src/utils/tests/mod.rs
@@ -48,17 +48,30 @@ impl ConfigBuilder {
     }
 
     pub fn path(mut self, path: &str) -> Self {
-        self.args.push(path.to_string());
-        self
+        self.arg(path)
     }
 
     pub fn paths(mut self, paths: &[&str]) -> Self {
-        for path in paths {
-            self = self.path(path);
+        self.args(paths)
+    }
+
+    pub fn arg(mut self, arg: &str) -> Self {
+        self.args.push(arg.to_string());
+        self
+    }
+
+    pub fn args(mut self, args: &[&str]) -> Self {
+        for arg in args {
+            self = self.arg(arg);
         }
         self
     }
 
+    /// Set the specified target to be treated as a no_std target.
+    pub fn override_target_no_std(mut self, target: &str) -> Self {
+        self.args(&["--set", &format!("target.{target}.no-std=true")])
+    }
+
     pub fn hosts(mut self, targets: &[&str]) -> Self {
         self.args.push("--host".to_string());
         self.args.push(targets.join(","));
@@ -77,13 +90,6 @@ impl ConfigBuilder {
         self
     }
 
-    pub fn args(mut self, args: &[&str]) -> Self {
-        for arg in args {
-            self.args.push(arg.to_string());
-        }
-        self
-    }
-
     pub fn create_config(mut self) -> Config {
         // Run in dry-check, otherwise the test would be too slow
         self.args.push("--dry-run".to_string());
@@ -96,8 +102,6 @@ impl ConfigBuilder {
         // in-tree LLVM from sources.
         self.args.push("--set".to_string());
         self.args.push("llvm.download-ci-llvm=false".to_string());
-        self.args.push("--set".to_string());
-        self.args.push(format!("target.'{}'.llvm-config=false", get_host_target()));
 
         // Do not mess with the local rustc checkout build directory
         self.args.push("--build-dir".to_string());
diff --git a/src/bootstrap/src/utils/tracing.rs b/src/bootstrap/src/utils/tracing.rs
index 99849341dc3..109407bc5f2 100644
--- a/src/bootstrap/src/utils/tracing.rs
+++ b/src/bootstrap/src/utils/tracing.rs
@@ -52,13 +52,11 @@ macro_rules! error {
 macro_rules! trace_cmd {
     ($cmd:expr) => {
         {
-            use $crate::utils::exec::FormatShortCmd;
-
             ::tracing::span!(
                 target: "COMMAND",
                 ::tracing::Level::TRACE,
                 "executing command",
-                cmd = $cmd.format_short_cmd(),
+                cmd = $cmd.fingerprint().format_short_cmd(),
                 full_cmd = ?$cmd
             ).entered()
         }
diff --git a/src/build_helper/src/ci.rs b/src/build_helper/src/ci.rs
index 9d114c70a67..b5e70eb84cc 100644
--- a/src/build_helper/src/ci.rs
+++ b/src/build_helper/src/ci.rs
@@ -9,7 +9,7 @@ pub enum CiEnv {
 impl CiEnv {
     /// Obtains the current CI environment.
     pub fn current() -> CiEnv {
-        if std::env::var("GITHUB_ACTIONS").map_or(false, |e| e == "true") {
+        if std::env::var("GITHUB_ACTIONS").is_ok_and(|e| e == "true") {
             CiEnv::GitHubActions
         } else {
             CiEnv::None
diff --git a/src/build_helper/src/git.rs b/src/build_helper/src/git.rs
index 9d1195aadf8..cbefb836c00 100644
--- a/src/build_helper/src/git.rs
+++ b/src/build_helper/src/git.rs
@@ -13,7 +13,7 @@ pub struct GitConfig<'a> {
 pub fn output_result(cmd: &mut Command) -> Result<String, String> {
     let output = match cmd.stderr(Stdio::inherit()).output() {
         Ok(status) => status,
-        Err(e) => return Err(format!("failed to run command: {:?}: {}", cmd, e)),
+        Err(e) => return Err(format!("failed to run command: {cmd:?}: {e}")),
     };
     if !output.status.success() {
         return Err(format!(
@@ -62,22 +62,22 @@ pub enum PathFreshness {
 /// The function behaves differently in CI and outside CI.
 ///
 /// - Outside CI, we want to find out if `target_paths` were modified in some local commit on
-/// top of the latest upstream commit that is available in local git history.
-/// If not, we try to find the most recent upstream commit (which we assume are commits
-/// made by bors) that modified `target_paths`.
-/// We don't want to simply take the latest master commit to avoid changing the output of
-/// this function frequently after rebasing on the latest master branch even if `target_paths`
-/// were not modified upstream in the meantime. In that case we would be redownloading CI
-/// artifacts unnecessarily.
+///   top of the latest upstream commit that is available in local git history.
+///   If not, we try to find the most recent upstream commit (which we assume are commits
+///   made by bors) that modified `target_paths`.
+///   We don't want to simply take the latest master commit to avoid changing the output of
+///   this function frequently after rebasing on the latest master branch even if `target_paths`
+///   were not modified upstream in the meantime. In that case we would be redownloading CI
+///   artifacts unnecessarily.
 ///
 /// - In CI, we use a shallow clone of depth 2, i.e., we fetch only a single parent commit
-/// (which will be the most recent bors merge commit) and do not have access
-/// to the full git history. Luckily, we only need to distinguish between two situations:
-/// 1) The current PR made modifications to `target_paths`.
-/// In that case, a build is typically necessary.
-/// 2) The current PR did not make modifications to `target_paths`.
-/// In that case we simply take the latest upstream commit, because on CI there is no need to avoid
-/// redownloading.
+///   (which will be the most recent bors merge commit) and do not have access
+///   to the full git history. Luckily, we only need to distinguish between two situations:
+///   1) The current PR made modifications to `target_paths`.
+///      In that case, a build is typically necessary.
+///   2) The current PR did not make modifications to `target_paths`.
+///      In that case we simply take the latest upstream commit, because on CI there is no need to avoid
+///      redownloading.
 pub fn check_path_modifications(
     git_dir: &Path,
     config: &GitConfig<'_>,
@@ -232,7 +232,7 @@ pub fn get_closest_upstream_commit(
         "--author-date-order",
         &format!("--author={}", config.git_merge_commit_email),
         "-n1",
-        &base,
+        base,
     ]);
 
     let output = output_result(&mut git)?.trim().to_owned();
diff --git a/src/build_helper/src/lib.rs b/src/build_helper/src/lib.rs
index 05de8fd2d42..266eedc6245 100644
--- a/src/build_helper/src/lib.rs
+++ b/src/build_helper/src/lib.rs
@@ -5,6 +5,7 @@ pub mod drop_bomb;
 pub mod fs;
 pub mod git;
 pub mod metrics;
+pub mod npm;
 pub mod stage0_parser;
 pub mod targets;
 pub mod util;
diff --git a/src/build_helper/src/metrics.rs b/src/build_helper/src/metrics.rs
index 8b82e62a327..07157e36415 100644
--- a/src/build_helper/src/metrics.rs
+++ b/src/build_helper/src/metrics.rs
@@ -141,7 +141,7 @@ impl BuildStep {
                 } => {
                     let full_name = format!("{parent_name}-{kind}");
                     let children: Vec<_> =
-                        children.into_iter().filter_map(|s| parse(s, &full_name)).collect();
+                        children.iter().filter_map(|s| parse(s, &full_name)).collect();
                     let children_duration = children.iter().map(|c| c.duration).sum::<Duration>();
                     Some(BuildStep {
                         r#type: kind.to_string(),
diff --git a/src/build_helper/src/npm.rs b/src/build_helper/src/npm.rs
new file mode 100644
index 00000000000..86cf6183bd0
--- /dev/null
+++ b/src/build_helper/src/npm.rs
@@ -0,0 +1,41 @@
+use std::error::Error;
+use std::path::{Path, PathBuf};
+use std::process::Command;
+use std::{fs, io};
+
+use crate::ci::CiEnv;
+
+/// Install all the npm deps, and return the path of `node_modules`.
+pub fn install(src_root_path: &Path, out_dir: &Path, npm: &Path) -> Result<PathBuf, io::Error> {
+    let nm_path = out_dir.join("node_modules");
+    let copy_to_build = |p| {
+        fs::copy(src_root_path.join(p), out_dir.join(p)).map_err(|e| {
+            eprintln!("unable to copy {p:?} to build directory: {e:?}");
+            e
+        })
+    };
+    // copy stuff to the output directory to make node_modules get put there.
+    copy_to_build("package.json")?;
+    copy_to_build("package-lock.json")?;
+
+    let mut cmd = Command::new(npm);
+    if CiEnv::is_ci() {
+        // `npm ci` redownloads every time and thus is too slow for local development.
+        cmd.arg("ci");
+    } else {
+        cmd.arg("install");
+    }
+    // disable a bunch of things we don't want.
+    // this makes tidy output less noisy, and also significantly improves runtime
+    // of repeated tidy invokations.
+    cmd.args(&["--audit=false", "--save=false", "--fund=false"]);
+    cmd.current_dir(out_dir);
+    let exit_status = cmd.spawn()?.wait()?;
+    if !exit_status.success() {
+        eprintln!("npm install did not exit successfully");
+        return Err(io::Error::other(Box::<dyn Error + Send + Sync>::from(format!(
+            "npm install returned exit code {exit_status}"
+        ))));
+    }
+    Ok(nm_path)
+}
diff --git a/src/build_helper/src/util.rs b/src/build_helper/src/util.rs
index 80dd6813d13..a8355f774e9 100644
--- a/src/build_helper/src/util.rs
+++ b/src/build_helper/src/util.rs
@@ -18,29 +18,28 @@ macro_rules! exit {
 pub fn detail_exit(code: i32, is_test: bool) -> ! {
     // if in test and code is an error code, panic with status code provided
     if is_test {
-        panic!("status code: {}", code);
+        panic!("status code: {code}");
     } else {
-        // otherwise,exit with provided status code
+        // otherwise, exit with provided status code
         std::process::exit(code);
     }
 }
 
 pub fn fail(s: &str) -> ! {
-    eprintln!("\n\n{}\n\n", s);
+    eprintln!("\n\n{s}\n\n");
     detail_exit(1, cfg!(test));
 }
 
 pub fn try_run(cmd: &mut Command, print_cmd_on_fail: bool) -> Result<(), ()> {
     let status = match cmd.status() {
         Ok(status) => status,
-        Err(e) => fail(&format!("failed to execute command: {:?}\nerror: {}", cmd, e)),
+        Err(e) => fail(&format!("failed to execute command: {cmd:?}\nerror: {e}")),
     };
     if !status.success() {
         if print_cmd_on_fail {
             println!(
-                "\n\ncommand did not execute successfully: {:?}\n\
-                 expected success, got: {}\n\n",
-                cmd, status
+                "\n\ncommand did not execute successfully: {cmd:?}\n\
+                 expected success, got: {status}\n\n"
             );
         }
         Err(())
@@ -60,7 +59,7 @@ pub fn parse_gitmodules(target_dir: &Path) -> Vec<String> {
     for line in BufReader::new(file).lines().map_while(Result::ok) {
         let line = line.trim();
         if line.starts_with("path") {
-            let actual_path = line.split(' ').last().expect("Couldn't get value of path");
+            let actual_path = line.split(' ').next_back().expect("Couldn't get value of path");
             submodules_paths.push(actual_path.to_owned());
         }
     }
diff --git a/src/ci/docker/host-aarch64/aarch64-gnu-llvm-19/Dockerfile b/src/ci/docker/host-aarch64/aarch64-gnu-llvm-19/Dockerfile
index 2f9d0010573..e73fbe506f7 100644
--- a/src/ci/docker/host-aarch64/aarch64-gnu-llvm-19/Dockerfile
+++ b/src/ci/docker/host-aarch64/aarch64-gnu-llvm-19/Dockerfile
@@ -50,9 +50,7 @@ ENV RUST_CONFIGURE_ARGS \
 
 COPY scripts/shared.sh /scripts/
 
-ARG SCRIPT_ARG
+COPY scripts/stage_2_test_set1.sh /scripts/
+COPY scripts/stage_2_test_set2.sh /scripts/
 
-COPY scripts/stage_2_test_set1.sh /tmp/
-COPY scripts/stage_2_test_set2.sh /tmp/
-
-ENV SCRIPT "/tmp/${SCRIPT_ARG}"
+ENV SCRIPT "Must specify DOCKER_SCRIPT for this image"
diff --git a/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile
index 44f6a8d2a15..01f19eac1d2 100644
--- a/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile
+++ b/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile
@@ -96,12 +96,10 @@ ENV RUST_CONFIGURE_ARGS \
       --set rust.lto=thin \
       --set rust.codegen-units=1
 
-ARG SCRIPT_ARG
-
 COPY host-x86_64/dist-x86_64-linux/dist.sh /scripts/
 COPY host-x86_64/dist-x86_64-linux/dist-alt.sh /scripts/
 
-ENV SCRIPT /scripts/${SCRIPT_ARG}
+ENV SCRIPT "Must specify DOCKER_SCRIPT for this image"
 
 ENV CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=clang
 
diff --git a/src/ci/docker/host-x86_64/i686-gnu-nopt/Dockerfile b/src/ci/docker/host-x86_64/i686-gnu-nopt/Dockerfile
index 58e66fd637a..be3df9d4036 100644
--- a/src/ci/docker/host-x86_64/i686-gnu-nopt/Dockerfile
+++ b/src/ci/docker/host-x86_64/i686-gnu-nopt/Dockerfile
@@ -23,7 +23,7 @@ COPY scripts/sccache.sh /scripts/
 RUN sh /scripts/sccache.sh
 
 ENV RUST_CONFIGURE_ARGS --build=i686-unknown-linux-gnu --disable-optimize-tests
-ARG SCRIPT_ARG
 COPY scripts/stage_2_test_set1.sh /scripts/
 COPY scripts/stage_2_test_set2.sh /scripts/
-ENV SCRIPT ${SCRIPT_ARG}
+COPY scripts/i686-gnu-nopt-2.sh /scripts/
+ENV SCRIPT "Must specify DOCKER_SCRIPT for this image"
diff --git a/src/ci/docker/host-x86_64/i686-gnu/Dockerfile b/src/ci/docker/host-x86_64/i686-gnu/Dockerfile
index a715f7182d2..00cd24b89db 100644
--- a/src/ci/docker/host-x86_64/i686-gnu/Dockerfile
+++ b/src/ci/docker/host-x86_64/i686-gnu/Dockerfile
@@ -24,7 +24,6 @@ COPY scripts/sccache.sh /scripts/
 RUN sh /scripts/sccache.sh
 
 ENV RUST_CONFIGURE_ARGS --build=i686-unknown-linux-gnu
-ARG SCRIPT_ARG
 COPY scripts/stage_2_test_set1.sh /scripts/
 COPY scripts/stage_2_test_set2.sh /scripts/
-ENV SCRIPT /scripts/${SCRIPT_ARG}
+ENV SCRIPT "Must specify DOCKER_SCRIPT for this image"
diff --git a/src/ci/docker/host-x86_64/pr-check-1/Dockerfile b/src/ci/docker/host-x86_64/pr-check-1/Dockerfile
index 8bbcc18e2be..d3c3cd1b63e 100644
--- a/src/ci/docker/host-x86_64/pr-check-1/Dockerfile
+++ b/src/ci/docker/host-x86_64/pr-check-1/Dockerfile
@@ -27,10 +27,6 @@ COPY scripts/nodejs.sh /scripts/
 RUN sh /scripts/nodejs.sh /node
 ENV PATH="/node/bin:${PATH}"
 
-# Install es-check
-# Pin its version to prevent unrelated CI failures due to future es-check versions.
-RUN npm install es-check@6.1.1 eslint@8.6.0 typescript@5.7.3 -g
-
 COPY scripts/sccache.sh /scripts/
 RUN sh /scripts/sccache.sh
 
@@ -52,7 +48,4 @@ ENV SCRIPT \
   python3 ../x.py check --set build.optimized-compiler-builtins=false core alloc std --target=aarch64-unknown-linux-gnu,i686-pc-windows-msvc,i686-unknown-linux-gnu,x86_64-apple-darwin,x86_64-pc-windows-gnu,x86_64-pc-windows-msvc && \
   /scripts/validate-toolstate.sh && \
   reuse --include-submodules lint && \
-  python3 ../x.py test collect-license-metadata && \
-  # Runs checks to ensure that there are no issues in our JS code.
-  es-check es2019 ../src/librustdoc/html/static/js/*.js && \
-  tsc --project ../src/librustdoc/html/static/js/tsconfig.json
+  python3 ../x.py test collect-license-metadata
diff --git a/src/ci/docker/host-x86_64/test-various/Dockerfile b/src/ci/docker/host-x86_64/test-various/Dockerfile
index 8d2e45ae497..4d09bea69c0 100644
--- a/src/ci/docker/host-x86_64/test-various/Dockerfile
+++ b/src/ci/docker/host-x86_64/test-various/Dockerfile
@@ -65,14 +65,14 @@ ENV WASM_SCRIPT python3 /checkout/x.py --stage 2 test --host='' --target $WASM_T
   tests/ui \
   tests/mir-opt \
   tests/codegen-units \
-  tests/codegen \
-  tests/assembly \
+  tests/codegen-llvm \
+  tests/assembly-llvm \
   library/core
 
 ENV NVPTX_TARGETS=nvptx64-nvidia-cuda
 ENV NVPTX_SCRIPT python3 /checkout/x.py --stage 2 test --host='' --target $NVPTX_TARGETS \
   tests/run-make \
-  tests/assembly
+  tests/assembly-llvm
 
 ENV MUSL_TARGETS=x86_64-unknown-linux-musl \
     CC_x86_64_unknown_linux_musl=x86_64-linux-musl-gcc \
diff --git a/src/ci/docker/host-x86_64/tidy/Dockerfile b/src/ci/docker/host-x86_64/tidy/Dockerfile
index dbb950cbe0c..ee1ae5410ee 100644
--- a/src/ci/docker/host-x86_64/tidy/Dockerfile
+++ b/src/ci/docker/host-x86_64/tidy/Dockerfile
@@ -45,4 +45,4 @@ RUN bash -c 'npm install -g eslint@$(cat /tmp/eslint.version)'
 # NOTE: intentionally uses python2 for x.py so we can test it still works.
 # validate-toolstate only runs in our CI, so it's ok for it to only support python3.
 ENV SCRIPT TIDY_PRINT_DIFF=1 python2.7 ../x.py test --stage 0 \
-  src/tools/tidy tidyselftest --extra-checks=py,cpp
+  src/tools/tidy tidyselftest --extra-checks=py,cpp,js
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-19/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-19/Dockerfile
index c09be047c6a..5cba7c564f1 100644
--- a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-19/Dockerfile
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-19/Dockerfile
@@ -57,12 +57,10 @@ ENV RUST_CONFIGURE_ARGS \
 
 COPY scripts/shared.sh /scripts/
 
-ARG SCRIPT_ARG
+COPY scripts/x86_64-gnu-llvm.sh /scripts/
+COPY scripts/x86_64-gnu-llvm2.sh /scripts/
+COPY scripts/x86_64-gnu-llvm3.sh /scripts/
+COPY scripts/stage_2_test_set1.sh /scripts/
+COPY scripts/stage_2_test_set2.sh /scripts/
 
-COPY scripts/x86_64-gnu-llvm.sh /tmp/
-COPY scripts/x86_64-gnu-llvm2.sh /tmp/
-COPY scripts/x86_64-gnu-llvm3.sh /tmp/
-COPY scripts/stage_2_test_set1.sh /tmp/
-COPY scripts/stage_2_test_set2.sh /tmp/
-
-ENV SCRIPT "/tmp/${SCRIPT_ARG}"
+ENV SCRIPT "Must specify DOCKER_SCRIPT for this image"
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-20/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-20/Dockerfile
index 83a3bfb37a5..92c2631000f 100644
--- a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-20/Dockerfile
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-20/Dockerfile
@@ -57,12 +57,10 @@ ENV RUST_CONFIGURE_ARGS \
 
 COPY scripts/shared.sh /scripts/
 
-ARG SCRIPT_ARG
+COPY scripts/x86_64-gnu-llvm.sh /scripts/
+COPY scripts/x86_64-gnu-llvm2.sh /scripts/
+COPY scripts/x86_64-gnu-llvm3.sh /scripts/
+COPY scripts/stage_2_test_set1.sh /scripts/
+COPY scripts/stage_2_test_set2.sh /scripts/
 
-COPY scripts/x86_64-gnu-llvm.sh /tmp/
-COPY scripts/x86_64-gnu-llvm2.sh /tmp/
-COPY scripts/x86_64-gnu-llvm3.sh /tmp/
-COPY scripts/stage_2_test_set1.sh /tmp/
-COPY scripts/stage_2_test_set2.sh /tmp/
-
-ENV SCRIPT "/tmp/${SCRIPT_ARG}"
+ENV SCRIPT "Must specify DOCKER_SCRIPT for this image"
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-miri/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-miri/Dockerfile
index b937bc3e678..ad2ee85c7bb 100644
--- a/src/ci/docker/host-x86_64/x86_64-gnu-miri/Dockerfile
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-miri/Dockerfile
@@ -46,12 +46,4 @@ ENV HOST_TARGET x86_64-unknown-linux-gnu
 
 COPY scripts/shared.sh /scripts/
 
-# For now, we need to use `--unsafe-perm=true` to go around an issue when npm tries
-# to create a new folder. For reference:
-# https://github.com/puppeteer/puppeteer/issues/375
-#
-# We also specify the version in case we need to update it to go around cache limitations.
-#
-# The `browser-ui-test.version` file is also used by bootstrap to emit warnings in case
-# the local version of the package is different than the one used by the CI.
 ENV SCRIPT /tmp/check-miri.sh ../x.py
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile
index e770c58bd9c..95357d22937 100644
--- a/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile
@@ -76,8 +76,6 @@ COPY scripts/nodejs.sh /scripts/
 RUN sh /scripts/nodejs.sh /node
 ENV PATH="/node/bin:${PATH}"
 
-COPY host-x86_64/x86_64-gnu-tools/browser-ui-test.version /tmp/
-
 ENV RUST_CONFIGURE_ARGS \
   --build=x86_64-unknown-linux-gnu \
   --save-toolstates=/tmp/toolstate/toolstates.json \
@@ -91,15 +89,6 @@ ENV HOST_TARGET x86_64-unknown-linux-gnu
 
 COPY scripts/shared.sh /scripts/
 
-# For now, we need to use `--unsafe-perm=true` to go around an issue when npm tries
-# to create a new folder. For reference:
-# https://github.com/puppeteer/puppeteer/issues/375
-#
-# We also specify the version in case we need to update it to go around cache limitations.
-#
-# The `browser-ui-test.version` file is also used by bootstrap to emit warnings in case
-# the local version of the package is different than the one used by the CI.
 ENV SCRIPT /tmp/checktools.sh ../x.py && \
-  npm install browser-ui-test@$(head -n 1 /tmp/browser-ui-test.version) --unsafe-perm=true && \
   python3 ../x.py check compiletest --set build.compiletest-use-stage0-libtest=true && \
   python3 ../x.py test tests/rustdoc-gui --stage 2 --test-args "'--jobs 1'"
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-tools/browser-ui-test.version b/src/ci/docker/host-x86_64/x86_64-gnu-tools/browser-ui-test.version
deleted file mode 100644
index b9f8e558df4..00000000000
--- a/src/ci/docker/host-x86_64/x86_64-gnu-tools/browser-ui-test.version
+++ /dev/null
@@ -1 +0,0 @@
-0.21.1
\ No newline at end of file
diff --git a/src/ci/docker/run.sh b/src/ci/docker/run.sh
index 4e69fb2f370..044f5a8fff3 100755
--- a/src/ci/docker/run.sh
+++ b/src/ci/docker/run.sh
@@ -114,14 +114,6 @@ if [ -f "$docker_dir/$image/Dockerfile" ]; then
         "$context"
     )
 
-    # If the environment variable DOCKER_SCRIPT is defined,
-    # set the build argument SCRIPT_ARG to DOCKER_SCRIPT.
-    # In this way, we run the script defined in CI,
-    # instead of the one defined in the Dockerfile.
-    if [ -n "${DOCKER_SCRIPT+x}" ]; then
-      build_args+=("--build-arg" "SCRIPT_ARG=${DOCKER_SCRIPT}")
-    fi
-
     GHCR_BUILDKIT_IMAGE="ghcr.io/rust-lang/buildkit:buildx-stable-1"
     # On non-CI jobs, we try to download a pre-built image from the rust-lang-ci
     # ghcr.io registry. If it is not possible, we fall back to building the image
@@ -341,6 +333,10 @@ if [ "$ENABLE_GCC_CODEGEN" = "1" ]; then
   echo "Setting extra environment values for docker: $extra_env"
 fi
 
+if [ -n "${DOCKER_SCRIPT}" ]; then
+  extra_env="$extra_env --env SCRIPT=\"/scripts/${DOCKER_SCRIPT}\""
+fi
+
 docker \
   run \
   --workdir /checkout/obj \
@@ -361,7 +357,7 @@ docker \
   --env TOOLSTATE_REPO \
   --env TOOLSTATE_PUBLISH \
   --env RUST_CI_OVERRIDE_RELEASE_CHANNEL \
-  --env CI_JOB_NAME="${CI_JOB_NAME-$IMAGE}" \
+  --env CI_JOB_NAME="${CI_JOB_NAME-$image}" \
   --env CI_JOB_DOC_URL="${CI_JOB_DOC_URL}" \
   --env BASE_COMMIT="$BASE_COMMIT" \
   --env DIST_TRY_BUILD \
diff --git a/src/ci/docker/scripts/i686-gnu-nopt-2.sh b/src/ci/docker/scripts/i686-gnu-nopt-2.sh
new file mode 100755
index 00000000000..4c171739daf
--- /dev/null
+++ b/src/ci/docker/scripts/i686-gnu-nopt-2.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+set -ex
+
+python3 ../x.py test --stage 1 --set rust.optimize=false library/std &&
+/scripts/stage_2_test_set2.sh
diff --git a/src/ci/docker/scripts/x86_64-gnu-llvm2.sh b/src/ci/docker/scripts/x86_64-gnu-llvm2.sh
index fe5382aaa48..0060b9bfd23 100755
--- a/src/ci/docker/scripts/x86_64-gnu-llvm2.sh
+++ b/src/ci/docker/scripts/x86_64-gnu-llvm2.sh
@@ -4,7 +4,7 @@ set -ex
 
 ##### Test stage 2 #####
 
-/tmp/stage_2_test_set1.sh
+/scripts/stage_2_test_set1.sh
 
 # Run the `mir-opt` tests again but this time for a 32-bit target.
 # This enforces that tests using `// EMIT_MIR_FOR_EACH_BIT_WIDTH` have
diff --git a/src/ci/github-actions/jobs.yml b/src/ci/github-actions/jobs.yml
index 01993ad28aa..e16f00547c1 100644
--- a/src/ci/github-actions/jobs.yml
+++ b/src/ci/github-actions/jobs.yml
@@ -34,6 +34,8 @@ runners:
     os: windows-2022
     <<: *base-job
 
+  # NOTE: windows-2025 has less disk space available than windows-2022,
+  # because the D drive is missing.
   - &job-windows-25
     os: windows-2025
     <<: *base-job
@@ -46,6 +48,10 @@ runners:
     os: windows-2025-8core-32gb
     <<: *base-job
 
+  - &job-windows-aarch64
+    os: windows-11-arm
+    <<: *base-job
+
   - &job-aarch64-linux
     # Free some disk space to avoid running out of space during the build.
     free_disk: true
@@ -166,9 +172,9 @@ try:
 optional:
   # This job is used just to test optional jobs.
   # It will be replaced by tier 2 and tier 3 jobs in the future.
-  - name: optional-mingw-check-1
+  - name: optional-pr-check-1
     env:
-      IMAGE: mingw-check-1
+      IMAGE: pr-check-1
     <<: *job-linux-4c
 
 # Main CI jobs that have to be green to merge a commit into master
@@ -311,16 +317,14 @@ auto:
   - name: i686-gnu-nopt-1
     env:
       IMAGE: i686-gnu-nopt
-      DOCKER_SCRIPT: /scripts/stage_2_test_set1.sh
+      DOCKER_SCRIPT: stage_2_test_set1.sh
     <<: *job-linux-4c
 
   # Skip tests that run in i686-gnu-nopt-1
   - name: i686-gnu-nopt-2
     env:
       IMAGE: i686-gnu-nopt
-      DOCKER_SCRIPT: >-
-        python3 ../x.py test --stage 1 --set rust.optimize=false library/std &&
-        /scripts/stage_2_test_set2.sh
+      DOCKER_SCRIPT: i686-gnu-nopt-2.sh
     <<: *job-linux-4c
 
   - name: pr-check-1
@@ -474,7 +478,7 @@ auto:
       NO_LLVM_ASSERTIONS: 1
       NO_DEBUG_ASSERTIONS: 1
       NO_OVERFLOW_CHECKS: 1
-    <<: *job-macos
+    <<: *job-macos-m1
 
   - name: x86_64-apple-1
     env:
@@ -540,13 +544,13 @@ auto:
     env:
       RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --enable-sanitizers --enable-profiler
       SCRIPT: make ci-msvc-py
-    <<: *job-windows-25
+    <<: *job-windows
 
   - name: x86_64-msvc-2
     env:
       RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --enable-sanitizers --enable-profiler
       SCRIPT: make ci-msvc-ps1
-    <<: *job-windows-25
+    <<: *job-windows
 
   # i686-msvc is split into two jobs to run tests in parallel.
   - name: i686-msvc-1
@@ -561,6 +565,19 @@ auto:
       SCRIPT: make ci-msvc-ps1
     <<: *job-windows
 
+  # aarch64-msvc is split into two jobs to run tests in parallel.
+  - name: aarch64-msvc-1
+    env:
+      RUST_CONFIGURE_ARGS: --build=aarch64-pc-windows-msvc
+      SCRIPT: make ci-msvc-py
+    <<: *job-windows-aarch64
+
+  - name: aarch64-msvc-2
+    env:
+      RUST_CONFIGURE_ARGS: --build=aarch64-pc-windows-msvc
+      SCRIPT: make ci-msvc-ps1
+    <<: *job-windows-aarch64
+
   # x86_64-msvc-ext is split into multiple jobs to run tests in parallel.
   - name: x86_64-msvc-ext1
     env:
@@ -656,14 +673,14 @@ auto:
   - name: dist-aarch64-msvc
     env:
       RUST_CONFIGURE_ARGS: >-
-        --build=x86_64-pc-windows-msvc
+        --build=aarch64-pc-windows-msvc
         --host=aarch64-pc-windows-msvc
         --target=aarch64-pc-windows-msvc,arm64ec-pc-windows-msvc
         --enable-full-tools
         --enable-profiler
       SCRIPT: python x.py dist bootstrap --include-default-paths
       DIST_REQUIRE_ALL_TOOLS: 1
-    <<: *job-windows
+    <<: *job-windows-aarch64
 
   - name: dist-i686-mingw
     env:
diff --git a/src/ci/scripts/install-clang.sh b/src/ci/scripts/install-clang.sh
index a9528e92915..657e1492a6d 100755
--- a/src/ci/scripts/install-clang.sh
+++ b/src/ci/scripts/install-clang.sh
@@ -56,9 +56,19 @@ elif isWindows && ! isKnownToBeMingwBuild; then
 
     mkdir -p citools/clang-rust
     cd citools
-    retry curl -f "${MIRRORS_BASE}/LLVM-${LLVM_VERSION}-win64.exe" \
-        -o "LLVM-${LLVM_VERSION}-win64.exe"
-    7z x -oclang-rust/ "LLVM-${LLVM_VERSION}-win64.exe"
+
+    if [[ "${CI_JOB_NAME}" = *aarch64* ]]; then
+        suffix=woa64
+
+        # On Arm64, the Ring crate requires that Clang be on the PATH.
+        # https://github.com/briansmith/ring/blob/main/BUILDING.md
+        ciCommandAddPath "$(cygpath -m "$(pwd)/clang-rust/bin")"
+    else
+        suffix=win64
+    fi
+    retry curl -f "${MIRRORS_BASE}/LLVM-${LLVM_VERSION}-${suffix}.exe" \
+        -o "LLVM-${LLVM_VERSION}-${suffix}.exe"
+    7z x -oclang-rust/ "LLVM-${LLVM_VERSION}-${suffix}.exe"
     ciCommandSetEnv RUST_CONFIGURE_ARGS \
         "${RUST_CONFIGURE_ARGS} --set llvm.clang-cl=$(pwd)/clang-rust/bin/clang-cl.exe"
 
diff --git a/src/ci/scripts/install-mingw.sh b/src/ci/scripts/install-mingw.sh
index ad852071f29..ed87628659b 100755
--- a/src/ci/scripts/install-mingw.sh
+++ b/src/ci/scripts/install-mingw.sh
@@ -43,4 +43,9 @@ if isWindows && isKnownToBeMingwBuild; then
     curl -o mingw.7z "${MIRRORS_BASE}/${mingw_archive}"
     7z x -y mingw.7z > /dev/null
     ciCommandAddPath "$(cygpath -m "$(pwd)/${mingw_dir}/bin")"
+
+    # Initialize mingw for the user.
+    # This should be done by github but isn't for some reason.
+    # (see https://github.com/actions/runner-images/issues/12600)
+    /c/msys64/usr/bin/bash -lc ' '
 fi
diff --git a/src/ci/scripts/install-rust.sh b/src/ci/scripts/install-rust.sh
new file mode 100755
index 00000000000..e4aee98c9fb
--- /dev/null
+++ b/src/ci/scripts/install-rust.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# The Arm64 Windows Runner does not have Rust already installed
+# https://github.com/actions/partner-runner-images/issues/77
+
+set -euo pipefail
+IFS=$'\n\t'
+
+source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
+
+if [[ "${CI_JOB_NAME}" = *aarch64* ]] && isWindows; then
+    curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | \
+    sh -s -- -y -q --default-host aarch64-pc-windows-msvc
+    ciCommandAddPath "${USERPROFILE}/.cargo/bin"
+fi
diff --git a/src/doc/book b/src/doc/book
-Subproject ef1ce8f87a8b18feb1b6a9cf9a4939a79bde679
+Subproject b2d1a0821e12a676b496d61891b8e3d374a8e83
diff --git a/src/doc/embedded-book b/src/doc/embedded-book
-Subproject 41f688a598a5022b749e23d37f3c524f6a0b28e
+Subproject fe88fbb68391a465680dd91109f0a151a1676f3
diff --git a/src/doc/nomicon b/src/doc/nomicon
-Subproject 8b61acfaea822e9ac926190bc8f15791c33336e
+Subproject 3ff384320598bbe8d8cfe5cb8f18f78a3a3e6b1
diff --git a/src/doc/reference b/src/doc/reference
-Subproject e9fc99f107840813916f62e16b3f6d9556e1f2d
+Subproject 1f45bd41fa6c17b7c048ed6bfe5f168c4311206
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
-Subproject 288b4e4948add43f387cad35adc7b1c54ca6fe1
+Subproject e386be5f44af711854207c11fdd61bb576270b0
diff --git a/src/doc/rustc-dev-guide/.github/workflows/rustc-pull.yml b/src/doc/rustc-dev-guide/.github/workflows/rustc-pull.yml
index 1e430d8b4e6..ad570ee4595 100644
--- a/src/doc/rustc-dev-guide/.github/workflows/rustc-pull.yml
+++ b/src/doc/rustc-dev-guide/.github/workflows/rustc-pull.yml
@@ -9,106 +9,12 @@ on:
 jobs:
   pull:
     if: github.repository == 'rust-lang/rustc-dev-guide'
-    runs-on: ubuntu-latest
-    outputs:
-      pr_url: ${{ steps.update-pr.outputs.pr_url }}
-    permissions:
-      contents: write
-      pull-requests: write
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          # We need the full history for josh to work
-          fetch-depth: '0'
-      - name: Install stable Rust toolchain
-        run: rustup update stable
-      - uses: Swatinem/rust-cache@v2
-        with:
-          workspaces: "josh-sync"
-          # Cache the josh directory with checked out rustc
-          cache-directories: "/home/runner/.cache/rustc-dev-guide-josh"
-      - name: Install josh
-        run: RUSTFLAGS="--cap-lints warn" cargo install josh-proxy --git https://github.com/josh-project/josh --tag r24.10.04
-      - name: Setup bot git name and email
-        run: |
-          git config --global user.name 'The rustc-dev-guide Cronjob Bot'
-          git config --global user.email 'github-actions@github.com'
-      - name: Perform rustc-pull
-        id: rustc-pull
-        # Turn off -e to disable early exit
-        shell: bash {0}
-        run: |
-          cargo run --manifest-path josh-sync/Cargo.toml -- rustc-pull
-          exitcode=$?
-
-          # If no pull was performed, we want to mark this job as successful,
-          # but we do not want to perform the follow-up steps.
-          if [ $exitcode -eq 0 ]; then
-            echo "pull_result=pull-finished" >> $GITHUB_OUTPUT
-          elif [ $exitcode -eq 2 ]; then
-            echo "pull_result=skipped" >> $GITHUB_OUTPUT
-            exitcode=0
-          fi
-
-          exit ${exitcode}
-      - name: Push changes to a branch
-        if: ${{ steps.rustc-pull.outputs.pull_result == 'pull-finished' }}
-        run: |
-          # Update a sticky branch that is used only for rustc pulls
-          BRANCH="rustc-pull"
-          git switch -c $BRANCH
-          git push -u origin $BRANCH --force
-      - name: Create pull request
-        id: update-pr
-        if: ${{ steps.rustc-pull.outputs.pull_result == 'pull-finished' }}
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          # Check if an open pull request for an rustc pull update already exists
-          # If it does, the previous push has just updated it
-          # If not, we create it now
-          RESULT=`gh pr list --author github-actions[bot] --state open -q 'map(select(.title=="Rustc pull update")) | length' --json title`
-          if [[ "$RESULT" -eq 0 ]]; then
-            echo "Creating new pull request"
-            PR_URL=`gh pr create -B master --title 'Rustc pull update' --body 'Latest update from rustc.'`
-            echo "pr_url=$PR_URL" >> $GITHUB_OUTPUT
-          else
-            PR_URL=`gh pr list --author github-actions[bot] --state open -q 'map(select(.title=="Rustc pull update")) | .[0].url' --json url,title`
-            echo "Updating pull request ${PR_URL}"
-            echo "pr_url=$PR_URL" >> $GITHUB_OUTPUT
-          fi
-  send-zulip-message:
-    needs: [pull]
-    if: ${{ !cancelled() }}
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - name: Compute message
-        id: create-message
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          if [ "${{ needs.pull.result }}" == "failure" ]; then
-            WORKFLOW_URL="${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
-            echo "message=Rustc pull sync failed. Check out the [workflow URL]($WORKFLOW_URL)." >> $GITHUB_OUTPUT
-          else
-            CREATED_AT=`gh pr list --author github-actions[bot] --state open -q 'map(select(.title=="Rustc pull update")) | .[0].createdAt' --json createdAt,title`
-            PR_URL=`gh pr list --author github-actions[bot] --state open -q 'map(select(.title=="Rustc pull update")) | .[0].url' --json url,title`
-            week_ago=$(date +%F -d '7 days ago')
-
-            # If there is an open PR that is at least a week old, post a message about it
-            if [[ -n $DATE_GH && $DATE_GH < $week_ago ]]; then
-              echo "message=A PR with a Rustc pull has been opened for more a week. Check out the [PR](${PR_URL})." >> $GITHUB_OUTPUT
-            fi
-          fi
-      - name: Send a Zulip message about updated PR
-        if: ${{ steps.create-message.outputs.message != '' }}
-        uses: zulip/github-actions-zulip/send-message@e4c8f27c732ba9bd98ac6be0583096dea82feea5
-        with:
-          api-key: ${{ secrets.ZULIP_API_TOKEN }}
-          email: "rustc-dev-guide-gha-notif-bot@rust-lang.zulipchat.com"
-          organization-url: "https://rust-lang.zulipchat.com"
-          to: 196385
-          type: "stream"
-          topic: "Subtree sync automation"
-          content: ${{ steps.create-message.outputs.message }}
+    uses: rust-lang/josh-sync/.github/workflows/rustc-pull.yml@main
+    with:
+      zulip-stream-id: 196385
+      zulip-bot-email:  "rustc-dev-guide-gha-notif-bot@rust-lang.zulipchat.com"
+      pr-base-branch: master
+      branch-name: rustc-pull
+    secrets:
+      zulip-api-token: ${{ secrets.ZULIP_API_TOKEN }}
+      token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/src/doc/rustc-dev-guide/README.md b/src/doc/rustc-dev-guide/README.md
index 0425c15f83c..5932da467ab 100644
--- a/src/doc/rustc-dev-guide/README.md
+++ b/src/doc/rustc-dev-guide/README.md
@@ -72,49 +72,6 @@ including the `<!-- toc -->` marker at the place where you want the TOC.
 
 ## Synchronizing josh subtree with rustc
 
-This repository is linked to `rust-lang/rust` as a [josh](https://josh-project.github.io/josh/intro.html) subtree. You can use the following commands to synchronize the subtree in both directions.
+This repository is linked to `rust-lang/rust` as a [josh](https://josh-project.github.io/josh/intro.html) subtree. You can use the [rustc-josh-sync](https://github.com/rust-lang/josh-sync) tool to perform synchronization.
 
-You'll need to install `josh-proxy` locally via
-
-```
-cargo install josh-proxy --git https://github.com/josh-project/josh --tag r24.10.04
-```
-Older versions of `josh-proxy` may not round trip commits losslessly so it is important to install this exact version.
-
-### Pull changes from `rust-lang/rust` into this repository
-
-1) Checkout a new branch that will be used to create a PR into `rust-lang/rustc-dev-guide`
-2) Run the pull command
-    ```
-    cargo run --manifest-path josh-sync/Cargo.toml rustc-pull
-    ```
-3) Push the branch to your fork and create a PR into `rustc-dev-guide`
-
-### Push changes from this repository into `rust-lang/rust`
-
-NOTE: If you use Git protocol to push to your fork of `rust-lang/rust`,
-ensure that you have this entry in your Git config,
-else the 2 steps that follow would prompt for a username and password:
-
-```
-[url "git@github.com:"]
-insteadOf = "https://github.com/"
-```
-
-1) Run the push command to create a branch named `<branch-name>` in a `rustc` fork under the `<gh-username>` account
-    ```
-    cargo run --manifest-path josh-sync/Cargo.toml rustc-push <branch-name> <gh-username>
-    ```
-2) Create a PR from `<branch-name>` into `rust-lang/rust`
-
-#### Minimal git config
-
-For simplicity (ease of implementation purposes), the josh-sync script simply calls out to system git. This means that the git invocation may be influenced by global (or local) git configuration.
-
-You may observe "Nothing to pull" even if you *know* rustc-pull has something to pull if your global git config sets `fetch.prunetags = true` (and possibly other configurations may cause unexpected outcomes).
-
-To minimize the likelihood of this happening, you may wish to keep a separate *minimal* git config that *only* has `[user]` entries from global git config, then repoint system git to use the minimal git config instead. E.g.
-
-```
-GIT_CONFIG_GLOBAL=/path/to/minimal/gitconfig GIT_CONFIG_SYSTEM='' cargo run --manifest-path josh-sync/Cargo.toml -- rustc-pull
-```
+You can find a guide on how to perform the synchronization [here](./src/external-repos.md#synchronizing-a-josh-subtree).
diff --git a/src/doc/rustc-dev-guide/josh-sync/Cargo.lock b/src/doc/rustc-dev-guide/josh-sync/Cargo.lock
deleted file mode 100644
index a8183a740db..00000000000
--- a/src/doc/rustc-dev-guide/josh-sync/Cargo.lock
+++ /dev/null
@@ -1,430 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-version = 4
-
-[[package]]
-name = "anstream"
-version = "0.6.18"
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-dependencies = [
- "anstyle",
- "anstyle-parse",
- "anstyle-query",
- "anstyle-wincon",
- "colorchoice",
- "is_terminal_polyfill",
- "utf8parse",
-]
-
-[[package]]
-name = "anstyle"
-version = "1.0.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55cc3b69f167a1ef2e161439aa98aed94e6028e5f9a59be9a6ffb47aef1651f9"
-
-[[package]]
-name = "anstyle-parse"
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-checksum = "3b2d16507662817a6a20a9ea92df6652ee4f94f914589377d69f3b21bc5798a9"
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-
-[[package]]
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-
-[[package]]
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-
-[[package]]
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-
-[[package]]
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-
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-checksum = "3135e7ec2ef7b10c6ed8950f0f792ed96ee093fa088608f1c76e569722700c84"
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- "clap_builder",
- "clap_derive",
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-
-[[package]]
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-version = "4.5.23"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30582fc632330df2bd26877bde0c1f4470d57c582bbc070376afcd04d8cb4838"
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- "anstyle",
- "clap_lex",
- "strsim",
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-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ac6a0c7b1a9e9a5186361f67dfa1b88213572f427fb9ab038efb2bd8c582dab"
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- "heck",
- "proc-macro2",
- "quote",
- "syn",
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-
-[[package]]
-name = "clap_lex"
-version = "0.7.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f46ad14479a25103f283c0f10005961cf086d8dc42205bb44c46ac563475dca6"
-
-[[package]]
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-version = "1.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b63caa9aa9397e2d9480a9b13673856c78d8ac123288526c37d7839f2a86990"
-
-[[package]]
-name = "directories"
-version = "5.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a49173b84e034382284f27f1af4dcbbd231ffa358c0fe316541a7337f376a35"
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-dependencies = [
- "libc",
- "option-ext",
- "redox_users",
- "windows-sys 0.48.0",
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-
-[[package]]
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- "wasi",
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-
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-
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-
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-
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-dependencies = [
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diff --git a/src/doc/rustc-dev-guide/josh-sync/Cargo.toml b/src/doc/rustc-dev-guide/josh-sync/Cargo.toml
deleted file mode 100644
index 1f8bf2a0093..00000000000
--- a/src/doc/rustc-dev-guide/josh-sync/Cargo.toml
+++ /dev/null
@@ -1,9 +0,0 @@
-[package]
-name = "josh-sync"
-edition = "2024"
-
-[dependencies]
-anyhow = "1.0.95"
-clap = { version = "4.5.21", features = ["derive"] }
-directories = "5"
-xshell = "0.2.6"
diff --git a/src/doc/rustc-dev-guide/josh-sync/README.md b/src/doc/rustc-dev-guide/josh-sync/README.md
deleted file mode 100644
index a3dd876e8b8..00000000000
--- a/src/doc/rustc-dev-guide/josh-sync/README.md
+++ /dev/null
@@ -1,4 +0,0 @@
-# Git josh sync
-This utility serves for syncing the josh git subtree to and from the rust-lang/rust repository.
-
-See CLI help for usage.
diff --git a/src/doc/rustc-dev-guide/josh-sync/src/main.rs b/src/doc/rustc-dev-guide/josh-sync/src/main.rs
deleted file mode 100644
index aeedee5be22..00000000000
--- a/src/doc/rustc-dev-guide/josh-sync/src/main.rs
+++ /dev/null
@@ -1,41 +0,0 @@
-use clap::Parser;
-
-use crate::sync::{GitSync, RustcPullError};
-
-mod sync;
-
-#[derive(clap::Parser)]
-enum Args {
-    /// Pull changes from the main `rustc` repository.
-    /// This creates new commits that should be then merged into `rustc-dev-guide`.
-    RustcPull,
-    /// Push changes from `rustc-dev-guide` to the given `branch` of a `rustc` fork under the given
-    /// GitHub `username`.
-    /// The pushed branch should then be merged into the `rustc` repository.
-    RustcPush { branch: String, github_username: String },
-}
-
-fn main() -> anyhow::Result<()> {
-    let args = Args::parse();
-    let sync = GitSync::from_current_dir()?;
-    match args {
-        Args::RustcPull => {
-            if let Err(error) = sync.rustc_pull(None) {
-                match error {
-                    RustcPullError::NothingToPull => {
-                        eprintln!("Nothing to pull");
-                        std::process::exit(2);
-                    }
-                    RustcPullError::PullFailed(error) => {
-                        eprintln!("Pull failure: {error:?}");
-                        std::process::exit(1);
-                    }
-                }
-            }
-        }
-        Args::RustcPush { github_username, branch } => {
-            sync.rustc_push(github_username, branch)?;
-        }
-    }
-    Ok(())
-}
diff --git a/src/doc/rustc-dev-guide/josh-sync/src/sync.rs b/src/doc/rustc-dev-guide/josh-sync/src/sync.rs
deleted file mode 100644
index ed38d1403a0..00000000000
--- a/src/doc/rustc-dev-guide/josh-sync/src/sync.rs
+++ /dev/null
@@ -1,275 +0,0 @@
-use std::io::Write;
-use std::ops::Not;
-use std::path::PathBuf;
-use std::time::Duration;
-use std::{env, net, process};
-
-use anyhow::{Context, anyhow, bail};
-use xshell::{Shell, cmd};
-
-/// Used for rustc syncs.
-const JOSH_FILTER: &str = ":/src/doc/rustc-dev-guide";
-const JOSH_PORT: u16 = 42042;
-const UPSTREAM_REPO: &str = "rust-lang/rust";
-
-pub enum RustcPullError {
-    /// No changes are available to be pulled.
-    NothingToPull,
-    /// A rustc-pull has failed, probably a git operation error has occurred.
-    PullFailed(anyhow::Error),
-}
-
-impl<E> From<E> for RustcPullError
-where
-    E: Into<anyhow::Error>,
-{
-    fn from(error: E) -> Self {
-        Self::PullFailed(error.into())
-    }
-}
-
-pub struct GitSync {
-    dir: PathBuf,
-}
-
-/// This code was adapted from the miri repository
-/// (https://github.com/rust-lang/miri/blob/6a68a79f38064c3bc30617cca4bdbfb2c336b140/miri-script/src/commands.rs#L236).
-impl GitSync {
-    pub fn from_current_dir() -> anyhow::Result<Self> {
-        Ok(Self { dir: std::env::current_dir()? })
-    }
-
-    pub fn rustc_pull(&self, commit: Option<String>) -> Result<(), RustcPullError> {
-        let sh = Shell::new()?;
-        sh.change_dir(&self.dir);
-        let commit = commit.map(Ok).unwrap_or_else(|| {
-            let rust_repo_head =
-                cmd!(sh, "git ls-remote https://github.com/{UPSTREAM_REPO}/ HEAD").read()?;
-            rust_repo_head
-                .split_whitespace()
-                .next()
-                .map(|front| front.trim().to_owned())
-                .ok_or_else(|| anyhow!("Could not obtain Rust repo HEAD from remote."))
-        })?;
-        // Make sure the repo is clean.
-        if cmd!(sh, "git status --untracked-files=no --porcelain").read()?.is_empty().not() {
-            return Err(anyhow::anyhow!(
-                "working directory must be clean before performing rustc pull"
-            )
-            .into());
-        }
-        // Make sure josh is running.
-        let josh = Self::start_josh()?;
-        let josh_url =
-            format!("http://localhost:{JOSH_PORT}/{UPSTREAM_REPO}.git@{commit}{JOSH_FILTER}.git");
-
-        let previous_base_commit = sh.read_file("rust-version")?.trim().to_string();
-        if previous_base_commit == commit {
-            return Err(RustcPullError::NothingToPull);
-        }
-
-        // Update rust-version file. As a separate commit, since making it part of
-        // the merge has confused the heck out of josh in the past.
-        // We pass `--no-verify` to avoid running git hooks.
-        // We do this before the merge so that if there are merge conflicts, we have
-        // the right rust-version file while resolving them.
-        sh.write_file("rust-version", format!("{commit}\n"))?;
-        const PREPARING_COMMIT_MESSAGE: &str = "Preparing for merge from rustc";
-        cmd!(sh, "git commit rust-version --no-verify -m {PREPARING_COMMIT_MESSAGE}")
-            .run()
-            .context("FAILED to commit rust-version file, something went wrong")?;
-
-        // Fetch given rustc commit.
-        cmd!(sh, "git fetch {josh_url}")
-            .run()
-            .inspect_err(|_| {
-                // Try to un-do the previous `git commit`, to leave the repo in the state we found it.
-                cmd!(sh, "git reset --hard HEAD^")
-                    .run()
-                    .expect("FAILED to clean up again after failed `git fetch`, sorry for that");
-            })
-            .context("FAILED to fetch new commits, something went wrong (committing the rust-version file has been undone)")?;
-
-        // This should not add any new root commits. So count those before and after merging.
-        let num_roots = || -> anyhow::Result<u32> {
-            Ok(cmd!(sh, "git rev-list HEAD --max-parents=0 --count")
-                .read()
-                .context("failed to determine the number of root commits")?
-                .parse::<u32>()?)
-        };
-        let num_roots_before = num_roots()?;
-
-        let sha =
-            cmd!(sh, "git rev-parse HEAD").output().context("FAILED to get current commit")?.stdout;
-
-        // Merge the fetched commit.
-        const MERGE_COMMIT_MESSAGE: &str = "Merge from rustc";
-        cmd!(sh, "git merge FETCH_HEAD --no-verify --no-ff -m {MERGE_COMMIT_MESSAGE}")
-            .run()
-            .context("FAILED to merge new commits, something went wrong")?;
-
-        let current_sha =
-            cmd!(sh, "git rev-parse HEAD").output().context("FAILED to get current commit")?.stdout;
-        if current_sha == sha {
-            cmd!(sh, "git reset --hard HEAD^")
-                .run()
-                .expect("FAILED to clean up after creating the preparation commit");
-            eprintln!(
-                "No merge was performed, no changes to pull were found. Rolled back the preparation commit."
-            );
-            return Err(RustcPullError::NothingToPull);
-        }
-
-        // Check that the number of roots did not increase.
-        if num_roots()? != num_roots_before {
-            return Err(anyhow::anyhow!(
-                "Josh created a new root commit. This is probably not the history you want."
-            )
-            .into());
-        }
-
-        drop(josh);
-        Ok(())
-    }
-
-    pub fn rustc_push(&self, github_user: String, branch: String) -> anyhow::Result<()> {
-        let sh = Shell::new()?;
-        sh.change_dir(&self.dir);
-        let base = sh.read_file("rust-version")?.trim().to_owned();
-        // Make sure the repo is clean.
-        if cmd!(sh, "git status --untracked-files=no --porcelain").read()?.is_empty().not() {
-            bail!("working directory must be clean before running `rustc-push`");
-        }
-        // Make sure josh is running.
-        let josh = Self::start_josh()?;
-        let josh_url =
-            format!("http://localhost:{JOSH_PORT}/{github_user}/rust.git{JOSH_FILTER}.git");
-
-        // Find a repo we can do our preparation in.
-        if let Ok(rustc_git) = env::var("RUSTC_GIT") {
-            // If rustc_git is `Some`, we'll use an existing fork for the branch updates.
-            sh.change_dir(rustc_git);
-        } else {
-            // Otherwise, do this in the local repo.
-            println!(
-                "This will pull a copy of the rust-lang/rust history into this checkout, growing it by about 1GB."
-            );
-            print!(
-                "To avoid that, abort now and set the `RUSTC_GIT` environment variable to an existing rustc checkout. Proceed? [y/N] "
-            );
-            std::io::stdout().flush()?;
-            let mut answer = String::new();
-            std::io::stdin().read_line(&mut answer)?;
-            if answer.trim().to_lowercase() != "y" {
-                std::process::exit(1);
-            }
-        };
-        // Prepare the branch. Pushing works much better if we use as base exactly
-        // the commit that we pulled from last time, so we use the `rust-version`
-        // file to find out which commit that would be.
-        println!("Preparing {github_user}/rust (base: {base})...");
-        if cmd!(sh, "git fetch https://github.com/{github_user}/rust {branch}")
-            .ignore_stderr()
-            .read()
-            .is_ok()
-        {
-            println!(
-                "The branch '{branch}' seems to already exist in 'https://github.com/{github_user}/rust'. Please delete it and try again."
-            );
-            std::process::exit(1);
-        }
-        cmd!(sh, "git fetch https://github.com/{UPSTREAM_REPO} {base}").run()?;
-        cmd!(sh, "git push https://github.com/{github_user}/rust {base}:refs/heads/{branch}")
-            .ignore_stdout()
-            .ignore_stderr() // silence the "create GitHub PR" message
-            .run()?;
-        println!();
-
-        // Do the actual push.
-        sh.change_dir(&self.dir);
-        println!("Pushing changes...");
-        cmd!(sh, "git push {josh_url} HEAD:{branch}").run()?;
-        println!();
-
-        // Do a round-trip check to make sure the push worked as expected.
-        cmd!(sh, "git fetch {josh_url} {branch}").ignore_stderr().read()?;
-        let head = cmd!(sh, "git rev-parse HEAD").read()?;
-        let fetch_head = cmd!(sh, "git rev-parse FETCH_HEAD").read()?;
-        if head != fetch_head {
-            bail!(
-                "Josh created a non-roundtrip push! Do NOT merge this into rustc!\n\
-                Expected {head}, got {fetch_head}."
-            );
-        }
-        println!(
-            "Confirmed that the push round-trips back to rustc-dev-guide properly. Please create a rustc PR:"
-        );
-        println!(
-            // Open PR with `subtree update` title to silence the `no-merges` triagebot check
-            "    https://github.com/{UPSTREAM_REPO}/compare/{github_user}:{branch}?quick_pull=1&title=rustc-dev-guide+subtree+update&body=r?+@ghost"
-        );
-
-        drop(josh);
-        Ok(())
-    }
-
-    fn start_josh() -> anyhow::Result<impl Drop> {
-        // Determine cache directory.
-        let local_dir = {
-            let user_dirs =
-                directories::ProjectDirs::from("org", "rust-lang", "rustc-dev-guide-josh").unwrap();
-            user_dirs.cache_dir().to_owned()
-        };
-
-        // Start josh, silencing its output.
-        let mut cmd = process::Command::new("josh-proxy");
-        cmd.arg("--local").arg(local_dir);
-        cmd.arg("--remote").arg("https://github.com");
-        cmd.arg("--port").arg(JOSH_PORT.to_string());
-        cmd.arg("--no-background");
-        cmd.stdout(process::Stdio::null());
-        cmd.stderr(process::Stdio::null());
-        let josh = cmd.spawn().context("failed to start josh-proxy, make sure it is installed")?;
-
-        // Create a wrapper that stops it on drop.
-        struct Josh(process::Child);
-        impl Drop for Josh {
-            fn drop(&mut self) {
-                #[cfg(unix)]
-                {
-                    // Try to gracefully shut it down.
-                    process::Command::new("kill")
-                        .args(["-s", "INT", &self.0.id().to_string()])
-                        .output()
-                        .expect("failed to SIGINT josh-proxy");
-                    // Sadly there is no "wait with timeout"... so we just give it some time to finish.
-                    std::thread::sleep(Duration::from_millis(100));
-                    // Now hopefully it is gone.
-                    if self.0.try_wait().expect("failed to wait for josh-proxy").is_some() {
-                        return;
-                    }
-                }
-                // If that didn't work (or we're not on Unix), kill it hard.
-                eprintln!(
-                    "I have to kill josh-proxy the hard way, let's hope this does not break anything."
-                );
-                self.0.kill().expect("failed to SIGKILL josh-proxy");
-            }
-        }
-
-        // Wait until the port is open. We try every 10ms until 1s passed.
-        for _ in 0..100 {
-            // This will generally fail immediately when the port is still closed.
-            let josh_ready = net::TcpStream::connect_timeout(
-                &net::SocketAddr::from(([127, 0, 0, 1], JOSH_PORT)),
-                Duration::from_millis(1),
-            );
-            if josh_ready.is_ok() {
-                return Ok(Josh(josh));
-            }
-            // Not ready yet.
-            std::thread::sleep(Duration::from_millis(10));
-        }
-        bail!("Even after waiting for 1s, josh-proxy is still not available.")
-    }
-}
diff --git a/src/doc/rustc-dev-guide/rust-version b/src/doc/rustc-dev-guide/rust-version
index e444613e631..f6b7efe51a1 100644
--- a/src/doc/rustc-dev-guide/rust-version
+++ b/src/doc/rustc-dev-guide/rust-version
@@ -1 +1 @@
-c96a69059ecc618b519da385a6ccd03155aa0237
+460259d14de0274b97b8801e08cb2fe5f16fdac5
diff --git a/src/doc/rustc-dev-guide/src/SUMMARY.md b/src/doc/rustc-dev-guide/src/SUMMARY.md
index 7f2f32c62ff..651e2925ad5 100644
--- a/src/doc/rustc-dev-guide/src/SUMMARY.md
+++ b/src/doc/rustc-dev-guide/src/SUMMARY.md
@@ -35,7 +35,6 @@
         - [Cranelift codegen backend](./tests/codegen-backend-tests/cg_clif.md)
         - [GCC codegen backend](./tests/codegen-backend-tests/cg_gcc.md)
     - [Performance testing](./tests/perf.md)
-    - [Suggest tests tool](./tests/suggest-tests.md)
     - [Misc info](./tests/misc.md)
 - [Debugging the compiler](./compiler-debugging.md)
     - [Using the tracing/logging instrumentation](./tracing.md)
diff --git a/src/doc/rustc-dev-guide/src/asm.md b/src/doc/rustc-dev-guide/src/asm.md
index eec9d448b0c..1bb493e73d5 100644
--- a/src/doc/rustc-dev-guide/src/asm.md
+++ b/src/doc/rustc-dev-guide/src/asm.md
@@ -155,9 +155,9 @@ can't know ahead of time whether a function will require a frame/base pointer.
 
 Various tests for inline assembly are available:
 
-- `tests/assembly/asm`
+- `tests/assembly-llvm/asm`
 - `tests/ui/asm`
-- `tests/codegen/asm-*`
+- `tests/codegen-llvm/asm-*`
 
 Every architecture supported by inline assembly must have exhaustive tests in
-`tests/assembly/asm` which test all combinations of register classes and types.
+`tests/assembly-llvm/asm` which test all combinations of register classes and types.
diff --git a/src/doc/rustc-dev-guide/src/autodiff/installation.md b/src/doc/rustc-dev-guide/src/autodiff/installation.md
index c9b28dc43a6..ddbb3a05424 100644
--- a/src/doc/rustc-dev-guide/src/autodiff/installation.md
+++ b/src/doc/rustc-dev-guide/src/autodiff/installation.md
@@ -6,14 +6,14 @@ In the near future, `std::autodiff` should become available in nightly builds fo
 
 First you need to clone and configure the Rust repository:
 ```bash
-git clone --depth=1 git@github.com:rust-lang/rust.git
+git clone git@github.com:rust-lang/rust
 cd rust
 ./configure --enable-llvm-link-shared --enable-llvm-plugins --enable-llvm-enzyme --release-channel=nightly --enable-llvm-assertions --enable-clang --enable-lld --enable-option-checking --enable-ninja --disable-docs
 ```
 
 Afterwards you can build rustc using:
 ```bash
-./x.py build --stage 1 library
+./x build --stage 1 library
 ```
 
 Afterwards rustc toolchain link will allow you to use it through cargo:
@@ -25,10 +25,10 @@ rustup toolchain install nightly # enables -Z unstable-options
 You can then run our test cases:
 
 ```bash
-./x.py test --stage 1 tests/codegen/autodiff
-./x.py test --stage 1 tests/pretty/autodiff
-./x.py test --stage 1 tests/ui/autodiff
-./x.py test --stage 1 tests/ui/feature-gates/feature-gate-autodiff.rs
+./x test --stage 1 tests/codegen-llvm/autodiff
+./x test --stage 1 tests/pretty/autodiff
+./x test --stage 1 tests/ui/autodiff
+./x test --stage 1 tests/ui/feature-gates/feature-gate-autodiff.rs
 ```
 
 Autodiff is still experimental, so if you want to use it in your own projects, you will need to add `lto="fat"` to your Cargo.toml 
@@ -45,7 +45,7 @@ apt install wget vim python3 git curl libssl-dev pkg-config lld ninja-build cmak
 ```
 Then build rustc in a slightly altered way:
 ```bash
-git clone --depth=1 https://github.com/rust-lang/rust.git
+git clone https://github.com/rust-lang/rust
 cd rust
 ./configure --enable-llvm-link-shared --enable-llvm-plugins --enable-llvm-enzyme --release-channel=nightly --enable-llvm-assertions --enable-clang --enable-lld --enable-option-checking --enable-ninja --disable-docs
 ./x dist
@@ -66,7 +66,7 @@ We recommend that approach, if you just want to use any of them and have no expe
 However, if you prefer to just build Enzyme without Rust, then these instructions might help.
 
 ```bash
-git clone --depth=1 git@github.com:llvm/llvm-project.git 
+git clone git@github.com:llvm/llvm-project
 cd llvm-project
 mkdir build
 cd build
@@ -77,7 +77,7 @@ ninja install
 This gives you a working LLVM build, now we can continue with building Enzyme.
 Leave the `llvm-project` folder, and execute the following commands:
 ```bash
-git clone git@github.com:EnzymeAD/Enzyme.git 
+git clone git@github.com:EnzymeAD/Enzyme
 cd Enzyme/enzyme
 mkdir build 
 cd build 
diff --git a/src/doc/rustc-dev-guide/src/building/bootstrapping/debugging-bootstrap.md b/src/doc/rustc-dev-guide/src/building/bootstrapping/debugging-bootstrap.md
index ed267850401..c9c0d64a604 100644
--- a/src/doc/rustc-dev-guide/src/building/bootstrapping/debugging-bootstrap.md
+++ b/src/doc/rustc-dev-guide/src/building/bootstrapping/debugging-bootstrap.md
@@ -168,10 +168,17 @@ For `#[instrument]`, it's recommended to:
 
 ### Profiling bootstrap
 
-You can use the `COMMAND` tracing target to trace execution of most commands spawned by bootstrap. If you also use the `BOOTSTRAP_PROFILE=1` environment variable, bootstrap will generate a Chrome JSON trace file, which can be visualized in Chrome's `chrome://tracing` page or on https://ui.perfetto.dev.
+You can set the `BOOTSTRAP_PROFILE=1` environment variable to enable command execution profiling during bootstrap. This generates:
+
+* A Chrome trace file (for visualization in `chrome://tracing` or [Perfetto](https://ui.perfetto.dev)) if tracing is enabled via `BOOTSTRAP_TRACING=COMMAND=trace`
+* A plain-text summary file, `bootstrap-profile-{pid}.txt`, listing all commands sorted by execution time (slowest first), along with cache hits and working directories
+
+Note: the `.txt` report is always generated when `BOOTSTRAP_PROFILE=1` is set — tracing is not required.
+
+Example usage:
 
 ```bash
-$ BOOTSTRAP_TRACING=COMMAND=trace BOOTSTRAP_PROFILE=1 ./x build library
+$ BOOTSTRAP_PROFILE=1 BOOTSTRAP_TRACING=COMMAND=trace ./x build library
 ```
 
 ### rust-analyzer integration?
diff --git a/src/doc/rustc-dev-guide/src/building/quickstart.md b/src/doc/rustc-dev-guide/src/building/quickstart.md
index 9a8ab353e02..97314d80369 100644
--- a/src/doc/rustc-dev-guide/src/building/quickstart.md
+++ b/src/doc/rustc-dev-guide/src/building/quickstart.md
@@ -61,9 +61,6 @@ and check the output.
 Use `--bless` if you've made a change and want to update the `.stderr` files
 with the new output.
 
-> `./x suggest` can also be helpful for suggesting which tests to run after a
-> change.
-
 Congrats, you are now ready to make a change to the compiler! If you have more
 questions, [the full chapter](./how-to-build-and-run.md) might contain the
 answers, and if it doesn't, feel free to ask for help on
diff --git a/src/doc/rustc-dev-guide/src/building/suggested.md b/src/doc/rustc-dev-guide/src/building/suggested.md
index bfb2f4d1084..c046161e77f 100644
--- a/src/doc/rustc-dev-guide/src/building/suggested.md
+++ b/src/doc/rustc-dev-guide/src/building/suggested.md
@@ -162,7 +162,7 @@ create a `.vim/coc-settings.json`. The settings can be edited with
 [`src/etc/rust_analyzer_settings.json`].
 
 Another way is without a plugin, and creating your own logic in your
-configuration. The following code will work for any checkout of rust-lang/rust (newer than Febuary 2025):
+configuration. The following code will work for any checkout of rust-lang/rust (newer than February 2025):
 
 ```lua
 local function expand_config_variables(option)
@@ -270,23 +270,6 @@ run the tests at some later time. You can then use `git bisect` to track down
 is that you are left with a fairly fine-grained set of commits at the end, all
 of which build and pass tests. This often helps reviewing.
 
-## `x suggest`
-
-The `x suggest` subcommand suggests (and runs) a subset of the extensive
-`rust-lang/rust` tests based on files you have changed. This is especially
-useful for new contributors who have not mastered the arcane `x` flags yet and
-more experienced contributors as a shorthand for reducing mental effort. In all
-cases it is useful not to run the full tests (which can take on the order of
-tens of minutes) and just run a subset which are relevant to your changes. For
-example, running `tidy` and `linkchecker` is useful when editing Markdown files,
-whereas UI tests are much less likely to be helpful. While `x suggest` is a
-useful tool, it does not guarantee perfect coverage (just as PR CI isn't a
-substitute for bors). See the [dedicated chapter](../tests/suggest-tests.md) for
-more information and contribution instructions.
-
-Please note that `x suggest` is in a beta state currently and the tests that it
-will suggest are limited.
-
 ## Configuring `rustup` to use nightly
 
 Some parts of the bootstrap process uses pinned, nightly versions of tools like
diff --git a/src/doc/rustc-dev-guide/src/effects.md b/src/doc/rustc-dev-guide/src/effects.md
index c7aa2714668..87b0103a7bc 100644
--- a/src/doc/rustc-dev-guide/src/effects.md
+++ b/src/doc/rustc-dev-guide/src/effects.md
@@ -67,10 +67,8 @@ in [`wfcheck::check_impl`].
 Here's an example:
 
 ```rust
-#[const_trait]
-trait Bar {}
-#[const_trait]
-trait Foo: ~const Bar {}
+const trait Bar {}
+const trait Foo: ~const Bar {}
 // `const_conditions` contains `HostEffect(Self: Bar, maybe)`
 
 impl const Bar for () {}
@@ -85,8 +83,7 @@ predicates of the trait method, and we attempt to prove the predicates of the
 impl method. We do the same for `const_conditions`:
 
 ```rust
-#[const_trait]
-trait Foo {
+const trait Foo {
     fn hi<T: ~const Default>();
 }
 
diff --git a/src/doc/rustc-dev-guide/src/external-repos.md b/src/doc/rustc-dev-guide/src/external-repos.md
index f3170c9222d..ecc65b26ab7 100644
--- a/src/doc/rustc-dev-guide/src/external-repos.md
+++ b/src/doc/rustc-dev-guide/src/external-repos.md
@@ -9,7 +9,7 @@ There are three main ways we use dependencies:
 As a general rule:
 - Use crates.io for libraries that could be useful for others in the ecosystem
 - Use subtrees for tools that depend on compiler internals and need to be updated if there are breaking
-changes
+  changes
 - Use submodules for tools that are independent of the compiler
 
 ## External Dependencies (subtrees)
@@ -23,6 +23,8 @@ The following external projects are managed using some form of a `subtree`:
 * [rust-analyzer](https://github.com/rust-lang/rust-analyzer)
 * [rustc_codegen_cranelift](https://github.com/rust-lang/rustc_codegen_cranelift)
 * [rustc-dev-guide](https://github.com/rust-lang/rustc-dev-guide)
+* [compiler-builtins](https://github.com/rust-lang/compiler-builtins)
+* [stdarch](https://github.com/rust-lang/stdarch)
 
 In contrast to `submodule` dependencies
 (see below for those), the `subtree` dependencies are just regular files and directories which can
@@ -34,20 +36,61 @@ implement a new tool feature or test, that should happen in one collective rustc
 `subtree` dependencies are currently managed by two distinct approaches:
 
 * Using `git subtree`
-  * `clippy` ([sync guide](https://doc.rust-lang.org/nightly/clippy/development/infrastructure/sync.html#performing-the-sync-from-rust-langrust-to-clippy))
-  * `portable-simd` ([sync script](https://github.com/rust-lang/portable-simd/blob/master/subtree-sync.sh))
-  * `rustfmt`
-  * `rustc_codegen_cranelift` ([sync script](https://github.com/rust-lang/rustc_codegen_cranelift/blob/113af154d459e41b3dc2c5d7d878e3d3a8f33c69/scripts/rustup.sh#L7))
+    * `clippy` ([sync guide](https://doc.rust-lang.org/nightly/clippy/development/infrastructure/sync.html#performing-the-sync-from-rust-langrust-to-clippy))
+    * `portable-simd` ([sync script](https://github.com/rust-lang/portable-simd/blob/master/subtree-sync.sh))
+    * `rustfmt`
+    * `rustc_codegen_cranelift` ([sync script](https://github.com/rust-lang/rustc_codegen_cranelift/blob/113af154d459e41b3dc2c5d7d878e3d3a8f33c69/scripts/rustup.sh#L7))
 * Using the [josh] tool
-  * `miri` ([sync guide](https://github.com/rust-lang/miri/blob/master/CONTRIBUTING.md#advanced-topic-syncing-with-the-rustc-repo))
-  * `rust-analyzer` ([sync script](https://github.com/rust-lang/rust-analyzer/blob/2e13684be123eca7181aa48e043e185d8044a84a/xtask/src/release.rs#L147))
-  * `rustc-dev-guide` ([sync guide](https://github.com/rust-lang/rustc-dev-guide#synchronizing-josh-subtree-with-rustc))
+    * `miri` ([sync guide](https://github.com/rust-lang/miri/blob/master/CONTRIBUTING.md#advanced-topic-syncing-with-the-rustc-repo))
+    * `rust-analyzer` ([sync script](https://github.com/rust-lang/rust-analyzer/blob/2e13684be123eca7181aa48e043e185d8044a84a/xtask/src/release.rs#L147))
+    * `rustc-dev-guide` ([josh sync](#synchronizing-a-josh-subtree))
+    * `compiler-builtins` ([josh sync](#synchronizing-a-josh-subtree))
+    * `stdarch` ([josh sync](#synchronizing-a-josh-subtree))
 
-The [josh] tool is an alternative to git subtrees, which manages git history in a different way and scales better to larger repositories. Specific tooling is required to work with josh, you can check out the `miri` or `rust-analyzer` scripts linked above for inspiration. If you want to migrate a repository dependency from `git subtree` or `git submodule` to josh, you can check out [this guide](https://hackmd.io/7pOuxnkdQDaL1Y1FQr65xg).
+### Josh subtrees
 
-Below you can find a guide on how to perform push and pull synchronization with the main rustc repo using `git subtree`, although these instructions might differ repo from repo.
+The [josh] tool is an alternative to git subtrees, which manages git history in a different way and scales better to larger repositories. Specific tooling is required to work with josh; you can check out the `miri` or `rust-analyzer` scripts linked above for inspiration. We provide a helper [`rustc-josh-sync`][josh-sync] tool to help with the synchronization, described [below](#synchronizing-a-josh-subtree).
 
-### Synchronizing a subtree
+### Synchronizing a Josh subtree
+
+We use a dedicated tool called [`rustc-josh-sync`][josh-sync] for performing Josh subtree updates.
+Currently, we are migrating Josh repositories to it. So far, it is used in:
+
+- compiler-builtins
+- rustc-dev-guide
+- stdarch
+
+To install the tool:
+```
+cargo install --locked --git https://github.com/rust-lang/josh-sync
+```
+
+Both pulls (synchronize changes from rust-lang/rust into the subtree) and pushes (synchronize
+changes from the subtree to rust-lang/rust) are performed from the subtree repository (so first
+switch to its repository checkout directory in your terminal).
+
+#### Performing pull
+1) Checkout a new branch that will be used to create a PR into the subtree
+2) Run the pull command
+    ```
+    rustc-josh-sync pull
+    ```
+3) Push the branch to your fork and create a PR into the subtree repository
+    - If you have `gh` CLI installed, `rustc-josh-sync` can create the PR for you.
+
+#### Performing push
+
+1) Run the push command to create a branch named `<branch-name>` in a `rustc` fork under the `<gh-username>` account
+    ```
+    rustc-josh-sync push <branch-name> <gh-username>
+    ```
+2) Create a PR from `<branch-name>` into `rust-lang/rust`
+
+### Creating a new Josh subtree dependency
+
+If you want to migrate a repository dependency from `git subtree` or `git submodule` to josh, you can check out [this guide](https://hackmd.io/7pOuxnkdQDaL1Y1FQr65xg).
+
+### Synchronizing a git subtree
 
 Periodically the changes made to subtree based dependencies need to be synchronized between this
 repository and the upstream tool repositories.
@@ -129,3 +172,4 @@ the week leading up to the beta cut.
 [toolstate website]: https://rust-lang-nursery.github.io/rust-toolstate/
 [Toolstate chapter]: https://forge.rust-lang.org/infra/toolstate.html
 [josh]: https://josh-project.github.io/josh/intro.html
+[josh-sync]: https://github.com/rust-lang/josh-sync
diff --git a/src/doc/rustc-dev-guide/src/hir/ambig-unambig-ty-and-consts.md b/src/doc/rustc-dev-guide/src/hir/ambig-unambig-ty-and-consts.md
index 709027883ae..d4f504ad2a9 100644
--- a/src/doc/rustc-dev-guide/src/hir/ambig-unambig-ty-and-consts.md
+++ b/src/doc/rustc-dev-guide/src/hir/ambig-unambig-ty-and-consts.md
@@ -38,7 +38,7 @@ Note that places 3 and 4 would never actually be possible to encounter as we alw
 This has a few failure modes:
 - People may write visitors which check for `GenericArg::Infer` but forget to check for `hir::TyKind/ConstArgKind::Infer`, only handling infers in ambig positions by accident.
 - People may write visitors which check for `hir::TyKind/ConstArgKind::Infer` but forget to check for `GenericArg::Infer`, only handling infers in unambig positions by accident.
-- People may write visitors which check for `GenerArg::Type/Const(TyKind/ConstArgKind::Infer)` and `GenerigArg::Infer`, not realising that we never represent inferred types/consts in ambig positions as a `GenericArg::Type/Const`.
+- People may write visitors which check for `GenericArg::Type/Const(TyKind/ConstArgKind::Infer)` and `GenericArg::Infer`, not realising that we never represent inferred types/consts in ambig positions as a `GenericArg::Type/Const`.
 - People may write visitors which check for *only* `TyKind::Infer` and not `ConstArgKind::Infer` forgetting that there are also inferred const arguments (and vice versa).
 
 To make writing HIR visitors less error prone when caring about inferred types/consts we have a relatively complex system:
@@ -60,4 +60,4 @@ This has a number of benefits:
 [ambig_arg]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/hir/enum.AmbigArg.html
 [visit_ty]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/intravisit/trait.Visitor.html#method.visit_ty
 [visit_const_arg]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/intravisit/trait.Visitor.html#method.visit_const_arg
-[visit_infer]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/intravisit/trait.Visitor.html#method.visit_infer
\ No newline at end of file
+[visit_infer]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/intravisit/trait.Visitor.html#method.visit_infer
diff --git a/src/doc/rustc-dev-guide/src/llvm-coverage-instrumentation.md b/src/doc/rustc-dev-guide/src/llvm-coverage-instrumentation.md
index 28e0e7a908d..880363b94bf 100644
--- a/src/doc/rustc-dev-guide/src/llvm-coverage-instrumentation.md
+++ b/src/doc/rustc-dev-guide/src/llvm-coverage-instrumentation.md
@@ -117,7 +117,7 @@ human-readable coverage report.
 > directive, so they will be skipped if the profiler runtime has not been
 > [enabled in `bootstrap.toml`](#recommended-configtoml-settings).
 
-Finally, the [`tests/codegen/instrument-coverage/testprog.rs`] test compiles a simple Rust program
+Finally, the [`tests/codegen-llvm/instrument-coverage/testprog.rs`] test compiles a simple Rust program
 with `-C instrument-coverage` and compares the compiled program's LLVM IR to
 expected LLVM IR instructions and structured data for a coverage-enabled
 program, including various checks for Coverage Map-related metadata and the LLVM
@@ -136,4 +136,4 @@ and `mir-opt` tests can be refreshed by running:
 [`tests/coverage`]: https://github.com/rust-lang/rust/tree/master/tests/coverage
 [`src/tools/coverage-dump`]: https://github.com/rust-lang/rust/tree/master/src/tools/coverage-dump
 [`tests/coverage-run-rustdoc`]: https://github.com/rust-lang/rust/tree/master/tests/coverage-run-rustdoc
-[`tests/codegen/instrument-coverage/testprog.rs`]: https://github.com/rust-lang/rust/blob/master/tests/mir-opt/coverage/instrument_coverage.rs
+[`tests/codegen-llvm/instrument-coverage/testprog.rs`]: https://github.com/rust-lang/rust/blob/master/tests/mir-opt/coverage/instrument_coverage.rs
diff --git a/src/doc/rustc-dev-guide/src/offload/installation.md b/src/doc/rustc-dev-guide/src/offload/installation.md
index 2536af09a23..1e792de3c8c 100644
--- a/src/doc/rustc-dev-guide/src/offload/installation.md
+++ b/src/doc/rustc-dev-guide/src/offload/installation.md
@@ -6,14 +6,14 @@ In the future, `std::offload` should become available in nightly builds for user
 
 First you need to clone and configure the Rust repository:
 ```bash
-git clone --depth=1 git@github.com:rust-lang/rust.git
+git clone git@github.com:rust-lang/rust
 cd rust
 ./configure --enable-llvm-link-shared --release-channel=nightly --enable-llvm-assertions --enable-offload --enable-enzyme --enable-clang --enable-lld --enable-option-checking --enable-ninja --disable-docs
 ```
 
 Afterwards you can build rustc using:
 ```bash
-./x.py build --stage 1 library
+./x build --stage 1 library
 ```
 
 Afterwards rustc toolchain link will allow you to use it through cargo:
@@ -26,7 +26,7 @@ rustup toolchain install nightly # enables -Z unstable-options
 
 ## Build instruction for LLVM itself
 ```bash
-git clone --depth=1 git@github.com:llvm/llvm-project.git 
+git clone git@github.com:llvm/llvm-project
 cd llvm-project
 mkdir build
 cd build
@@ -40,7 +40,7 @@ This gives you a working LLVM build.
 ## Testing
 run
 ```
-./x.py test --stage 1 tests/codegen/gpu_offload
+./x test --stage 1 tests/codegen-llvm/gpu_offload
 ```
 
 ## Usage
diff --git a/src/doc/rustc-dev-guide/src/profile-guided-optimization.md b/src/doc/rustc-dev-guide/src/profile-guided-optimization.md
index d279786ac45..2fa81021045 100644
--- a/src/doc/rustc-dev-guide/src/profile-guided-optimization.md
+++ b/src/doc/rustc-dev-guide/src/profile-guided-optimization.md
@@ -132,7 +132,7 @@ There is also a [codegen test][codegen-test] that checks that some expected
 instrumentation artifacts show up in LLVM IR.
 
 [rmake-tests]: https://github.com/rust-lang/rust/tree/master/tests/run-make
-[codegen-test]: https://github.com/rust-lang/rust/blob/master/tests/codegen/pgo-instrumentation.rs
+[codegen-test]: https://github.com/rust-lang/rust/blob/master/tests/codegen-llvm/pgo-instrumentation.rs
 
 ## Additional information
 
diff --git a/src/doc/rustc-dev-guide/src/rustdoc-internals/rustdoc-test-suite.md b/src/doc/rustc-dev-guide/src/rustdoc-internals/rustdoc-test-suite.md
index b05318ce9e6..3ec5ebd799e 100644
--- a/src/doc/rustc-dev-guide/src/rustdoc-internals/rustdoc-test-suite.md
+++ b/src/doc/rustc-dev-guide/src/rustdoc-internals/rustdoc-test-suite.md
@@ -20,7 +20,7 @@ Internally, [`compiletest`] invokes the supplementary checker script [`htmldocck
 
 Directives to HtmlDocCk are assertions that place constraints on the generated HTML.
 They look similar to those given to `compiletest` in that they take the form of `//@` comments
-but ultimately, they are completey distinct and processed by different programs.
+but ultimately, they are completely distinct and processed by different programs.
 
 [XPath] is used to query parts of the HTML document tree.
 
@@ -55,6 +55,9 @@ Similar to shell commands,
 directives can extend across multiple lines if their last char is `\`.
 In this case, the start of the next line should be `//`, with no `@`.
 
+Similar to compiletest directives, besides a space you can also use a colon `:` to separate
+the directive name and the arguments, however a space is preferred for HtmlDocCk directives.
+
 Use the special string `{{channel}}` in XPaths, `PATTERN` arguments and [snapshot files](#snapshot)
 if you'd like to refer to the URL `https://doc.rust-lang.org/CHANNEL` where `CHANNEL` refers to the
 current release channel (e.g, `stable` or `nightly`).
diff --git a/src/doc/rustc-dev-guide/src/sanitizers.md b/src/doc/rustc-dev-guide/src/sanitizers.md
index 664b4feac4f..29d9056c15d 100644
--- a/src/doc/rustc-dev-guide/src/sanitizers.md
+++ b/src/doc/rustc-dev-guide/src/sanitizers.md
@@ -76,7 +76,7 @@ implementation:
 ## Testing sanitizers
 
 Sanitizers are validated by code generation tests in
-[`tests/codegen/sanitize*.rs`][test-cg] and end-to-end functional tests in
+[`tests/codegen-llvm/sanitize*.rs`][test-cg] and end-to-end functional tests in
 [`tests/ui/sanitizer/`][test-ui] directory.
 
 Testing sanitizer functionality requires the sanitizer runtimes (built when
@@ -85,7 +85,7 @@ sanitizer. When sanitizer is unsupported on given target, sanitizers tests will
 be ignored. This behaviour is controlled by compiletest `needs-sanitizer-*`
 directives.
 
-[test-cg]: https://github.com/rust-lang/rust/tree/master/tests/codegen
+[test-cg]: https://github.com/rust-lang/rust/tree/master/tests/codegen-llvm
 [test-ui]: https://github.com/rust-lang/rust/tree/master/tests/ui/sanitizer
 
 ## Enabling sanitizer on a new target
diff --git a/src/doc/rustc-dev-guide/src/serialization.md b/src/doc/rustc-dev-guide/src/serialization.md
index 47667061eda..8eb37bbe20b 100644
--- a/src/doc/rustc-dev-guide/src/serialization.md
+++ b/src/doc/rustc-dev-guide/src/serialization.md
@@ -75,7 +75,7 @@ impl<D: Decoder> Decodable<D> for MyStruct {
 
 rustc has a lot of [arena allocated types].
 Deserializing these types isn't possible without access to the arena that they need to be allocated on.
-The [`TyDecoder`] and [`TyEncoder`] traits are supertraits of [`Decoder`] and [`Encoder`] that allow access to a [`TyCtxt`].
+The [`TyDecoder`] and [`TyEncoder`] traits are subtraits of [`Decoder`] and [`Encoder`] that allow access to a [`TyCtxt`].
 
 Types which contain `arena` allocated types can then bound the type parameter of their
 [`Encodable`] and [`Decodable`] implementations with these traits.
diff --git a/src/doc/rustc-dev-guide/src/solve/invariants.md b/src/doc/rustc-dev-guide/src/solve/invariants.md
index fd12b195757..8ec15f339e5 100644
--- a/src/doc/rustc-dev-guide/src/solve/invariants.md
+++ b/src/doc/rustc-dev-guide/src/solve/invariants.md
@@ -4,17 +4,15 @@ FIXME: This file talks about invariants of the type system as a whole, not only
 
 There are a lot of invariants - things the type system guarantees to be true at all times -
 which are desirable or expected from other languages and type systems. Unfortunately, quite
-a few of them do not hold in Rust right now. This is either a fundamental to its design or
-caused by bugs and something that may change in the future.
+a few of them do not hold in Rust right now. This is either fundamental to its design or
+caused by bugs, and something that may change in the future.
 
-It is important to know about the things you can assume while working on - and with - the
+It is important to know about the things you can assume while working on, and with, the
 type system, so here's an incomplete and unofficial list of invariants of
 the core type system:
 
-- ✅: this invariant mostly holds, with some weird exceptions, you can rely on it outside
-of these cases
-- ❌: this invariant does not hold, either due to bugs or by design, you must not rely on
-it for soundness or have to be incredibly careful when doing so
+- ✅: this invariant mostly holds, with some weird exceptions or current bugs
+- ❌: this invariant does not hold, and is unlikely to do so in the future; do not rely on it for soundness or have to be incredibly careful when doing so
 
 ### `wf(X)` implies `wf(normalize(X))` ✅
 
@@ -23,20 +21,23 @@ well-formed after normalizing said aliases. We rely on this as
 otherwise we would have to re-check for well-formedness for these
 types.
 
+This currently does not hold due to a type system unsoundness: [#84533](https://github.com/rust-lang/rust/issues/84533).
+
 ### Structural equality modulo regions implies semantic equality ✅
 
 If you have a some type and equate it to itself after replacing any regions with unique
 inference variables in both the lhs and rhs, the now potentially structurally different
 types should still be equal to each other.
 
-Needed to prevent goals from succeeding in HIR typeck and then failing in MIR borrowck.
-If this invariant is broken MIR typeck ends up failing with an ICE.
+This is needed to prevent goals from succeeding in HIR typeck and then failing in MIR borrowck.
+If this invariant is broken, MIR typeck ends up failing with an ICE.
 
 ### Applying inference results from a goal does not change its result ❌
 
 TODO: this invariant is formulated in a weird way and needs to be elaborated.
 Pretty much: I would like this check to only fail if there's a solver bug:
-https://github.com/rust-lang/rust/blob/2ffeb4636b4ae376f716dc4378a7efb37632dc2d/compiler/rustc_trait_selection/src/solve/eval_ctxt.rs#L391-L407
+<https://github.com/rust-lang/rust/blob/2ffeb4636b4ae376f716dc4378a7efb37632dc2d/compiler/rustc_trait_selection/src/solve/eval_ctxt.rs#L391-L407>.
+We should readd this check and see where it breaks :3
 
 If we prove some goal/equate types/whatever, apply the resulting inference constraints,
 and then redo the original action, the result should be the same.
@@ -73,82 +74,99 @@ Many of the currently known unsound issues end up relying on this invariant bein
 It is however very difficult to imagine a sound type system without this invariant, so
 the issue is that the invariant is broken, not that we incorrectly rely on it.
 
-### Generic goals and their instantiations have the same result ✅
+### The type system is complete ❌
+
+The type system is not complete.
+It often adds unnecessary inference constraints, and errors even though the goal could hold.
+
+- method selection
+- opaque type inference
+- handling type outlives constraints
+- preferring `ParamEnv` candidates over `Impl` candidates during candidate selection
+in the trait solver
+
+### Goals keep their result from HIR typeck afterwards ✅
+
+Having a goal which succeeds during HIR typeck but fails when being reevaluated during MIR borrowck causes ICE, e.g. [#140211](https://github.com/rust-lang/rust/issues/140211).
 
-Pretty much: If we successfully typecheck a generic function concrete instantiations
-of that function should also typeck. We should not get errors post-monomorphization.
-We can however get overflow errors at that point.
+Having a goal which succeeds during HIR typeck but fails after being instantiated is unsound, e.g. [#140212](https://github.com/rust-lang/rust/issues/140212).
 
-TODO: example for overflow error post-monomorphization
+It is interesting that we allow some incompleteness in the trait solver while still maintaining this limitation. It would be nice if there was a clear way to separate the "allowed incompleteness" from behavior which would break this invariant.
+
+#### Normalization must not change results
 
 This invariant is relied on to allow the normalization of generic aliases. Breaking
-it can easily result in unsoundness, e.g. [#57893](https://github.com/rust-lang/rust/issues/57893)
+it can easily result in unsoundness, e.g. [#57893](https://github.com/rust-lang/rust/issues/57893).
+
+#### Goals may still overflow after instantiation
+
+This happens they start to hit the recursion limit.
+We also have diverging aliases which are scuffed.
+It's unclear how these should be handled :3
 
 ### Trait goals in empty environments are proven by a unique impl ✅
 
 If a trait goal holds with an empty environment, there should be a unique `impl`,
 either user-defined or builtin, which is used to prove that goal. This is
-necessary to select a unique method.
+necessary to select unique methods and associated items.
 
-We do however break this invariant in few cases, some of which are due to bugs,
-some by design:
+We do however break this invariant in a few cases, some of which are due to bugs, some by design:
 - *marker traits* are allowed to overlap as they do not have associated items
 - *specialization* allows specializing impls to overlap with their parent
 - the builtin trait object trait implementation can overlap with a user-defined impl:
-[#57893]
+[#57893](https://github.com/rust-lang/rust/issues/57893)
 
-### The type system is complete ❌
-
-The type system is not complete, it often adds unnecessary inference constraints, and errors
-even though the goal could hold.
-
-- method selection
-- opaque type inference
-- handling type outlives constraints
-- preferring `ParamEnv` candidates over `Impl` candidates during candidate selection
-in the trait solver
 
 #### The type system is complete during the implicit negative overlap check in coherence ✅
 
-For more on overlap checking: [coherence]
+For more on overlap checking, see [Coherence chapter].
 
-During the implicit negative overlap check in coherence we must never return *error* for
-goals which can be proven. This would allow for overlapping impls with potentially different
-associated items, breaking a bunch of other invariants.
+During the implicit negative overlap check in coherence,
+we must never return *error* for goals which can be proven.
+This would allow for overlapping impls with potentially different associated items,
+breaking a bunch of other invariants.
 
 This invariant is currently broken in many different ways while actually something we rely on.
 We have to be careful as it is quite easy to break:
 - generalization of aliases
 - generalization during subtyping binders (luckily not exploitable in coherence)
 
-### Trait solving must be (free) lifetime agnostic ✅
+### Trait solving must not depend on lifetimes being different ✅
+
+If a goal holds with lifetimes being different, it must also hold with these lifetimes being the same. We otherwise get post-monomorphization errors during codegen or unsoundness due to invalid vtables.
 
-Trait solving during codegen should have the same result as during typeck. As we erase
-all free regions during codegen we must not rely on them during typeck. A noteworthy example
-is special behavior for `'static`.
+We could also just get inconsistent behavior when first proving a goal with different lifetimes which are later constrained to be equal.
+
+### Trait solving in bodies must not depend on lifetimes being equal ✅
 
 We also have to be careful with relying on equality of regions in the trait solver.
 This is fine for codegen, as we treat all erased regions as equal. We can however
 lose equality information from HIR to MIR typeck.
 
-The new solver "uniquifies regions" during canonicalization, canonicalizing `u32: Trait<'x, 'x>`
-as `exists<'0, '1> u32: Trait<'0, '1>`, to make it harder to rely on this property.
+This currently does not hold with the new solver: [trait-system-refactor-initiative#27](https://github.com/rust-lang/trait-system-refactor-initiative/issues/27).
 
 ### Removing ambiguity makes strictly more things compile ❌
 
 Ideally we *should* not rely on ambiguity for things to compile.
 Not doing that will cause future improvements to be breaking changes.
 
-Due to *incompleteness* this is not the case and improving inference can result in inference
-changes, breaking existing projects.
+Due to *incompleteness* this is not the case,
+and improving inference can result in inference changes, breaking existing projects.
 
 ### Semantic equality implies structural equality ✅
 
 Two types being equal in the type system must mean that they have the
 same `TypeId` after instantiating their generic parameters with concrete
-arguments. This currently does not hold: [#97156].
+arguments. We can otherwise use their different `TypeId`s to impact trait selection.
+
+We lookup types using structural equality during codegen, but this shouldn't necessarily be unsound
+- may result in redundant method codegen or backend type check errors?
+- we also rely on it in CTFE assertions
+
+### Semantically different types have different `TypeId`s ✅
+
+Semantically different `'static` types need different `TypeId`s to avoid transmutes,
+for example `for<'a> fn(&'a str)` vs `fn(&'static str)` must have a different `TypeId`.
+
 
-[#57893]: https://github.com/rust-lang/rust/issues/57893
-[#97156]: https://github.com/rust-lang/rust/issues/97156
-[#114936]: https://github.com/rust-lang/rust/issues/114936
-[coherence]:  ../coherence.md
+[coherence chapter]: ../coherence.md
diff --git a/src/doc/rustc-dev-guide/src/tests/compiletest.md b/src/doc/rustc-dev-guide/src/tests/compiletest.md
index ded30234e70..a108dfdef9b 100644
--- a/src/doc/rustc-dev-guide/src/tests/compiletest.md
+++ b/src/doc/rustc-dev-guide/src/tests/compiletest.md
@@ -29,7 +29,7 @@ on if or how to run the test, what behavior to expect, and more. See
 [directives](directives.md) and the test suite documentation below for more details
 on these annotations.
 
-See the [Adding new tests](adding.md) and [Best practies](best-practices.md)
+See the [Adding new tests](adding.md) and [Best practices](best-practices.md)
 chapters for a tutorial on creating a new test and advice on writing a good
 test, and the [Running tests](running.md) chapter on how to run the test suite.
 
@@ -68,7 +68,7 @@ The following test suites are available, with links for more information:
 | [`pretty`](#pretty-printer-tests)         | Check pretty printing                                                                                               |
 | [`incremental`](#incremental-tests)       | Check incremental compilation behavior                                                                              |
 | [`debuginfo`](#debuginfo-tests)           | Check debuginfo generation running debuggers                                                                        |
-| [`codegen`](#codegen-tests)               | Check code generation                                                                                               |
+| [`codegen-*`](#codegen-tests)             | Check code generation                                                                                               |
 | [`codegen-units`](#codegen-units-tests)   | Check codegen unit partitioning                                                                                     |
 | [`assembly`](#assembly-tests)             | Check assembly output                                                                                               |
 | [`mir-opt`](#mir-opt-tests)               | Check MIR generation and optimizations                                                                              |
@@ -290,7 +290,7 @@ For example, `./x test tests/debuginfo -- --debugger gdb` will only test GDB com
 
 ### Codegen tests
 
-The tests in [`tests/codegen`] test LLVM code generation. They compile the test
+The tests in [`tests/codegen-llvm`] test LLVM code generation. They compile the test
 with the `--emit=llvm-ir` flag to emit LLVM IR. They then run the LLVM
 [FileCheck] tool. The test is annotated with various `// CHECK` comments to
 check the generated code. See the [FileCheck] documentation for a tutorial and
@@ -301,13 +301,13 @@ See also the [assembly tests](#assembly-tests) for a similar set of tests.
 If you need to work with `#![no_std]` cross-compiling tests, consult the
 [`minicore` test auxiliary](./minicore.md) chapter.
 
-[`tests/codegen`]: https://github.com/rust-lang/rust/tree/master/tests/codegen
+[`tests/codegen-llvm`]: https://github.com/rust-lang/rust/tree/master/tests/codegen-llvm
 [FileCheck]: https://llvm.org/docs/CommandGuide/FileCheck.html
 
 
 ### Assembly tests
 
-The tests in [`tests/assembly`] test LLVM assembly output. They compile the test
+The tests in [`tests/assembly-llvm`] test LLVM assembly output. They compile the test
 with the `--emit=asm` flag to emit a `.s` file with the assembly output. They
 then run the LLVM [FileCheck] tool.
 
@@ -324,7 +324,7 @@ See also the [codegen tests](#codegen-tests) for a similar set of tests.
 If you need to work with `#![no_std]` cross-compiling tests, consult the
 [`minicore` test auxiliary](./minicore.md) chapter.
 
-[`tests/assembly`]: https://github.com/rust-lang/rust/tree/master/tests/assembly
+[`tests/assembly-llvm`]: https://github.com/rust-lang/rust/tree/master/tests/assembly-llvm
 
 
 ### Codegen-units tests
diff --git a/src/doc/rustc-dev-guide/src/tests/directives.md b/src/doc/rustc-dev-guide/src/tests/directives.md
index 839076b809d..5c3ae359ba0 100644
--- a/src/doc/rustc-dev-guide/src/tests/directives.md
+++ b/src/doc/rustc-dev-guide/src/tests/directives.md
@@ -59,7 +59,7 @@ not be exhaustive. Directives can generally be found by browsing the
 | `aux-crate`           | Like `aux-build` but makes available as extern prelude                                                | All except `run-make` | `<extern_prelude_name>=<path/to/aux/file.rs>` |
 | `aux-codegen-backend` | Similar to `aux-build` but pass the compiled dylib to `-Zcodegen-backend` when building the main file | `ui-fulldeps`         | Path to codegen backend file                  |
 | `proc-macro`          | Similar to `aux-build`, but for aux forces host and don't use `-Cprefer-dynamic`[^pm].                | All except `run-make` | Path to auxiliary proc-macro `.rs` file       |
-| `build-aux-docs`      | Build docs for auxiliaries as well                                                                    | All except `run-make` | N/A                                           |
+| `build-aux-docs`      | Build docs for auxiliaries as well.  Note that this only works with `aux-build`, not `aux-crate`.     | All except `run-make` | N/A                                           |
 
 [^pm]: please see the Auxiliary proc-macro section in the
     [compiletest](./compiletest.md) chapter for specifics.
@@ -75,8 +75,10 @@ expectations](ui.md#controlling-passfail-expectations).
 | `check-fail`                | Building (no codegen) should fail           | `ui`, `crashes`                           | N/A             |
 | `build-pass`                | Building should pass                        | `ui`, `crashes`, `codegen`, `incremental` | N/A             |
 | `build-fail`                | Building should fail                        | `ui`, `crashes`                           | N/A             |
-| `run-pass`                  | Running the test binary should pass         | `ui`, `crashes`, `incremental`            | N/A             |
-| `run-fail`                  | Running the test binary should fail         | `ui`, `crashes`                           | N/A             |
+| `run-pass`                  | Program must exit with code `0`             | `ui`, `crashes`, `incremental`            | N/A             |
+| `run-fail`                  | Program must exit with code `1..=127`       | `ui`, `crashes`                           | N/A             |
+| `run-crash`                 | Program must crash                          | `ui`                                      | N/A             |
+| `run-fail-or-crash`         | Program must `run-fail` or `run-crash`      | `ui`                                      | N/A             |
 | `ignore-pass`               | Ignore `--pass` flag                        | `ui`, `crashes`, `codegen`, `incremental` | N/A             |
 | `dont-check-failure-status` | Don't check exact failure status (i.e. `1`) | `ui`, `incremental`                       | N/A             |
 | `failure-status`            | Check                                       | `ui`, `crashes`                           | Any `u16`       |
@@ -203,6 +205,8 @@ settings:
   on `wasm32-unknown-unknown` target because the target does not support the
   `proc-macro` crate type.
 - `needs-target-std` — ignores if target platform does not have std support.
+- `ignore-backends` — ignores the listed backends, separated by whitespace characters.
+- `needs-backends` — only runs the test if current codegen backend is listed.
 
 The following directives will check LLVM support:
 
diff --git a/src/doc/rustc-dev-guide/src/tests/intro.md b/src/doc/rustc-dev-guide/src/tests/intro.md
index c55d60f4a5c..79b96c450a8 100644
--- a/src/doc/rustc-dev-guide/src/tests/intro.md
+++ b/src/doc/rustc-dev-guide/src/tests/intro.md
@@ -111,12 +111,14 @@ and it can be invoked so:
 
 This requires building all of the documentation, which might take a while.
 
-### Dist check
+### `distcheck`
 
 `distcheck` verifies that the source distribution tarball created by the build
 system will unpack, build, and run all tests.
 
-> Example: `./x test distcheck`
+```console
+./x test distcheck
+```
 
 ### Tool tests
 
diff --git a/src/doc/rustc-dev-guide/src/tests/misc.md b/src/doc/rustc-dev-guide/src/tests/misc.md
index c0288b3dd10..39f88174879 100644
--- a/src/doc/rustc-dev-guide/src/tests/misc.md
+++ b/src/doc/rustc-dev-guide/src/tests/misc.md
@@ -9,7 +9,7 @@ for testing:
 
 - `RUSTC_BOOTSTRAP=1` will "cheat" and bypass usual stability checking, allowing
   you to use unstable features and cli flags on a stable `rustc`.
-- `RUSTC_BOOTSTRAP=-1` will force a given `rustc` to pretend that is a stable
+- `RUSTC_BOOTSTRAP=-1` will force a given `rustc` to pretend it is a stable
   compiler, even if it's actually a nightly `rustc`. This is useful because some
   behaviors of the compiler (e.g. diagnostics) can differ depending on whether
   the compiler is nightly or not.
diff --git a/src/doc/rustc-dev-guide/src/tests/suggest-tests.md b/src/doc/rustc-dev-guide/src/tests/suggest-tests.md
deleted file mode 100644
index 663e8a5af3b..00000000000
--- a/src/doc/rustc-dev-guide/src/tests/suggest-tests.md
+++ /dev/null
@@ -1,59 +0,0 @@
-# Suggest tests tool
-
-This chapter is about the internals of and contribution instructions for the
-`suggest-tests` tool. For a high-level overview of the tool, see [this
-section](../building/suggested.md#x-suggest). This tool is currently in a beta
-state and is tracked by [this](https://github.com/rust-lang/rust/issues/109933)
-issue on Github. Currently the number of tests it will suggest are very limited
-in scope, we are looking to expand this (contributions welcome!).
-
-## Internals
-
-The tool is defined in a separate crate
-([`src/tools/suggest-tests`](https://github.com/rust-lang/rust/blob/master/src/tools/suggest-tests))
-which outputs suggestions which are parsed by a shim in bootstrap
-([`src/bootstrap/src/core/build_steps/suggest.rs`](https://github.com/rust-lang/rust/blob/master/src/bootstrap/src/core/build_steps/suggest.rs)).
-The only notable thing the bootstrap shim does is (when invoked with the `--run`
-flag) use bootstrap's internal mechanisms to create a new `Builder` and uses it
-to invoke the suggested commands. The `suggest-tests` crate is where the fun
-happens, two kinds of suggestions are defined: "static" and "dynamic"
-suggestions.
-
-### Static suggestions
-
-Defined
-[here](https://github.com/rust-lang/rust/blob/master/src/tools/suggest-tests/src/static_suggestions.rs).
-Static suggestions are simple: they are just
-[globs](https://crates.io/crates/glob) which map to a `x` command. In
-`suggest-tests`, this is implemented with a simple `macro_rules` macro.
-
-### Dynamic suggestions
-
-Defined
-[here](https://github.com/rust-lang/rust/blob/master/src/tools/suggest-tests/src/dynamic_suggestions.rs).
-These are more complicated than static suggestions and are implemented as
-functions with the following signature: `fn(&Path) -> Vec<Suggestion>`. In other
-words, each suggestion takes a path to a modified file and (after running
-arbitrary Rust code) can return any number of suggestions, or none. Dynamic
-suggestions are useful for situations where fine-grained control over
-suggestions is needed. For example, modifications to the `compiler/xyz/` path
-should trigger the `x test compiler/xyz` suggestion. In the future, dynamic
-suggestions might even read file contents to determine if (what) tests should
-run.
-
-## Adding a suggestion
-
-The following steps should serve as a rough guide to add suggestions to
-`suggest-tests` (very welcome!):
-
-1. Determine the rules for your suggestion. Is it simple and operates only on a
-   single path or does it match globs? Does it need fine-grained control over
-   the resulting command or does "one size fit all"?
-2. Based on the previous step, decide if your suggestion should be implemented
-   as either static or dynamic.
-3. Implement the suggestion. If it is dynamic then a test is highly recommended,
-   to verify that your logic is correct and to give an example of the
-   suggestion. See the
-   [tests.rs](https://github.com/rust-lang/rust/blob/master/src/tools/suggest-tests/src/tests.rs)
-   file.
-4. Open a PR implementing your suggestion. **(TODO: add example PR)**
diff --git a/src/doc/rustc-dev-guide/src/tests/ui.md b/src/doc/rustc-dev-guide/src/tests/ui.md
index 4fce5838b6e..9bfc60e08a6 100644
--- a/src/doc/rustc-dev-guide/src/tests/ui.md
+++ b/src/doc/rustc-dev-guide/src/tests/ui.md
@@ -448,7 +448,7 @@ even run the resulting program. Just add one of the following
   - `//@ build-pass` — compilation and linking should succeed but do
     not run the resulting binary.
   - `//@ run-pass` — compilation should succeed and running the resulting
-    binary should also succeed.
+    binary should make it exit with code 0 which indicates success.
 - Fail directives:
   - `//@ check-fail` — compilation should fail (the codegen phase is skipped).
     This is the default for UI tests.
@@ -457,10 +457,20 @@ even run the resulting program. Just add one of the following
     - First time is to ensure that the compile succeeds without the codegen phase
     - Second time is to ensure that the full compile fails
   - `//@ run-fail` — compilation should succeed, but running the resulting
-    binary should fail.
-
-For `run-pass` and `run-fail` tests, by default the output of the program itself
-is not checked.
+    binary should make it exit with a code in the range `1..=127` which
+    indicates regular failure. On targets without unwind support, crashes
+    are also accepted.
+  - `//@ run-crash` — compilation should succeed, but running the resulting
+    binary should fail with a crash. Crashing is defined as "not exiting with
+    a code in the range `0..=127`". Example on Linux: Termination by `SIGABRT`
+    or `SIGSEGV`. Example on Windows: Exiting with the code for
+    `STATUS_ILLEGAL_INSTRUCTION` (`0xC000001D`).
+  - `//@ run-fail-or-crash` — compilation should succeed, but running the
+    resulting binary should either `run-fail` or `run-crash`. Useful if a test
+    crashes on some targets but just fails on others.
+
+For `run-pass`. `run-fail`, `run-crash` and `run-fail-or-crash` tests, by
+default the output of the program itself is not checked.
 
 If you want to check the output of running the program, include the
 `check-run-results` directive. This will check for a `.run.stderr` and
diff --git a/src/doc/rustc-dev-guide/src/ty_module/instantiating_binders.md b/src/doc/rustc-dev-guide/src/ty_module/instantiating_binders.md
index e3f091ca45f..0d1108c72e0 100644
--- a/src/doc/rustc-dev-guide/src/ty_module/instantiating_binders.md
+++ b/src/doc/rustc-dev-guide/src/ty_module/instantiating_binders.md
@@ -77,7 +77,7 @@ This end result is incorrect as we had two separate binders introducing their ow
 
 While in theory we could make this work it would be quite involved and more complex than the current setup, we would have to:
 - "rewrite" bound variables to have a higher `DebruijnIndex` whenever instantiating a `Binder`/`EarlyBinder` with a `Bound` ty/const/region 
-- When inferring an inference variable to a bound var, if that bound var is from a binder enterred after creating the infer var, we would have to lower the `DebruijnIndex` of the var.
+- When inferring an inference variable to a bound var, if that bound var is from a binder entered after creating the infer var, we would have to lower the `DebruijnIndex` of the var.
 - Separately track what binder an inference variable was created inside of, also what the innermost binder it can name parameters from (currently we only have to track the latter)
 - When resolving inference variables rewrite any bound variables according to the current binder depth of the infcx
 - Maybe more (while writing this list items kept getting added so it seems naive to think this is exhaustive)
diff --git a/src/doc/rustc/src/SUMMARY.md b/src/doc/rustc/src/SUMMARY.md
index 9fe4c218121..7c688e32bc0 100644
--- a/src/doc/rustc/src/SUMMARY.md
+++ b/src/doc/rustc/src/SUMMARY.md
@@ -46,6 +46,7 @@
     - [\*-apple-watchos](platform-support/apple-watchos.md)
     - [\*-apple-visionos](platform-support/apple-visionos.md)
     - [aarch64-nintendo-switch-freestanding](platform-support/aarch64-nintendo-switch-freestanding.md)
+    - [aarch64-unknown-linux-musl](platform-support/aarch64-unknown-linux-musl.md)
     - [amdgcn-amd-amdhsa](platform-support/amdgcn-amd-amdhsa.md)
     - [armeb-unknown-linux-gnueabi](platform-support/armeb-unknown-linux-gnueabi.md)
     - [arm-none-eabi](platform-support/arm-none-eabi.md)
@@ -83,6 +84,7 @@
     - [m68k-unknown-linux-gnu](platform-support/m68k-unknown-linux-gnu.md)
     - [m68k-unknown-none-elf](platform-support/m68k-unknown-none-elf.md)
     - [mips64-openwrt-linux-musl](platform-support/mips64-openwrt-linux-musl.md)
+    - [mips64-unknown-linux-muslabi64](platform-support/mips64-unknown-linux-muslabi64.md)
     - [mipsel-sony-psx](platform-support/mipsel-sony-psx.md)
     - [mipsel-unknown-linux-gnu](platform-support/mipsel-unknown-linux-gnu.md)
     - [mips\*-mti-none-elf](platform-support/mips-mti-none-elf.md)
diff --git a/src/doc/rustc/src/codegen-options/index.md b/src/doc/rustc/src/codegen-options/index.md
index bb109adf76f..07eafdf4c4c 100644
--- a/src/doc/rustc/src/codegen-options/index.md
+++ b/src/doc/rustc/src/codegen-options/index.md
@@ -235,15 +235,33 @@ coverage measurement. Its use is not recommended.
 
 ## link-self-contained
 
-On `windows-gnu`, `linux-musl`, and `wasi` targets, this flag controls whether the
-linker will use libraries and objects shipped with Rust instead of those in the system.
-It takes one of the following values:
+This flag controls whether the linker will use libraries and objects shipped with Rust instead of
+those in the system.  It also controls which binary is used for the linker itself. This allows
+overriding cases when detection fails or the user wants to use shipped libraries.
+
+You can enable or disable the usage of any self-contained components using one of the following values:
 
 * no value: rustc will use heuristic to disable self-contained mode if system has necessary tools.
 * `y`, `yes`, `on`, `true`: use only libraries/objects shipped with Rust.
 * `n`, `no`, `off` or `false`: rely on the user or the linker to provide non-Rust libraries/objects.
 
-This allows overriding cases when detection fails or user wants to use shipped libraries.
+It is also possible to enable or disable specific self-contained components in a more granular way.
+You can pass a comma-separated list of self-contained components, individually enabled
+(`+component`) or disabled (`-component`).
+
+Currently, only the `linker` granular option is stabilized, and only on the `x86_64-unknown-linux-gnu` target:
+- `linker`: toggle the usage of self-contained linker binaries (linker, dlltool, and their necessary libraries)
+
+Note that only the `-linker` opt-out is stable on the `x86_64-unknown-linux-gnu` target: `+linker` is
+already the default on this target.
+
+#### Implementation notes
+
+On the `x86_64-unknown-linux-gnu` target, when using the default linker flavor (using `cc` as the
+linker driver) and linker features (to try using `lld`), `rustc` will try to use the self-contained
+linker by passing a `-B /path/to/sysroot/` link argument to the driver to find `rust-lld` in the
+sysroot. For backwards-compatibility, and to limit name and `PATH` collisions, this is done using a
+shim executable (the `lld-wrapper` tool) that forwards execution to the `rust-lld` executable itself.
 
 ## linker
 
@@ -256,6 +274,39 @@ Note that on Unix-like targets (for example, `*-unknown-linux-gnu` or `*-unknown
 the C compiler (for example `cc` or `clang`) is used as the "linker" here, serving as a linker driver.
 It will invoke the actual linker with all the necessary flags to be able to link against the system libraries like libc.
 
+## linker-features
+
+The `-Clinker-features` flag allows enabling or disabling specific features used during linking.
+
+These feature flags are a flexible extension mechanism that is complementary to linker flavors,
+designed to avoid the combinatorial explosion of having to create a new set of flavors for each
+linker feature we'd want to use.
+
+The flag accepts a comma-separated list of features, individually enabled (`+feature`) or disabled
+(`-feature`).
+
+Currently only one is stable, and only on the `x86_64-unknown-linux-gnu` target:
+- `lld`: to toggle trying to use the lld linker, either the system-installed binary, or the self-contained
+  `rust-lld` linker (via the [`-Clink-self-contained=+linker`](#link-self-contained) flag).
+
+For example, use:
+- `-Clinker-features=+lld` to opt into using the `lld` linker, when possible (see the Implementation notes below)
+- `-Clinker-features=-lld` to opt out instead, for targets where it is configured as the default linker
+
+Note that only the `-lld` opt-out is stable on the `x86_64-unknown-linux-gnu` target: `+lld` is
+already the default on this target.
+
+#### Implementation notes
+
+On the `x86_64-unknown-linux-gnu` target, when using the default linker flavor (using `cc` as the
+linker driver), `rustc` will try to use lld by passing a `-fuse-ld=lld` link argument to the driver.
+`rustc` will also try to detect if that _causes_ an error during linking (for example, if GCC is too
+old to understand the flag, and returns an error) and will then retry linking without this argument,
+as a fallback.
+
+If the user _also_ passes a `-Clink-arg=-fuse-ld=$value`, both will be given to the linker
+driver but the user's will be passed last, and would generally have priority over `rustc`'s.
+
 ## linker-flavor
 
 This flag controls the linker flavor used by `rustc`. If a linker is given with
diff --git a/src/doc/rustc/src/exploit-mitigations.md b/src/doc/rustc/src/exploit-mitigations.md
index f8bafe03214..c80d7d8743c 100644
--- a/src/doc/rustc/src/exploit-mitigations.md
+++ b/src/doc/rustc/src/exploit-mitigations.md
@@ -54,17 +54,17 @@ Summary of exploit mitigations supported by the Rust compiler when building
 programs for the Linux operating system on the AMD64 architecture and
 equivalent.
 
-| Exploit mitigation | Supported and enabled by default | Since |
-| - | - | - |
-| Position-independent executable | Yes | 0.12.0 (2014-10-09) |
-| Integer overflow checks | Yes (enabled when debug assertions are enabled, and disabled when debug assertions are disabled) | 1.1.0 (2015-06-25) |
-| Non-executable memory regions | Yes | 1.8.0 (2016-04-14) |
-| Stack clashing protection | Yes | 1.20.0 (2017-08-31) |
-| Read-only relocations and immediate binding | Yes | 1.21.0 (2017-10-12) |
-| Heap corruption protection | Yes | 1.32.0 (2019-01-17) (via operating system default or specified allocator) |
-| Stack smashing protection | Yes | Nightly |
-| Forward-edge control flow protection | Yes | Nightly |
-| Backward-edge control flow protection (e.g., shadow and safe stack) | Yes | Nightly |
+| Exploit mitigation | Supported | Enabled by default | Since |
+| - | - | - | - |
+| Position-independent executable | Yes | Yes | 0.12.0 (2014-10-09) |
+| Integer overflow checks | Yes | (enabled when debug assertions are enabled, and disabled when debug assertions are disabled) | 1.1.0 (2015-06-25) |
+| Non-executable memory regions | Yes | Yes | 1.8.0 (2016-04-14) |
+| Stack clashing protection | Yes | Yes | 1.20.0 (2017-08-31) |
+| Read-only relocations and immediate binding | Yes | Yes | 1.21.0 (2017-10-12) |
+| Heap corruption protection | Yes | Yes | 1.32.0 (2019-01-17) (via operating system default or specified allocator) |
+| Stack smashing protection | Yes | No, `-Z stack-protector` | Nightly |
+| Forward-edge control flow protection | Yes | No, `-Z sanitizer=cfi` | Nightly |
+| Backward-edge control flow protection (e.g., shadow and safe stack) | Yes | No, `-Z sanitizer=shadow-call-stack,safestack` | Nightly |
 
 [^all-targets]: See <https://github.com/rust-lang/rust/tree/master/compiler/rustc_target/src/spec>
     for a list of targets and their default options.
diff --git a/src/doc/rustc/src/platform-support.md b/src/doc/rustc/src/platform-support.md
index 285b1e519b7..65b70630153 100644
--- a/src/doc/rustc/src/platform-support.md
+++ b/src/doc/rustc/src/platform-support.md
@@ -90,7 +90,7 @@ target | notes
 -------|-------
 [`aarch64-pc-windows-gnullvm`](platform-support/windows-gnullvm.md) | ARM64 MinGW (Windows 10+), LLVM ABI
 [`aarch64-pc-windows-msvc`](platform-support/windows-msvc.md) | ARM64 Windows MSVC
-`aarch64-unknown-linux-musl` | ARM64 Linux with musl 1.2.3
+[`aarch64-unknown-linux-musl`](platform-support/aarch64-unknown-linux-musl.md) | ARM64 Linux with musl 1.2.3
 [`aarch64-unknown-linux-ohos`](platform-support/openharmony.md) | ARM64 OpenHarmony
 `arm-unknown-linux-gnueabi` | Armv6 Linux (kernel 3.2+, glibc 2.17)
 `arm-unknown-linux-gnueabihf` | Armv6 Linux, hardfloat (kernel 3.2+, glibc 2.17)
@@ -333,7 +333,7 @@ target | std | host | notes
 `mips-unknown-linux-uclibc` | ✓ |  | MIPS Linux with uClibc
 [`mips64-openwrt-linux-musl`](platform-support/mips64-openwrt-linux-musl.md) | ? |  | MIPS64 for OpenWrt Linux musl 1.2.3
 `mips64-unknown-linux-gnuabi64` | ✓ | ✓ | MIPS64 Linux, N64 ABI (kernel 4.4, glibc 2.23)
-`mips64-unknown-linux-muslabi64` | ✓ |  | MIPS64 Linux, N64 ABI, musl 1.2.3
+[`mips64-unknown-linux-muslabi64`](platform-support/mips64-unknown-linux-muslabi64.md) | ✓ | ✓ | MIPS64 Linux, N64 ABI, musl 1.2.3
 `mips64el-unknown-linux-gnuabi64` | ✓ | ✓ | MIPS64 (little endian) Linux, N64 ABI (kernel 4.4, glibc 2.23)
 `mips64el-unknown-linux-muslabi64` | ✓ |  | MIPS64 (little endian) Linux, N64 ABI, musl 1.2.3
 `mipsel-sony-psp` | * |  | MIPS (LE) Sony PlayStation Portable (PSP)
diff --git a/src/doc/rustc/src/platform-support/aarch64-unknown-linux-musl.md b/src/doc/rustc/src/platform-support/aarch64-unknown-linux-musl.md
new file mode 100644
index 00000000000..5d9a552e460
--- /dev/null
+++ b/src/doc/rustc/src/platform-support/aarch64-unknown-linux-musl.md
@@ -0,0 +1,49 @@
+# aarch64-unknown-linux-musl
+
+**Tier: 2**
+
+Target for 64-bit little endian ARMv8-A Linux programs using musl libc.
+
+## Target maintainers
+
+[@Gelbpunkt](https://github.com/Gelbpunkt)
+[@famfo](https://github.com/famfo)
+
+## Requirements
+
+Building the target itself requires a 64-bit little endian ARMv8-A compiler
+that is supported by `cc-rs`.
+
+## Building the target
+
+The target can be built by enabling it for a `rustc` build.
+
+```toml
+[build]
+target = ["aarch64-unknown-linux-musl"]
+```
+
+Make sure your C compiler is included in `$PATH`, then add it to the
+`bootstrap.toml`:
+
+```toml
+[target.aarch64-unknown-linux-musl]
+cc = "aarch64-linux-musl-gcc"
+cxx = "aarch64-linux-musl-g++"
+ar = "aarch64-linux-musl-ar"
+linker = "aarch64-linux-musl-gcc"
+```
+
+## Building Rust programs
+
+This target is distributed through `rustup`, and otherwise requires no
+special configuration.
+
+## Cross-compilation
+
+This target can be cross-compiled from any host.
+
+## Testing
+
+This target can be tested as normal with `x.py` on a 64-bit little endian
+ARMv8-A host or via QEMU emulation.
diff --git a/src/doc/rustc/src/platform-support/mips64-unknown-linux-muslabi64.md b/src/doc/rustc/src/platform-support/mips64-unknown-linux-muslabi64.md
new file mode 100644
index 00000000000..60c0972bb3e
--- /dev/null
+++ b/src/doc/rustc/src/platform-support/mips64-unknown-linux-muslabi64.md
@@ -0,0 +1,49 @@
+# mips64-unknown-linux-muslabi64
+
+**Tier: 3**
+
+Target for 64-bit big endian MIPS Linux programs using musl libc and the N64 ABI.
+
+## Target maintainers
+
+[@Gelbpunkt](https://github.com/Gelbpunkt)
+
+## Requirements
+
+Building the target itself requires a 64-bit big endian MIPS compiler that is
+supported by `cc-rs`.
+
+## Building the target
+
+The target can be built by enabling it for a `rustc` build.
+
+```toml
+[build]
+target = ["mips64-unknown-linux-muslabi64"]
+```
+
+Make sure your C compiler is included in `$PATH`, then add it to the
+`bootstrap.toml`:
+
+```toml
+[target.mips64-unknown-linux-muslabi64]
+cc = "mips64-linux-musl-gcc"
+cxx = "mips64-linux-musl-g++"
+ar = "mips64-linux-musl-ar"
+linker = "mips64-linux-musl-gcc"
+```
+
+## Building Rust programs
+
+Rust does not yet ship pre-compiled artifacts for this target. To compile for
+this target, you will first need to build Rust with the target enabled (see
+"Building the target" above).
+
+## Cross-compilation
+
+This target can be cross-compiled from any host.
+
+## Testing
+
+This target can be tested as normal with `x.py` on a 64-bit big endian MIPS
+host or via QEMU emulation.
diff --git a/src/doc/rustc/src/platform-support/netbsd.md b/src/doc/rustc/src/platform-support/netbsd.md
index e80ff85edad..b173bf82b44 100644
--- a/src/doc/rustc/src/platform-support/netbsd.md
+++ b/src/doc/rustc/src/platform-support/netbsd.md
@@ -32,10 +32,11 @@ are built for NetBSD 8.x but also work on newer OS versions).
 ## Target Maintainers
 
 [@he32](https://github.com/he32)
+[@0323pin](https://github.com/0323pin)
 
 Further contacts:
 
-- [NetBSD/pkgsrc-wip's rust](https://github.com/NetBSD/pkgsrc-wip/blob/master/rust185/Makefile) maintainer (see MAINTAINER variable). This package is part of "pkgsrc work-in-progress" and is used for deployment and testing of new versions of rust
+- [NetBSD/pkgsrc-wip's rust](https://github.com/NetBSD/pkgsrc-wip/blob/master/rust188/Makefile) maintainer (see MAINTAINER variable). This package is part of "pkgsrc work-in-progress" and is used for deployment and testing of new versions of rust.  Note that we have the convention of having multiple rust versions active in pkgsrc-wip at any one time, so the version number is part of the directory name, and from time to time old versions are culled so this is not a fully "stable" link.
 - [NetBSD's pkgsrc lang/rust](https://github.com/NetBSD/pkgsrc/tree/trunk/lang/rust) for the "proper" package in pkgsrc.
 - [NetBSD's pkgsrc lang/rust-bin](https://github.com/NetBSD/pkgsrc/tree/trunk/lang/rust-bin) which re-uses the bootstrap kit as a binary distribution and therefore avoids the rather protracted native build time of rust itself
 
diff --git a/src/doc/rustc/src/platform-support/wasm32-wasip1.md b/src/doc/rustc/src/platform-support/wasm32-wasip1.md
index 4f065a554cf..a8a9e550581 100644
--- a/src/doc/rustc/src/platform-support/wasm32-wasip1.md
+++ b/src/doc/rustc/src/platform-support/wasm32-wasip1.md
@@ -4,37 +4,35 @@
 
 The `wasm32-wasip1` target is a WebAssembly compilation target which
 assumes that the [WASIp1] (aka "WASI preview1") set of "syscalls" are available
-for use in the standard library. Historically this target in the Rust compiler
-was one of the first for WebAssembly where Rust and C code are explicitly
-intended to interoperate as well.
-
-There's a bit of history to the target and current development which is also
-worth explaining before going much further. Historically this target was
-originally called `wasm32-wasi` in both rustc and Clang. This was first added
-to Rust in 2019. In the intervening years leading up to 2024 the WASI standard
-continued to be developed and was eventually "rebased" on top of the [Component
-Model]. This was a large change to the WASI specification and was released as
-0.2.0 ("WASIp2" colloquially) in January 2024. The previous target's name in
-rustc, `wasm32-wasi`, was then renamed to `wasm32-wasip1`, to avoid
-confusion with this new target to be added to rustc as `wasm32-wasip2`.
-Some more context can be found in these MCPs:
-
-* [Rename wasm32-wasi target to wasm32-wasip1](https://github.com/rust-lang/compiler-team/issues/607)
-* [Smooth the renaming transition of wasm32-wasi](https://github.com/rust-lang/compiler-team/issues/695)
-
-At this point the `wasm32-wasip1` target is intended for historical
-compatibility with the first version of the WASI standard. As of now (January
-2024) the 0.2.0 target of WASI ("WASIp2") is relatively new. The state of
-WASI will likely change in few years after which point this documentation will
-probably receive another update.
-
-[WASI Preview1]: https://github.com/WebAssembly/WASI/tree/main/legacy/preview1
+for use in the standard library. This target explicitly supports interop with
+non-Rust code such as C and C++.
+
+The [WASIp1] set of syscalls is standard insofar as it was written down once by
+a set of folks and has not changed since then. Additionally the [WASIp1]
+syscalls have been adapted and adopted into a number of runtimes and embeddings.
+It is not standard in the sense that there are no formal semantics for each
+syscall and APIs are no longer receiving any maintenance (e.g. no new APIs, no
+new documentation, etc). After [WASIp1] was originally developed in 2019 the
+WASI standard effort has since been "rebased" on top of the [Component Model].
+This was a large change to the WASI specification and was released as 0.2.0
+("WASIp2" colloquially) in January 2024. Current standardization efforts are
+focused on the Component Model-based definition of WASI. At this point the
+`wasm32-wasip1` Rust target is intended for historical compatibility with
+[WASIp1] set of syscalls.
+
+[WASIp1]: https://github.com/WebAssembly/WASI/tree/main/legacy/preview1
 [Component Model]: https://github.com/webassembly/component-model
 
 Today the `wasm32-wasip1` target will generate core WebAssembly modules
 which will import functions from the `wasi_snapshot_preview1` module for
 OS-related functionality (e.g. printing).
 
+> **Note**: Prior to March 2024 this target was known as `wasm32-wasi` with some
+> historical context found in old MCPs:
+>
+> * [Rename wasm32-wasi target to wasm32-wasip1](https://github.com/rust-lang/compiler-team/issues/607)
+> * [Smooth the renaming transition of wasm32-wasi](https://github.com/rust-lang/compiler-team/issues/695)
+
 ## Target maintainers
 
 When this target was added to the compiler platform-specific documentation here
@@ -44,6 +42,7 @@ said since when this document was last updated those interested in maintaining
 this target are:
 
 [@alexcrichton](https://github.com/alexcrichton)
+[@loganek](https://github.com/loganek)
 
 ## Requirements
 
diff --git a/src/doc/rustc/src/platform-support/xtensa.md b/src/doc/rustc/src/platform-support/xtensa.md
index 994b3adb92e..8592ce7eda9 100644
--- a/src/doc/rustc/src/platform-support/xtensa.md
+++ b/src/doc/rustc/src/platform-support/xtensa.md
@@ -24,4 +24,4 @@ Xtensa targets that support `std` are documented in the [ESP-IDF platform suppor
 
 ## Building the targets
 
-The targets can be built by installing the [Xtensa enabled Rust channel](https://github.com/esp-rs/rust/). See instructions in the [RISC-V and Xtensa Targets section of The Rust on ESP Book](https://docs.esp-rs.org/book/installation/riscv-and-xtensa.html).
+The targets can be built by installing the [Xtensa enabled Rust channel](https://github.com/esp-rs/rust/). See instructions in the [RISC-V and Xtensa Targets section of The Rust on ESP Book](https://docs.espressif.com/projects/rust/book/installation/index.html).
diff --git a/src/doc/unstable-book/src/compiler-flags/codegen-options.md b/src/doc/unstable-book/src/compiler-flags/codegen-options.md
index cc51554706d..f927e5c439c 100644
--- a/src/doc/unstable-book/src/compiler-flags/codegen-options.md
+++ b/src/doc/unstable-book/src/compiler-flags/codegen-options.md
@@ -51,10 +51,10 @@ instead of those in the system. The stable boolean values for this flag are coar
 - `mingw`: other MinGW libs and Windows import libs
 
 Out of the above self-contained linking components, `linker` is the only one currently implemented
-(beyond parsing the CLI options).
+(beyond parsing the CLI options) and stabilized.
 
 It refers to the LLD linker, built from the same LLVM revision used by rustc (named `rust-lld` to
 avoid naming conflicts), that is distributed via `rustup` with the compiler (and is used by default
-for the wasm targets). One can also opt-in to use it by combining this flag with an appropriate
-linker flavor: for example, `-Clinker-flavor=gnu-lld-cc -Clink-self-contained=+linker` will use the
-toolchain's `rust-lld` as the linker.
+for the wasm targets). One can also opt into using it by combining this flag with the appropriate
+linker feature: for example, `-Clinker-features=+lld -Clink-self-contained=+linker` will use the
+toolchain's `rust-lld` as the linker instead of the system's lld with `-Clinker-features=+lld` only.
diff --git a/src/doc/unstable-book/src/compiler-flags/linker-features.md b/src/doc/unstable-book/src/compiler-flags/linker-features.md
deleted file mode 100644
index 643fcf7c6d7..00000000000
--- a/src/doc/unstable-book/src/compiler-flags/linker-features.md
+++ /dev/null
@@ -1,35 +0,0 @@
-# `linker-features`
-
---------------------
-
-The `-Zlinker-features` compiler flag allows enabling or disabling specific features used during
-linking, and is intended to be stabilized under the codegen options as `-Clinker-features`.
-
-These feature flags are a flexible extension mechanism that is complementary to linker flavors,
-designed to avoid the combinatorial explosion of having to create a new set of flavors for each
-linker feature we'd want to use.
-
-For example, this design allows:
-- default feature sets for principal flavors, or for specific targets.
-- flavor-specific features: for example, clang offers automatic cross-linking with `--target`, which
-  gcc-style compilers don't support. The *flavor* is still a C/C++ compiler, and we don't want to
-  multiply the number of flavors for this use-case. Instead, we can have a single `+target` feature.
-- umbrella features: for example, if clang accumulates more features in the future than just the
-  `+target` above. That could be modeled as `+clang`.
-- niche features for resolving specific issues: for example, on Apple targets the linker flag
-  implementing the `as-needed` native link modifier (#99424) is only possible on sufficiently recent
-  linker versions.
-- still allows for discovery and automation, for example via feature detection. This can be useful
-  in exotic environments/build systems.
-
-The flag accepts a comma-separated list of features, individually enabled (`+features`) or disabled
-(`-features`), though currently only one is exposed on the CLI:
-- `lld`: to toggle using the lld linker, either the system-installed binary, or the self-contained
-  `rust-lld` linker.
-
-As described above, this list is intended to grow in the future.
-
-One of the most common uses of this flag will be to toggle self-contained linking with `rust-lld` on
-and off: `-Clinker-features=+lld -Clink-self-contained=+linker` will use the toolchain's `rust-lld`
-as the linker. Inversely, `-Clinker-features=-lld` would opt out of that, if the current target had
-self-contained linking enabled by default.
diff --git a/src/doc/unstable-book/src/compiler-flags/offload.md b/src/doc/unstable-book/src/compiler-flags/offload.md
new file mode 100644
index 00000000000..4266e8c11a2
--- /dev/null
+++ b/src/doc/unstable-book/src/compiler-flags/offload.md
@@ -0,0 +1,8 @@
+# `offload`
+
+The tracking issue for this feature is: [#131513](https://github.com/rust-lang/rust/issues/131513).
+
+------------------------
+
+This feature will later allow you to run functions on GPUs. It is work in progress.
+Set the `-Zoffload=Enable` compiler flag to experiment with it.
diff --git a/src/etc/completions/x.fish b/src/etc/completions/x.fish
index 69bd525a312..a5e5bb8f09e 100644
--- a/src/etc/completions/x.fish
+++ b/src/etc/completions/x.fish
@@ -1,6 +1,6 @@
 # Print an optspec for argparse to handle cmd's options that are independent of any subcommand.
 function __fish_x_global_optspecs
-	string join \n v/verbose i/incremental config= build-dir= build= host= target= exclude= skip= include-default-paths rustc-error-format= on-fail= dry-run dump-bootstrap-shims stage= keep-stage= keep-stage-std= src= j/jobs= warnings= json-output color= bypass-bootstrap-lock rust-profile-generate= rust-profile-use= llvm-profile-use= llvm-profile-generate enable-bolt-settings skip-stage0-validation reproducible-artifact= set= ci= skip-std-check-if-no-download-rustc h/help
+	string join \n v/verbose i/incremental config= build-dir= build= host= target= exclude= skip= include-default-paths rustc-error-format= on-fail= dry-run dump-bootstrap-shims stage= keep-stage= keep-stage-std= src= j/jobs= warnings= json-output compile-time-deps color= bypass-bootstrap-lock rust-profile-generate= rust-profile-use= llvm-profile-use= llvm-profile-generate enable-bolt-settings skip-stage0-validation reproducible-artifact= set= ci= skip-std-check-if-no-download-rustc h/help
 end
 
 function __fish_x_needs_command
@@ -52,6 +52,7 @@ complete -c x -n "__fish_x_needs_command" -l include-default-paths -d 'include d
 complete -c x -n "__fish_x_needs_command" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_needs_command" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_needs_command" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_needs_command" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_needs_command" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_needs_command" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_needs_command" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -72,7 +73,6 @@ complete -c x -n "__fish_x_needs_command" -a "dist" -d 'Build distribution artif
 complete -c x -n "__fish_x_needs_command" -a "install" -d 'Install distribution artifacts'
 complete -c x -n "__fish_x_needs_command" -a "run" -d 'Run tools contained in this repository'
 complete -c x -n "__fish_x_needs_command" -a "setup" -d 'Set up the environment for development'
-complete -c x -n "__fish_x_needs_command" -a "suggest" -d 'Suggest a subset of tests to run, based on modified files'
 complete -c x -n "__fish_x_needs_command" -a "vendor" -d 'Vendor dependencies'
 complete -c x -n "__fish_x_needs_command" -a "perf" -d 'Perform profiling and benchmarking of the compiler using `rustc-perf`'
 complete -c x -n "__fish_x_using_subcommand build" -l config -d 'TOML configuration file for build' -r -F
@@ -103,6 +103,7 @@ complete -c x -n "__fish_x_using_subcommand build" -l include-default-paths -d '
 complete -c x -n "__fish_x_using_subcommand build" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand build" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand build" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand build" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand build" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand build" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand build" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -138,6 +139,7 @@ complete -c x -n "__fish_x_using_subcommand check" -l include-default-paths -d '
 complete -c x -n "__fish_x_using_subcommand check" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand check" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand check" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand check" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand check" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand check" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand check" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -179,6 +181,7 @@ complete -c x -n "__fish_x_using_subcommand clippy" -l include-default-paths -d
 complete -c x -n "__fish_x_using_subcommand clippy" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand clippy" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand clippy" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand clippy" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand clippy" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand clippy" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand clippy" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -213,6 +216,7 @@ complete -c x -n "__fish_x_using_subcommand fix" -l include-default-paths -d 'in
 complete -c x -n "__fish_x_using_subcommand fix" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand fix" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand fix" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand fix" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand fix" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand fix" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand fix" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -249,6 +253,7 @@ complete -c x -n "__fish_x_using_subcommand fmt" -l include-default-paths -d 'in
 complete -c x -n "__fish_x_using_subcommand fmt" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand fmt" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand fmt" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand fmt" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand fmt" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand fmt" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand fmt" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -285,6 +290,7 @@ complete -c x -n "__fish_x_using_subcommand doc" -l include-default-paths -d 'in
 complete -c x -n "__fish_x_using_subcommand doc" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand doc" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand doc" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand doc" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand doc" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand doc" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand doc" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -293,7 +299,7 @@ complete -c x -n "__fish_x_using_subcommand doc" -l skip-std-check-if-no-downloa
 complete -c x -n "__fish_x_using_subcommand doc" -s h -l help -d 'Print help (see more with \'--help\')'
 complete -c x -n "__fish_x_using_subcommand test" -l test-args -d 'extra arguments to be passed for the test tool being used (e.g. libtest, compiletest or rustdoc)' -r
 complete -c x -n "__fish_x_using_subcommand test" -l compiletest-rustc-args -d 'extra options to pass the compiler when running compiletest tests' -r
-complete -c x -n "__fish_x_using_subcommand test" -l extra-checks -d 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell, shell:lint, cpp, cpp:fmt, spellcheck, spellcheck:fix)' -r
+complete -c x -n "__fish_x_using_subcommand test" -l extra-checks -d 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell, cpp, cpp:fmt, js, js:lint, js:typecheck, spellcheck)' -r
 complete -c x -n "__fish_x_using_subcommand test" -l compare-mode -d 'mode describing what file the actual ui output will be compared to' -r
 complete -c x -n "__fish_x_using_subcommand test" -l pass -d 'force {check,build,run}-pass tests to this mode' -r
 complete -c x -n "__fish_x_using_subcommand test" -l run -d 'whether to execute run-* tests' -r
@@ -333,6 +339,7 @@ complete -c x -n "__fish_x_using_subcommand test" -l include-default-paths -d 'i
 complete -c x -n "__fish_x_using_subcommand test" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand test" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand test" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand test" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand test" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand test" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand test" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -371,6 +378,7 @@ complete -c x -n "__fish_x_using_subcommand miri" -l include-default-paths -d 'i
 complete -c x -n "__fish_x_using_subcommand miri" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand miri" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand miri" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand miri" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand miri" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand miri" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand miri" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -406,6 +414,7 @@ complete -c x -n "__fish_x_using_subcommand bench" -l include-default-paths -d '
 complete -c x -n "__fish_x_using_subcommand bench" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand bench" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand bench" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand bench" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand bench" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand bench" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand bench" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -441,6 +450,7 @@ complete -c x -n "__fish_x_using_subcommand clean" -l include-default-paths -d '
 complete -c x -n "__fish_x_using_subcommand clean" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand clean" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand clean" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand clean" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand clean" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand clean" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand clean" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -475,6 +485,7 @@ complete -c x -n "__fish_x_using_subcommand dist" -l include-default-paths -d 'i
 complete -c x -n "__fish_x_using_subcommand dist" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand dist" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand dist" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand dist" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand dist" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand dist" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand dist" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -509,6 +520,7 @@ complete -c x -n "__fish_x_using_subcommand install" -l include-default-paths -d
 complete -c x -n "__fish_x_using_subcommand install" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand install" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand install" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand install" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand install" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand install" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand install" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -544,6 +556,7 @@ complete -c x -n "__fish_x_using_subcommand run" -l include-default-paths -d 'in
 complete -c x -n "__fish_x_using_subcommand run" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand run" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand run" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand run" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand run" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand run" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand run" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -578,47 +591,13 @@ complete -c x -n "__fish_x_using_subcommand setup" -l include-default-paths -d '
 complete -c x -n "__fish_x_using_subcommand setup" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand setup" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand setup" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand setup" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand setup" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand setup" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand setup" -l enable-bolt-settings -d 'Enable BOLT link flags'
 complete -c x -n "__fish_x_using_subcommand setup" -l skip-stage0-validation -d 'Skip stage0 compiler validation'
 complete -c x -n "__fish_x_using_subcommand setup" -l skip-std-check-if-no-download-rustc -d 'Skip checking the standard library if `rust.download-rustc` isn\'t available. This is mostly for RA as building the stage1 compiler to check the library tree on each code change might be too much for some computers'
 complete -c x -n "__fish_x_using_subcommand setup" -s h -l help -d 'Print help (see more with \'--help\')'
-complete -c x -n "__fish_x_using_subcommand suggest" -l config -d 'TOML configuration file for build' -r -F
-complete -c x -n "__fish_x_using_subcommand suggest" -l build-dir -d 'Build directory, overrides `build.build-dir` in `bootstrap.toml`' -r -f -a "(__fish_complete_directories)"
-complete -c x -n "__fish_x_using_subcommand suggest" -l build -d 'host target of the stage0 compiler' -r -f
-complete -c x -n "__fish_x_using_subcommand suggest" -l host -d 'host targets to build' -r -f
-complete -c x -n "__fish_x_using_subcommand suggest" -l target -d 'target targets to build' -r -f
-complete -c x -n "__fish_x_using_subcommand suggest" -l exclude -d 'build paths to exclude' -r -F
-complete -c x -n "__fish_x_using_subcommand suggest" -l skip -d 'build paths to skip' -r -F
-complete -c x -n "__fish_x_using_subcommand suggest" -l rustc-error-format -d 'rustc error format' -r -f
-complete -c x -n "__fish_x_using_subcommand suggest" -l on-fail -d 'command to run on failure' -r -f -a "(__fish_complete_command)"
-complete -c x -n "__fish_x_using_subcommand suggest" -l stage -d 'stage to build (indicates compiler to use/test, e.g., stage 0 uses the bootstrap compiler, stage 1 the stage 0 rustc artifacts, etc.)' -r -f
-complete -c x -n "__fish_x_using_subcommand suggest" -l keep-stage -d 'stage(s) to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)' -r -f
-complete -c x -n "__fish_x_using_subcommand suggest" -l keep-stage-std -d 'stage(s) of the standard library to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)' -r -f
-complete -c x -n "__fish_x_using_subcommand suggest" -l src -d 'path to the root of the rust checkout' -r -f -a "(__fish_complete_directories)"
-complete -c x -n "__fish_x_using_subcommand suggest" -s j -l jobs -d 'number of jobs to run in parallel' -r -f
-complete -c x -n "__fish_x_using_subcommand suggest" -l warnings -d 'if value is deny, will deny warnings if value is warn, will emit warnings otherwise, use the default configured behaviour' -r -f -a "{deny\t'',warn\t'',default\t''}"
-complete -c x -n "__fish_x_using_subcommand suggest" -l color -d 'whether to use color in cargo and rustc output' -r -f -a "{always\t'',never\t'',auto\t''}"
-complete -c x -n "__fish_x_using_subcommand suggest" -l rust-profile-generate -d 'generate PGO profile with rustc build' -r -F
-complete -c x -n "__fish_x_using_subcommand suggest" -l rust-profile-use -d 'use PGO profile for rustc build' -r -F
-complete -c x -n "__fish_x_using_subcommand suggest" -l llvm-profile-use -d 'use PGO profile for LLVM build' -r -F
-complete -c x -n "__fish_x_using_subcommand suggest" -l reproducible-artifact -d 'Additional reproducible artifacts that should be added to the reproducible artifacts archive' -r
-complete -c x -n "__fish_x_using_subcommand suggest" -l set -d 'override options in bootstrap.toml' -r -f
-complete -c x -n "__fish_x_using_subcommand suggest" -l ci -d 'Make bootstrap to behave as it\'s running on the CI environment or not' -r -f -a "{true\t'',false\t''}"
-complete -c x -n "__fish_x_using_subcommand suggest" -l run -d 'run suggested tests'
-complete -c x -n "__fish_x_using_subcommand suggest" -s v -l verbose -d 'use verbose output (-vv for very verbose)'
-complete -c x -n "__fish_x_using_subcommand suggest" -s i -l incremental -d 'use incremental compilation'
-complete -c x -n "__fish_x_using_subcommand suggest" -l include-default-paths -d 'include default paths in addition to the provided ones'
-complete -c x -n "__fish_x_using_subcommand suggest" -l dry-run -d 'dry run; don\'t build anything'
-complete -c x -n "__fish_x_using_subcommand suggest" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
-complete -c x -n "__fish_x_using_subcommand suggest" -l json-output -d 'use message-format=json'
-complete -c x -n "__fish_x_using_subcommand suggest" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
-complete -c x -n "__fish_x_using_subcommand suggest" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
-complete -c x -n "__fish_x_using_subcommand suggest" -l enable-bolt-settings -d 'Enable BOLT link flags'
-complete -c x -n "__fish_x_using_subcommand suggest" -l skip-stage0-validation -d 'Skip stage0 compiler validation'
-complete -c x -n "__fish_x_using_subcommand suggest" -l skip-std-check-if-no-download-rustc -d 'Skip checking the standard library if `rust.download-rustc` isn\'t available. This is mostly for RA as building the stage1 compiler to check the library tree on each code change might be too much for some computers'
-complete -c x -n "__fish_x_using_subcommand suggest" -s h -l help -d 'Print help (see more with \'--help\')'
 complete -c x -n "__fish_x_using_subcommand vendor" -l sync -d 'Additional `Cargo.toml` to sync and vendor' -r -F
 complete -c x -n "__fish_x_using_subcommand vendor" -l config -d 'TOML configuration file for build' -r -F
 complete -c x -n "__fish_x_using_subcommand vendor" -l build-dir -d 'Build directory, overrides `build.build-dir` in `bootstrap.toml`' -r -f -a "(__fish_complete_directories)"
@@ -649,6 +628,7 @@ complete -c x -n "__fish_x_using_subcommand vendor" -l include-default-paths -d
 complete -c x -n "__fish_x_using_subcommand vendor" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand vendor" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand vendor" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand vendor" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand vendor" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand vendor" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand vendor" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -683,6 +663,7 @@ complete -c x -n "__fish_x_using_subcommand perf; and not __fish_seen_subcommand
 complete -c x -n "__fish_x_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -725,6 +706,7 @@ complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_fro
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -762,6 +744,7 @@ complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_fro
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from samply" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from samply" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from samply" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from samply" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from samply" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from samply" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from samply" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -799,6 +782,7 @@ complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_fro
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -836,6 +820,7 @@ complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_fro
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -870,6 +855,7 @@ complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_fro
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from compare" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from compare" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from compare" -l json-output -d 'use message-format=json'
+complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from compare" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from compare" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from compare" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x -n "__fish_x_using_subcommand perf; and __fish_seen_subcommand_from compare" -l enable-bolt-settings -d 'Enable BOLT link flags'
diff --git a/src/etc/completions/x.ps1 b/src/etc/completions/x.ps1
index 7b142ba97ce..4fee3bc0a86 100644
--- a/src/etc/completions/x.ps1
+++ b/src/etc/completions/x.ps1
@@ -52,6 +52,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -73,7 +74,6 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('install', 'install', [CompletionResultType]::ParameterValue, 'Install distribution artifacts')
             [CompletionResult]::new('run', 'run', [CompletionResultType]::ParameterValue, 'Run tools contained in this repository')
             [CompletionResult]::new('setup', 'setup', [CompletionResultType]::ParameterValue, 'Set up the environment for development')
-            [CompletionResult]::new('suggest', 'suggest', [CompletionResultType]::ParameterValue, 'Suggest a subset of tests to run, based on modified files')
             [CompletionResult]::new('vendor', 'vendor', [CompletionResultType]::ParameterValue, 'Vendor dependencies')
             [CompletionResult]::new('perf', 'perf', [CompletionResultType]::ParameterValue, 'Perform profiling and benchmarking of the compiler using `rustc-perf`')
             break
@@ -110,6 +110,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -152,6 +153,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -200,6 +202,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -241,6 +244,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -284,6 +288,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -327,6 +332,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -339,7 +345,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
         'x;test' {
             [CompletionResult]::new('--test-args', '--test-args', [CompletionResultType]::ParameterName, 'extra arguments to be passed for the test tool being used (e.g. libtest, compiletest or rustdoc)')
             [CompletionResult]::new('--compiletest-rustc-args', '--compiletest-rustc-args', [CompletionResultType]::ParameterName, 'extra options to pass the compiler when running compiletest tests')
-            [CompletionResult]::new('--extra-checks', '--extra-checks', [CompletionResultType]::ParameterName, 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell, shell:lint, cpp, cpp:fmt, spellcheck, spellcheck:fix)')
+            [CompletionResult]::new('--extra-checks', '--extra-checks', [CompletionResultType]::ParameterName, 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell, cpp, cpp:fmt, js, js:lint, js:typecheck, spellcheck)')
             [CompletionResult]::new('--compare-mode', '--compare-mode', [CompletionResultType]::ParameterName, 'mode describing what file the actual ui output will be compared to')
             [CompletionResult]::new('--pass', '--pass', [CompletionResultType]::ParameterName, 'force {check,build,run}-pass tests to this mode')
             [CompletionResult]::new('--run', '--run', [CompletionResultType]::ParameterName, 'whether to execute run-* tests')
@@ -382,6 +388,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -427,6 +434,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -469,6 +477,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -511,6 +520,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -552,6 +562,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -593,6 +604,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -635,6 +647,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -676,48 +689,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
-            [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
-            [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
-            [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
-            [CompletionResult]::new('--skip-stage0-validation', '--skip-stage0-validation', [CompletionResultType]::ParameterName, 'Skip stage0 compiler validation')
-            [CompletionResult]::new('--skip-std-check-if-no-download-rustc', '--skip-std-check-if-no-download-rustc', [CompletionResultType]::ParameterName, 'Skip checking the standard library if `rust.download-rustc` isn''t available. This is mostly for RA as building the stage1 compiler to check the library tree on each code change might be too much for some computers')
-            [CompletionResult]::new('-h', '-h', [CompletionResultType]::ParameterName, 'Print help (see more with ''--help'')')
-            [CompletionResult]::new('--help', '--help', [CompletionResultType]::ParameterName, 'Print help (see more with ''--help'')')
-            break
-        }
-        'x;suggest' {
-            [CompletionResult]::new('--config', '--config', [CompletionResultType]::ParameterName, 'TOML configuration file for build')
-            [CompletionResult]::new('--build-dir', '--build-dir', [CompletionResultType]::ParameterName, 'Build directory, overrides `build.build-dir` in `bootstrap.toml`')
-            [CompletionResult]::new('--build', '--build', [CompletionResultType]::ParameterName, 'host target of the stage0 compiler')
-            [CompletionResult]::new('--host', '--host', [CompletionResultType]::ParameterName, 'host targets to build')
-            [CompletionResult]::new('--target', '--target', [CompletionResultType]::ParameterName, 'target targets to build')
-            [CompletionResult]::new('--exclude', '--exclude', [CompletionResultType]::ParameterName, 'build paths to exclude')
-            [CompletionResult]::new('--skip', '--skip', [CompletionResultType]::ParameterName, 'build paths to skip')
-            [CompletionResult]::new('--rustc-error-format', '--rustc-error-format', [CompletionResultType]::ParameterName, 'rustc error format')
-            [CompletionResult]::new('--on-fail', '--on-fail', [CompletionResultType]::ParameterName, 'command to run on failure')
-            [CompletionResult]::new('--stage', '--stage', [CompletionResultType]::ParameterName, 'stage to build (indicates compiler to use/test, e.g., stage 0 uses the bootstrap compiler, stage 1 the stage 0 rustc artifacts, etc.)')
-            [CompletionResult]::new('--keep-stage', '--keep-stage', [CompletionResultType]::ParameterName, 'stage(s) to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)')
-            [CompletionResult]::new('--keep-stage-std', '--keep-stage-std', [CompletionResultType]::ParameterName, 'stage(s) of the standard library to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)')
-            [CompletionResult]::new('--src', '--src', [CompletionResultType]::ParameterName, 'path to the root of the rust checkout')
-            [CompletionResult]::new('-j', '-j', [CompletionResultType]::ParameterName, 'number of jobs to run in parallel')
-            [CompletionResult]::new('--jobs', '--jobs', [CompletionResultType]::ParameterName, 'number of jobs to run in parallel')
-            [CompletionResult]::new('--warnings', '--warnings', [CompletionResultType]::ParameterName, 'if value is deny, will deny warnings if value is warn, will emit warnings otherwise, use the default configured behaviour')
-            [CompletionResult]::new('--color', '--color', [CompletionResultType]::ParameterName, 'whether to use color in cargo and rustc output')
-            [CompletionResult]::new('--rust-profile-generate', '--rust-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with rustc build')
-            [CompletionResult]::new('--rust-profile-use', '--rust-profile-use', [CompletionResultType]::ParameterName, 'use PGO profile for rustc build')
-            [CompletionResult]::new('--llvm-profile-use', '--llvm-profile-use', [CompletionResultType]::ParameterName, 'use PGO profile for LLVM build')
-            [CompletionResult]::new('--reproducible-artifact', '--reproducible-artifact', [CompletionResultType]::ParameterName, 'Additional reproducible artifacts that should be added to the reproducible artifacts archive')
-            [CompletionResult]::new('--set', '--set', [CompletionResultType]::ParameterName, 'override options in bootstrap.toml')
-            [CompletionResult]::new('--ci', '--ci', [CompletionResultType]::ParameterName, 'Make bootstrap to behave as it''s running on the CI environment or not')
-            [CompletionResult]::new('--run', '--run', [CompletionResultType]::ParameterName, 'run suggested tests')
-            [CompletionResult]::new('-v', '-v', [CompletionResultType]::ParameterName, 'use verbose output (-vv for very verbose)')
-            [CompletionResult]::new('--verbose', '--verbose', [CompletionResultType]::ParameterName, 'use verbose output (-vv for very verbose)')
-            [CompletionResult]::new('-i', '-i', [CompletionResultType]::ParameterName, 'use incremental compilation')
-            [CompletionResult]::new('--incremental', '--incremental', [CompletionResultType]::ParameterName, 'use incremental compilation')
-            [CompletionResult]::new('--include-default-paths', '--include-default-paths', [CompletionResultType]::ParameterName, 'include default paths in addition to the provided ones')
-            [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
-            [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
-            [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -761,6 +733,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -802,6 +775,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -851,6 +825,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -895,6 +870,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -939,6 +915,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -983,6 +960,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -1024,6 +1002,7 @@ Register-ArgumentCompleter -Native -CommandName 'x' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
diff --git a/src/etc/completions/x.py.fish b/src/etc/completions/x.py.fish
index e982cde634f..e2e6ae05ee0 100644
--- a/src/etc/completions/x.py.fish
+++ b/src/etc/completions/x.py.fish
@@ -1,6 +1,6 @@
 # Print an optspec for argparse to handle cmd's options that are independent of any subcommand.
 function __fish_x.py_global_optspecs
-	string join \n v/verbose i/incremental config= build-dir= build= host= target= exclude= skip= include-default-paths rustc-error-format= on-fail= dry-run dump-bootstrap-shims stage= keep-stage= keep-stage-std= src= j/jobs= warnings= json-output color= bypass-bootstrap-lock rust-profile-generate= rust-profile-use= llvm-profile-use= llvm-profile-generate enable-bolt-settings skip-stage0-validation reproducible-artifact= set= ci= skip-std-check-if-no-download-rustc h/help
+	string join \n v/verbose i/incremental config= build-dir= build= host= target= exclude= skip= include-default-paths rustc-error-format= on-fail= dry-run dump-bootstrap-shims stage= keep-stage= keep-stage-std= src= j/jobs= warnings= json-output compile-time-deps color= bypass-bootstrap-lock rust-profile-generate= rust-profile-use= llvm-profile-use= llvm-profile-generate enable-bolt-settings skip-stage0-validation reproducible-artifact= set= ci= skip-std-check-if-no-download-rustc h/help
 end
 
 function __fish_x.py_needs_command
@@ -52,6 +52,7 @@ complete -c x.py -n "__fish_x.py_needs_command" -l include-default-paths -d 'inc
 complete -c x.py -n "__fish_x.py_needs_command" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_needs_command" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_needs_command" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_needs_command" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_needs_command" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_needs_command" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_needs_command" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -72,7 +73,6 @@ complete -c x.py -n "__fish_x.py_needs_command" -a "dist" -d 'Build distribution
 complete -c x.py -n "__fish_x.py_needs_command" -a "install" -d 'Install distribution artifacts'
 complete -c x.py -n "__fish_x.py_needs_command" -a "run" -d 'Run tools contained in this repository'
 complete -c x.py -n "__fish_x.py_needs_command" -a "setup" -d 'Set up the environment for development'
-complete -c x.py -n "__fish_x.py_needs_command" -a "suggest" -d 'Suggest a subset of tests to run, based on modified files'
 complete -c x.py -n "__fish_x.py_needs_command" -a "vendor" -d 'Vendor dependencies'
 complete -c x.py -n "__fish_x.py_needs_command" -a "perf" -d 'Perform profiling and benchmarking of the compiler using `rustc-perf`'
 complete -c x.py -n "__fish_x.py_using_subcommand build" -l config -d 'TOML configuration file for build' -r -F
@@ -103,6 +103,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand build" -l include-default-path
 complete -c x.py -n "__fish_x.py_using_subcommand build" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand build" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand build" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand build" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand build" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand build" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand build" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -138,6 +139,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand check" -l include-default-path
 complete -c x.py -n "__fish_x.py_using_subcommand check" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand check" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand check" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand check" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand check" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand check" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand check" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -179,6 +181,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand clippy" -l include-default-pat
 complete -c x.py -n "__fish_x.py_using_subcommand clippy" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand clippy" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand clippy" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand clippy" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand clippy" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand clippy" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand clippy" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -213,6 +216,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand fix" -l include-default-paths
 complete -c x.py -n "__fish_x.py_using_subcommand fix" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand fix" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand fix" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand fix" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand fix" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand fix" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand fix" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -249,6 +253,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand fmt" -l include-default-paths
 complete -c x.py -n "__fish_x.py_using_subcommand fmt" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand fmt" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand fmt" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand fmt" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand fmt" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand fmt" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand fmt" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -285,6 +290,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand doc" -l include-default-paths
 complete -c x.py -n "__fish_x.py_using_subcommand doc" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand doc" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand doc" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand doc" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand doc" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand doc" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand doc" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -293,7 +299,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand doc" -l skip-std-check-if-no-d
 complete -c x.py -n "__fish_x.py_using_subcommand doc" -s h -l help -d 'Print help (see more with \'--help\')'
 complete -c x.py -n "__fish_x.py_using_subcommand test" -l test-args -d 'extra arguments to be passed for the test tool being used (e.g. libtest, compiletest or rustdoc)' -r
 complete -c x.py -n "__fish_x.py_using_subcommand test" -l compiletest-rustc-args -d 'extra options to pass the compiler when running compiletest tests' -r
-complete -c x.py -n "__fish_x.py_using_subcommand test" -l extra-checks -d 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell, shell:lint, cpp, cpp:fmt, spellcheck, spellcheck:fix)' -r
+complete -c x.py -n "__fish_x.py_using_subcommand test" -l extra-checks -d 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell, cpp, cpp:fmt, js, js:lint, js:typecheck, spellcheck)' -r
 complete -c x.py -n "__fish_x.py_using_subcommand test" -l compare-mode -d 'mode describing what file the actual ui output will be compared to' -r
 complete -c x.py -n "__fish_x.py_using_subcommand test" -l pass -d 'force {check,build,run}-pass tests to this mode' -r
 complete -c x.py -n "__fish_x.py_using_subcommand test" -l run -d 'whether to execute run-* tests' -r
@@ -333,6 +339,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand test" -l include-default-paths
 complete -c x.py -n "__fish_x.py_using_subcommand test" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand test" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand test" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand test" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand test" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand test" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand test" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -371,6 +378,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand miri" -l include-default-paths
 complete -c x.py -n "__fish_x.py_using_subcommand miri" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand miri" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand miri" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand miri" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand miri" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand miri" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand miri" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -406,6 +414,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand bench" -l include-default-path
 complete -c x.py -n "__fish_x.py_using_subcommand bench" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand bench" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand bench" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand bench" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand bench" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand bench" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand bench" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -441,6 +450,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand clean" -l include-default-path
 complete -c x.py -n "__fish_x.py_using_subcommand clean" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand clean" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand clean" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand clean" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand clean" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand clean" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand clean" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -475,6 +485,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand dist" -l include-default-paths
 complete -c x.py -n "__fish_x.py_using_subcommand dist" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand dist" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand dist" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand dist" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand dist" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand dist" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand dist" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -509,6 +520,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand install" -l include-default-pa
 complete -c x.py -n "__fish_x.py_using_subcommand install" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand install" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand install" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand install" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand install" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand install" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand install" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -544,6 +556,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand run" -l include-default-paths
 complete -c x.py -n "__fish_x.py_using_subcommand run" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand run" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand run" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand run" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand run" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand run" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand run" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -578,47 +591,13 @@ complete -c x.py -n "__fish_x.py_using_subcommand setup" -l include-default-path
 complete -c x.py -n "__fish_x.py_using_subcommand setup" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand setup" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand setup" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand setup" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand setup" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand setup" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand setup" -l enable-bolt-settings -d 'Enable BOLT link flags'
 complete -c x.py -n "__fish_x.py_using_subcommand setup" -l skip-stage0-validation -d 'Skip stage0 compiler validation'
 complete -c x.py -n "__fish_x.py_using_subcommand setup" -l skip-std-check-if-no-download-rustc -d 'Skip checking the standard library if `rust.download-rustc` isn\'t available. This is mostly for RA as building the stage1 compiler to check the library tree on each code change might be too much for some computers'
 complete -c x.py -n "__fish_x.py_using_subcommand setup" -s h -l help -d 'Print help (see more with \'--help\')'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l config -d 'TOML configuration file for build' -r -F
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l build-dir -d 'Build directory, overrides `build.build-dir` in `bootstrap.toml`' -r -f -a "(__fish_complete_directories)"
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l build -d 'host target of the stage0 compiler' -r -f
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l host -d 'host targets to build' -r -f
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l target -d 'target targets to build' -r -f
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l exclude -d 'build paths to exclude' -r -F
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l skip -d 'build paths to skip' -r -F
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l rustc-error-format -d 'rustc error format' -r -f
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l on-fail -d 'command to run on failure' -r -f -a "(__fish_complete_command)"
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l stage -d 'stage to build (indicates compiler to use/test, e.g., stage 0 uses the bootstrap compiler, stage 1 the stage 0 rustc artifacts, etc.)' -r -f
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l keep-stage -d 'stage(s) to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)' -r -f
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l keep-stage-std -d 'stage(s) of the standard library to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)' -r -f
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l src -d 'path to the root of the rust checkout' -r -f -a "(__fish_complete_directories)"
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -s j -l jobs -d 'number of jobs to run in parallel' -r -f
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l warnings -d 'if value is deny, will deny warnings if value is warn, will emit warnings otherwise, use the default configured behaviour' -r -f -a "{deny\t'',warn\t'',default\t''}"
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l color -d 'whether to use color in cargo and rustc output' -r -f -a "{always\t'',never\t'',auto\t''}"
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l rust-profile-generate -d 'generate PGO profile with rustc build' -r -F
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l rust-profile-use -d 'use PGO profile for rustc build' -r -F
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l llvm-profile-use -d 'use PGO profile for LLVM build' -r -F
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l reproducible-artifact -d 'Additional reproducible artifacts that should be added to the reproducible artifacts archive' -r
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l set -d 'override options in bootstrap.toml' -r -f
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l ci -d 'Make bootstrap to behave as it\'s running on the CI environment or not' -r -f -a "{true\t'',false\t''}"
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l run -d 'run suggested tests'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -s v -l verbose -d 'use verbose output (-vv for very verbose)'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -s i -l incremental -d 'use incremental compilation'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l include-default-paths -d 'include default paths in addition to the provided ones'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l dry-run -d 'dry run; don\'t build anything'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l json-output -d 'use message-format=json'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l enable-bolt-settings -d 'Enable BOLT link flags'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l skip-stage0-validation -d 'Skip stage0 compiler validation'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -l skip-std-check-if-no-download-rustc -d 'Skip checking the standard library if `rust.download-rustc` isn\'t available. This is mostly for RA as building the stage1 compiler to check the library tree on each code change might be too much for some computers'
-complete -c x.py -n "__fish_x.py_using_subcommand suggest" -s h -l help -d 'Print help (see more with \'--help\')'
 complete -c x.py -n "__fish_x.py_using_subcommand vendor" -l sync -d 'Additional `Cargo.toml` to sync and vendor' -r -F
 complete -c x.py -n "__fish_x.py_using_subcommand vendor" -l config -d 'TOML configuration file for build' -r -F
 complete -c x.py -n "__fish_x.py_using_subcommand vendor" -l build-dir -d 'Build directory, overrides `build.build-dir` in `bootstrap.toml`' -r -f -a "(__fish_complete_directories)"
@@ -649,6 +628,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand vendor" -l include-default-pat
 complete -c x.py -n "__fish_x.py_using_subcommand vendor" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand vendor" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand vendor" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand vendor" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand vendor" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand vendor" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand vendor" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -683,6 +663,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand perf; and not __fish_seen_subc
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and not __fish_seen_subcommand_from eprintln samply cachegrind benchmark compare" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -725,6 +706,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcomma
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from eprintln" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -762,6 +744,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcomma
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from samply" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from samply" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from samply" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from samply" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from samply" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from samply" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from samply" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -799,6 +782,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcomma
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from cachegrind" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -836,6 +820,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcomma
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from benchmark" -l enable-bolt-settings -d 'Enable BOLT link flags'
@@ -870,6 +855,7 @@ complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcomma
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from compare" -l dry-run -d 'dry run; don\'t build anything'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from compare" -l dump-bootstrap-shims -d 'Indicates whether to dump the work done from bootstrap shims'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from compare" -l json-output -d 'use message-format=json'
+complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from compare" -l compile-time-deps -d 'only build proc-macros and build scripts (for rust-analyzer)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from compare" -l bypass-bootstrap-lock -d 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from compare" -l llvm-profile-generate -d 'generate PGO profile with llvm built for rustc'
 complete -c x.py -n "__fish_x.py_using_subcommand perf; and __fish_seen_subcommand_from compare" -l enable-bolt-settings -d 'Enable BOLT link flags'
diff --git a/src/etc/completions/x.py.ps1 b/src/etc/completions/x.py.ps1
index f4b26fac0bc..ea3aacc21c7 100644
--- a/src/etc/completions/x.py.ps1
+++ b/src/etc/completions/x.py.ps1
@@ -52,6 +52,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -73,7 +74,6 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('install', 'install', [CompletionResultType]::ParameterValue, 'Install distribution artifacts')
             [CompletionResult]::new('run', 'run', [CompletionResultType]::ParameterValue, 'Run tools contained in this repository')
             [CompletionResult]::new('setup', 'setup', [CompletionResultType]::ParameterValue, 'Set up the environment for development')
-            [CompletionResult]::new('suggest', 'suggest', [CompletionResultType]::ParameterValue, 'Suggest a subset of tests to run, based on modified files')
             [CompletionResult]::new('vendor', 'vendor', [CompletionResultType]::ParameterValue, 'Vendor dependencies')
             [CompletionResult]::new('perf', 'perf', [CompletionResultType]::ParameterValue, 'Perform profiling and benchmarking of the compiler using `rustc-perf`')
             break
@@ -110,6 +110,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -152,6 +153,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -200,6 +202,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -241,6 +244,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -284,6 +288,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -327,6 +332,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -339,7 +345,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
         'x.py;test' {
             [CompletionResult]::new('--test-args', '--test-args', [CompletionResultType]::ParameterName, 'extra arguments to be passed for the test tool being used (e.g. libtest, compiletest or rustdoc)')
             [CompletionResult]::new('--compiletest-rustc-args', '--compiletest-rustc-args', [CompletionResultType]::ParameterName, 'extra options to pass the compiler when running compiletest tests')
-            [CompletionResult]::new('--extra-checks', '--extra-checks', [CompletionResultType]::ParameterName, 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell, shell:lint, cpp, cpp:fmt, spellcheck, spellcheck:fix)')
+            [CompletionResult]::new('--extra-checks', '--extra-checks', [CompletionResultType]::ParameterName, 'comma-separated list of other files types to check (accepts py, py:lint, py:fmt, shell, cpp, cpp:fmt, js, js:lint, js:typecheck, spellcheck)')
             [CompletionResult]::new('--compare-mode', '--compare-mode', [CompletionResultType]::ParameterName, 'mode describing what file the actual ui output will be compared to')
             [CompletionResult]::new('--pass', '--pass', [CompletionResultType]::ParameterName, 'force {check,build,run}-pass tests to this mode')
             [CompletionResult]::new('--run', '--run', [CompletionResultType]::ParameterName, 'whether to execute run-* tests')
@@ -382,6 +388,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -427,6 +434,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -469,6 +477,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -511,6 +520,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -552,6 +562,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -593,6 +604,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -635,6 +647,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -676,48 +689,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
-            [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
-            [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
-            [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
-            [CompletionResult]::new('--skip-stage0-validation', '--skip-stage0-validation', [CompletionResultType]::ParameterName, 'Skip stage0 compiler validation')
-            [CompletionResult]::new('--skip-std-check-if-no-download-rustc', '--skip-std-check-if-no-download-rustc', [CompletionResultType]::ParameterName, 'Skip checking the standard library if `rust.download-rustc` isn''t available. This is mostly for RA as building the stage1 compiler to check the library tree on each code change might be too much for some computers')
-            [CompletionResult]::new('-h', '-h', [CompletionResultType]::ParameterName, 'Print help (see more with ''--help'')')
-            [CompletionResult]::new('--help', '--help', [CompletionResultType]::ParameterName, 'Print help (see more with ''--help'')')
-            break
-        }
-        'x.py;suggest' {
-            [CompletionResult]::new('--config', '--config', [CompletionResultType]::ParameterName, 'TOML configuration file for build')
-            [CompletionResult]::new('--build-dir', '--build-dir', [CompletionResultType]::ParameterName, 'Build directory, overrides `build.build-dir` in `bootstrap.toml`')
-            [CompletionResult]::new('--build', '--build', [CompletionResultType]::ParameterName, 'host target of the stage0 compiler')
-            [CompletionResult]::new('--host', '--host', [CompletionResultType]::ParameterName, 'host targets to build')
-            [CompletionResult]::new('--target', '--target', [CompletionResultType]::ParameterName, 'target targets to build')
-            [CompletionResult]::new('--exclude', '--exclude', [CompletionResultType]::ParameterName, 'build paths to exclude')
-            [CompletionResult]::new('--skip', '--skip', [CompletionResultType]::ParameterName, 'build paths to skip')
-            [CompletionResult]::new('--rustc-error-format', '--rustc-error-format', [CompletionResultType]::ParameterName, 'rustc error format')
-            [CompletionResult]::new('--on-fail', '--on-fail', [CompletionResultType]::ParameterName, 'command to run on failure')
-            [CompletionResult]::new('--stage', '--stage', [CompletionResultType]::ParameterName, 'stage to build (indicates compiler to use/test, e.g., stage 0 uses the bootstrap compiler, stage 1 the stage 0 rustc artifacts, etc.)')
-            [CompletionResult]::new('--keep-stage', '--keep-stage', [CompletionResultType]::ParameterName, 'stage(s) to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)')
-            [CompletionResult]::new('--keep-stage-std', '--keep-stage-std', [CompletionResultType]::ParameterName, 'stage(s) of the standard library to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)')
-            [CompletionResult]::new('--src', '--src', [CompletionResultType]::ParameterName, 'path to the root of the rust checkout')
-            [CompletionResult]::new('-j', '-j', [CompletionResultType]::ParameterName, 'number of jobs to run in parallel')
-            [CompletionResult]::new('--jobs', '--jobs', [CompletionResultType]::ParameterName, 'number of jobs to run in parallel')
-            [CompletionResult]::new('--warnings', '--warnings', [CompletionResultType]::ParameterName, 'if value is deny, will deny warnings if value is warn, will emit warnings otherwise, use the default configured behaviour')
-            [CompletionResult]::new('--color', '--color', [CompletionResultType]::ParameterName, 'whether to use color in cargo and rustc output')
-            [CompletionResult]::new('--rust-profile-generate', '--rust-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with rustc build')
-            [CompletionResult]::new('--rust-profile-use', '--rust-profile-use', [CompletionResultType]::ParameterName, 'use PGO profile for rustc build')
-            [CompletionResult]::new('--llvm-profile-use', '--llvm-profile-use', [CompletionResultType]::ParameterName, 'use PGO profile for LLVM build')
-            [CompletionResult]::new('--reproducible-artifact', '--reproducible-artifact', [CompletionResultType]::ParameterName, 'Additional reproducible artifacts that should be added to the reproducible artifacts archive')
-            [CompletionResult]::new('--set', '--set', [CompletionResultType]::ParameterName, 'override options in bootstrap.toml')
-            [CompletionResult]::new('--ci', '--ci', [CompletionResultType]::ParameterName, 'Make bootstrap to behave as it''s running on the CI environment or not')
-            [CompletionResult]::new('--run', '--run', [CompletionResultType]::ParameterName, 'run suggested tests')
-            [CompletionResult]::new('-v', '-v', [CompletionResultType]::ParameterName, 'use verbose output (-vv for very verbose)')
-            [CompletionResult]::new('--verbose', '--verbose', [CompletionResultType]::ParameterName, 'use verbose output (-vv for very verbose)')
-            [CompletionResult]::new('-i', '-i', [CompletionResultType]::ParameterName, 'use incremental compilation')
-            [CompletionResult]::new('--incremental', '--incremental', [CompletionResultType]::ParameterName, 'use incremental compilation')
-            [CompletionResult]::new('--include-default-paths', '--include-default-paths', [CompletionResultType]::ParameterName, 'include default paths in addition to the provided ones')
-            [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
-            [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
-            [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -761,6 +733,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -802,6 +775,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -851,6 +825,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -895,6 +870,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -939,6 +915,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -983,6 +960,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
@@ -1024,6 +1002,7 @@ Register-ArgumentCompleter -Native -CommandName 'x.py' -ScriptBlock {
             [CompletionResult]::new('--dry-run', '--dry-run', [CompletionResultType]::ParameterName, 'dry run; don''t build anything')
             [CompletionResult]::new('--dump-bootstrap-shims', '--dump-bootstrap-shims', [CompletionResultType]::ParameterName, 'Indicates whether to dump the work done from bootstrap shims')
             [CompletionResult]::new('--json-output', '--json-output', [CompletionResultType]::ParameterName, 'use message-format=json')
+            [CompletionResult]::new('--compile-time-deps', '--compile-time-deps', [CompletionResultType]::ParameterName, 'only build proc-macros and build scripts (for rust-analyzer)')
             [CompletionResult]::new('--bypass-bootstrap-lock', '--bypass-bootstrap-lock', [CompletionResultType]::ParameterName, 'Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)')
             [CompletionResult]::new('--llvm-profile-generate', '--llvm-profile-generate', [CompletionResultType]::ParameterName, 'generate PGO profile with llvm built for rustc')
             [CompletionResult]::new('--enable-bolt-settings', '--enable-bolt-settings', [CompletionResultType]::ParameterName, 'Enable BOLT link flags')
diff --git a/src/etc/completions/x.py.sh b/src/etc/completions/x.py.sh
index fe4ed5c915f..f31bdb58dc4 100644
--- a/src/etc/completions/x.py.sh
+++ b/src/etc/completions/x.py.sh
@@ -54,9 +54,6 @@ _x.py() {
             x.py,setup)
                 cmd="x.py__setup"
                 ;;
-            x.py,suggest)
-                cmd="x.py__suggest"
-                ;;
             x.py,test)
                 cmd="x.py__test"
                 ;;
@@ -85,7 +82,7 @@ _x.py() {
 
     case "${cmd}" in
         x.py)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]... build check clippy fix fmt doc test miri bench clean dist install run setup suggest vendor perf"
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]... build check clippy fix fmt doc test miri bench clean dist install run setup vendor perf"
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 1 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -271,7 +268,7 @@ _x.py() {
             return 0
             ;;
         x.py__bench)
-            opts="-v -i -j -h --test-args --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --test-args --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -461,7 +458,7 @@ _x.py() {
             return 0
             ;;
         x.py__build)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -647,7 +644,7 @@ _x.py() {
             return 0
             ;;
         x.py__check)
-            opts="-v -i -j -h --all-targets --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --all-targets --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -833,7 +830,7 @@ _x.py() {
             return 0
             ;;
         x.py__clean)
-            opts="-v -i -j -h --all --stage --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --all --stage --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1016,7 +1013,7 @@ _x.py() {
             return 0
             ;;
         x.py__clippy)
-            opts="-A -D -W -F -v -i -j -h --fix --allow-dirty --allow-staged --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-A -D -W -F -v -i -j -h --fix --allow-dirty --allow-staged --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1218,7 +1215,7 @@ _x.py() {
             return 0
             ;;
         x.py__dist)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1404,7 +1401,7 @@ _x.py() {
             return 0
             ;;
         x.py__doc)
-            opts="-v -i -j -h --open --json --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --open --json --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1590,7 +1587,7 @@ _x.py() {
             return 0
             ;;
         x.py__fix)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1776,7 +1773,7 @@ _x.py() {
             return 0
             ;;
         x.py__fmt)
-            opts="-v -i -j -h --check --all --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --check --all --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1962,7 +1959,7 @@ _x.py() {
             return 0
             ;;
         x.py__install)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -2148,7 +2145,7 @@ _x.py() {
             return 0
             ;;
         x.py__miri)
-            opts="-v -i -j -h --no-fail-fast --test-args --no-doc --doc --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --no-fail-fast --test-args --no-doc --doc --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -2338,7 +2335,7 @@ _x.py() {
             return 0
             ;;
         x.py__perf)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]... eprintln samply cachegrind benchmark compare"
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]... eprintln samply cachegrind benchmark compare"
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -2524,7 +2521,7 @@ _x.py() {
             return 0
             ;;
         x.py__perf__benchmark)
-            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help <benchmark-id> [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help <benchmark-id> [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -2722,7 +2719,7 @@ _x.py() {
             return 0
             ;;
         x.py__perf__cachegrind)
-            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -2920,7 +2917,7 @@ _x.py() {
             return 0
             ;;
         x.py__perf__compare)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help <BASE> <MODIFIED> [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help <BASE> <MODIFIED> [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -3106,7 +3103,7 @@ _x.py() {
             return 0
             ;;
         x.py__perf__eprintln)
-            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -3304,7 +3301,7 @@ _x.py() {
             return 0
             ;;
         x.py__perf__samply)
-            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -3502,7 +3499,7 @@ _x.py() {
             return 0
             ;;
         x.py__run)
-            opts="-v -i -j -h --args --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --args --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -3692,193 +3689,7 @@ _x.py() {
             return 0
             ;;
         x.py__setup)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [<PROFILE>|hook|editor|link] [PATHS]... [ARGS]..."
-            if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
-                COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
-                return 0
-            fi
-            case "${prev}" in
-                --config)
-                    local oldifs
-                    if [ -n "${IFS+x}" ]; then
-                        oldifs="$IFS"
-                    fi
-                    IFS=$'\n'
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    if [ -n "${oldifs+x}" ]; then
-                        IFS="$oldifs"
-                    fi
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o filenames
-                    fi
-                    return 0
-                    ;;
-                --build-dir)
-                    COMPREPLY=()
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o plusdirs
-                    fi
-                    return 0
-                    ;;
-                --build)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --host)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --target)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --exclude)
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    return 0
-                    ;;
-                --skip)
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    return 0
-                    ;;
-                --rustc-error-format)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --on-fail)
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    return 0
-                    ;;
-                --stage)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --keep-stage)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --keep-stage-std)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --src)
-                    COMPREPLY=()
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o plusdirs
-                    fi
-                    return 0
-                    ;;
-                --jobs)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                -j)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --warnings)
-                    COMPREPLY=($(compgen -W "deny warn default" -- "${cur}"))
-                    return 0
-                    ;;
-                --color)
-                    COMPREPLY=($(compgen -W "always never auto" -- "${cur}"))
-                    return 0
-                    ;;
-                --rust-profile-generate)
-                    local oldifs
-                    if [ -n "${IFS+x}" ]; then
-                        oldifs="$IFS"
-                    fi
-                    IFS=$'\n'
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    if [ -n "${oldifs+x}" ]; then
-                        IFS="$oldifs"
-                    fi
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o filenames
-                    fi
-                    return 0
-                    ;;
-                --rust-profile-use)
-                    local oldifs
-                    if [ -n "${IFS+x}" ]; then
-                        oldifs="$IFS"
-                    fi
-                    IFS=$'\n'
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    if [ -n "${oldifs+x}" ]; then
-                        IFS="$oldifs"
-                    fi
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o filenames
-                    fi
-                    return 0
-                    ;;
-                --llvm-profile-use)
-                    local oldifs
-                    if [ -n "${IFS+x}" ]; then
-                        oldifs="$IFS"
-                    fi
-                    IFS=$'\n'
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    if [ -n "${oldifs+x}" ]; then
-                        IFS="$oldifs"
-                    fi
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o filenames
-                    fi
-                    return 0
-                    ;;
-                --reproducible-artifact)
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    return 0
-                    ;;
-                --set)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --ci)
-                    COMPREPLY=($(compgen -W "true false" -- "${cur}"))
-                    return 0
-                    ;;
-                *)
-                    COMPREPLY=()
-                    ;;
-            esac
-            COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
-            return 0
-            ;;
-        x.py__suggest)
-            opts="-v -i -j -h --run --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [<PROFILE>|hook|editor|link] [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -4064,7 +3875,7 @@ _x.py() {
             return 0
             ;;
         x.py__test)
-            opts="-v -i -j -h --no-fail-fast --test-args --compiletest-rustc-args --no-doc --doc --bless --extra-checks --force-rerun --only-modified --compare-mode --pass --run --rustfix-coverage --no-capture --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --no-fail-fast --test-args --compiletest-rustc-args --no-doc --doc --bless --extra-checks --force-rerun --only-modified --compare-mode --pass --run --rustfix-coverage --no-capture --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -4274,7 +4085,7 @@ _x.py() {
             return 0
             ;;
         x.py__vendor)
-            opts="-v -i -j -h --sync --versioned-dirs --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --sync --versioned-dirs --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
diff --git a/src/etc/completions/x.py.zsh b/src/etc/completions/x.py.zsh
index 8fc4f052252..32e986ad141 100644
--- a/src/etc/completions/x.py.zsh
+++ b/src/etc/completions/x.py.zsh
@@ -46,6 +46,7 @@ _x.py() {
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -97,6 +98,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -141,6 +143,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -191,6 +194,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -234,6 +238,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -279,6 +284,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -324,6 +330,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -338,7 +345,7 @@ _arguments "${_arguments_options[@]}" : \
 _arguments "${_arguments_options[@]}" : \
 '*--test-args=[extra arguments to be passed for the test tool being used (e.g. libtest, compiletest or rustdoc)]:ARGS:_default' \
 '*--compiletest-rustc-args=[extra options to pass the compiler when running compiletest tests]:ARGS:_default' \
-'--extra-checks=[comma-separated list of other files types to check (accepts py, py\:lint, py\:fmt, shell, shell\:lint, cpp, cpp\:fmt, spellcheck, spellcheck\:fix)]:EXTRA_CHECKS:_default' \
+'--extra-checks=[comma-separated list of other files types to check (accepts py, py\:lint, py\:fmt, shell, cpp, cpp\:fmt, js, js\:lint, js\:typecheck, spellcheck)]:EXTRA_CHECKS:_default' \
 '--compare-mode=[mode describing what file the actual ui output will be compared to]:COMPARE MODE:_default' \
 '--pass=[force {check,build,run}-pass tests to this mode]:check | build | run:_default' \
 '--run=[whether to execute run-* tests]:auto | always | never:_default' \
@@ -381,6 +388,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -428,6 +436,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -472,6 +481,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -516,6 +526,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -559,6 +570,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -602,6 +614,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -646,6 +659,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -689,6 +703,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -700,50 +715,6 @@ _arguments "${_arguments_options[@]}" : \
 '*::paths -- paths for the subcommand:_files' \
 && ret=0
 ;;
-(suggest)
-_arguments "${_arguments_options[@]}" : \
-'--config=[TOML configuration file for build]:FILE:_files' \
-'--build-dir=[Build directory, overrides \`build.build-dir\` in \`bootstrap.toml\`]:DIR:_files -/' \
-'--build=[host target of the stage0 compiler]:BUILD:' \
-'--host=[host targets to build]:HOST:' \
-'--target=[target targets to build]:TARGET:' \
-'*--exclude=[build paths to exclude]:PATH:_files' \
-'*--skip=[build paths to skip]:PATH:_files' \
-'--rustc-error-format=[rustc error format]:RUSTC_ERROR_FORMAT:' \
-'--on-fail=[command to run on failure]:CMD:_cmdstring' \
-'--stage=[stage to build (indicates compiler to use/test, e.g., stage 0 uses the bootstrap compiler, stage 1 the stage 0 rustc artifacts, etc.)]:N:' \
-'*--keep-stage=[stage(s) to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)]:N:' \
-'*--keep-stage-std=[stage(s) of the standard library to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)]:N:' \
-'--src=[path to the root of the rust checkout]:DIR:_files -/' \
-'-j+[number of jobs to run in parallel]:JOBS:' \
-'--jobs=[number of jobs to run in parallel]:JOBS:' \
-'--warnings=[if value is deny, will deny warnings if value is warn, will emit warnings otherwise, use the default configured behaviour]:deny|warn:(deny warn default)' \
-'--color=[whether to use color in cargo and rustc output]:STYLE:(always never auto)' \
-'--rust-profile-generate=[generate PGO profile with rustc build]:PROFILE:_files' \
-'--rust-profile-use=[use PGO profile for rustc build]:PROFILE:_files' \
-'--llvm-profile-use=[use PGO profile for LLVM build]:PROFILE:_files' \
-'*--reproducible-artifact=[Additional reproducible artifacts that should be added to the reproducible artifacts archive]:REPRODUCIBLE_ARTIFACT:_default' \
-'*--set=[override options in bootstrap.toml]:section.option=value:' \
-'--ci=[Make bootstrap to behave as it'\''s running on the CI environment or not]:bool:(true false)' \
-'--run[run suggested tests]' \
-'*-v[use verbose output (-vv for very verbose)]' \
-'*--verbose[use verbose output (-vv for very verbose)]' \
-'-i[use incremental compilation]' \
-'--incremental[use incremental compilation]' \
-'--include-default-paths[include default paths in addition to the provided ones]' \
-'--dry-run[dry run; don'\''t build anything]' \
-'--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
-'--json-output[use message-format=json]' \
-'--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
-'--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
-'--enable-bolt-settings[Enable BOLT link flags]' \
-'--skip-stage0-validation[Skip stage0 compiler validation]' \
-'--skip-std-check-if-no-download-rustc[Skip checking the standard library if \`rust.download-rustc\` isn'\''t available. This is mostly for RA as building the stage1 compiler to check the library tree on each code change might be too much for some computers]' \
-'-h[Print help (see more with '\''--help'\'')]' \
-'--help[Print help (see more with '\''--help'\'')]' \
-'*::paths -- paths for the subcommand:_files' \
-&& ret=0
-;;
 (vendor)
 _arguments "${_arguments_options[@]}" : \
 '*--sync=[Additional \`Cargo.toml\` to sync and vendor]:SYNC:_files' \
@@ -779,6 +750,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -822,6 +794,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -877,6 +850,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -923,6 +897,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -969,6 +944,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -1015,6 +991,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -1059,6 +1036,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -1097,7 +1075,6 @@ _x.py_commands() {
 'install:Install distribution artifacts' \
 'run:Run tools contained in this repository' \
 'setup:Set up the environment for development' \
-'suggest:Suggest a subset of tests to run, based on modified files' \
 'vendor:Vendor dependencies' \
 'perf:Perform profiling and benchmarking of the compiler using \`rustc-perf\`' \
     )
@@ -1204,11 +1181,6 @@ _x.py__setup_commands() {
     local commands; commands=()
     _describe -t commands 'x.py setup commands' commands "$@"
 }
-(( $+functions[_x.py__suggest_commands] )) ||
-_x.py__suggest_commands() {
-    local commands; commands=()
-    _describe -t commands 'x.py suggest commands' commands "$@"
-}
 (( $+functions[_x.py__test_commands] )) ||
 _x.py__test_commands() {
     local commands; commands=()
diff --git a/src/etc/completions/x.sh b/src/etc/completions/x.sh
index 105fc668e8e..927d8f7661c 100644
--- a/src/etc/completions/x.sh
+++ b/src/etc/completions/x.sh
@@ -54,9 +54,6 @@ _x() {
             x,setup)
                 cmd="x__setup"
                 ;;
-            x,suggest)
-                cmd="x__suggest"
-                ;;
             x,test)
                 cmd="x__test"
                 ;;
@@ -85,7 +82,7 @@ _x() {
 
     case "${cmd}" in
         x)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]... build check clippy fix fmt doc test miri bench clean dist install run setup suggest vendor perf"
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]... build check clippy fix fmt doc test miri bench clean dist install run setup vendor perf"
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 1 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -271,7 +268,7 @@ _x() {
             return 0
             ;;
         x__bench)
-            opts="-v -i -j -h --test-args --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --test-args --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -461,7 +458,7 @@ _x() {
             return 0
             ;;
         x__build)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -647,7 +644,7 @@ _x() {
             return 0
             ;;
         x__check)
-            opts="-v -i -j -h --all-targets --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --all-targets --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -833,7 +830,7 @@ _x() {
             return 0
             ;;
         x__clean)
-            opts="-v -i -j -h --all --stage --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --all --stage --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1016,7 +1013,7 @@ _x() {
             return 0
             ;;
         x__clippy)
-            opts="-A -D -W -F -v -i -j -h --fix --allow-dirty --allow-staged --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-A -D -W -F -v -i -j -h --fix --allow-dirty --allow-staged --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1218,7 +1215,7 @@ _x() {
             return 0
             ;;
         x__dist)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1404,7 +1401,7 @@ _x() {
             return 0
             ;;
         x__doc)
-            opts="-v -i -j -h --open --json --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --open --json --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1590,7 +1587,7 @@ _x() {
             return 0
             ;;
         x__fix)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1776,7 +1773,7 @@ _x() {
             return 0
             ;;
         x__fmt)
-            opts="-v -i -j -h --check --all --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --check --all --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -1962,7 +1959,7 @@ _x() {
             return 0
             ;;
         x__install)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -2148,7 +2145,7 @@ _x() {
             return 0
             ;;
         x__miri)
-            opts="-v -i -j -h --no-fail-fast --test-args --no-doc --doc --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --no-fail-fast --test-args --no-doc --doc --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -2338,7 +2335,7 @@ _x() {
             return 0
             ;;
         x__perf)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]... eprintln samply cachegrind benchmark compare"
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]... eprintln samply cachegrind benchmark compare"
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -2524,7 +2521,7 @@ _x() {
             return 0
             ;;
         x__perf__benchmark)
-            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help <benchmark-id> [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help <benchmark-id> [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -2722,7 +2719,7 @@ _x() {
             return 0
             ;;
         x__perf__cachegrind)
-            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -2920,7 +2917,7 @@ _x() {
             return 0
             ;;
         x__perf__compare)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help <BASE> <MODIFIED> [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help <BASE> <MODIFIED> [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -3106,7 +3103,7 @@ _x() {
             return 0
             ;;
         x__perf__eprintln)
-            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -3304,7 +3301,7 @@ _x() {
             return 0
             ;;
         x__perf__samply)
-            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --include --exclude --scenarios --profiles --verbose --incremental --config --build-dir --build --host --target --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 3 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -3502,7 +3499,7 @@ _x() {
             return 0
             ;;
         x__run)
-            opts="-v -i -j -h --args --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --args --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -3692,193 +3689,7 @@ _x() {
             return 0
             ;;
         x__setup)
-            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [<PROFILE>|hook|editor|link] [PATHS]... [ARGS]..."
-            if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
-                COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
-                return 0
-            fi
-            case "${prev}" in
-                --config)
-                    local oldifs
-                    if [ -n "${IFS+x}" ]; then
-                        oldifs="$IFS"
-                    fi
-                    IFS=$'\n'
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    if [ -n "${oldifs+x}" ]; then
-                        IFS="$oldifs"
-                    fi
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o filenames
-                    fi
-                    return 0
-                    ;;
-                --build-dir)
-                    COMPREPLY=()
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o plusdirs
-                    fi
-                    return 0
-                    ;;
-                --build)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --host)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --target)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --exclude)
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    return 0
-                    ;;
-                --skip)
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    return 0
-                    ;;
-                --rustc-error-format)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --on-fail)
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    return 0
-                    ;;
-                --stage)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --keep-stage)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --keep-stage-std)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --src)
-                    COMPREPLY=()
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o plusdirs
-                    fi
-                    return 0
-                    ;;
-                --jobs)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                -j)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --warnings)
-                    COMPREPLY=($(compgen -W "deny warn default" -- "${cur}"))
-                    return 0
-                    ;;
-                --color)
-                    COMPREPLY=($(compgen -W "always never auto" -- "${cur}"))
-                    return 0
-                    ;;
-                --rust-profile-generate)
-                    local oldifs
-                    if [ -n "${IFS+x}" ]; then
-                        oldifs="$IFS"
-                    fi
-                    IFS=$'\n'
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    if [ -n "${oldifs+x}" ]; then
-                        IFS="$oldifs"
-                    fi
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o filenames
-                    fi
-                    return 0
-                    ;;
-                --rust-profile-use)
-                    local oldifs
-                    if [ -n "${IFS+x}" ]; then
-                        oldifs="$IFS"
-                    fi
-                    IFS=$'\n'
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    if [ -n "${oldifs+x}" ]; then
-                        IFS="$oldifs"
-                    fi
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o filenames
-                    fi
-                    return 0
-                    ;;
-                --llvm-profile-use)
-                    local oldifs
-                    if [ -n "${IFS+x}" ]; then
-                        oldifs="$IFS"
-                    fi
-                    IFS=$'\n'
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    if [ -n "${oldifs+x}" ]; then
-                        IFS="$oldifs"
-                    fi
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o filenames
-                    fi
-                    return 0
-                    ;;
-                --reproducible-artifact)
-                    COMPREPLY=($(compgen -f "${cur}"))
-                    return 0
-                    ;;
-                --set)
-                    COMPREPLY=("${cur}")
-                    if [[ "${BASH_VERSINFO[0]}" -ge 4 ]]; then
-                        compopt -o nospace
-                    fi
-                    return 0
-                    ;;
-                --ci)
-                    COMPREPLY=($(compgen -W "true false" -- "${cur}"))
-                    return 0
-                    ;;
-                *)
-                    COMPREPLY=()
-                    ;;
-            esac
-            COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
-            return 0
-            ;;
-        x__suggest)
-            opts="-v -i -j -h --run --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [<PROFILE>|hook|editor|link] [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -4064,7 +3875,7 @@ _x() {
             return 0
             ;;
         x__test)
-            opts="-v -i -j -h --no-fail-fast --test-args --compiletest-rustc-args --no-doc --doc --bless --extra-checks --force-rerun --only-modified --compare-mode --pass --run --rustfix-coverage --no-capture --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --no-fail-fast --test-args --compiletest-rustc-args --no-doc --doc --bless --extra-checks --force-rerun --only-modified --compare-mode --pass --run --rustfix-coverage --no-capture --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -4274,7 +4085,7 @@ _x() {
             return 0
             ;;
         x__vendor)
-            opts="-v -i -j -h --sync --versioned-dirs --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
+            opts="-v -i -j -h --sync --versioned-dirs --verbose --incremental --config --build-dir --build --host --target --exclude --skip --include-default-paths --rustc-error-format --on-fail --dry-run --dump-bootstrap-shims --stage --keep-stage --keep-stage-std --src --jobs --warnings --json-output --compile-time-deps --color --bypass-bootstrap-lock --rust-profile-generate --rust-profile-use --llvm-profile-use --llvm-profile-generate --enable-bolt-settings --skip-stage0-validation --reproducible-artifact --set --ci --skip-std-check-if-no-download-rustc --help [PATHS]... [ARGS]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 2 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
diff --git a/src/etc/completions/x.zsh b/src/etc/completions/x.zsh
index c495e8318ba..65995553276 100644
--- a/src/etc/completions/x.zsh
+++ b/src/etc/completions/x.zsh
@@ -46,6 +46,7 @@ _x() {
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -97,6 +98,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -141,6 +143,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -191,6 +194,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -234,6 +238,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -279,6 +284,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -324,6 +330,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -338,7 +345,7 @@ _arguments "${_arguments_options[@]}" : \
 _arguments "${_arguments_options[@]}" : \
 '*--test-args=[extra arguments to be passed for the test tool being used (e.g. libtest, compiletest or rustdoc)]:ARGS:_default' \
 '*--compiletest-rustc-args=[extra options to pass the compiler when running compiletest tests]:ARGS:_default' \
-'--extra-checks=[comma-separated list of other files types to check (accepts py, py\:lint, py\:fmt, shell, shell\:lint, cpp, cpp\:fmt, spellcheck, spellcheck\:fix)]:EXTRA_CHECKS:_default' \
+'--extra-checks=[comma-separated list of other files types to check (accepts py, py\:lint, py\:fmt, shell, cpp, cpp\:fmt, js, js\:lint, js\:typecheck, spellcheck)]:EXTRA_CHECKS:_default' \
 '--compare-mode=[mode describing what file the actual ui output will be compared to]:COMPARE MODE:_default' \
 '--pass=[force {check,build,run}-pass tests to this mode]:check | build | run:_default' \
 '--run=[whether to execute run-* tests]:auto | always | never:_default' \
@@ -381,6 +388,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -428,6 +436,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -472,6 +481,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -516,6 +526,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -559,6 +570,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -602,6 +614,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -646,6 +659,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -689,6 +703,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -700,50 +715,6 @@ _arguments "${_arguments_options[@]}" : \
 '*::paths -- paths for the subcommand:_files' \
 && ret=0
 ;;
-(suggest)
-_arguments "${_arguments_options[@]}" : \
-'--config=[TOML configuration file for build]:FILE:_files' \
-'--build-dir=[Build directory, overrides \`build.build-dir\` in \`bootstrap.toml\`]:DIR:_files -/' \
-'--build=[host target of the stage0 compiler]:BUILD:' \
-'--host=[host targets to build]:HOST:' \
-'--target=[target targets to build]:TARGET:' \
-'*--exclude=[build paths to exclude]:PATH:_files' \
-'*--skip=[build paths to skip]:PATH:_files' \
-'--rustc-error-format=[rustc error format]:RUSTC_ERROR_FORMAT:' \
-'--on-fail=[command to run on failure]:CMD:_cmdstring' \
-'--stage=[stage to build (indicates compiler to use/test, e.g., stage 0 uses the bootstrap compiler, stage 1 the stage 0 rustc artifacts, etc.)]:N:' \
-'*--keep-stage=[stage(s) to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)]:N:' \
-'*--keep-stage-std=[stage(s) of the standard library to keep without recompiling (pass multiple times to keep e.g., both stages 0 and 1)]:N:' \
-'--src=[path to the root of the rust checkout]:DIR:_files -/' \
-'-j+[number of jobs to run in parallel]:JOBS:' \
-'--jobs=[number of jobs to run in parallel]:JOBS:' \
-'--warnings=[if value is deny, will deny warnings if value is warn, will emit warnings otherwise, use the default configured behaviour]:deny|warn:(deny warn default)' \
-'--color=[whether to use color in cargo and rustc output]:STYLE:(always never auto)' \
-'--rust-profile-generate=[generate PGO profile with rustc build]:PROFILE:_files' \
-'--rust-profile-use=[use PGO profile for rustc build]:PROFILE:_files' \
-'--llvm-profile-use=[use PGO profile for LLVM build]:PROFILE:_files' \
-'*--reproducible-artifact=[Additional reproducible artifacts that should be added to the reproducible artifacts archive]:REPRODUCIBLE_ARTIFACT:_default' \
-'*--set=[override options in bootstrap.toml]:section.option=value:' \
-'--ci=[Make bootstrap to behave as it'\''s running on the CI environment or not]:bool:(true false)' \
-'--run[run suggested tests]' \
-'*-v[use verbose output (-vv for very verbose)]' \
-'*--verbose[use verbose output (-vv for very verbose)]' \
-'-i[use incremental compilation]' \
-'--incremental[use incremental compilation]' \
-'--include-default-paths[include default paths in addition to the provided ones]' \
-'--dry-run[dry run; don'\''t build anything]' \
-'--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
-'--json-output[use message-format=json]' \
-'--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
-'--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
-'--enable-bolt-settings[Enable BOLT link flags]' \
-'--skip-stage0-validation[Skip stage0 compiler validation]' \
-'--skip-std-check-if-no-download-rustc[Skip checking the standard library if \`rust.download-rustc\` isn'\''t available. This is mostly for RA as building the stage1 compiler to check the library tree on each code change might be too much for some computers]' \
-'-h[Print help (see more with '\''--help'\'')]' \
-'--help[Print help (see more with '\''--help'\'')]' \
-'*::paths -- paths for the subcommand:_files' \
-&& ret=0
-;;
 (vendor)
 _arguments "${_arguments_options[@]}" : \
 '*--sync=[Additional \`Cargo.toml\` to sync and vendor]:SYNC:_files' \
@@ -779,6 +750,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -822,6 +794,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -877,6 +850,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -923,6 +897,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -969,6 +944,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -1015,6 +991,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -1059,6 +1036,7 @@ _arguments "${_arguments_options[@]}" : \
 '--dry-run[dry run; don'\''t build anything]' \
 '--dump-bootstrap-shims[Indicates whether to dump the work done from bootstrap shims]' \
 '--json-output[use message-format=json]' \
+'--compile-time-deps[only build proc-macros and build scripts (for rust-analyzer)]' \
 '--bypass-bootstrap-lock[Bootstrap uses this value to decide whether it should bypass locking the build process. This is rarely needed (e.g., compiling the std library for different targets in parallel)]' \
 '--llvm-profile-generate[generate PGO profile with llvm built for rustc]' \
 '--enable-bolt-settings[Enable BOLT link flags]' \
@@ -1097,7 +1075,6 @@ _x_commands() {
 'install:Install distribution artifacts' \
 'run:Run tools contained in this repository' \
 'setup:Set up the environment for development' \
-'suggest:Suggest a subset of tests to run, based on modified files' \
 'vendor:Vendor dependencies' \
 'perf:Perform profiling and benchmarking of the compiler using \`rustc-perf\`' \
     )
@@ -1204,11 +1181,6 @@ _x__setup_commands() {
     local commands; commands=()
     _describe -t commands 'x setup commands' commands "$@"
 }
-(( $+functions[_x__suggest_commands] )) ||
-_x__suggest_commands() {
-    local commands; commands=()
-    _describe -t commands 'x suggest commands' commands "$@"
-}
 (( $+functions[_x__test_commands] )) ||
 _x__test_commands() {
     local commands; commands=()
diff --git a/src/etc/htmldocck.py b/src/etc/htmldocck.py
index 1806e2be9bb..72975cc6206 100755
--- a/src/etc/htmldocck.py
+++ b/src/etc/htmldocck.py
@@ -147,48 +147,17 @@ def concat_multi_lines(f):
         print_err(lineno, line, "Trailing backslash at the end of the file")
 
 
-def get_known_directive_names():
-    def filter_line(line):
-        line = line.strip()
-        return line.startswith('"') and (line.endswith('",') or line.endswith('"'))
-
-    # Equivalent to `src/tools/compiletest/src/header.rs` constant of the same name.
-    with open(
-        os.path.join(
-            # We go back to `src`.
-            os.path.dirname(os.path.dirname(__file__)),
-            "tools/compiletest/src/directive-list.rs",
-        ),
-        "r",
-        encoding="utf8",
-    ) as fd:
-        content = fd.read()
-        return [
-            line.strip().replace('",', "").replace('"', "")
-            for line in content.split("\n")
-            if filter_line(line)
-        ]
-
-
-# To prevent duplicating the list of commmands between `compiletest` and `htmldocck`, we put
-# it into a common file which is included in rust code and parsed here.
-# FIXME: This setup is temporary until we figure out how to improve this situation.
-#        See <https://github.com/rust-lang/rust/issues/125813#issuecomment-2141953780>.
-KNOWN_DIRECTIVE_NAMES = get_known_directive_names()
-
 LINE_PATTERN = re.compile(
     r"""
     //@\s+
-    (?P<negated>!?)(?P<cmd>[A-Za-z0-9]+(?:-[A-Za-z0-9]+)*)
-    (?P<args>.*)$
+    (?P<negated>!?)(?P<cmd>.+?)
+    (?:[\s:](?P<args>.*))?$
 """,
     re.X | re.UNICODE,
 )
 
 DEPRECATED_LINE_PATTERN = re.compile(
-    r"""
-    //\s+@
-""",
+    r"//\s+@",
     re.X | re.UNICODE,
 )
 
@@ -209,12 +178,7 @@ def get_commands(template):
 
             cmd = m.group("cmd")
             negated = m.group("negated") == "!"
-            if not negated and cmd in KNOWN_DIRECTIVE_NAMES:
-                continue
-            args = m.group("args")
-            if args and not args[:1].isspace():
-                print_err(lineno, line, "Invalid template syntax")
-                continue
+            args = m.group("args") or ""
             try:
                 args = shlex.split(args)
             except UnicodeEncodeError:
@@ -564,10 +528,14 @@ def check_command(c, cache):
             # hasraw/matchesraw <path> <pat> = string test
             elif len(c.args) == 2 and "raw" in c.cmd:
                 cerr = "`PATTERN` did not match"
+                if c.negated:
+                    cerr = "`PATTERN` unexpectedly matched"
                 ret = check_string(cache.get_file(c.args[0]), c.args[1], regexp)
             # has/matches <path> <pat> <match> = XML tree test
             elif len(c.args) == 3 and "raw" not in c.cmd:
                 cerr = "`XPATH PATTERN` did not match"
+                if c.negated:
+                    cerr = "`XPATH PATTERN` unexpectedly matched"
                 ret = get_nb_matching_elements(cache, c, regexp, True) != 0
             else:
                 raise InvalidCheck("Invalid number of {} arguments".format(c.cmd))
@@ -632,14 +600,11 @@ def check_command(c, cache):
             else:
                 raise InvalidCheck("Invalid number of {} arguments".format(c.cmd))
 
-        elif c.cmd == "valid-html":
-            raise InvalidCheck("Unimplemented valid-html")
-
-        elif c.cmd == "valid-links":
-            raise InvalidCheck("Unimplemented valid-links")
-
         else:
-            raise InvalidCheck("Unrecognized {}".format(c.cmd))
+            # Ignore unknown directives as they might be compiletest directives
+            # since they share the same `//@` prefix by convention. In any case,
+            # compiletest rejects unknown directives for us.
+            return
 
         if ret == c.negated:
             raise FailedCheck(cerr)
diff --git a/src/etc/rust_analyzer_eglot.el b/src/etc/rust_analyzer_eglot.el
index 3cb229cd98c..3151cb1a6e7 100644
--- a/src/etc/rust_analyzer_eglot.el
+++ b/src/etc/rust_analyzer_eglot.el
@@ -23,7 +23,8 @@
                                                   :overrideCommand ["python3"
                                                                     "x.py"
                                                                     "check"
-                                                                    "--json-output"])
+                                                                    "--json-output"
+                                                                    "--compile-time-deps"])]
                                         :sysrootSrc "./library"
                                         :extraEnv (:RUSTC_BOOTSTRAP "1"))
                  :rustc ( :source "./Cargo.toml" )))))))
diff --git a/src/etc/rust_analyzer_helix.toml b/src/etc/rust_analyzer_helix.toml
index 1a6a14991ec..8c1782a1abc 100644
--- a/src/etc/rust_analyzer_helix.toml
+++ b/src/etc/rust_analyzer_helix.toml
@@ -59,4 +59,5 @@ overrideCommand = [
     "--json-output",
     "--build-dir",
     "build/rust-analyzer",
+    "--compile-time-deps"
 ]
diff --git a/src/etc/rust_analyzer_settings.json b/src/etc/rust_analyzer_settings.json
index a960cc01732..b31169857c5 100644
--- a/src/etc/rust_analyzer_settings.json
+++ b/src/etc/rust_analyzer_settings.json
@@ -27,7 +27,8 @@
         "python3",
         "x.py",
         "check",
-        "--json-output"
+        "--json-output",
+        "--compile-time-deps"
     ],
     "rust-analyzer.cargo.sysrootSrc": "./library",
     "rust-analyzer.rustc.source": "./Cargo.toml",
diff --git a/src/etc/rust_analyzer_zed.json b/src/etc/rust_analyzer_zed.json
index 27fc524e9b5..7eace92500e 100644
--- a/src/etc/rust_analyzer_zed.json
+++ b/src/etc/rust_analyzer_zed.json
@@ -7,7 +7,7 @@
             "enable": true,
             "invocationLocation": "root",
             "invocationStrategy": "once",
-            "overrideCommand": ["python3", "x.py", "check", "--json-output"]
+            "overrideCommand": ["python3", "x.py", "check", "--json-output", "--compile-time-deps"]
           },
           "extraEnv": {
             "RUSTC_BOOTSTRAP": "1"
diff --git a/src/librustdoc/clean/inline.rs b/src/librustdoc/clean/inline.rs
index 96199cb972a..9603399f235 100644
--- a/src/librustdoc/clean/inline.rs
+++ b/src/librustdoc/clean/inline.rs
@@ -152,8 +152,14 @@ pub(crate) fn try_inline(
     };
 
     cx.inlined.insert(did.into());
-    let mut item =
-        crate::clean::generate_item_with_correct_attrs(cx, kind, did, name, import_def_id, None);
+    let mut item = crate::clean::generate_item_with_correct_attrs(
+        cx,
+        kind,
+        did,
+        name,
+        import_def_id.as_slice(),
+        None,
+    );
     // The visibility needs to reflect the one from the reexport and not from the "source" DefId.
     item.inner.inline_stmt_id = import_def_id;
     ret.push(item);
@@ -493,7 +499,7 @@ pub(crate) fn build_impl(
             impl_
                 .items
                 .iter()
-                .map(|item| tcx.hir_impl_item(item.id))
+                .map(|&item| tcx.hir_impl_item(item))
                 .filter(|item| {
                     // Filter out impl items whose corresponding trait item has `doc(hidden)`
                     // not to document such impl items.
diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs
index c2f3da18cd3..1265a39d27b 100644
--- a/src/librustdoc/clean/mod.rs
+++ b/src/librustdoc/clean/mod.rs
@@ -94,12 +94,12 @@ pub(crate) fn clean_doc_module<'tcx>(doc: &DocModule<'tcx>, cx: &mut DocContext<
     // This covers the case where somebody does an import which should pull in an item,
     // but there's already an item with the same namespace and same name. Rust gives
     // priority to the not-imported one, so we should, too.
-    items.extend(doc.items.values().flat_map(|(item, renamed, import_id)| {
+    items.extend(doc.items.values().flat_map(|(item, renamed, import_ids)| {
         // First, lower everything other than glob imports.
         if matches!(item.kind, hir::ItemKind::Use(_, hir::UseKind::Glob)) {
             return Vec::new();
         }
-        let v = clean_maybe_renamed_item(cx, item, *renamed, *import_id);
+        let v = clean_maybe_renamed_item(cx, item, *renamed, import_ids);
         for item in &v {
             if let Some(name) = item.name
                 && (cx.render_options.document_hidden || !item.is_doc_hidden())
@@ -162,7 +162,7 @@ pub(crate) fn clean_doc_module<'tcx>(doc: &DocModule<'tcx>, cx: &mut DocContext<
         kind,
         doc.def_id.to_def_id(),
         doc.name,
-        doc.import_id,
+        doc.import_id.as_slice(),
         doc.renamed,
     )
 }
@@ -182,22 +182,29 @@ fn generate_item_with_correct_attrs(
     kind: ItemKind,
     def_id: DefId,
     name: Symbol,
-    import_id: Option<LocalDefId>,
+    import_ids: &[LocalDefId],
     renamed: Option<Symbol>,
 ) -> Item {
     let target_attrs = inline::load_attrs(cx, def_id);
-    let attrs = if let Some(import_id) = import_id {
-        // glob reexports are treated the same as `#[doc(inline)]` items.
-        //
-        // For glob re-exports the item may or may not exist to be re-exported (potentially the cfgs
-        // on the path up until the glob can be removed, and only cfgs on the globbed item itself
-        // matter), for non-inlined re-exports see #85043.
-        let is_inline = hir_attr_lists(inline::load_attrs(cx, import_id.to_def_id()), sym::doc)
-            .get_word_attr(sym::inline)
-            .is_some()
-            || (is_glob_import(cx.tcx, import_id)
-                && (cx.render_options.document_hidden || !cx.tcx.is_doc_hidden(def_id)));
-        let mut attrs = get_all_import_attributes(cx, import_id, def_id, is_inline);
+    let attrs = if !import_ids.is_empty() {
+        let mut attrs = Vec::with_capacity(import_ids.len());
+        let mut is_inline = false;
+
+        for import_id in import_ids.iter().copied() {
+            // glob reexports are treated the same as `#[doc(inline)]` items.
+            //
+            // For glob re-exports the item may or may not exist to be re-exported (potentially the
+            // cfgs on the path up until the glob can be removed, and only cfgs on the globbed item
+            // itself matter), for non-inlined re-exports see #85043.
+            let import_is_inline =
+                hir_attr_lists(inline::load_attrs(cx, import_id.to_def_id()), sym::doc)
+                    .get_word_attr(sym::inline)
+                    .is_some()
+                    || (is_glob_import(cx.tcx, import_id)
+                        && (cx.render_options.document_hidden || !cx.tcx.is_doc_hidden(def_id)));
+            attrs.extend(get_all_import_attributes(cx, import_id, def_id, is_inline));
+            is_inline = is_inline || import_is_inline;
+        }
         add_without_unwanted_attributes(&mut attrs, target_attrs, is_inline, None);
         attrs
     } else {
@@ -216,7 +223,8 @@ fn generate_item_with_correct_attrs(
 
     let name = renamed.or(Some(name));
     let mut item = Item::from_def_id_and_attrs_and_parts(def_id, name, kind, attrs, cfg);
-    item.inner.inline_stmt_id = import_id;
+    // FIXME (GuillaumeGomez): Should we also make `inline_stmt_id` a `Vec` instead of an `Option`?
+    item.inner.inline_stmt_id = import_ids.first().copied();
     item
 }
 
@@ -382,7 +390,8 @@ pub(crate) fn clean_predicate<'tcx>(
         ty::ClauseKind::ConstEvaluatable(..)
         | ty::ClauseKind::WellFormed(..)
         | ty::ClauseKind::ConstArgHasType(..)
-        // FIXME(const_trait_impl): We can probably use this `HostEffect` pred to render `[const]`.
+        | ty::ClauseKind::UnstableFeature(..)
+        // FIXME(const_trait_impl): We can probably use this `HostEffect` pred to render `~const`.
         | ty::ClauseKind::HostEffect(_) => None,
     }
 }
@@ -2754,7 +2763,7 @@ fn clean_maybe_renamed_item<'tcx>(
     cx: &mut DocContext<'tcx>,
     item: &hir::Item<'tcx>,
     renamed: Option<Symbol>,
-    import_id: Option<LocalDefId>,
+    import_ids: &[LocalDefId],
 ) -> Vec<Item> {
     use hir::ItemKind;
     fn get_name(
@@ -2825,7 +2834,7 @@ fn clean_maybe_renamed_item<'tcx>(
                     })),
                     item.owner_id.def_id.to_def_id(),
                     name,
-                    import_id,
+                    import_ids,
                     renamed,
                 ));
                 return ret;
@@ -2856,10 +2865,10 @@ fn clean_maybe_renamed_item<'tcx>(
             ItemKind::Fn { ref sig, generics, body: body_id, .. } => {
                 clean_fn_or_proc_macro(item, sig, generics, body_id, &mut name, cx)
             }
-            ItemKind::Trait(_, _, _, generics, bounds, item_ids) => {
+            ItemKind::Trait(_, _, _, _, generics, bounds, item_ids) => {
                 let items = item_ids
                     .iter()
-                    .map(|ti| clean_trait_item(cx.tcx.hir_trait_item(ti.id), cx))
+                    .map(|&ti| clean_trait_item(cx.tcx.hir_trait_item(ti), cx))
                     .collect();
 
                 TraitItem(Box::new(Trait {
@@ -2880,7 +2889,7 @@ fn clean_maybe_renamed_item<'tcx>(
             kind,
             item.owner_id.def_id.to_def_id(),
             name,
-            import_id,
+            import_ids,
             renamed,
         )]
     })
@@ -2902,7 +2911,7 @@ fn clean_impl<'tcx>(
     let items = impl_
         .items
         .iter()
-        .map(|ii| clean_impl_item(tcx.hir_impl_item(ii.id), cx))
+        .map(|&ii| clean_impl_item(tcx.hir_impl_item(ii), cx))
         .collect::<Vec<_>>();
 
     // If this impl block is an implementation of the Deref trait, then we
@@ -3151,7 +3160,7 @@ fn clean_maybe_renamed_foreign_item<'tcx>(
             kind,
             item.owner_id.def_id.to_def_id(),
             item.ident.name,
-            import_id,
+            import_id.as_slice(),
             renamed,
         )
     })
diff --git a/src/librustdoc/clean/types.rs b/src/librustdoc/clean/types.rs
index a05aab22f1e..5ac5da24299 100644
--- a/src/librustdoc/clean/types.rs
+++ b/src/librustdoc/clean/types.rs
@@ -648,7 +648,7 @@ impl Item {
             let sig = tcx.fn_sig(def_id).skip_binder();
             let constness = if tcx.is_const_fn(def_id) {
                 // rustc's `is_const_fn` returns `true` for associated functions that have an `impl const` parent
-                // or that have a `#[const_trait]` parent. Do not display those as `const` in rustdoc because we
+                // or that have a `const trait` parent. Do not display those as `const` in rustdoc because we
                 // won't be printing correct syntax plus the syntax is unstable.
                 match tcx.opt_associated_item(def_id) {
                     Some(ty::AssocItem {
@@ -759,76 +759,48 @@ impl Item {
         Some(tcx.visibility(def_id))
     }
 
-    fn attributes_without_repr(&self, tcx: TyCtxt<'_>, is_json: bool) -> Vec<String> {
-        const ALLOWED_ATTRIBUTES: &[Symbol] =
-            &[sym::export_name, sym::link_section, sym::no_mangle, sym::non_exhaustive];
+    /// Get a list of attributes excluding `#[repr]` to display.
+    ///
+    /// Only used by the HTML output-format.
+    fn attributes_without_repr(&self) -> Vec<String> {
         self.attrs
             .other_attrs
             .iter()
-            .filter_map(|attr| {
-                if let hir::Attribute::Parsed(AttributeKind::LinkSection { name, .. }) = attr {
+            .filter_map(|attr| match attr {
+                hir::Attribute::Parsed(AttributeKind::LinkSection { name, .. }) => {
                     Some(format!("#[link_section = \"{name}\"]"))
                 }
-                // NoMangle is special cased, as it appears in HTML output, and we want to show it in source form, not HIR printing.
-                // It is also used by cargo-semver-checks.
-                else if let hir::Attribute::Parsed(AttributeKind::NoMangle(..)) = attr {
+                hir::Attribute::Parsed(AttributeKind::NoMangle(..)) => {
                     Some("#[no_mangle]".to_string())
-                } else if let hir::Attribute::Parsed(AttributeKind::ExportName { name, .. }) = attr
-                {
+                }
+                hir::Attribute::Parsed(AttributeKind::ExportName { name, .. }) => {
                     Some(format!("#[export_name = \"{name}\"]"))
-                } else if let hir::Attribute::Parsed(AttributeKind::NonExhaustive(..)) = attr {
+                }
+                hir::Attribute::Parsed(AttributeKind::NonExhaustive(..)) => {
                     Some("#[non_exhaustive]".to_string())
-                } else if is_json {
-                    match attr {
-                        // rustdoc-json stores this in `Item::deprecation`, so we
-                        // don't want it it `Item::attrs`.
-                        hir::Attribute::Parsed(AttributeKind::Deprecation { .. }) => None,
-                        // We have separate pretty-printing logic for `#[repr(..)]` attributes.
-                        hir::Attribute::Parsed(AttributeKind::Repr { .. }) => None,
-                        // target_feature is special-cased because cargo-semver-checks uses it
-                        hir::Attribute::Parsed(AttributeKind::TargetFeature(features, _)) => {
-                            let mut output = String::new();
-                            for (i, (feature, _)) in features.iter().enumerate() {
-                                if i != 0 {
-                                    output.push_str(", ");
-                                }
-                                output.push_str(&format!("enable=\"{}\"", feature.as_str()));
-                            }
-                            Some(format!("#[target_feature({output})]"))
-                        }
-                        _ => Some({
-                            let mut s = rustc_hir_pretty::attribute_to_string(&tcx, attr);
-                            assert_eq!(s.pop(), Some('\n'));
-                            s
-                        }),
-                    }
-                } else {
-                    if !attr.has_any_name(ALLOWED_ATTRIBUTES) {
-                        return None;
-                    }
-                    Some(
-                        rustc_hir_pretty::attribute_to_string(&tcx, attr)
-                            .replace("\\\n", "")
-                            .replace('\n', "")
-                            .replace("  ", " "),
-                    )
                 }
+                _ => None,
             })
             .collect()
     }
 
-    pub(crate) fn attributes(&self, tcx: TyCtxt<'_>, cache: &Cache, is_json: bool) -> Vec<String> {
-        let mut attrs = self.attributes_without_repr(tcx, is_json);
+    /// Get a list of attributes to display on this item.
+    ///
+    /// Only used by the HTML output-format.
+    pub(crate) fn attributes(&self, tcx: TyCtxt<'_>, cache: &Cache) -> Vec<String> {
+        let mut attrs = self.attributes_without_repr();
 
-        if let Some(repr_attr) = self.repr(tcx, cache, is_json) {
+        if let Some(repr_attr) = self.repr(tcx, cache) {
             attrs.push(repr_attr);
         }
         attrs
     }
 
     /// Returns a stringified `#[repr(...)]` attribute.
-    pub(crate) fn repr(&self, tcx: TyCtxt<'_>, cache: &Cache, is_json: bool) -> Option<String> {
-        repr_attributes(tcx, cache, self.def_id()?, self.type_(), is_json)
+    ///
+    /// Only used by the HTML output-format.
+    pub(crate) fn repr(&self, tcx: TyCtxt<'_>, cache: &Cache) -> Option<String> {
+        repr_attributes(tcx, cache, self.def_id()?, self.type_())
     }
 
     pub fn is_doc_hidden(&self) -> bool {
@@ -840,12 +812,14 @@ impl Item {
     }
 }
 
+/// Return a string representing the `#[repr]` attribute if present.
+///
+/// Only used by the HTML output-format.
 pub(crate) fn repr_attributes(
     tcx: TyCtxt<'_>,
     cache: &Cache,
     def_id: DefId,
     item_type: ItemType,
-    is_json: bool,
 ) -> Option<String> {
     use rustc_abi::IntegerType;
 
@@ -862,7 +836,6 @@ pub(crate) fn repr_attributes(
         // Render `repr(transparent)` iff the non-1-ZST field is public or at least one
         // field is public in case all fields are 1-ZST fields.
         let render_transparent = cache.document_private
-            || is_json
             || adt
                 .all_fields()
                 .find(|field| {
@@ -1704,7 +1677,7 @@ impl Type {
         }
     }
 
-    pub(crate) fn generics<'a>(&'a self) -> Option<impl Iterator<Item = &'a Type>> {
+    pub(crate) fn generics(&self) -> Option<impl Iterator<Item = &Type>> {
         match self {
             Type::Path { path, .. } => path.generics(),
             _ => None,
@@ -2254,7 +2227,7 @@ impl Path {
         self.segments.last().map(|seg| &seg.args)
     }
 
-    pub(crate) fn generics<'a>(&'a self) -> Option<impl Iterator<Item = &'a Type>> {
+    pub(crate) fn generics(&self) -> Option<impl Iterator<Item = &Type>> {
         self.segments.last().and_then(|seg| {
             if let GenericArgs::AngleBracketed { ref args, .. } = seg.args {
                 Some(args.iter().filter_map(|arg| match arg {
diff --git a/src/librustdoc/clean/utils.rs b/src/librustdoc/clean/utils.rs
index bf3f7607274..813fdee57e1 100644
--- a/src/librustdoc/clean/utils.rs
+++ b/src/librustdoc/clean/utils.rs
@@ -3,6 +3,7 @@ use std::fmt::{self, Display, Write as _};
 use std::sync::LazyLock as Lazy;
 use std::{ascii, mem};
 
+use rustc_ast::join_path_idents;
 use rustc_ast::tokenstream::TokenTree;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::def_id::{DefId, LOCAL_CRATE, LocalDefId};
@@ -24,7 +25,7 @@ use crate::clean::{
     clean_middle_ty, inline,
 };
 use crate::core::DocContext;
-use crate::display::{Joined as _, MaybeDisplay as _};
+use crate::display::Joined as _;
 
 #[cfg(test)]
 mod tests;
@@ -251,13 +252,7 @@ pub(crate) fn qpath_to_string(p: &hir::QPath<'_>) -> String {
         hir::QPath::LangItem(lang_item, ..) => return lang_item.name().to_string(),
     };
 
-    fmt::from_fn(|f| {
-        segments
-            .iter()
-            .map(|seg| (seg.ident.name != kw::PathRoot).then_some(seg.ident).maybe_display())
-            .joined("::", f)
-    })
-    .to_string()
+    join_path_idents(segments.iter().map(|seg| seg.ident))
 }
 
 pub(crate) fn build_deref_target_impls(
@@ -348,13 +343,11 @@ pub(crate) fn name_from_pat(p: &hir::Pat<'_>) -> Symbol {
 pub(crate) fn print_const(cx: &DocContext<'_>, n: ty::Const<'_>) -> String {
     match n.kind() {
         ty::ConstKind::Unevaluated(ty::UnevaluatedConst { def, args: _ }) => {
-            let s = if let Some(def) = def.as_local() {
+            if let Some(def) = def.as_local() {
                 rendered_const(cx.tcx, cx.tcx.hir_body_owned_by(def), def)
             } else {
                 inline::print_inlined_const(cx.tcx, def)
-            };
-
-            s
+            }
         }
         // array lengths are obviously usize
         ty::ConstKind::Value(cv) if *cv.ty.kind() == ty::Uint(ty::UintTy::Usize) => {
diff --git a/src/librustdoc/doctest.rs b/src/librustdoc/doctest.rs
index 9b4d2533954..38ba6b4503d 100644
--- a/src/librustdoc/doctest.rs
+++ b/src/librustdoc/doctest.rs
@@ -632,7 +632,7 @@ fn run_test(
         // the user to exploit nightly-only features on stable
         runner_compiler.env("RUSTC_BOOTSTRAP", "1");
         runner_compiler.args(compiler_args);
-        runner_compiler.args(&["--crate-type=bin", "-o"]).arg(&output_file);
+        runner_compiler.args(["--crate-type=bin", "-o"]).arg(&output_file);
         let mut extern_path = std::ffi::OsString::from(format!(
             "--extern=doctest_bundle_{edition}=",
             edition = doctest.edition
@@ -657,7 +657,7 @@ fn run_test(
         extern_path.push(&output_bundle_file);
         runner_compiler.arg(extern_path);
         runner_compiler.arg(&runner_input_file);
-        if std::fs::write(&runner_input_file, &merged_test_code).is_err() {
+        if std::fs::write(&runner_input_file, merged_test_code).is_err() {
             // If we cannot write this file for any reason, we leave. All combined tests will be
             // tested as standalone tests.
             return Err(TestFailure::CompileError);
diff --git a/src/librustdoc/doctest/rust.rs b/src/librustdoc/doctest/rust.rs
index 96975105ac5..f5ec828187a 100644
--- a/src/librustdoc/doctest/rust.rs
+++ b/src/librustdoc/doctest/rust.rs
@@ -140,7 +140,7 @@ impl HirCollector<'_> {
                 .iter()
                 .filter(|a| a.has_name(sym::attr))
                 .flat_map(|a| a.meta_item_list().unwrap_or_default())
-                .map(|i| pprust::meta_list_item_to_string(i))
+                .map(pprust::meta_list_item_to_string)
             {
                 // Add the additional attributes to the global_crate_attrs vector
                 self.collector.global_crate_attrs.push(attr);
diff --git a/src/librustdoc/formats/cache.rs b/src/librustdoc/formats/cache.rs
index 4989bd718c9..5191120ebdb 100644
--- a/src/librustdoc/formats/cache.rs
+++ b/src/librustdoc/formats/cache.rs
@@ -1,5 +1,6 @@
 use std::mem;
 
+use rustc_ast::join_path_syms;
 use rustc_attr_data_structures::StabilityLevel;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexMap, FxIndexSet};
 use rustc_hir::def_id::{CrateNum, DefId, DefIdMap, DefIdSet};
@@ -13,7 +14,6 @@ use crate::core::DocContext;
 use crate::fold::DocFolder;
 use crate::formats::Impl;
 use crate::formats::item_type::ItemType;
-use crate::html::format::join_with_double_colon;
 use crate::html::markdown::short_markdown_summary;
 use crate::html::render::IndexItem;
 use crate::html::render::search_index::get_function_type_for_search;
@@ -558,7 +558,7 @@ fn add_item_to_search_index(tcx: TyCtxt<'_>, cache: &mut Cache, item: &clean::It
         clean::ItemKind::ImportItem(import) => import.source.did.unwrap_or(item_def_id),
         _ => item_def_id,
     };
-    let path = join_with_double_colon(parent_path);
+    let path = join_path_syms(parent_path);
     let impl_id = if let Some(ParentStackItem::Impl { item_id, .. }) = cache.parent_stack.last() {
         item_id.as_def_id()
     } else {
diff --git a/src/librustdoc/formats/renderer.rs b/src/librustdoc/formats/renderer.rs
index 79ff1fa38c3..aa4be4db997 100644
--- a/src/librustdoc/formats/renderer.rs
+++ b/src/librustdoc/formats/renderer.rs
@@ -81,7 +81,7 @@ fn run_format_inner<'tcx, T: FormatRenderer<'tcx>>(
         let _timer =
             prof.generic_activity_with_arg("render_mod_item", item.name.unwrap().to_string());
 
-        cx.mod_item_in(&item)?;
+        cx.mod_item_in(item)?;
         let (clean::StrippedItem(box clean::ModuleItem(ref module))
         | clean::ModuleItem(ref module)) = item.inner.kind
         else {
@@ -99,7 +99,7 @@ fn run_format_inner<'tcx, T: FormatRenderer<'tcx>>(
     } else if let Some(item_name) = item.name
         && !item.is_extern_crate()
     {
-        prof.generic_activity_with_arg("render_item", item_name.as_str()).run(|| cx.item(&item))?;
+        prof.generic_activity_with_arg("render_item", item_name.as_str()).run(|| cx.item(item))?;
     }
     Ok(())
 }
diff --git a/src/librustdoc/html/format.rs b/src/librustdoc/html/format.rs
index bcb3e57c844..be8a2d511e9 100644
--- a/src/librustdoc/html/format.rs
+++ b/src/librustdoc/html/format.rs
@@ -14,6 +14,7 @@ use std::slice;
 
 use itertools::{Either, Itertools};
 use rustc_abi::ExternAbi;
+use rustc_ast::join_path_syms;
 use rustc_attr_data_structures::{ConstStability, StabilityLevel, StableSince};
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir as hir;
@@ -25,7 +26,7 @@ use rustc_span::symbol::kw;
 use rustc_span::{Symbol, sym};
 use tracing::{debug, trace};
 
-use super::url_parts_builder::{UrlPartsBuilder, estimate_item_path_byte_length};
+use super::url_parts_builder::UrlPartsBuilder;
 use crate::clean::types::ExternalLocation;
 use crate::clean::utils::find_nearest_parent_module;
 use crate::clean::{self, ExternalCrate, PrimitiveType};
@@ -113,9 +114,9 @@ impl clean::Generics {
             let real_params =
                 fmt::from_fn(|f| real_params.clone().map(|g| g.print(cx)).joined(", ", f));
             if f.alternate() {
-                write!(f, "<{:#}>", real_params)
+                write!(f, "<{real_params:#}>")
             } else {
-                write!(f, "&lt;{}&gt;", real_params)
+                write!(f, "&lt;{real_params}&gt;")
             }
         })
     }
@@ -369,18 +370,6 @@ pub(crate) enum HrefError {
     NotInExternalCache,
 }
 
-// Panics if `syms` is empty.
-pub(crate) fn join_with_double_colon(syms: &[Symbol]) -> String {
-    let mut s = String::with_capacity(estimate_item_path_byte_length(syms.len()));
-    // NOTE: using `Joined::joined` here causes a noticeable perf regression
-    s.push_str(syms[0].as_str());
-    for sym in &syms[1..] {
-        s.push_str("::");
-        s.push_str(sym.as_str());
-    }
-    s
-}
-
 /// This function is to get the external macro path because they are not in the cache used in
 /// `href_with_root_path`.
 fn generate_macro_def_id_path(
@@ -605,7 +594,7 @@ pub(crate) fn href_with_root_path(
             }
         }
     };
-    let url_parts = make_href(root_path, shortty, url_parts, &fqp, is_remote);
+    let url_parts = make_href(root_path, shortty, url_parts, fqp, is_remote);
     Ok((url_parts, shortty, fqp.clone()))
 }
 
@@ -672,7 +661,7 @@ pub(crate) fn link_tooltip(
             write!(f, "{}", cx.tcx().item_name(id))?;
         } else if !fqp.is_empty() {
             write!(f, "{shortty} ")?;
-            fqp.iter().joined("::", f)?;
+            write!(f, "{}", join_path_syms(fqp))?;
         }
         Ok(())
     })
@@ -703,7 +692,7 @@ fn resolved_path(
                     write!(
                         f,
                         "{path}::{anchor}",
-                        path = join_with_double_colon(&fqp[..fqp.len() - 1]),
+                        path = join_path_syms(&fqp[..fqp.len() - 1]),
                         anchor = print_anchor(did, *fqp.last().unwrap(), cx)
                     )
                 } else {
@@ -835,7 +824,7 @@ pub(crate) fn print_anchor(did: DefId, text: Symbol, cx: &Context<'_>) -> impl D
             write!(
                 f,
                 r#"<a class="{short_ty}" href="{url}" title="{short_ty} {path}">{text}</a>"#,
-                path = join_with_double_colon(&fqp),
+                path = join_path_syms(fqp),
                 text = EscapeBodyText(text.as_str()),
             )
         } else {
@@ -1095,7 +1084,7 @@ impl clean::QPathData {
                                     title=\"type {path}::{name}\">{name}</a>",
                         shortty = ItemType::AssocType,
                         name = assoc.name,
-                        path = join_with_double_colon(&path),
+                        path = join_path_syms(path),
                     )
                 } else {
                     write!(f, "{}", assoc.name)
@@ -1126,7 +1115,7 @@ impl clean::Impl {
                 {
                     let last = ty.last();
                     if f.alternate() {
-                        write!(f, "{}<", last)?;
+                        write!(f, "{last}<")?;
                         self.print_type(inner_type, f, use_absolute, cx)?;
                         write!(f, ">")?;
                     } else {
@@ -1230,7 +1219,7 @@ pub(crate) fn print_params(params: &[clean::Parameter], cx: &Context<'_>) -> imp
             .map(|param| {
                 fmt::from_fn(|f| {
                     if let Some(name) = param.name {
-                        write!(f, "{}: ", name)?;
+                        write!(f, "{name}: ")?;
                     }
                     param.type_.print(cx).fmt(f)
                 })
@@ -1352,7 +1341,7 @@ impl clean::FnDecl {
                     write!(f, "const ")?;
                 }
                 if let Some(name) = param.name {
-                    write!(f, "{}: ", name)?;
+                    write!(f, "{name}: ")?;
                 }
                 param.type_.print(cx).fmt(f)?;
             }
diff --git a/src/librustdoc/html/highlight.rs b/src/librustdoc/html/highlight.rs
index b2feee36c93..272180fb990 100644
--- a/src/librustdoc/html/highlight.rs
+++ b/src/librustdoc/html/highlight.rs
@@ -547,7 +547,7 @@ impl<'a> Iterator for TokenIter<'a> {
 fn get_real_ident_class(text: &str, allow_path_keywords: bool) -> Option<Class> {
     let ignore: &[&str] =
         if allow_path_keywords { &["self", "Self", "super", "crate"] } else { &["self", "Self"] };
-    if ignore.iter().any(|k| *k == text) {
+    if ignore.contains(&text) {
         return None;
     }
     Some(match text {
@@ -1159,7 +1159,7 @@ fn string_without_closing_tag<T: Display>(
         return Some("</a>");
     }
     if !open_tag {
-        write!(out, "{}", text_s).unwrap();
+        out.write_str(&text_s).unwrap();
         return None;
     }
     let klass_s = klass.as_html();
diff --git a/src/librustdoc/html/layout.rs b/src/librustdoc/html/layout.rs
index 50320cb231d..1f92c521d46 100644
--- a/src/librustdoc/html/layout.rs
+++ b/src/librustdoc/html/layout.rs
@@ -132,6 +132,5 @@ pub(crate) fn redirect(url: &str) -> String {
     <script>location.replace("{url}" + location.search + location.hash);</script>
 </body>
 </html>"##,
-        url = url,
     )
 }
diff --git a/src/librustdoc/html/markdown.rs b/src/librustdoc/html/markdown.rs
index e41435de29c..4addf2c3c96 100644
--- a/src/librustdoc/html/markdown.rs
+++ b/src/librustdoc/html/markdown.rs
@@ -251,7 +251,7 @@ impl<'a, I: Iterator<Item = Event<'a>>> Iterator for CodeBlocks<'_, 'a, I> {
                     if !parse_result.rust {
                         let added_classes = parse_result.added_classes;
                         let lang_string = if let Some(lang) = parse_result.unknown.first() {
-                            format!("language-{}", lang)
+                            format!("language-{lang}")
                         } else {
                             String::new()
                         };
@@ -999,7 +999,7 @@ impl<'a, 'tcx> TagIterator<'a, 'tcx> {
 
         if let Some((_, c)) = self.inner.next() {
             if c != '=' {
-                self.emit_error(format!("expected `=`, found `{}`", c));
+                self.emit_error(format!("expected `=`, found `{c}`"));
                 return None;
             }
         } else {
diff --git a/src/librustdoc/html/render/context.rs b/src/librustdoc/html/render/context.rs
index 3b4dae841ee..5ceb1fc988d 100644
--- a/src/librustdoc/html/render/context.rs
+++ b/src/librustdoc/html/render/context.rs
@@ -6,6 +6,7 @@ use std::path::{Path, PathBuf};
 use std::sync::mpsc::{Receiver, channel};
 
 use askama::Template;
+use rustc_ast::join_path_syms;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexMap, FxIndexSet};
 use rustc_hir::def_id::{DefIdMap, LOCAL_CRATE};
 use rustc_middle::ty::TyCtxt;
@@ -27,7 +28,6 @@ use crate::formats::FormatRenderer;
 use crate::formats::cache::Cache;
 use crate::formats::item_type::ItemType;
 use crate::html::escape::Escape;
-use crate::html::format::join_with_double_colon;
 use crate::html::markdown::{self, ErrorCodes, IdMap, plain_text_summary};
 use crate::html::render::write_shared::write_shared;
 use crate::html::url_parts_builder::UrlPartsBuilder;
@@ -193,14 +193,12 @@ impl<'tcx> Context<'tcx> {
         if it.is_stripped()
             && let Some(def_id) = it.def_id()
             && def_id.is_local()
+            && (self.info.is_inside_inlined_module
+                || self.shared.cache.inlined_items.contains(&def_id))
         {
-            if self.info.is_inside_inlined_module
-                || self.shared.cache.inlined_items.contains(&def_id)
-            {
-                // For now we're forced to generate a redirect page for stripped items until
-                // `record_extern_fqn` correctly points to external items.
-                render_redirect_pages = true;
-            }
+            // For now we're forced to generate a redirect page for stripped items until
+            // `record_extern_fqn` correctly points to external items.
+            render_redirect_pages = true;
         }
         let mut title = String::new();
         if !is_module {
@@ -211,7 +209,7 @@ impl<'tcx> Context<'tcx> {
                 title.push_str(" in ");
             }
             // No need to include the namespace for primitive types and keywords
-            title.push_str(&join_with_double_colon(&self.current));
+            title.push_str(&join_path_syms(&self.current));
         };
         title.push_str(" - Rust");
         let tyname = it.type_();
@@ -254,40 +252,36 @@ impl<'tcx> Context<'tcx> {
                 &self.shared.style_files,
             )
         } else {
-            if let Some(&(ref names, ty)) = self.cache().paths.get(&it.item_id.expect_def_id()) {
-                if self.current.len() + 1 != names.len()
-                    || self.current.iter().zip(names.iter()).any(|(a, b)| a != b)
-                {
-                    // We checked that the redirection isn't pointing to the current file,
-                    // preventing an infinite redirection loop in the generated
-                    // documentation.
-
-                    let path = fmt::from_fn(|f| {
-                        for name in &names[..names.len() - 1] {
-                            write!(f, "{name}/")?;
-                        }
-                        write!(f, "{}", print_item_path(ty, names.last().unwrap().as_str()))
-                    });
-                    match self.shared.redirections {
-                        Some(ref redirections) => {
-                            let mut current_path = String::new();
-                            for name in &self.current {
-                                current_path.push_str(name.as_str());
-                                current_path.push('/');
-                            }
-                            let _ = write!(
-                                current_path,
-                                "{}",
-                                print_item_path(ty, names.last().unwrap().as_str())
-                            );
-                            redirections.borrow_mut().insert(current_path, path.to_string());
-                        }
-                        None => {
-                            return layout::redirect(&format!(
-                                "{root}{path}",
-                                root = self.root_path()
-                            ));
+            if let Some(&(ref names, ty)) = self.cache().paths.get(&it.item_id.expect_def_id())
+                && (self.current.len() + 1 != names.len()
+                    || self.current.iter().zip(names.iter()).any(|(a, b)| a != b))
+            {
+                // We checked that the redirection isn't pointing to the current file,
+                // preventing an infinite redirection loop in the generated
+                // documentation.
+
+                let path = fmt::from_fn(|f| {
+                    for name in &names[..names.len() - 1] {
+                        write!(f, "{name}/")?;
+                    }
+                    write!(f, "{}", print_item_path(ty, names.last().unwrap().as_str()))
+                });
+                match self.shared.redirections {
+                    Some(ref redirections) => {
+                        let mut current_path = String::new();
+                        for name in &self.current {
+                            current_path.push_str(name.as_str());
+                            current_path.push('/');
                         }
+                        let _ = write!(
+                            current_path,
+                            "{}",
+                            print_item_path(ty, names.last().unwrap().as_str())
+                        );
+                        redirections.borrow_mut().insert(current_path, path.to_string());
+                    }
+                    None => {
+                        return layout::redirect(&format!("{root}{path}", root = self.root_path()));
                     }
                 }
             }
@@ -762,11 +756,7 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
         // Flush pending errors.
         self.shared.fs.close();
         let nb_errors = self.shared.errors.iter().map(|err| self.tcx().dcx().err(err)).count();
-        if nb_errors > 0 {
-            Err(Error::new(io::Error::new(io::ErrorKind::Other, "I/O error"), ""))
-        } else {
-            Ok(())
-        }
+        if nb_errors > 0 { Err(Error::new(io::Error::other("I/O error"), "")) } else { Ok(()) }
     }
 
     fn mod_item_in(&mut self, item: &clean::Item) -> Result<(), Error> {
@@ -842,7 +832,7 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             self.info.render_redirect_pages = item.is_stripped();
         }
 
-        let buf = self.render_item(&item, false);
+        let buf = self.render_item(item, false);
         // buf will be empty if the item is stripped and there is no redirect for it
         if !buf.is_empty() {
             let name = item.name.as_ref().unwrap();
@@ -853,7 +843,7 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             self.shared.fs.write(joint_dst, buf)?;
 
             if !self.info.render_redirect_pages {
-                self.shared.all.borrow_mut().append(full_path(self, &item), &item_type);
+                self.shared.all.borrow_mut().append(full_path(self, item), &item_type);
             }
             // If the item is a macro, redirect from the old macro URL (with !)
             // to the new one (without).
diff --git a/src/librustdoc/html/render/mod.rs b/src/librustdoc/html/render/mod.rs
index 6a1fad06ae3..872dbbcd19e 100644
--- a/src/librustdoc/html/render/mod.rs
+++ b/src/librustdoc/html/render/mod.rs
@@ -49,6 +49,7 @@ use std::{fs, str};
 
 use askama::Template;
 use itertools::Either;
+use rustc_ast::join_path_syms;
 use rustc_attr_data_structures::{
     ConstStability, DeprecatedSince, Deprecation, RustcVersion, StabilityLevel, StableSince,
 };
@@ -74,9 +75,9 @@ use crate::formats::cache::Cache;
 use crate::formats::item_type::ItemType;
 use crate::html::escape::Escape;
 use crate::html::format::{
-    Ending, HrefError, PrintWithSpace, href, join_with_double_colon, print_abi_with_space,
-    print_constness_with_space, print_default_space, print_generic_bounds, print_where_clause,
-    visibility_print_with_space, write_str,
+    Ending, HrefError, PrintWithSpace, href, print_abi_with_space, print_constness_with_space,
+    print_default_space, print_generic_bounds, print_where_clause, visibility_print_with_space,
+    write_str,
 };
 use crate::html::markdown::{
     HeadingOffset, IdMap, Markdown, MarkdownItemInfo, MarkdownSummaryLine,
@@ -980,7 +981,7 @@ fn assoc_method(
     let name = meth.name.as_ref().unwrap();
     let vis = visibility_print_with_space(meth, cx).to_string();
     let defaultness = print_default_space(meth.is_default());
-    // FIXME: Once https://github.com/rust-lang/rust/issues/67792 is implemented, we can remove
+    // FIXME: Once https://github.com/rust-lang/rust/issues/143874 is implemented, we can remove
     // this condition.
     let constness = match render_mode {
         RenderMode::Normal => print_constness_with_space(
@@ -1109,7 +1110,7 @@ fn since_to_string(since: &StableSince) -> Option<String> {
     match since {
         StableSince::Version(since) => Some(since.to_string()),
         StableSince::Current => Some(RustcVersion::CURRENT.to_string()),
-        StableSince::Err => None,
+        StableSince::Err(_) => None,
     }
 }
 
@@ -1191,7 +1192,7 @@ fn render_assoc_item(
 // a whitespace prefix and newline.
 fn render_attributes_in_pre(it: &clean::Item, prefix: &str, cx: &Context<'_>) -> impl fmt::Display {
     fmt::from_fn(move |f| {
-        for a in it.attributes(cx.tcx(), cx.cache(), false) {
+        for a in it.attributes(cx.tcx(), cx.cache()) {
             writeln!(f, "{prefix}{a}")?;
         }
         Ok(())
@@ -1207,7 +1208,7 @@ fn render_code_attribute(code_attr: CodeAttribute, w: &mut impl fmt::Write) {
 // When an attribute is rendered inside a <code> tag, it is formatted using
 // a div to produce a newline after it.
 fn render_attributes_in_code(w: &mut impl fmt::Write, it: &clean::Item, cx: &Context<'_>) {
-    for attr in it.attributes(cx.tcx(), cx.cache(), false) {
+    for attr in it.attributes(cx.tcx(), cx.cache()) {
         render_code_attribute(CodeAttribute(attr), w);
     }
 }
@@ -1219,7 +1220,7 @@ fn render_repr_attributes_in_code(
     def_id: DefId,
     item_type: ItemType,
 ) {
-    if let Some(repr) = clean::repr_attributes(cx.tcx(), cx.cache(), def_id, item_type, false) {
+    if let Some(repr) = clean::repr_attributes(cx.tcx(), cx.cache(), def_id, item_type) {
         render_code_attribute(CodeAttribute(repr), w);
     }
 }
@@ -1482,10 +1483,10 @@ fn render_deref_methods(
             }
         }
         render_assoc_items_inner(&mut w, cx, container_item, did, what, derefs);
-    } else if let Some(prim) = target.primitive_type() {
-        if let Some(&did) = cache.primitive_locations.get(&prim) {
-            render_assoc_items_inner(&mut w, cx, container_item, did, what, derefs);
-        }
+    } else if let Some(prim) = target.primitive_type()
+        && let Some(&did) = cache.primitive_locations.get(&prim)
+    {
+        render_assoc_items_inner(&mut w, cx, container_item, did, what, derefs);
     }
 }
 
@@ -2057,21 +2058,20 @@ fn render_impl(
         // default items which weren't overridden in the implementation block.
         // We don't emit documentation for default items if they appear in the
         // Implementations on Foreign Types or Implementors sections.
-        if rendering_params.show_default_items {
-            if let Some(t) = trait_
-                && !impl_.is_negative_trait_impl()
-            {
-                render_default_items(
-                    &mut default_impl_items,
-                    &mut impl_items,
-                    cx,
-                    t,
-                    impl_,
-                    &i.impl_item,
-                    render_mode,
-                    rendering_params,
-                )?;
-            }
+        if rendering_params.show_default_items
+            && let Some(t) = trait_
+            && !impl_.is_negative_trait_impl()
+        {
+            render_default_items(
+                &mut default_impl_items,
+                &mut impl_items,
+                cx,
+                t,
+                impl_,
+                &i.impl_item,
+                render_mode,
+                rendering_params,
+            )?;
         }
         if render_mode == RenderMode::Normal {
             let toggled = !(impl_items.is_empty() && default_impl_items.is_empty());
@@ -2152,7 +2152,7 @@ fn render_rightside(
     let tcx = cx.tcx();
 
     fmt::from_fn(move |w| {
-        // FIXME: Once https://github.com/rust-lang/rust/issues/67792 is implemented, we can remove
+        // FIXME: Once https://github.com/rust-lang/rust/issues/143874 is implemented, we can remove
         // this condition.
         let const_stability = match render_mode {
             RenderMode::Normal => item.const_stability(tcx),
@@ -2555,7 +2555,7 @@ fn collect_paths_for_type(first_ty: &clean::Type, cache: &Cache) -> Vec<String>
         let fqp = cache.exact_paths.get(&did).or_else(get_extern);
 
         if let Some(path) = fqp {
-            out.push(join_with_double_colon(path));
+            out.push(join_path_syms(path));
         }
     };
 
@@ -2569,7 +2569,7 @@ fn collect_paths_for_type(first_ty: &clean::Type, cache: &Cache) -> Vec<String>
         match ty {
             clean::Type::Path { path } => process_path(path.def_id()),
             clean::Type::Tuple(tys) => {
-                work.extend(tys.into_iter());
+                work.extend(tys.iter());
             }
             clean::Type::Slice(ty) => {
                 work.push_back(ty);
diff --git a/src/librustdoc/html/render/ordered_json.rs b/src/librustdoc/html/render/ordered_json.rs
index d1dddfebc83..be51dad1c2b 100644
--- a/src/librustdoc/html/render/ordered_json.rs
+++ b/src/librustdoc/html/render/ordered_json.rs
@@ -25,7 +25,7 @@ impl OrderedJson {
             .into_iter()
             .sorted_unstable_by(|a, b| a.borrow().cmp(b.borrow()))
             .format_with(",", |item, f| f(item.borrow()));
-        Self(format!("[{}]", items))
+        Self(format!("[{items}]"))
     }
 
     pub(crate) fn array_unsorted<T: Borrow<Self>, I: IntoIterator<Item = T>>(items: I) -> Self {
diff --git a/src/librustdoc/html/render/print_item.rs b/src/librustdoc/html/render/print_item.rs
index e33bdc0db32..02ee34aaac6 100644
--- a/src/librustdoc/html/render/print_item.rs
+++ b/src/librustdoc/html/render/print_item.rs
@@ -4,6 +4,7 @@ use std::iter;
 
 use askama::Template;
 use rustc_abi::VariantIdx;
+use rustc_ast::join_path_syms;
 use rustc_data_structures::fx::{FxHashMap, FxIndexSet};
 use rustc_hir as hir;
 use rustc_hir::def::CtorKind;
@@ -30,8 +31,8 @@ use crate::formats::Impl;
 use crate::formats::item_type::ItemType;
 use crate::html::escape::{Escape, EscapeBodyTextWithWbr};
 use crate::html::format::{
-    Ending, PrintWithSpace, join_with_double_colon, print_abi_with_space,
-    print_constness_with_space, print_where_clause, visibility_print_with_space,
+    Ending, PrintWithSpace, print_abi_with_space, print_constness_with_space, print_where_clause,
+    visibility_print_with_space,
 };
 use crate::html::markdown::{HeadingOffset, MarkdownSummaryLine};
 use crate::html::render::{document_full, document_item_info};
@@ -1424,7 +1425,7 @@ fn item_type_alias(cx: &Context<'_>, it: &clean::Item, t: &clean::TypeAlias) ->
                 iter::repeat_n("..", cx.current.len()).chain(iter::once("type.impl")).collect();
             js_src_path.extend(target_fqp[..target_fqp.len() - 1].iter().copied());
             js_src_path.push_fmt(format_args!("{target_type}.{}.js", target_fqp.last().unwrap()));
-            let self_path = fmt::from_fn(|f| self_fqp.iter().joined("::", f));
+            let self_path = join_path_syms(self_fqp);
             write!(
                 w,
                 "<script src=\"{src}\" data-self-path=\"{self_path}\" async></script>",
@@ -1450,7 +1451,7 @@ item_template!(
 
 impl<'a, 'cx: 'a> ItemUnion<'a, 'cx> {
     fn render_union(&self) -> impl Display {
-        render_union(self.it, Some(&self.generics), &self.fields, self.cx)
+        render_union(self.it, Some(self.generics), self.fields, self.cx)
     }
 
     fn document_field(&self, field: &'a clean::Item) -> impl Display {
@@ -1487,12 +1488,11 @@ impl<'a, 'cx: 'a> ItemUnion<'a, 'cx> {
                     self.cx.cache(),
                     self.def_id,
                     ItemType::Union,
-                    false,
                 ) {
                     writeln!(f, "{repr}")?;
                 };
             } else {
-                for a in self.it.attributes(self.cx.tcx(), self.cx.cache(), false) {
+                for a in self.it.attributes(self.cx.tcx(), self.cx.cache()) {
                     writeln!(f, "{a}")?;
                 }
             }
@@ -1982,16 +1982,14 @@ fn item_constant(
                 w.write_str(";")?;
             }
 
-            if !is_literal {
-                if let Some(value) = &value {
-                    let value_lowercase = value.to_lowercase();
-                    let expr_lowercase = expr.to_lowercase();
+            if !is_literal && let Some(value) = &value {
+                let value_lowercase = value.to_lowercase();
+                let expr_lowercase = expr.to_lowercase();
 
-                    if value_lowercase != expr_lowercase
-                        && value_lowercase.trim_end_matches("i32") != expr_lowercase
-                    {
-                        write!(w, " // {value}", value = Escape(value))?;
-                    }
+                if value_lowercase != expr_lowercase
+                    && value_lowercase.trim_end_matches("i32") != expr_lowercase
+                {
+                    write!(w, " // {value}", value = Escape(value))?;
                 }
             }
             Ok::<(), fmt::Error>(())
@@ -2071,41 +2069,39 @@ fn item_fields(
                 _ => None,
             })
             .peekable();
-        if let None | Some(CtorKind::Fn) = ctor_kind {
-            if fields.peek().is_some() {
-                let title = format!(
-                    "{}{}",
-                    if ctor_kind.is_none() { "Fields" } else { "Tuple Fields" },
-                    document_non_exhaustive_header(it),
-                );
+        if let None | Some(CtorKind::Fn) = ctor_kind
+            && fields.peek().is_some()
+        {
+            let title = format!(
+                "{}{}",
+                if ctor_kind.is_none() { "Fields" } else { "Tuple Fields" },
+                document_non_exhaustive_header(it),
+            );
+            write!(
+                w,
+                "{}",
+                write_section_heading(
+                    &title,
+                    "fields",
+                    Some("fields"),
+                    document_non_exhaustive(it)
+                )
+            )?;
+            for (index, (field, ty)) in fields.enumerate() {
+                let field_name =
+                    field.name.map_or_else(|| index.to_string(), |sym| sym.as_str().to_string());
+                let id = cx.derive_id(format!("{typ}.{field_name}", typ = ItemType::StructField));
                 write!(
                     w,
-                    "{}",
-                    write_section_heading(
-                        &title,
-                        "fields",
-                        Some("fields"),
-                        document_non_exhaustive(it)
-                    )
+                    "<span id=\"{id}\" class=\"{item_type} section-header\">\
+                        <a href=\"#{id}\" class=\"anchor field\">§</a>\
+                        <code>{field_name}: {ty}</code>\
+                    </span>\
+                    {doc}",
+                    item_type = ItemType::StructField,
+                    ty = ty.print(cx),
+                    doc = document(cx, field, Some(it), HeadingOffset::H3),
                 )?;
-                for (index, (field, ty)) in fields.enumerate() {
-                    let field_name = field
-                        .name
-                        .map_or_else(|| index.to_string(), |sym| sym.as_str().to_string());
-                    let id =
-                        cx.derive_id(format!("{typ}.{field_name}", typ = ItemType::StructField));
-                    write!(
-                        w,
-                        "<span id=\"{id}\" class=\"{item_type} section-header\">\
-                            <a href=\"#{id}\" class=\"anchor field\">§</a>\
-                            <code>{field_name}: {ty}</code>\
-                        </span>\
-                        {doc}",
-                        item_type = ItemType::StructField,
-                        ty = ty.print(cx),
-                        doc = document(cx, field, Some(it), HeadingOffset::H3),
-                    )?;
-                }
             }
         }
         Ok(())
@@ -2257,7 +2253,7 @@ pub(crate) fn compare_names(left: &str, right: &str) -> Ordering {
 }
 
 pub(super) fn full_path(cx: &Context<'_>, item: &clean::Item) -> String {
-    let mut s = join_with_double_colon(&cx.current);
+    let mut s = join_path_syms(&cx.current);
     s.push_str("::");
     s.push_str(item.name.unwrap().as_str());
     s
diff --git a/src/librustdoc/html/render/search_index.rs b/src/librustdoc/html/render/search_index.rs
index aff8684ee3a..3c9be29ccc3 100644
--- a/src/librustdoc/html/render/search_index.rs
+++ b/src/librustdoc/html/render/search_index.rs
@@ -4,6 +4,7 @@ use std::collections::hash_map::Entry;
 use std::collections::{BTreeMap, VecDeque};
 
 use encode::{bitmap_to_string, write_vlqhex_to_string};
+use rustc_ast::join_path_syms;
 use rustc_data_structures::fx::{FxHashMap, FxIndexMap};
 use rustc_middle::ty::TyCtxt;
 use rustc_span::def_id::DefId;
@@ -17,7 +18,6 @@ use crate::clean::types::{Function, Generics, ItemId, Type, WherePredicate};
 use crate::clean::{self, utils};
 use crate::formats::cache::{Cache, OrphanImplItem};
 use crate::formats::item_type::ItemType;
-use crate::html::format::join_with_double_colon;
 use crate::html::markdown::short_markdown_summary;
 use crate::html::render::ordered_json::OrderedJson;
 use crate::html::render::{self, IndexItem, IndexItemFunctionType, RenderType, RenderTypeId};
@@ -78,7 +78,7 @@ pub(crate) fn build_index(
                 ty: item.type_(),
                 defid: item.item_id.as_def_id(),
                 name: item.name.unwrap(),
-                path: join_with_double_colon(&fqp[..fqp.len() - 1]),
+                path: join_path_syms(&fqp[..fqp.len() - 1]),
                 desc,
                 parent: Some(parent),
                 parent_idx: None,
@@ -116,7 +116,7 @@ pub(crate) fn build_index(
     // Set up alias indexes.
     for (i, item) in cache.search_index.iter().enumerate() {
         for alias in &item.aliases[..] {
-            aliases.entry(alias.as_str().to_lowercase()).or_default().push(i);
+            aliases.entry(alias.to_string()).or_default().push(i);
         }
     }
 
@@ -416,7 +416,7 @@ pub(crate) fn build_index(
                             if fqp.len() < 2 {
                                 return None;
                             }
-                            join_with_double_colon(&fqp[..fqp.len() - 1])
+                            join_path_syms(&fqp[..fqp.len() - 1])
                         };
                     if path == item.path {
                         return None;
@@ -427,10 +427,10 @@ pub(crate) fn build_index(
                 let i = <isize as TryInto<usize>>::try_into(parent_idx).unwrap();
                 item.path = {
                     let p = &crate_paths[i].1;
-                    join_with_double_colon(&p[..p.len() - 1])
+                    join_path_syms(&p[..p.len() - 1])
                 };
                 item.exact_path =
-                    crate_paths[i].2.as_ref().map(|xp| join_with_double_colon(&xp[..xp.len() - 1]));
+                    crate_paths[i].2.as_ref().map(|xp| join_path_syms(&xp[..xp.len() - 1]));
             }
 
             // Omit the parent path if it is same to that of the prior item.
@@ -549,11 +549,11 @@ pub(crate) fn build_index(
                     });
                     continue;
                 }
-                let full_path = join_with_double_colon(&path[..path.len() - 1]);
+                let full_path = join_path_syms(&path[..path.len() - 1]);
                 let full_exact_path = exact
                     .as_ref()
                     .filter(|exact| exact.last() == path.last() && exact.len() >= 2)
-                    .map(|exact| join_with_double_colon(&exact[..exact.len() - 1]));
+                    .map(|exact| join_path_syms(&exact[..exact.len() - 1]));
                 let exact_path = extra_paths.len() + self.items.len();
                 let exact_path = full_exact_path.as_ref().map(|full_exact_path| match extra_paths
                     .entry(full_exact_path.clone())
diff --git a/src/librustdoc/html/render/sidebar.rs b/src/librustdoc/html/render/sidebar.rs
index 91540e06e33..b9f5ada417c 100644
--- a/src/librustdoc/html/render/sidebar.rs
+++ b/src/librustdoc/html/render/sidebar.rs
@@ -541,7 +541,7 @@ fn sidebar_deref_methods<'a>(
                 .iter()
                 .filter(|i| {
                     i.inner_impl().trait_.is_none()
-                        && real_target.is_doc_subtype_of(&i.inner_impl().for_, &c)
+                        && real_target.is_doc_subtype_of(&i.inner_impl().for_, c)
                 })
                 .flat_map(|i| get_methods(i.inner_impl(), true, used_links, deref_mut, cx.tcx()))
                 .collect::<Vec<_>>();
diff --git a/src/librustdoc/html/render/sorted_template.rs b/src/librustdoc/html/render/sorted_template.rs
index a7b954ab70b..659c5e6093b 100644
--- a/src/librustdoc/html/render/sorted_template.rs
+++ b/src/librustdoc/html/render/sorted_template.rs
@@ -63,7 +63,8 @@ impl<F: FileFormat> fmt::Display for SortedTemplate<F> {
         for (p, fragment) in self.fragments.iter().with_position() {
             let mut f = DeltaWriter { inner: &mut f, delta: 0 };
             let sep = if matches!(p, Position::First | Position::Only) { "" } else { F::SEPARATOR };
-            write!(f, "{}{}", sep, fragment)?;
+            f.write_str(sep)?;
+            f.write_str(fragment)?;
             fragment_lengths.push(f.delta);
         }
         let offset = Offset { start: self.before.len(), fragment_lengths };
diff --git a/src/librustdoc/html/render/write_shared.rs b/src/librustdoc/html/render/write_shared.rs
index 0078671fcc5..1f691392b17 100644
--- a/src/librustdoc/html/render/write_shared.rs
+++ b/src/librustdoc/html/render/write_shared.rs
@@ -26,6 +26,7 @@ use std::{fmt, fs};
 
 use indexmap::IndexMap;
 use regex::Regex;
+use rustc_ast::join_path_syms;
 use rustc_data_structures::flock;
 use rustc_data_structures::fx::{FxHashSet, FxIndexMap, FxIndexSet};
 use rustc_middle::ty::TyCtxt;
@@ -43,7 +44,6 @@ use crate::docfs::PathError;
 use crate::error::Error;
 use crate::formats::Impl;
 use crate::formats::item_type::ItemType;
-use crate::html::format::join_with_double_colon;
 use crate::html::layout;
 use crate::html::render::ordered_json::{EscapedJson, OrderedJson};
 use crate::html::render::search_index::{SerializedSearchIndex, build_index};
@@ -608,7 +608,7 @@ impl TypeAliasPart {
                     for &(type_alias_fqp, type_alias_item) in type_aliases {
                         cx.id_map.borrow_mut().clear();
                         cx.deref_id_map.borrow_mut().clear();
-                        let type_alias_fqp = join_with_double_colon(&type_alias_fqp);
+                        let type_alias_fqp = join_path_syms(type_alias_fqp);
                         if let Some(ret) = &mut ret {
                             ret.aliases.push(type_alias_fqp);
                         } else {
diff --git a/src/librustdoc/html/static/js/rustdoc.d.ts b/src/librustdoc/html/static/js/rustdoc.d.ts
index ca2512e5ab6..a9589764547 100644
--- a/src/librustdoc/html/static/js/rustdoc.d.ts
+++ b/src/librustdoc/html/static/js/rustdoc.d.ts
@@ -219,6 +219,8 @@ declare namespace rustdoc {
         crate: string,
         descShard: SearchDescShard,
         id: number,
+        // This is the name of the item. For doc aliases, if you want the name of the aliased
+        // item, take a look at `Row.original.name`.
         name: string,
         normalizedName: string,
         word: string,
@@ -227,6 +229,11 @@ declare namespace rustdoc {
         path: string,
         ty: number,
         type: FunctionSearchType | null,
+        descIndex: number,
+        bitIndex: number,
+        implDisambiguator: String | null,
+        is_alias?: boolean,
+        original?: Row,
     }
 
     /**
diff --git a/src/librustdoc/html/static/js/search.js b/src/librustdoc/html/static/js/search.js
index 15cad31f555..2caf214ff73 100644
--- a/src/librustdoc/html/static/js/search.js
+++ b/src/librustdoc/html/static/js/search.js
@@ -830,7 +830,7 @@ function createQueryElement(query, parserState, name, generics, isInGenerics) {
  */
 function makePrimitiveElement(name, extra) {
     return Object.assign({
-        name: name,
+        name,
         id: null,
         fullPath: [name],
         pathWithoutLast: [],
@@ -1483,6 +1483,7 @@ class DocSearch {
          */
         this.assocTypeIdNameMap = new Map();
         this.ALIASES = new Map();
+        this.FOUND_ALIASES = new Set();
         this.rootPath = rootPath;
         this.searchState = searchState;
 
@@ -2030,6 +2031,8 @@ class DocSearch {
         // normalized names, type signature objects and fingerprints, and aliases.
         id = 0;
 
+        /** @type {Array<[string, { [key: string]: Array<number> },  number]>} */
+        const allAliases = [];
         for (const [crate, crateCorpus] of rawSearchIndex) {
             // a string representing the lengths of each description shard
             // a string representing the list of function types
@@ -2178,10 +2181,10 @@ class DocSearch {
                 paths[i] = { ty, name, path, exactPath, unboxFlag };
             }
 
-            // convert `item*` into an object form, and construct word indices.
+            // Convert `item*` into an object form, and construct word indices.
             //
-            // before any analysis is performed lets gather the search terms to
-            // search against apart from the rest of the data.  This is a quick
+            // Before any analysis is performed, let's gather the search terms to
+            // search against apart from the rest of the data. This is a quick
             // operation that is cached for the life of the page state so that
             // all other search operations have access to this cached data for
             // faster analysis operations
@@ -2269,29 +2272,58 @@ class DocSearch {
             }
 
             if (aliases) {
-                const currentCrateAliases = new Map();
-                this.ALIASES.set(crate, currentCrateAliases);
-                for (const alias_name in aliases) {
-                    if (!Object.prototype.hasOwnProperty.call(aliases, alias_name)) {
-                        continue;
-                    }
-
-                    /** @type{number[]} */
-                    let currentNameAliases;
-                    if (currentCrateAliases.has(alias_name)) {
-                        currentNameAliases = currentCrateAliases.get(alias_name);
-                    } else {
-                        currentNameAliases = [];
-                        currentCrateAliases.set(alias_name, currentNameAliases);
-                    }
-                    for (const local_alias of aliases[alias_name]) {
-                        currentNameAliases.push(local_alias + currentIndex);
-                    }
-                }
+                // We need to add the aliases in `searchIndex` after we finished filling it
+                // to not mess up indexes.
+                allAliases.push([crate, aliases, currentIndex]);
             }
             currentIndex += itemTypes.length;
             this.searchState.descShards.set(crate, descShardList);
         }
+
+        for (const [crate, aliases, index] of allAliases) {
+            for (const [alias_name, alias_refs] of Object.entries(aliases)) {
+                if (!this.ALIASES.has(crate)) {
+                    this.ALIASES.set(crate, new Map());
+                }
+                const word = alias_name.toLowerCase();
+                const crate_alias_map = this.ALIASES.get(crate);
+                if (!crate_alias_map.has(word)) {
+                    crate_alias_map.set(word, []);
+                }
+                const aliases_map = crate_alias_map.get(word);
+
+                const normalizedName = word.indexOf("_") === -1 ? word : word.replace(/_/g, "");
+                for (const alias of alias_refs) {
+                    const originalIndex = alias + index;
+                    const original = searchIndex[originalIndex];
+                    /** @type {rustdoc.Row} */
+                    const row = {
+                        crate,
+                        name: alias_name,
+                        normalizedName,
+                        is_alias: true,
+                        ty: original.ty,
+                        type: original.type,
+                        paramNames: [],
+                        word,
+                        id,
+                        parent: undefined,
+                        original,
+                        path: "",
+                        implDisambiguator: original.implDisambiguator,
+                        // Needed to load the description of the original item.
+                        // @ts-ignore
+                        descShard: original.descShard,
+                        descIndex: original.descIndex,
+                        bitIndex: original.bitIndex,
+                    };
+                    aliases_map.push(row);
+                    this.nameTrie.insert(normalizedName, id, this.tailTable);
+                    id += 1;
+                    searchIndex.push(row);
+                }
+            }
+        }
         // Drop the (rather large) hash table used for reusing function items
         this.TYPES_POOL = new Map();
         return searchIndex;
@@ -2536,6 +2568,8 @@ class DocSearch {
             parsedQuery.elems.reduce((acc, next) => acc + next.pathLast.length, 0) +
             parsedQuery.returned.reduce((acc, next) => acc + next.pathLast.length, 0);
         const maxEditDistance = Math.floor(queryLen / 3);
+        // We reinitialize the `FOUND_ALIASES` map.
+        this.FOUND_ALIASES.clear();
 
         /**
          * @type {Map<string, number>}
@@ -2695,6 +2729,10 @@ class DocSearch {
         const buildHrefAndPath = item => {
             let displayPath;
             let href;
+            if (item.is_alias) {
+                this.FOUND_ALIASES.add(item.word);
+                item = item.original;
+            }
             const type = itemTypes[item.ty];
             const name = item.name;
             let path = item.path;
@@ -3198,8 +3236,7 @@ class DocSearch {
                 result.item = this.searchIndex[result.id];
                 result.word = this.searchIndex[result.id].word;
                 if (isReturnTypeQuery) {
-                    // we are doing a return-type based search,
-                    // deprioritize "clone-like" results,
+                    // We are doing a return-type based search, deprioritize "clone-like" results,
                     // ie. functions that also take the queried type as an argument.
                     const resultItemType = result.item && result.item.type;
                     if (!resultItemType) {
@@ -4259,28 +4296,13 @@ class DocSearch {
             return false;
         }
 
-        // this does not yet have a type in `rustdoc.d.ts`.
-        // @ts-expect-error
-        function createAliasFromItem(item) {
-            return {
-                crate: item.crate,
-                name: item.name,
-                path: item.path,
-                descShard: item.descShard,
-                descIndex: item.descIndex,
-                exactPath: item.exactPath,
-                ty: item.ty,
-                parent: item.parent,
-                type: item.type,
-                is_alias: true,
-                bitIndex: item.bitIndex,
-                implDisambiguator: item.implDisambiguator,
-            };
-        }
-
         // @ts-expect-error
         const handleAliases = async(ret, query, filterCrates, currentCrate) => {
             const lowerQuery = query.toLowerCase();
+            if (this.FOUND_ALIASES.has(lowerQuery)) {
+                return;
+            }
+            this.FOUND_ALIASES.add(lowerQuery);
             // We separate aliases and crate aliases because we want to have current crate
             // aliases to be before the others in the displayed results.
             // @ts-expect-error
@@ -4292,7 +4314,7 @@ class DocSearch {
                     && this.ALIASES.get(filterCrates).has(lowerQuery)) {
                     const query_aliases = this.ALIASES.get(filterCrates).get(lowerQuery);
                     for (const alias of query_aliases) {
-                        aliases.push(createAliasFromItem(this.searchIndex[alias]));
+                        aliases.push(alias);
                     }
                 }
             } else {
@@ -4302,7 +4324,7 @@ class DocSearch {
                         const pushTo = crate === currentCrate ? crateAliases : aliases;
                         const query_aliases = crateAliasesIndex.get(lowerQuery);
                         for (const alias of query_aliases) {
-                            pushTo.push(createAliasFromItem(this.searchIndex[alias]));
+                            pushTo.push(alias);
                         }
                     }
                 }
@@ -4310,9 +4332,9 @@ class DocSearch {
 
             // @ts-expect-error
             const sortFunc = (aaa, bbb) => {
-                if (aaa.path < bbb.path) {
+                if (aaa.original.path < bbb.original.path) {
                     return 1;
-                } else if (aaa.path === bbb.path) {
+                } else if (aaa.original.path === bbb.original.path) {
                     return 0;
                 }
                 return -1;
@@ -4322,20 +4344,9 @@ class DocSearch {
             aliases.sort(sortFunc);
 
             // @ts-expect-error
-            const fetchDesc = alias => {
-                // @ts-expect-error
-                return this.searchIndexEmptyDesc.get(alias.crate).contains(alias.bitIndex) ?
-                    "" : this.searchState.loadDesc(alias);
-            };
-            const [crateDescs, descs] = await Promise.all([
-                // @ts-expect-error
-                Promise.all(crateAliases.map(fetchDesc)),
-                Promise.all(aliases.map(fetchDesc)),
-            ]);
-
-            // @ts-expect-error
             const pushFunc = alias => {
-                alias.alias = query;
+                // Cloning `alias` to prevent its fields to be updated.
+                alias = {...alias};
                 const res = buildHrefAndPath(alias);
                 alias.displayPath = pathSplitter(res[0]);
                 alias.fullPath = alias.displayPath + alias.name;
@@ -4347,16 +4358,8 @@ class DocSearch {
                 }
             };
 
-            aliases.forEach((alias, i) => {
-                // @ts-expect-error
-                alias.desc = descs[i];
-            });
             aliases.forEach(pushFunc);
             // @ts-expect-error
-            crateAliases.forEach((alias, i) => {
-                alias.desc = crateDescs[i];
-            });
-            // @ts-expect-error
             crateAliases.forEach(pushFunc);
         };
 
@@ -4802,7 +4805,7 @@ async function addTab(array, query, display) {
         output.className = "search-results " + extraClass;
 
         const lis = Promise.all(array.map(async item => {
-            const name = item.name;
+            const name = item.is_alias ? item.original.name : item.name;
             const type = itemTypes[item.ty];
             const longType = longItemTypes[item.ty];
             const typeName = longType.length !== 0 ? `${longType}` : "?";
@@ -4822,7 +4825,7 @@ async function addTab(array, query, display) {
             let alias = " ";
             if (item.is_alias) {
                 alias = ` <div class="alias">\
-<b>${item.alias}</b><i class="grey">&nbsp;- see&nbsp;</i>\
+<b>${item.name}</b><i class="grey">&nbsp;- see&nbsp;</i>\
 </div>`;
             }
             resultName.insertAdjacentHTML(
@@ -5201,6 +5204,7 @@ function registerSearchEvents() {
         if (searchState.input.value.length === 0) {
             searchState.hideResults();
         } else {
+            // @ts-ignore
             searchState.timeout = setTimeout(search, 500);
         }
     };
@@ -5842,8 +5846,8 @@ Lev1TParametricDescription.prototype.offsetIncrs3 = /*2 bits per value */ new In
 // be called ONLY when the whole file has been parsed and loaded.
 
 // @ts-expect-error
-function initSearch(searchIndx) {
-    rawSearchIndex = searchIndx;
+function initSearch(searchIndex) {
+    rawSearchIndex = searchIndex;
     if (typeof window !== "undefined") {
         // @ts-expect-error
         docSearch = new DocSearch(rawSearchIndex, ROOT_PATH, searchState);
diff --git a/src/librustdoc/html/url_parts_builder.rs b/src/librustdoc/html/url_parts_builder.rs
index 9a533827441..705fa498e8d 100644
--- a/src/librustdoc/html/url_parts_builder.rs
+++ b/src/librustdoc/html/url_parts_builder.rs
@@ -117,7 +117,7 @@ impl UrlPartsBuilder {
 
 /// This is just a guess at the average length of a URL part,
 /// used for [`String::with_capacity`] calls in the [`FromIterator`]
-/// and [`Extend`] impls, and for [estimating item path lengths].
+/// and [`Extend`] impls.
 ///
 /// The value `8` was chosen for two main reasons:
 ///
@@ -125,18 +125,8 @@ impl UrlPartsBuilder {
 /// * jemalloc's size classes are all multiples of eight,
 ///   which means that the amount of memory it allocates will often match
 ///   the amount requested, avoiding wasted bytes.
-///
-/// [estimating item path lengths]: estimate_item_path_byte_length
 const AVG_PART_LENGTH: usize = 8;
 
-/// Estimate the number of bytes in an item's path, based on how many segments it has.
-///
-/// **Note:** This is only to be used with, e.g., [`String::with_capacity()`];
-/// the return value is just a rough estimate.
-pub(crate) const fn estimate_item_path_byte_length(segment_count: usize) -> usize {
-    AVG_PART_LENGTH * segment_count
-}
-
 impl<'a> FromIterator<&'a str> for UrlPartsBuilder {
     fn from_iter<T: IntoIterator<Item = &'a str>>(iter: T) -> Self {
         let iter = iter.into_iter();
diff --git a/src/librustdoc/json/conversions.rs b/src/librustdoc/json/conversions.rs
index abf3f3fcedd..08bc0bb1950 100644
--- a/src/librustdoc/json/conversions.rs
+++ b/src/librustdoc/json/conversions.rs
@@ -5,9 +5,12 @@
 use rustc_abi::ExternAbi;
 use rustc_ast::ast;
 use rustc_attr_data_structures::{self as attrs, DeprecatedSince};
+use rustc_hir as hir;
 use rustc_hir::def::CtorKind;
 use rustc_hir::def_id::DefId;
+use rustc_hir::{HeaderSafety, Safety};
 use rustc_metadata::rendered_const;
+use rustc_middle::ty::TyCtxt;
 use rustc_middle::{bug, ty};
 use rustc_span::{Pos, kw, sym};
 use rustdoc_json_types::*;
@@ -38,11 +41,16 @@ impl JsonRenderer<'_> {
             })
             .collect();
         let docs = item.opt_doc_value();
-        let attrs = item.attributes(self.tcx, &self.cache, true);
+        let attrs = item
+            .attrs
+            .other_attrs
+            .iter()
+            .filter_map(|a| maybe_from_hir_attr(a, item.item_id, self.tcx))
+            .collect();
         let span = item.span(self.tcx);
         let visibility = item.visibility(self.tcx);
         let clean::ItemInner { name, item_id, .. } = *item.inner;
-        let id = self.id_from_item(&item);
+        let id = self.id_from_item(item);
         let inner = match item.kind {
             clean::KeywordItem => return None,
             clean::StrippedItem(ref inner) => {
@@ -78,14 +86,14 @@ impl JsonRenderer<'_> {
         items
             .iter()
             .filter(|i| !i.is_stripped() && !i.is_keyword())
-            .map(|i| self.id_from_item(&i))
+            .map(|i| self.id_from_item(i))
             .collect()
     }
 
     fn ids_keeping_stripped(&self, items: &[clean::Item]) -> Vec<Option<Id>> {
         items
             .iter()
-            .map(|i| (!i.is_stripped() && !i.is_keyword()).then(|| self.id_from_item(&i)))
+            .map(|i| (!i.is_stripped() && !i.is_keyword()).then(|| self.id_from_item(i)))
             .collect()
     }
 }
@@ -350,12 +358,12 @@ impl FromClean<clean::Struct> for Struct {
         let clean::Struct { ctor_kind, generics, fields } = struct_;
 
         let kind = match ctor_kind {
-            Some(CtorKind::Fn) => StructKind::Tuple(renderer.ids_keeping_stripped(&fields)),
+            Some(CtorKind::Fn) => StructKind::Tuple(renderer.ids_keeping_stripped(fields)),
             Some(CtorKind::Const) => {
                 assert!(fields.is_empty());
                 StructKind::Unit
             }
-            None => StructKind::Plain { fields: renderer.ids(&fields), has_stripped_fields },
+            None => StructKind::Plain { fields: renderer.ids(fields), has_stripped_fields },
         };
 
         Struct {
@@ -373,7 +381,7 @@ impl FromClean<clean::Union> for Union {
         Union {
             generics: generics.into_json(renderer),
             has_stripped_fields,
-            fields: renderer.ids(&fields),
+            fields: renderer.ids(fields),
             impls: Vec::new(), // Added in JsonRenderer::item
         }
     }
@@ -381,10 +389,22 @@ impl FromClean<clean::Union> for Union {
 
 impl FromClean<rustc_hir::FnHeader> for FunctionHeader {
     fn from_clean(header: &rustc_hir::FnHeader, renderer: &JsonRenderer<'_>) -> Self {
+        let is_unsafe = match header.safety {
+            HeaderSafety::SafeTargetFeatures => {
+                // The type system's internal implementation details consider
+                // safe functions with the `#[target_feature]` attribute to be analogous
+                // to unsafe functions: `header.is_unsafe()` returns `true` for them.
+                // For rustdoc, this isn't the right decision, so we explicitly return `false`.
+                // Context: https://github.com/rust-lang/rust/issues/142655
+                false
+            }
+            HeaderSafety::Normal(Safety::Safe) => false,
+            HeaderSafety::Normal(Safety::Unsafe) => true,
+        };
         FunctionHeader {
             is_async: header.is_async(),
             is_const: header.is_const(),
-            is_unsafe: header.is_unsafe(),
+            is_unsafe,
             abi: header.abi.into_json(renderer),
         }
     }
@@ -639,7 +659,7 @@ impl FromClean<clean::FnDecl> for FunctionSignature {
         let clean::FnDecl { inputs, output, c_variadic } = decl;
         FunctionSignature {
             inputs: inputs
-                .into_iter()
+                .iter()
                 .map(|param| {
                     // `_` is the most sensible name for missing param names.
                     let name = param.name.unwrap_or(kw::Underscore).to_string();
@@ -664,7 +684,7 @@ impl FromClean<clean::Trait> for Trait {
             is_auto,
             is_unsafe,
             is_dyn_compatible,
-            items: renderer.ids(&items),
+            items: renderer.ids(items),
             generics: generics.into_json(renderer),
             bounds: bounds.into_json(renderer),
             implementations: Vec::new(), // Added in JsonRenderer::item
@@ -707,7 +727,7 @@ impl FromClean<clean::Impl> for Impl {
                 .collect(),
             trait_: trait_.into_json(renderer),
             for_: for_.into_json(renderer),
-            items: renderer.ids(&items),
+            items: renderer.ids(items),
             is_negative,
             is_synthetic,
             blanket_impl: blanket_impl.map(|x| x.into_json(renderer)),
@@ -750,7 +770,7 @@ impl FromClean<clean::Variant> for Variant {
 
         let kind = match &variant.kind {
             CLike => VariantKind::Plain,
-            Tuple(fields) => VariantKind::Tuple(renderer.ids_keeping_stripped(&fields)),
+            Tuple(fields) => VariantKind::Tuple(renderer.ids_keeping_stripped(fields)),
             Struct(s) => VariantKind::Struct {
                 has_stripped_fields: s.has_stripped_entries(),
                 fields: renderer.ids(&s.fields),
@@ -873,3 +893,93 @@ impl FromClean<ItemType> for ItemKind {
         }
     }
 }
+
+/// Maybe convert a attribute from hir to json.
+///
+/// Returns `None` if the attribute shouldn't be in the output.
+fn maybe_from_hir_attr(
+    attr: &hir::Attribute,
+    item_id: ItemId,
+    tcx: TyCtxt<'_>,
+) -> Option<Attribute> {
+    use attrs::AttributeKind as AK;
+
+    let kind = match attr {
+        hir::Attribute::Parsed(kind) => kind,
+
+        hir::Attribute::Unparsed(_) => {
+            // FIXME: We should handle `#[doc(hidden)]`.
+            return Some(other_attr(tcx, attr));
+        }
+    };
+
+    Some(match kind {
+        AK::Deprecation { .. } => return None, // Handled separately into Item::deprecation.
+        AK::DocComment { .. } => unreachable!("doc comments stripped out earlier"),
+
+        AK::MustUse { reason, span: _ } => {
+            Attribute::MustUse { reason: reason.map(|s| s.to_string()) }
+        }
+        AK::Repr { .. } => repr_attr(
+            tcx,
+            item_id.as_def_id().expect("all items that could have #[repr] have a DefId"),
+        ),
+        AK::ExportName { name, span: _ } => Attribute::ExportName(name.to_string()),
+        AK::LinkSection { name, span: _ } => Attribute::LinkSection(name.to_string()),
+        AK::TargetFeature(features, _span) => Attribute::TargetFeature {
+            enable: features.iter().map(|(feat, _span)| feat.to_string()).collect(),
+        },
+
+        AK::NoMangle(_) => Attribute::NoMangle,
+        AK::NonExhaustive(_) => Attribute::NonExhaustive,
+        AK::AutomaticallyDerived(_) => Attribute::AutomaticallyDerived,
+
+        _ => other_attr(tcx, attr),
+    })
+}
+
+fn other_attr(tcx: TyCtxt<'_>, attr: &hir::Attribute) -> Attribute {
+    let mut s = rustc_hir_pretty::attribute_to_string(&tcx, attr);
+    assert_eq!(s.pop(), Some('\n'));
+    Attribute::Other(s)
+}
+
+fn repr_attr(tcx: TyCtxt<'_>, def_id: DefId) -> Attribute {
+    let repr = tcx.adt_def(def_id).repr();
+
+    let kind = if repr.c() {
+        ReprKind::C
+    } else if repr.transparent() {
+        ReprKind::Transparent
+    } else if repr.simd() {
+        ReprKind::Simd
+    } else {
+        ReprKind::Rust
+    };
+
+    let align = repr.align.map(|a| a.bytes());
+    let packed = repr.pack.map(|p| p.bytes());
+    let int = repr.int.map(format_integer_type);
+
+    Attribute::Repr(AttributeRepr { kind, align, packed, int })
+}
+
+fn format_integer_type(it: rustc_abi::IntegerType) -> String {
+    use rustc_abi::Integer::*;
+    use rustc_abi::IntegerType::*;
+    match it {
+        Pointer(true) => "isize",
+        Pointer(false) => "usize",
+        Fixed(I8, true) => "i8",
+        Fixed(I8, false) => "u8",
+        Fixed(I16, true) => "i16",
+        Fixed(I16, false) => "u16",
+        Fixed(I32, true) => "i32",
+        Fixed(I32, false) => "u32",
+        Fixed(I64, true) => "i64",
+        Fixed(I64, false) => "u64",
+        Fixed(I128, true) => "i128",
+        Fixed(I128, false) => "u128",
+    }
+    .to_owned()
+}
diff --git a/src/librustdoc/json/mod.rs b/src/librustdoc/json/mod.rs
index 600a4b429f3..760e48baffa 100644
--- a/src/librustdoc/json/mod.rs
+++ b/src/librustdoc/json/mod.rs
@@ -133,7 +133,7 @@ fn target(sess: &rustc_session::Session) -> types::Target {
     let feature_stability: FxHashMap<&str, Stability> = sess
         .target
         .rust_target_features()
-        .into_iter()
+        .iter()
         .copied()
         .map(|(name, stability, _)| (name, stability))
         .collect();
@@ -143,7 +143,7 @@ fn target(sess: &rustc_session::Session) -> types::Target {
         target_features: sess
             .target
             .rust_target_features()
-            .into_iter()
+            .iter()
             .copied()
             .filter(|(_, stability, _)| {
                 // Describe only target features which the user can toggle
@@ -157,7 +157,7 @@ fn target(sess: &rustc_session::Session) -> types::Target {
                         _ => None,
                     },
                     implies_features: implied_features
-                        .into_iter()
+                        .iter()
                         .copied()
                         .filter(|name| {
                             // Imply only target features which the user can toggle
diff --git a/src/librustdoc/passes/collect_intra_doc_links.rs b/src/librustdoc/passes/collect_intra_doc_links.rs
index ca6f67eb6df..5a9aa2a94c8 100644
--- a/src/librustdoc/passes/collect_intra_doc_links.rs
+++ b/src/librustdoc/passes/collect_intra_doc_links.rs
@@ -274,7 +274,7 @@ impl From<DiagnosticInfo<'_>> for OwnedDiagnosticInfo {
 }
 
 impl OwnedDiagnosticInfo {
-    pub(crate) fn into_info(&self) -> DiagnosticInfo<'_> {
+    pub(crate) fn as_info(&self) -> DiagnosticInfo<'_> {
         DiagnosticInfo {
             item: &self.item,
             ori_link: &self.ori_link,
@@ -1177,7 +1177,7 @@ impl LinkCollector<'_, '_> {
                     // Primitive types are always valid.
                     Res::Primitive(_) => true,
                 });
-                let diag_info = info.diag_info.into_info();
+                let diag_info = info.diag_info.as_info();
                 match info.resolved.len() {
                     1 => {
                         let (res, fragment) = info.resolved.pop().unwrap();
@@ -1243,17 +1243,16 @@ impl LinkCollector<'_, '_> {
             disambiguator,
             None | Some(Disambiguator::Namespace(Namespace::TypeNS) | Disambiguator::Primitive)
         ) && !matches!(res, Res::Primitive(_))
+            && let Some(prim) = resolve_primitive(path_str, TypeNS)
         {
-            if let Some(prim) = resolve_primitive(path_str, TypeNS) {
-                // `prim@char`
-                if matches!(disambiguator, Some(Disambiguator::Primitive)) {
-                    res = prim;
-                } else {
-                    // `[char]` when a `char` module is in scope
-                    let candidates = &[(res, res.def_id(self.cx.tcx)), (prim, None)];
-                    ambiguity_error(self.cx, &diag_info, path_str, candidates, true);
-                    return None;
-                }
+            // `prim@char`
+            if matches!(disambiguator, Some(Disambiguator::Primitive)) {
+                res = prim;
+            } else {
+                // `[char]` when a `char` module is in scope
+                let candidates = &[(res, res.def_id(self.cx.tcx)), (prim, None)];
+                ambiguity_error(self.cx, &diag_info, path_str, candidates, true);
+                return None;
             }
         }
 
@@ -2233,7 +2232,7 @@ fn ambiguity_error(
     // proc macro can exist in multiple namespaces at once, so we need to compare `DefIds`
     //  to remove the candidate in the fn namespace.
     let mut possible_proc_macro_id = None;
-    let is_proc_macro_crate = cx.tcx.crate_types() == &[CrateType::ProcMacro];
+    let is_proc_macro_crate = cx.tcx.crate_types() == [CrateType::ProcMacro];
     let mut kinds = candidates
         .iter()
         .map(|(res, def_id)| {
diff --git a/src/librustdoc/passes/lint/redundant_explicit_links.rs b/src/librustdoc/passes/lint/redundant_explicit_links.rs
index 5757b6a9740..e69cf87f957 100644
--- a/src/librustdoc/passes/lint/redundant_explicit_links.rs
+++ b/src/librustdoc/passes/lint/redundant_explicit_links.rs
@@ -93,14 +93,14 @@ fn check_redundant_explicit_link<'md>(
         if let Event::Start(Tag::Link { link_type, dest_url, .. }) = event {
             let link_data = collect_link_data(&mut offset_iter);
 
-            if let Some(resolvable_link) = link_data.resolvable_link.as_ref() {
-                if &link_data.display_link.replace('`', "") != resolvable_link {
-                    // Skips if display link does not match to actual
-                    // resolvable link, usually happens if display link
-                    // has several segments, e.g.
-                    // [this is just an `Option`](Option)
-                    continue;
-                }
+            if let Some(resolvable_link) = link_data.resolvable_link.as_ref()
+                && &link_data.display_link.replace('`', "") != resolvable_link
+            {
+                // Skips if display link does not match to actual
+                // resolvable link, usually happens if display link
+                // has several segments, e.g.
+                // [this is just an `Option`](Option)
+                continue;
             }
 
             let explicit_link = dest_url.to_string();
diff --git a/src/librustdoc/passes/strip_aliased_non_local.rs b/src/librustdoc/passes/strip_aliased_non_local.rs
index b53e3b4e3d7..bb13308e6c2 100644
--- a/src/librustdoc/passes/strip_aliased_non_local.rs
+++ b/src/librustdoc/passes/strip_aliased_non_local.rs
@@ -47,13 +47,11 @@ impl DocFolder for NonLocalStripper<'_> {
         // FIXME(#125009): Not-local should probably consider same Cargo workspace
         if let Some(def_id) = i.def_id()
             && !def_id.is_local()
-        {
-            if i.is_doc_hidden()
+            && (i.is_doc_hidden()
                 // Default to *not* stripping items with inherited visibility.
-                || i.visibility(self.tcx).is_some_and(|viz| viz != Visibility::Public)
-            {
-                return Some(strip_item(i));
-            }
+                || i.visibility(self.tcx).is_some_and(|viz| viz != Visibility::Public))
+        {
+            return Some(strip_item(i));
         }
 
         Some(self.fold_item_recur(i))
diff --git a/src/librustdoc/visit_ast.rs b/src/librustdoc/visit_ast.rs
index 2889bfae7b0..9058277d72e 100644
--- a/src/librustdoc/visit_ast.rs
+++ b/src/librustdoc/visit_ast.rs
@@ -32,11 +32,29 @@ pub(crate) struct Module<'hir> {
     pub(crate) def_id: LocalDefId,
     pub(crate) renamed: Option<Symbol>,
     pub(crate) import_id: Option<LocalDefId>,
-    /// The key is the item `ItemId` and the value is: (item, renamed, import_id).
+    /// The key is the item `ItemId` and the value is: (item, renamed, Vec<import_id>).
     /// We use `FxIndexMap` to keep the insert order.
+    ///
+    /// `import_id` needs to be a `Vec` because we live in a dark world where you can have code
+    /// like:
+    ///
+    /// ```
+    /// mod raw {
+    ///     pub fn foo() {}
+    /// }
+    ///
+    /// /// Foobar
+    /// pub use raw::foo;
+    ///
+    /// pub use raw::*;
+    /// ```
+    ///
+    /// So in this case, we don't want to have two items but just one with attributes from all
+    /// non-glob imports to be merged. Glob imports attributes are always ignored, whether they're
+    /// shadowed or not.
     pub(crate) items: FxIndexMap<
         (LocalDefId, Option<Symbol>),
-        (&'hir hir::Item<'hir>, Option<Symbol>, Option<LocalDefId>),
+        (&'hir hir::Item<'hir>, Option<Symbol>, Vec<LocalDefId>),
     >,
 
     /// (def_id, renamed) -> (res, local_import_id)
@@ -154,7 +172,9 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
             {
                 let item = self.cx.tcx.hir_expect_item(local_def_id);
                 let (ident, _, _) = item.expect_macro();
-                top_level_module.items.insert((local_def_id, Some(ident.name)), (item, None, None));
+                top_level_module
+                    .items
+                    .insert((local_def_id, Some(ident.name)), (item, None, Vec::new()));
             }
         }
 
@@ -236,7 +256,6 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
     ) -> bool {
         debug!("maybe_inline_local (renamed: {renamed:?}) res: {res:?}");
 
-        let glob = renamed.is_none();
         if renamed == Some(kw::Underscore) {
             // We never inline `_` reexports.
             return false;
@@ -261,6 +280,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
             return false;
         }
 
+        let is_glob = renamed.is_none();
         let is_hidden = !document_hidden && tcx.is_doc_hidden(ori_res_did);
         let Some(res_did) = ori_res_did.as_local() else {
             // For cross-crate impl inlining we need to know whether items are
@@ -268,7 +288,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
             // made reachable by cross-crate inlining which we're checking here.
             // (this is done here because we need to know this upfront).
             crate::visit_lib::lib_embargo_visit_item(self.cx, ori_res_did);
-            if is_hidden || glob {
+            if is_hidden || is_glob {
                 return false;
             }
             // We store inlined foreign items otherwise, it'd mean that the `use` item would be kept
@@ -316,10 +336,10 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
             // Bang macros are handled a bit on their because of how they are handled by the
             // compiler. If they have `#[doc(hidden)]` and the re-export doesn't have
             // `#[doc(inline)]`, then we don't inline it.
-            Node::Item(_) if is_bang_macro && !please_inline && renamed.is_some() && is_hidden => {
+            Node::Item(_) if is_bang_macro && !please_inline && !is_glob && is_hidden => {
                 return false;
             }
-            Node::Item(&hir::Item { kind: hir::ItemKind::Mod(_, m), .. }) if glob => {
+            Node::Item(&hir::Item { kind: hir::ItemKind::Mod(_, m), .. }) if is_glob => {
                 let prev = mem::replace(&mut self.inlining, true);
                 for &i in m.item_ids {
                     let i = tcx.hir_item(i);
@@ -328,13 +348,13 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
                 self.inlining = prev;
                 true
             }
-            Node::Item(it) if !glob => {
+            Node::Item(it) if !is_glob => {
                 let prev = mem::replace(&mut self.inlining, true);
                 self.visit_item_inner(it, renamed, Some(def_id));
                 self.inlining = prev;
                 true
             }
-            Node::ForeignItem(it) if !glob => {
+            Node::ForeignItem(it) if !is_glob => {
                 let prev = mem::replace(&mut self.inlining, true);
                 self.visit_foreign_item_inner(it, renamed, Some(def_id));
                 self.inlining = prev;
@@ -378,8 +398,8 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
     fn add_to_current_mod(
         &mut self,
         item: &'tcx hir::Item<'_>,
-        renamed: Option<Symbol>,
-        parent_id: Option<LocalDefId>,
+        mut renamed: Option<Symbol>,
+        import_id: Option<LocalDefId>,
     ) {
         if self.is_importable_from_parent
             // If we're inside an item, only impl blocks and `macro_rules!` with the `macro_export`
@@ -392,11 +412,21 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
                 _ => false,
             }
         {
-            self.modules
-                .last_mut()
-                .unwrap()
-                .items
-                .insert((item.owner_id.def_id, renamed), (item, renamed, parent_id));
+            if renamed == item.kind.ident().map(|ident| ident.name) {
+                renamed = None;
+            }
+            let key = (item.owner_id.def_id, renamed);
+            if let Some(import_id) = import_id {
+                self.modules
+                    .last_mut()
+                    .unwrap()
+                    .items
+                    .entry(key)
+                    .and_modify(|v| v.2.push(import_id))
+                    .or_insert_with(|| (item, renamed, vec![import_id]));
+            } else {
+                self.modules.last_mut().unwrap().items.insert(key, (item, renamed, Vec::new()));
+            }
         }
     }
 
@@ -439,8 +469,8 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
 
         match item.kind {
             hir::ItemKind::ForeignMod { items, .. } => {
-                for item in items {
-                    let item = tcx.hir_foreign_item(item.id);
+                for &item in items {
+                    let item = tcx.hir_foreign_item(item);
                     self.visit_foreign_item_inner(item, None, None);
                 }
             }
@@ -468,7 +498,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
                             _ => false,
                         });
                         let ident = match kind {
-                            hir::UseKind::Single(ident) => Some(renamed.unwrap_or(ident.name)),
+                            hir::UseKind::Single(ident) => Some(ident.name),
                             hir::UseKind::Glob => None,
                             hir::UseKind::ListStem => unreachable!(),
                         };
diff --git a/src/llvm-project b/src/llvm-project
-Subproject 9b1bf4cf041c1c1fe62cf03891ac90431615e78
+Subproject e8a2ffcf322f45b8dce82c65ab27a3e2430a6b5
diff --git a/src/rustdoc-json-types/lib.rs b/src/rustdoc-json-types/lib.rs
index 0e72ddd9db1..6235b0e8576 100644
--- a/src/rustdoc-json-types/lib.rs
+++ b/src/rustdoc-json-types/lib.rs
@@ -37,8 +37,8 @@ pub type FxHashMap<K, V> = HashMap<K, V>; // re-export for use in src/librustdoc
 // will instead cause conflicts. See #94591 for more. (This paragraph and the "Latest feature" line
 // are deliberately not in a doc comment, because they need not be in public docs.)
 //
-// Latest feature: Pretty printing of no_mangle attributes changed
-pub const FORMAT_VERSION: u32 = 53;
+// Latest feature: Structured Attributes
+pub const FORMAT_VERSION: u32 = 54;
 
 /// The root of the emitted JSON blob.
 ///
@@ -195,13 +195,94 @@ pub struct Item {
     /// - `#[repr(C)]` and other reprs also appear as themselves,
     ///   though potentially with a different order: e.g. `repr(i8, C)` may become `repr(C, i8)`.
     ///   Multiple repr attributes on the same item may be combined into an equivalent single attr.
-    pub attrs: Vec<String>,
+    pub attrs: Vec<Attribute>,
     /// Information about the item’s deprecation, if present.
     pub deprecation: Option<Deprecation>,
     /// The type-specific fields describing this item.
     pub inner: ItemEnum,
 }
 
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+/// An attribute, e.g. `#[repr(C)]`
+///
+/// This doesn't include:
+/// - `#[doc = "Doc Comment"]` or `/// Doc comment`. These are in [`Item::docs`] instead.
+/// - `#[deprecated]`. These are in [`Item::deprecation`] instead.
+pub enum Attribute {
+    /// `#[non_exhaustive]`
+    NonExhaustive,
+
+    /// `#[must_use]`
+    MustUse { reason: Option<String> },
+
+    /// `#[export_name = "name"]`
+    ExportName(String),
+
+    /// `#[link_section = "name"]`
+    LinkSection(String),
+
+    /// `#[automatically_derived]`
+    AutomaticallyDerived,
+
+    /// `#[repr]`
+    Repr(AttributeRepr),
+
+    /// `#[no_mangle]`
+    NoMangle,
+
+    /// #[target_feature(enable = "feature1", enable = "feature2")]
+    TargetFeature { enable: Vec<String> },
+
+    /// Something else.
+    ///
+    /// Things here are explicitly *not* covered by the [`FORMAT_VERSION`]
+    /// constant, and may change without bumping the format version.
+    ///
+    /// As an implementation detail, this is currently either:
+    /// 1. A HIR debug printing, like `"#[attr = Optimize(Speed)]"`
+    /// 2. The attribute as it appears in source form, like
+    ///    `"#[optimize(speed)]"`.
+    Other(String),
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+/// The contents of a `#[repr(...)]` attribute.
+///
+/// Used in [`Attribute::Repr`].
+pub struct AttributeRepr {
+    /// The representation, e.g. `#[repr(C)]`, `#[repr(transparent)]`
+    pub kind: ReprKind,
+
+    /// Alignment in bytes, if explicitly specified by `#[repr(align(...)]`.
+    pub align: Option<u64>,
+    /// Alignment in bytes, if explicitly specified by `#[repr(packed(...)]]`.
+    pub packed: Option<u64>,
+
+    /// The integer type for an enum descriminant, if explicitly specified.
+    ///
+    /// e.g. `"i32"`, for `#[repr(C, i32)]`
+    pub int: Option<String>,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+/// The kind of `#[repr]`.
+///
+/// See [AttributeRepr::kind]`.
+pub enum ReprKind {
+    /// `#[repr(Rust)]`
+    ///
+    /// Also the default.
+    Rust,
+    /// `#[repr(C)]`
+    C,
+    /// `#[repr(transparent)]
+    Transparent,
+    /// `#[repr(simd)]`
+    Simd,
+}
+
 /// A range of source code.
 #[derive(Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
 pub struct Span {
@@ -1343,7 +1424,7 @@ pub struct Static {
 
     /// Is the static `unsafe`?
     ///
-    /// This is only true if it's in an `extern` block, and not explicity marked
+    /// This is only true if it's in an `extern` block, and not explicitly marked
     /// as `safe`.
     ///
     /// ```rust
diff --git a/src/tools/cargo b/src/tools/cargo
-Subproject 930b4f62cfcd1f0eabdb30a56d91bf6844b739b
+Subproject 6833aa715d724437dc1247d0166afe314ab6854
diff --git a/src/tools/clippy/.github/workflows/feature_freeze.yml b/src/tools/clippy/.github/workflows/feature_freeze.yml
index a5f8d4bc145..7ad58af77d4 100644
--- a/src/tools/clippy/.github/workflows/feature_freeze.yml
+++ b/src/tools/clippy/.github/workflows/feature_freeze.yml
@@ -1,7 +1,11 @@
 name: Feature freeze check
 
 on:
-  pull_request:
+  pull_request_target:
+    types:
+      - opened
+    branches:
+      - master
     paths:
       - 'clippy_lints/src/declared_lints.rs'
 
@@ -9,6 +13,12 @@ jobs:
   auto-comment:
     runs-on: ubuntu-latest
 
+    permissions:
+      pull-requests: write
+
+    # Do not in any case add code that runs anything coming from the  the content
+    # of the pull request, as malicious code would be able to access the private
+    # GitHub token.
     steps:
     - name: Check PR Changes
       id: pr-changes
@@ -19,7 +29,7 @@ jobs:
       run: |
         # Use GitHub API to create a comment on the PR
         PR_NUMBER=${{ github.event.pull_request.number }}
-        COMMENT="**Seems that you are trying to add a new lint!**\nWe are currently in a [feature freeze](https://doc.rust-lang.org/nightly/clippy/development/feature_freeze.html), so we are delaying all lint-adding PRs to August 1st and focusing on bugfixes.\nThanks a lot for your contribution, and sorry for the inconvenience.\nWith ❤ from the Clippy team"
+        COMMENT="**Seems that you are trying to add a new lint!**\nWe are currently in a [feature freeze](https://doc.rust-lang.org/nightly/clippy/development/feature_freeze.html), so we are delaying all lint-adding PRs to September 18 and focusing on bugfixes.\nThanks a lot for your contribution, and sorry for the inconvenience.\nWith ❤ from the Clippy team\n\n@rustbot note Feature-freeze\n@rustbot blocked\n@rustbot label +A-lint\n"
         GITHUB_TOKEN=${{ secrets.GITHUB_TOKEN }}
         COMMENT_URL="https://api.github.com/repos/${{ github.repository }}/issues/${PR_NUMBER}/comments"
         curl -s -H "Authorization: token ${GITHUB_TOKEN}" -X POST $COMMENT_URL -d "{\"body\":\"$COMMENT\"}"
diff --git a/src/tools/clippy/.github/workflows/lintcheck.yml b/src/tools/clippy/.github/workflows/lintcheck.yml
index 70c805903d3..003d0395739 100644
--- a/src/tools/clippy/.github/workflows/lintcheck.yml
+++ b/src/tools/clippy/.github/workflows/lintcheck.yml
@@ -128,21 +128,27 @@ jobs:
     - name: Download JSON
       uses: actions/download-artifact@v4
 
+    - name: Store PR number
+      run: echo ${{ github.event.pull_request.number }} > pr.txt
+
     - name: Diff results
-      # GH's summery has a maximum size of 1024k:
-      # https://docs.github.com/actions/using-workflows/workflow-commands-for-github-actions#adding-a-markdown-summary
-      # That's why we first log to file and then to the summary and logs
+      # GH's summery has a maximum size of 1MiB:
+      # https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/workflow-commands-for-github-actions#step-isolation-and-limits
+      # We upload the full diff as an artifact in case it's truncated
       run: |
-        ./target/debug/lintcheck diff {base,head}/ci_crates_logs.json --truncate >> truncated_diff.md
-        head -c 1024000 truncated_diff.md >> $GITHUB_STEP_SUMMARY
-        cat truncated_diff.md
-        ./target/debug/lintcheck diff {base,head}/ci_crates_logs.json >> full_diff.md
+        ./target/debug/lintcheck diff {base,head}/ci_crates_logs.json --truncate | head -c 1M > $GITHUB_STEP_SUMMARY
+        ./target/debug/lintcheck diff {base,head}/ci_crates_logs.json --write-summary summary.json > full_diff.md
 
     - name: Upload full diff
       uses: actions/upload-artifact@v4
       with:
-        name: diff
-        if-no-files-found: ignore
+        name: full_diff
+        path: full_diff.md
+
+    - name: Upload summary
+      uses: actions/upload-artifact@v4
+      with:
+        name: summary
         path: |
-          full_diff.md
-          truncated_diff.md
+          summary.json
+          pr.txt
diff --git a/src/tools/clippy/.github/workflows/lintcheck_summary.yml b/src/tools/clippy/.github/workflows/lintcheck_summary.yml
new file mode 100644
index 00000000000..52f52e155a0
--- /dev/null
+++ b/src/tools/clippy/.github/workflows/lintcheck_summary.yml
@@ -0,0 +1,106 @@
+name: Lintcheck summary
+
+# The workflow_run event runs in the context of the Clippy repo giving it write
+# access, needed here to create a PR comment when the PR originates from a fork
+#
+# The summary artifact is a JSON file that we verify in this action to prevent
+# the creation of arbitrary comments
+#
+# This action must not checkout/run code from the originating workflow_run
+# or directly interpolate ${{}} untrusted fields into code
+#
+# https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows#workflow_run
+# https://docs.github.com/en/actions/security-for-github-actions/security-guides/security-hardening-for-github-actions#understanding-the-risk-of-script-injections
+
+on:
+  workflow_run:
+    workflows: [Lintcheck]
+    types: [completed]
+
+# Restrict the default permission scope https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#defining-access-for-the-github_token-scopes
+permissions:
+  pull-requests: write
+
+jobs:
+  download:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    steps:
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: summary
+          path: untrusted
+          run-id: ${{ github.event.workflow_run.id }}
+          github-token: ${{ github.token }}
+
+      - name: Format comment
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const fs = require("fs");
+            const assert = require("assert/strict");
+
+            function validateName(s) {
+              assert.match(s, /^[a-z0-9_:]+$/);
+              return s;
+            }
+
+            function validateInt(i) {
+              assert.ok(Number.isInteger(i));
+              return i;
+            }
+
+            function tryReadSummary() {
+              try {
+                return JSON.parse(fs.readFileSync("untrusted/summary.json"));
+              } catch {
+                return null;
+              }
+            }
+
+            const prNumber = parseInt(fs.readFileSync("untrusted/pr.txt"), 10);
+            core.exportVariable("PR", prNumber.toString());
+
+            const untrustedSummary = tryReadSummary();
+            if (!Array.isArray(untrustedSummary)) {
+              return;
+            }
+
+            let summary = `Lintcheck changes for ${context.payload.workflow_run.head_sha}
+            
+            | Lint | Added | Removed | Changed |
+            | ---- | ----: | ------: | ------: |
+            `;
+
+            for (const untrustedRow of untrustedSummary) {
+              const name = validateName(untrustedRow.name);
+
+              const added = validateInt(untrustedRow.added);
+              const removed = validateInt(untrustedRow.removed);
+              const changed = validateInt(untrustedRow.changed);
+
+              const id = name.replace("clippy::", "user-content-").replaceAll("_", "-");
+              const url = `https://github.com/${process.env.GITHUB_REPOSITORY}/actions/runs/${context.payload.workflow_run.id}#${id}`;
+
+              summary += `| [\`${name}\`](${url}) | ${added} | ${removed} | ${changed} |\n`;
+            }
+
+            summary += "\nThis comment will be updated if you push new changes";
+
+            fs.writeFileSync("summary.md", summary);
+
+      - name: Create/update comment
+        run: |
+          if [[ -f summary.md ]]; then
+             gh pr comment "$PR" --body-file summary.md --edit-last --create-if-none
+          else
+            # There were no changes detected by Lintcheck
+            # - If a comment exists from a previous run that did detect changes, edit it (--edit-last)
+            # - If no comment exists do not create one, the `gh` command exits with an error which
+            #   `|| true` ignores
+            gh pr comment "$PR" --body "No changes for ${{ github.event.workflow_run.head_sha }}" --edit-last || true
+          fi
+        env:
+          GH_TOKEN: ${{ github.token }}
+          GH_REPO: ${{ github.repository }}
diff --git a/src/tools/clippy/Cargo.toml b/src/tools/clippy/Cargo.toml
index 1278427b5a7..f25f9ab54dd 100644
--- a/src/tools/clippy/Cargo.toml
+++ b/src/tools/clippy/Cargo.toml
@@ -28,13 +28,13 @@ declare_clippy_lint = { path = "declare_clippy_lint" }
 rustc_tools_util = { path = "rustc_tools_util", version = "0.4.2" }
 clippy_lints_internal = { path = "clippy_lints_internal", optional = true }
 tempfile = { version = "3.20", optional = true }
-termize = "0.1"
+termize = "0.2"
 color-print = "0.3.4"
 anstream = "0.6.18"
 
 [dev-dependencies]
 cargo_metadata = "0.18.1"
-ui_test = "0.29.2"
+ui_test = "0.30.2"
 regex = "1.5.5"
 serde = { version = "1.0.145", features = ["derive"] }
 serde_json = "1.0.122"
@@ -45,14 +45,6 @@ itertools = "0.12"
 pulldown-cmark = { version = "0.11", default-features = false, features = ["html"] }
 askama = { version = "0.14", default-features = false, features = ["alloc", "config", "derive"] }
 
-# UI test dependencies
-if_chain = "1.0"
-quote = "1.0.25"
-syn = { version = "2.0", features = ["full"] }
-futures = "0.3"
-parking_lot = "0.12"
-tokio = { version = "1", features = ["io-util"] }
-
 [build-dependencies]
 rustc_tools_util = { path = "rustc_tools_util", version = "0.4.2" }
 
diff --git a/src/tools/clippy/book/src/development/infrastructure/backport.md b/src/tools/clippy/book/src/development/infrastructure/backport.md
index 9526d8af1c9..47ea6a412c5 100644
--- a/src/tools/clippy/book/src/development/infrastructure/backport.md
+++ b/src/tools/clippy/book/src/development/infrastructure/backport.md
@@ -109,4 +109,4 @@ worth backporting this.
 When a PR is backported to Rust `beta`, label the PR with `beta-accepted`. This
 will then get picked up when [writing the changelog].
 
-[writing the changelog]: changelog_update.md#31-include-beta-accepted-prs
+[writing the changelog]: changelog_update.md#4-include-beta-accepted-prs
diff --git a/src/tools/clippy/book/src/development/infrastructure/changelog_update.md b/src/tools/clippy/book/src/development/infrastructure/changelog_update.md
index eede6b78d92..c96ff228b01 100644
--- a/src/tools/clippy/book/src/development/infrastructure/changelog_update.md
+++ b/src/tools/clippy/book/src/development/infrastructure/changelog_update.md
@@ -38,7 +38,7 @@ Usually you want to write the changelog of the **upcoming stable release**. Make
 sure though, that `beta` was already branched in the Rust repository.
 
 To find the commit hash, issue the following command when in a `rust-lang/rust`
-checkout:
+checkout (most of the time on the `upstream/beta` branch):
 ```
 git log --oneline -- src/tools/clippy/ | grep -o "Merge commit '[a-f0-9]*' into .*" | head -1 | sed -e "s/Merge commit '\([a-f0-9]*\)' into .*/\1/g"
 ```
@@ -48,16 +48,13 @@ git log --oneline -- src/tools/clippy/ | grep -o "Merge commit '[a-f0-9]*' into
 Once you've got the correct commit range, run
 
 ```
-util/fetch_prs_between.sh commit1 commit2 > changes.txt
+util/fetch_prs_between.sh start_commit end_commit > changes.txt
 ```
 
-where `commit2` is the commit hash from the previous command and `commit1`
-is the commit hash from the current CHANGELOG file.
+where `end_commit` is the commit hash from the previous command and `start_commit`
+is [the commit hash][beta_section] from the current CHANGELOG file.
 Open `changes.txt` file in your editor of choice.
 
-When updating the changelog it's also a good idea to make sure that `commit1` is
-already correct in the current changelog.
-
 ### 3. Authoring the final changelog
 
 The above script should have dumped all the relevant PRs to the file you
@@ -70,17 +67,7 @@ With the PRs filtered, you can start to take each PR and move the `changelog: `
 content to `CHANGELOG.md`. Adapt the wording as you see fit but try to keep it
 somewhat coherent.
 
-The order should roughly be:
-
-1. New lints
-2. Moves or deprecations of lints
-3. Changes that expand what code existing lints cover
-4. False positive fixes
-5. ICE fixes
-6. Documentation improvements
-7. Others
-
-As section headers, we use:
+The sections order should roughly be:
 
 ```
 ### New Lints
@@ -97,10 +84,10 @@ As section headers, we use:
 ### Others
 ```
 
-Please also be sure to update the Beta/Unreleased sections at the top with the
-relevant commit ranges.
+Please also be sure to update [the `Unreleased/Beta/In Rust Nightly` section][beta_section] at the top with the
+relevant commits ranges and to add the `Rust <version>` section with release date and PR ranges.
 
-#### 3.1 Include `beta-accepted` PRs
+### 4. Include `beta-accepted` PRs
 
 Look for the [`beta-accepted`] label and make sure to also include the PRs with
 that label in the changelog. If you can, remove the `beta-accepted` labels
@@ -109,7 +96,7 @@ that label in the changelog. If you can, remove the `beta-accepted` labels
 > _Note:_ Some of those PRs might even get backported to the previous `beta`.
 > Those have to be included in the changelog of the _previous_ release.
 
-### 4. Update `clippy::version` attributes
+### 5. Update `clippy::version` attributes
 
 Next, make sure to check that the `#[clippy::version]` attributes for the added
 lints contain the correct version. 
@@ -129,3 +116,4 @@ written for. If not, update the version to the changelog version.
 [rust_beta_tools]: https://github.com/rust-lang/rust/tree/beta/src/tools/clippy
 [rust_stable_tools]: https://github.com/rust-lang/rust/releases
 [`beta-accepted`]: https://github.com/rust-lang/rust-clippy/issues?q=label%3Abeta-accepted+
+[beta_section]: https://github.com/rust-lang/rust-clippy/blob/master/CHANGELOG.md#unreleased--beta--in-rust-nightly
diff --git a/src/tools/clippy/book/src/lint_configuration.md b/src/tools/clippy/book/src/lint_configuration.md
index e9b7f42a183..992ed2c6aaa 100644
--- a/src/tools/clippy/book/src/lint_configuration.md
+++ b/src/tools/clippy/book/src/lint_configuration.md
@@ -892,6 +892,7 @@ The minimum rust version that the project supports. Defaults to the `rust-versio
 * [`unnested_or_patterns`](https://rust-lang.github.io/rust-clippy/master/index.html#unnested_or_patterns)
 * [`unused_trait_names`](https://rust-lang.github.io/rust-clippy/master/index.html#unused_trait_names)
 * [`use_self`](https://rust-lang.github.io/rust-clippy/master/index.html#use_self)
+* [`zero_ptr`](https://rust-lang.github.io/rust-clippy/master/index.html#zero_ptr)
 
 
 ## `pass-by-value-size-limit`
diff --git a/src/tools/clippy/clippy_config/src/conf.rs b/src/tools/clippy/clippy_config/src/conf.rs
index 841facdca06..555f54bcfb8 100644
--- a/src/tools/clippy/clippy_config/src/conf.rs
+++ b/src/tools/clippy/clippy_config/src/conf.rs
@@ -794,6 +794,7 @@ define_Conf! {
         unnested_or_patterns,
         unused_trait_names,
         use_self,
+        zero_ptr,
     )]
     msrv: Msrv = Msrv::default(),
     /// The minimum size (in bytes) to consider a type for passing by reference instead of by value.
diff --git a/src/tools/clippy/clippy_dev/src/fmt.rs b/src/tools/clippy/clippy_dev/src/fmt.rs
index c1b6b370706..bd9e57c9f6d 100644
--- a/src/tools/clippy/clippy_dev/src/fmt.rs
+++ b/src/tools/clippy/clippy_dev/src/fmt.rs
@@ -223,7 +223,7 @@ fn fmt_conf(check: bool) -> Result<(), Error> {
         if check {
             return Err(Error::CheckFailed);
         }
-        fs::write(path, new_text.as_bytes())?;
+        fs::write(path, new_text)?;
     }
     Ok(())
 }
diff --git a/src/tools/clippy/clippy_dev/src/lib.rs b/src/tools/clippy/clippy_dev/src/lib.rs
index 3361443196a..40aadf4589a 100644
--- a/src/tools/clippy/clippy_dev/src/lib.rs
+++ b/src/tools/clippy/clippy_dev/src/lib.rs
@@ -2,7 +2,6 @@
     rustc_private,
     exit_status_error,
     if_let_guard,
-    let_chains,
     os_str_slice,
     os_string_truncate,
     slice_split_once
diff --git a/src/tools/clippy/clippy_lints/src/arbitrary_source_item_ordering.rs b/src/tools/clippy/clippy_lints/src/arbitrary_source_item_ordering.rs
index 8b6bfaebbe5..a9d3015ce5c 100644
--- a/src/tools/clippy/clippy_lints/src/arbitrary_source_item_ordering.rs
+++ b/src/tools/clippy/clippy_lints/src/arbitrary_source_item_ordering.rs
@@ -8,11 +8,13 @@ use clippy_utils::diagnostics::span_lint_and_note;
 use clippy_utils::is_cfg_test;
 use rustc_attr_data_structures::AttributeKind;
 use rustc_hir::{
-    AssocItemKind, Attribute, FieldDef, HirId, ImplItemRef, IsAuto, Item, ItemKind, Mod, QPath, TraitItemRef, TyKind,
+    Attribute, FieldDef, HirId, IsAuto, ImplItemId, Item, ItemKind, Mod, OwnerId, QPath, TraitItemId, TyKind,
     Variant, VariantData,
 };
+use rustc_middle::ty::AssocKind;
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_session::impl_lint_pass;
+use rustc_span::Ident;
 
 declare_clippy_lint! {
     /// ### What it does
@@ -194,22 +196,22 @@ impl ArbitrarySourceItemOrdering {
     }
 
     /// Produces a linting warning for incorrectly ordered impl items.
-    fn lint_impl_item<T: LintContext>(&self, cx: &T, item: &ImplItemRef, before_item: &ImplItemRef) {
+    fn lint_impl_item(&self, cx: &LateContext<'_>, item: ImplItemId, before_item: ImplItemId) {
         span_lint_and_note(
             cx,
             ARBITRARY_SOURCE_ITEM_ORDERING,
-            item.span,
+            cx.tcx.def_span(item.owner_id),
             format!(
                 "incorrect ordering of impl items (defined order: {:?})",
                 self.assoc_types_order
             ),
-            Some(before_item.span),
-            format!("should be placed before `{}`", before_item.ident.name),
+            Some(cx.tcx.def_span(before_item.owner_id)),
+            format!("should be placed before `{}`", cx.tcx.item_name(before_item.owner_id)),
         );
     }
 
     /// Produces a linting warning for incorrectly ordered item members.
-    fn lint_member_name<T: LintContext>(cx: &T, ident: &rustc_span::Ident, before_ident: &rustc_span::Ident) {
+    fn lint_member_name<T: LintContext>(cx: &T, ident: Ident, before_ident: Ident) {
         span_lint_and_note(
             cx,
             ARBITRARY_SOURCE_ITEM_ORDERING,
@@ -220,7 +222,7 @@ impl ArbitrarySourceItemOrdering {
         );
     }
 
-    fn lint_member_item<T: LintContext>(cx: &T, item: &Item<'_>, before_item: &Item<'_>, msg: &'static str) {
+    fn lint_member_item(cx: &LateContext<'_>, item: &Item<'_>, before_item: &Item<'_>, msg: &'static str) {
         let span = if let Some(ident) = item.kind.ident() {
             ident.span
         } else {
@@ -245,17 +247,17 @@ impl ArbitrarySourceItemOrdering {
     }
 
     /// Produces a linting warning for incorrectly ordered trait items.
-    fn lint_trait_item<T: LintContext>(&self, cx: &T, item: &TraitItemRef, before_item: &TraitItemRef) {
+    fn lint_trait_item(&self, cx: &LateContext<'_>, item: TraitItemId, before_item: TraitItemId) {
         span_lint_and_note(
             cx,
             ARBITRARY_SOURCE_ITEM_ORDERING,
-            item.span,
+            cx.tcx.def_span(item.owner_id),
             format!(
                 "incorrect ordering of trait items (defined order: {:?})",
                 self.assoc_types_order
             ),
-            Some(before_item.span),
-            format!("should be placed before `{}`", before_item.ident.name),
+            Some(cx.tcx.def_span(before_item.owner_id)),
+            format!("should be placed before `{}`", cx.tcx.item_name(before_item.owner_id)),
         );
     }
 }
@@ -266,7 +268,7 @@ impl<'tcx> LateLintPass<'tcx> for ArbitrarySourceItemOrdering {
             .tcx
             .hir_attrs(item.hir_id())
             .iter()
-            .any(|attr| matches!(attr, Attribute::Parsed(AttributeKind::Repr{ .. })))
+            .any(|attr| matches!(attr, Attribute::Parsed(AttributeKind::Repr { .. })))
         {
             // Do not lint items with a `#[repr]` attribute as their layout may be imposed by an external API.
             return;
@@ -283,7 +285,7 @@ impl<'tcx> LateLintPass<'tcx> for ArbitrarySourceItemOrdering {
                         && cur_v.ident.name.as_str() > variant.ident.name.as_str()
                         && cur_v.span != variant.span
                     {
-                        Self::lint_member_name(cx, &variant.ident, &cur_v.ident);
+                        Self::lint_member_name(cx, variant.ident, cur_v.ident);
                     }
                     cur_v = Some(variant);
                 }
@@ -299,57 +301,61 @@ impl<'tcx> LateLintPass<'tcx> for ArbitrarySourceItemOrdering {
                         && cur_f.ident.name.as_str() > field.ident.name.as_str()
                         && cur_f.span != field.span
                     {
-                        Self::lint_member_name(cx, &field.ident, &cur_f.ident);
+                        Self::lint_member_name(cx, field.ident, cur_f.ident);
                     }
                     cur_f = Some(field);
                 }
             },
-            ItemKind::Trait(is_auto, _safety, _ident, _generics, _generic_bounds, item_ref)
+            ItemKind::Trait(_constness, is_auto, _safety, _ident, _generics, _generic_bounds, item_ref)
                 if self.enable_ordering_for_trait && *is_auto == IsAuto::No =>
             {
-                let mut cur_t: Option<&TraitItemRef> = None;
+                let mut cur_t: Option<(TraitItemId, Ident)> = None;
 
-                for item in *item_ref {
-                    if item.span.in_external_macro(cx.sess().source_map()) {
+                for &item in *item_ref {
+                    let span = cx.tcx.def_span(item.owner_id);
+                    let ident = cx.tcx.item_ident(item.owner_id);
+                    if span.in_external_macro(cx.sess().source_map()) {
                         continue;
                     }
 
-                    if let Some(cur_t) = cur_t {
-                        let cur_t_kind = convert_assoc_item_kind(cur_t.kind);
+                    if let Some((cur_t, cur_ident)) = cur_t {
+                        let cur_t_kind = convert_assoc_item_kind(cx, cur_t.owner_id);
                         let cur_t_kind_index = self.assoc_types_order.index_of(&cur_t_kind);
-                        let item_kind = convert_assoc_item_kind(item.kind);
+                        let item_kind = convert_assoc_item_kind(cx, item.owner_id);
                         let item_kind_index = self.assoc_types_order.index_of(&item_kind);
 
-                        if cur_t_kind == item_kind && cur_t.ident.name.as_str() > item.ident.name.as_str() {
-                            Self::lint_member_name(cx, &item.ident, &cur_t.ident);
+                        if cur_t_kind == item_kind && cur_ident.name.as_str() > ident.name.as_str() {
+                            Self::lint_member_name(cx, ident, cur_ident);
                         } else if cur_t_kind_index > item_kind_index {
                             self.lint_trait_item(cx, item, cur_t);
                         }
                     }
-                    cur_t = Some(item);
+                    cur_t = Some((item, ident));
                 }
             },
             ItemKind::Impl(trait_impl) if self.enable_ordering_for_impl => {
-                let mut cur_t: Option<&ImplItemRef> = None;
+                let mut cur_t: Option<(ImplItemId, Ident)> = None;
 
-                for item in trait_impl.items {
-                    if item.span.in_external_macro(cx.sess().source_map()) {
+                for &item in trait_impl.items {
+                    let span = cx.tcx.def_span(item.owner_id);
+                    let ident = cx.tcx.item_ident(item.owner_id);
+                    if span.in_external_macro(cx.sess().source_map()) {
                         continue;
                     }
 
-                    if let Some(cur_t) = cur_t {
-                        let cur_t_kind = convert_assoc_item_kind(cur_t.kind);
+                    if let Some((cur_t, cur_ident)) = cur_t {
+                        let cur_t_kind = convert_assoc_item_kind(cx, cur_t.owner_id);
                         let cur_t_kind_index = self.assoc_types_order.index_of(&cur_t_kind);
-                        let item_kind = convert_assoc_item_kind(item.kind);
+                        let item_kind = convert_assoc_item_kind(cx, item.owner_id);
                         let item_kind_index = self.assoc_types_order.index_of(&item_kind);
 
-                        if cur_t_kind == item_kind && cur_t.ident.name.as_str() > item.ident.name.as_str() {
-                            Self::lint_member_name(cx, &item.ident, &cur_t.ident);
+                        if cur_t_kind == item_kind && cur_ident.name.as_str() > ident.name.as_str() {
+                            Self::lint_member_name(cx, ident, cur_ident);
                         } else if cur_t_kind_index > item_kind_index {
                             self.lint_impl_item(cx, item, cur_t);
                         }
                     }
-                    cur_t = Some(item);
+                    cur_t = Some((item, ident));
                 }
             },
             _ => {}, // Catch-all for `ItemKinds` that don't have fields.
@@ -458,18 +464,19 @@ impl<'tcx> LateLintPass<'tcx> for ArbitrarySourceItemOrdering {
     }
 }
 
-/// Converts a [`rustc_hir::AssocItemKind`] to a
-/// [`SourceItemOrderingTraitAssocItemKind`].
+/// Converts a [`ty::AssocKind`] to a [`SourceItemOrderingTraitAssocItemKind`].
 ///
 /// This is implemented here because `rustc_hir` is not a dependency of
 /// `clippy_config`.
-fn convert_assoc_item_kind(value: AssocItemKind) -> SourceItemOrderingTraitAssocItemKind {
+fn convert_assoc_item_kind(cx: &LateContext<'_>, owner_id: OwnerId) -> SourceItemOrderingTraitAssocItemKind {
+    let kind = cx.tcx.associated_item(owner_id.def_id).kind;
+
     #[allow(clippy::enum_glob_use)] // Very local glob use for legibility.
     use SourceItemOrderingTraitAssocItemKind::*;
-    match value {
-        AssocItemKind::Const => Const,
-        AssocItemKind::Type => Type,
-        AssocItemKind::Fn { .. } => Fn,
+    match kind {
+        AssocKind::Const{..} => Const,
+        AssocKind::Type {..}=> Type,
+        AssocKind::Fn { .. } => Fn,
     }
 }
 
diff --git a/src/tools/clippy/clippy_lints/src/booleans.rs b/src/tools/clippy/clippy_lints/src/booleans.rs
index bf43234ff50..61c2fc49bd7 100644
--- a/src/tools/clippy/clippy_lints/src/booleans.rs
+++ b/src/tools/clippy/clippy_lints/src/booleans.rs
@@ -1,5 +1,6 @@
 use clippy_config::Conf;
 use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_hir_and_then};
+use clippy_utils::higher::has_let_expr;
 use clippy_utils::msrvs::{self, Msrv};
 use clippy_utils::source::SpanRangeExt;
 use clippy_utils::sugg::Sugg;
@@ -646,7 +647,9 @@ impl<'tcx> Visitor<'tcx> for NonminimalBoolVisitor<'_, 'tcx> {
     fn visit_expr(&mut self, e: &'tcx Expr<'_>) {
         if !e.span.from_expansion() {
             match &e.kind {
-                ExprKind::Binary(binop, _, _) if binop.node == BinOpKind::Or || binop.node == BinOpKind::And => {
+                ExprKind::Binary(binop, _, _)
+                    if binop.node == BinOpKind::Or || binop.node == BinOpKind::And && !has_let_expr(e) =>
+                {
                     self.bool_expr(e);
                 },
                 ExprKind::Unary(UnOp::Not, inner) => {
diff --git a/src/tools/clippy/clippy_lints/src/casts/borrow_as_ptr.rs b/src/tools/clippy/clippy_lints/src/casts/borrow_as_ptr.rs
index ad0a4f8cdf3..e3b125a8d5b 100644
--- a/src/tools/clippy/clippy_lints/src/casts/borrow_as_ptr.rs
+++ b/src/tools/clippy/clippy_lints/src/casts/borrow_as_ptr.rs
@@ -18,7 +18,8 @@ pub(super) fn check<'tcx>(
     cast_to: &'tcx Ty<'_>,
     msrv: Msrv,
 ) -> bool {
-    if matches!(cast_to.kind, TyKind::Ptr(_))
+    if let TyKind::Ptr(target) = cast_to.kind
+        && !matches!(target.ty.kind, TyKind::TraitObject(..))
         && let ExprKind::AddrOf(BorrowKind::Ref, mutability, e) = cast_expr.kind
         && !is_lint_allowed(cx, BORROW_AS_PTR, expr.hir_id)
     {
diff --git a/src/tools/clippy/clippy_lints/src/casts/cast_possible_truncation.rs b/src/tools/clippy/clippy_lints/src/casts/cast_possible_truncation.rs
index a2ecb5fb44a..2eebe849232 100644
--- a/src/tools/clippy/clippy_lints/src/casts/cast_possible_truncation.rs
+++ b/src/tools/clippy/clippy_lints/src/casts/cast_possible_truncation.rs
@@ -3,7 +3,7 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_then};
 use clippy_utils::source::snippet;
 use clippy_utils::sugg::Sugg;
 use clippy_utils::ty::{get_discriminant_value, is_isize_or_usize};
-use clippy_utils::{expr_or_init, sym};
+use clippy_utils::{expr_or_init, is_in_const_context, sym};
 use rustc_abi::IntegerType;
 use rustc_errors::{Applicability, Diag};
 use rustc_hir::def::{DefKind, Res};
@@ -168,7 +168,9 @@ pub(super) fn check(
 
     span_lint_and_then(cx, CAST_POSSIBLE_TRUNCATION, expr.span, msg, |diag| {
         diag.help("if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...");
-        if !cast_from.is_floating_point() {
+        // TODO: Remove the condition for const contexts when `try_from` and other commonly used methods
+        // become const fn.
+        if !is_in_const_context(cx) && !cast_from.is_floating_point() {
             offer_suggestion(cx, expr, cast_expr, cast_to_span, diag);
         }
     });
diff --git a/src/tools/clippy/clippy_lints/src/casts/mod.rs b/src/tools/clippy/clippy_lints/src/casts/mod.rs
index daae9a8bb08..37accff5eaa 100644
--- a/src/tools/clippy/clippy_lints/src/casts/mod.rs
+++ b/src/tools/clippy/clippy_lints/src/casts/mod.rs
@@ -878,7 +878,7 @@ impl<'tcx> LateLintPass<'tcx> for Casts {
             confusing_method_to_numeric_cast::check(cx, expr, cast_from_expr, cast_from, cast_to);
             fn_to_numeric_cast::check(cx, expr, cast_from_expr, cast_from, cast_to);
             fn_to_numeric_cast_with_truncation::check(cx, expr, cast_from_expr, cast_from, cast_to);
-            zero_ptr::check(cx, expr, cast_from_expr, cast_to_hir);
+            zero_ptr::check(cx, expr, cast_from_expr, cast_to_hir, self.msrv);
 
             if self.msrv.meets(cx, msrvs::MANUAL_DANGLING_PTR) {
                 manual_dangling_ptr::check(cx, expr, cast_from_expr, cast_to_hir);
diff --git a/src/tools/clippy/clippy_lints/src/casts/zero_ptr.rs b/src/tools/clippy/clippy_lints/src/casts/zero_ptr.rs
index a34af6bc226..f4738e7b0d5 100644
--- a/src/tools/clippy/clippy_lints/src/casts/zero_ptr.rs
+++ b/src/tools/clippy/clippy_lints/src/casts/zero_ptr.rs
@@ -1,4 +1,5 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
+use clippy_utils::msrvs::{self, Msrv};
 use clippy_utils::source::SpanRangeExt;
 use clippy_utils::{is_in_const_context, is_integer_literal, std_or_core};
 use rustc_errors::Applicability;
@@ -7,10 +8,10 @@ use rustc_lint::LateContext;
 
 use super::ZERO_PTR;
 
-pub fn check(cx: &LateContext<'_>, expr: &Expr<'_>, from: &Expr<'_>, to: &Ty<'_>) {
+pub fn check(cx: &LateContext<'_>, expr: &Expr<'_>, from: &Expr<'_>, to: &Ty<'_>, msrv: Msrv) {
     if let TyKind::Ptr(ref mut_ty) = to.kind
         && is_integer_literal(from, 0)
-        && !is_in_const_context(cx)
+        && (!is_in_const_context(cx) || msrv.meets(cx, msrvs::PTR_NULL))
         && let Some(std_or_core) = std_or_core(cx)
     {
         let (msg, sugg_fn) = match mut_ty.mutbl {
diff --git a/src/tools/clippy/clippy_lints/src/coerce_container_to_any.rs b/src/tools/clippy/clippy_lints/src/coerce_container_to_any.rs
index 2b659253763..6217fc4c897 100644
--- a/src/tools/clippy/clippy_lints/src/coerce_container_to_any.rs
+++ b/src/tools/clippy/clippy_lints/src/coerce_container_to_any.rs
@@ -1,9 +1,10 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
-use clippy_utils::source::snippet;
+use clippy_utils::sugg::{self, Sugg};
 use clippy_utils::sym;
 use rustc_errors::Applicability;
 use rustc_hir::{Expr, ExprKind};
 use rustc_lint::{LateContext, LateLintPass};
+use rustc_middle::ty::adjustment::{Adjust, PointerCoercion};
 use rustc_middle::ty::{self, ExistentialPredicate, Ty, TyCtxt};
 use rustc_session::declare_lint_pass;
 
@@ -49,23 +50,18 @@ declare_lint_pass!(CoerceContainerToAny => [COERCE_CONTAINER_TO_ANY]);
 
 impl<'tcx> LateLintPass<'tcx> for CoerceContainerToAny {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) {
-        // If this expression has an effective type of `&dyn Any` ...
-        {
-            let coerced_ty = cx.typeck_results().expr_ty_adjusted(e);
-
-            let ty::Ref(_, coerced_ref_ty, _) = *coerced_ty.kind() else {
-                return;
-            };
-            if !is_dyn_any(cx.tcx, coerced_ref_ty) {
-                return;
-            }
+        // If this expression was coerced to `&dyn Any` ...
+        if !cx.typeck_results().expr_adjustments(e).last().is_some_and(|adj| {
+            matches!(adj.kind, Adjust::Pointer(PointerCoercion::Unsize)) && is_ref_dyn_any(cx.tcx, adj.target)
+        }) {
+            return;
         }
 
         let expr_ty = cx.typeck_results().expr_ty(e);
         let ty::Ref(_, expr_ref_ty, _) = *expr_ty.kind() else {
             return;
         };
-        // ... but only due to coercion ...
+        // ... but it's not actually `&dyn Any` ...
         if is_dyn_any(cx.tcx, expr_ref_ty) {
             return;
         }
@@ -78,23 +74,37 @@ impl<'tcx> LateLintPass<'tcx> for CoerceContainerToAny {
         }
 
         // ... that's probably not intended.
-        let (span, deref_count) = match e.kind {
+        let (target_expr, deref_count) = match e.kind {
             // If `e` was already an `&` expression, skip `*&` in the suggestion
-            ExprKind::AddrOf(_, _, referent) => (referent.span, depth),
-            _ => (e.span, depth + 1),
+            ExprKind::AddrOf(_, _, referent) => (referent, depth),
+            _ => (e, depth + 1),
         };
+        let ty::Ref(_, _, mutability) = *cx.typeck_results().expr_ty_adjusted(e).kind() else {
+            return;
+        };
+        let sugg = sugg::make_unop(
+            &format!("{}{}", mutability.ref_prefix_str(), str::repeat("*", deref_count)),
+            Sugg::hir(cx, target_expr, ".."),
+        );
         span_lint_and_sugg(
             cx,
             COERCE_CONTAINER_TO_ANY,
             e.span,
-            format!("coercing `{expr_ty}` to `&dyn Any`"),
+            format!("coercing `{expr_ty}` to `{}dyn Any`", mutability.ref_prefix_str()),
             "consider dereferencing",
-            format!("&{}{}", str::repeat("*", deref_count), snippet(cx, span, "x")),
+            sugg.to_string(),
             Applicability::MaybeIncorrect,
         );
     }
 }
 
+fn is_ref_dyn_any(tcx: TyCtxt<'_>, ty: Ty<'_>) -> bool {
+    let ty::Ref(_, ref_ty, _) = *ty.kind() else {
+        return false;
+    };
+    is_dyn_any(tcx, ref_ty)
+}
+
 fn is_dyn_any(tcx: TyCtxt<'_>, ty: Ty<'_>) -> bool {
     let ty::Dynamic(traits, ..) = ty.kind() else {
         return false;
diff --git a/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs b/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs
index 5c64216dd92..d5d937d9133 100644
--- a/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs
+++ b/src/tools/clippy/clippy_lints/src/cognitive_complexity.rs
@@ -14,18 +14,25 @@ use rustc_span::def_id::LocalDefId;
 
 declare_clippy_lint! {
     /// ### What it does
-    /// Checks for methods with high cognitive complexity.
+    /// We used to think it measured how hard a method is to understand.
     ///
     /// ### Why is this bad?
-    /// Methods of high cognitive complexity tend to be hard to
-    /// both read and maintain. Also LLVM will tend to optimize small methods better.
+    /// Ideally, we would like to be able to measure how hard a function is
+    /// to understand given its context (what we call its Cognitive Complexity).
+    /// But that's not what this lint does. See "Known problems"
     ///
     /// ### Known problems
-    /// Sometimes it's hard to find a way to reduce the
-    /// complexity.
+    /// The true Cognitive Complexity of a method is not something we can
+    /// calculate using modern technology. This lint has been left in the
+    /// `nursery` so as to not mislead users into using this lint as a
+    /// measurement tool.
     ///
-    /// ### Example
-    /// You'll see it when you get the warning.
+    /// For more detailed information, see [rust-clippy#3793](https://github.com/rust-lang/rust-clippy/issues/3793)
+    ///
+    /// ### Lints to consider instead of this
+    ///
+    /// * [`excessive_nesting`](https://rust-lang.github.io/rust-clippy/master/index.html#excessive_nesting)
+    /// * [`too_many_lines`](https://rust-lang.github.io/rust-clippy/master/index.html#too_many_lines)
     #[clippy::version = "1.35.0"]
     pub COGNITIVE_COMPLEXITY,
     nursery,
diff --git a/src/tools/clippy/clippy_lints/src/derivable_impls.rs b/src/tools/clippy/clippy_lints/src/derivable_impls.rs
index 10331b3855b..0a481ddcd12 100644
--- a/src/tools/clippy/clippy_lints/src/derivable_impls.rs
+++ b/src/tools/clippy/clippy_lints/src/derivable_impls.rs
@@ -192,7 +192,7 @@ impl<'tcx> LateLintPass<'tcx> for DerivableImpls {
             && !item.span.from_expansion()
             && let Some(def_id) = trait_ref.trait_def_id()
             && cx.tcx.is_diagnostic_item(sym::Default, def_id)
-            && let impl_item_hir = child.id.hir_id()
+            && let impl_item_hir = child.hir_id()
             && let Node::ImplItem(impl_item) = cx.tcx.hir_node(impl_item_hir)
             && let ImplItemKind::Fn(_, b) = &impl_item.kind
             && let Body { value: func_expr, .. } = cx.tcx.hir_body(*b)
diff --git a/src/tools/clippy/clippy_lints/src/disallowed_script_idents.rs b/src/tools/clippy/clippy_lints/src/disallowed_script_idents.rs
index d1a8590c59b..cf964d4b580 100644
--- a/src/tools/clippy/clippy_lints/src/disallowed_script_idents.rs
+++ b/src/tools/clippy/clippy_lints/src/disallowed_script_idents.rs
@@ -89,6 +89,10 @@ impl EarlyLintPass for DisallowedScriptIdents {
             // Fast path for ascii-only idents.
             if !symbol_str.is_ascii()
                 && let Some(script) = symbol_str.chars().find_map(|c| {
+                    if c.is_ascii() {
+                        return None;
+                    }
+
                     c.script_extension()
                         .iter()
                         .find(|script| !self.whitelist.contains(script))
diff --git a/src/tools/clippy/clippy_lints/src/doc/missing_headers.rs b/src/tools/clippy/clippy_lints/src/doc/missing_headers.rs
index 9ee32fced8c..3033ac0d0b0 100644
--- a/src/tools/clippy/clippy_lints/src/doc/missing_headers.rs
+++ b/src/tools/clippy/clippy_lints/src/doc/missing_headers.rs
@@ -3,7 +3,7 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_note};
 use clippy_utils::macros::{is_panic, root_macro_call_first_node};
 use clippy_utils::ty::{get_type_diagnostic_name, implements_trait_with_env, is_type_diagnostic_item};
 use clippy_utils::visitors::for_each_expr;
-use clippy_utils::{fulfill_or_allowed, is_doc_hidden, method_chain_args, return_ty};
+use clippy_utils::{fulfill_or_allowed, is_doc_hidden, is_inside_always_const_context, method_chain_args, return_ty};
 use rustc_hir::{BodyId, FnSig, OwnerId, Safety};
 use rustc_lint::LateContext;
 use rustc_middle::ty;
@@ -99,13 +99,16 @@ fn find_panic(cx: &LateContext<'_>, body_id: BodyId) -> Option<Span> {
     let mut panic_span = None;
     let typeck = cx.tcx.typeck_body(body_id);
     for_each_expr(cx, cx.tcx.hir_body(body_id), |expr| {
+        if is_inside_always_const_context(cx.tcx, expr.hir_id) {
+            return ControlFlow::<!>::Continue(());
+        }
+
         if let Some(macro_call) = root_macro_call_first_node(cx, expr)
             && (is_panic(cx, macro_call.def_id)
                 || matches!(
                     cx.tcx.get_diagnostic_name(macro_call.def_id),
                     Some(sym::assert_macro | sym::assert_eq_macro | sym::assert_ne_macro)
                 ))
-            && !cx.tcx.hir_is_inside_const_context(expr.hir_id)
             && !fulfill_or_allowed(cx, MISSING_PANICS_DOC, [expr.hir_id])
             && panic_span.is_none()
         {
diff --git a/src/tools/clippy/clippy_lints/src/doc/mod.rs b/src/tools/clippy/clippy_lints/src/doc/mod.rs
index 5ea55e102df..22b781b8929 100644
--- a/src/tools/clippy/clippy_lints/src/doc/mod.rs
+++ b/src/tools/clippy/clippy_lints/src/doc/mod.rs
@@ -740,7 +740,7 @@ impl<'tcx> LateLintPass<'tcx> for Documentation {
                             );
                         }
                     },
-                    ItemKind::Trait(_, unsafety, ..) => match (headers.safety, unsafety) {
+                    ItemKind::Trait(_, _, unsafety, ..) => match (headers.safety, unsafety) {
                         (false, Safety::Unsafe) => span_lint(
                             cx,
                             MISSING_SAFETY_DOC,
@@ -1249,7 +1249,9 @@ fn looks_like_refdef(doc: &str, range: Range<usize>) -> Option<Range<usize>> {
             b'[' => {
                 start = Some(i + offset);
             },
-            b']' if let Some(start) = start => {
+            b']' if let Some(start) = start
+                && doc.as_bytes().get(i + offset + 1) == Some(&b':') =>
+            {
                 return Some(start..i + offset + 1);
             },
             _ => {},
diff --git a/src/tools/clippy/clippy_lints/src/empty_drop.rs b/src/tools/clippy/clippy_lints/src/empty_drop.rs
index d557a36c7ac..4e948701da4 100644
--- a/src/tools/clippy/clippy_lints/src/empty_drop.rs
+++ b/src/tools/clippy/clippy_lints/src/empty_drop.rs
@@ -41,7 +41,7 @@ impl LateLintPass<'_> for EmptyDrop {
             ..
         }) = item.kind
             && trait_ref.trait_def_id() == cx.tcx.lang_items().drop_trait()
-            && let impl_item_hir = child.id.hir_id()
+            && let impl_item_hir = child.hir_id()
             && let Node::ImplItem(impl_item) = cx.tcx.hir_node(impl_item_hir)
             && let ImplItemKind::Fn(_, b) = &impl_item.kind
             && let Body { value: func_expr, .. } = cx.tcx.hir_body(*b)
diff --git a/src/tools/clippy/clippy_lints/src/escape.rs b/src/tools/clippy/clippy_lints/src/escape.rs
index 2cb3b32babe..db2fea1aae9 100644
--- a/src/tools/clippy/clippy_lints/src/escape.rs
+++ b/src/tools/clippy/clippy_lints/src/escape.rs
@@ -1,7 +1,8 @@
 use clippy_config::Conf;
 use clippy_utils::diagnostics::span_lint_hir;
 use rustc_abi::ExternAbi;
-use rustc_hir::{AssocItemKind, Body, FnDecl, HirId, HirIdSet, Impl, ItemKind, Node, Pat, PatKind, intravisit};
+use rustc_hir::{Body, FnDecl, HirId, HirIdSet, Node, Pat, PatKind, intravisit};
+use rustc_hir::def::DefKind;
 use rustc_hir_typeck::expr_use_visitor::{Delegate, ExprUseVisitor, PlaceBase, PlaceWithHirId};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::mir::FakeReadCause;
@@ -84,23 +85,18 @@ impl<'tcx> LateLintPass<'tcx> for BoxedLocal {
             .def_id;
 
         let mut trait_self_ty = None;
-        if let Node::Item(item) = cx.tcx.hir_node_by_def_id(parent_id) {
+        match cx.tcx.def_kind(parent_id) {
             // If the method is an impl for a trait, don't warn.
-            if let ItemKind::Impl(Impl { of_trait: Some(_), .. }) = item.kind {
-                return;
+            DefKind::Impl { of_trait: true } => {
+                return
             }
 
             // find `self` ty for this trait if relevant
-            if let ItemKind::Trait(_, _, _, _, _, items) = item.kind {
-                for trait_item in items {
-                    if trait_item.id.owner_id.def_id == fn_def_id
-                        // be sure we have `self` parameter in this function
-                        && trait_item.kind == (AssocItemKind::Fn { has_self: true })
-                    {
-                        trait_self_ty = Some(TraitRef::identity(cx.tcx, trait_item.id.owner_id.to_def_id()).self_ty());
-                    }
-                }
+            DefKind::Trait => {
+                trait_self_ty = Some(TraitRef::identity(cx.tcx, parent_id.to_def_id()).self_ty());
             }
+
+            _ => {}
         }
 
         let mut v = EscapeDelegate {
diff --git a/src/tools/clippy/clippy_lints/src/exhaustive_items.rs b/src/tools/clippy/clippy_lints/src/exhaustive_items.rs
index 7dda3e0fdb9..8ad09279071 100644
--- a/src/tools/clippy/clippy_lints/src/exhaustive_items.rs
+++ b/src/tools/clippy/clippy_lints/src/exhaustive_items.rs
@@ -1,12 +1,10 @@
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::source::indent_of;
+use rustc_attr_data_structures::{AttributeKind, find_attr};
 use rustc_errors::Applicability;
 use rustc_hir::{Item, ItemKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::declare_lint_pass;
-use rustc_attr_data_structures::AttributeKind;
-use rustc_attr_data_structures::find_attr;
-
 
 declare_clippy_lint! {
     /// ### What it does
diff --git a/src/tools/clippy/clippy_lints/src/exit.rs b/src/tools/clippy/clippy_lints/src/exit.rs
index cc8e4d7d9e2..487db69027a 100644
--- a/src/tools/clippy/clippy_lints/src/exit.rs
+++ b/src/tools/clippy/clippy_lints/src/exit.rs
@@ -1,5 +1,4 @@
 use clippy_utils::diagnostics::span_lint;
-use clippy_utils::is_entrypoint_fn;
 use rustc_hir::{Expr, ExprKind, Item, ItemKind, OwnerNode};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::declare_lint_pass;
@@ -7,7 +6,8 @@ use rustc_span::sym;
 
 declare_clippy_lint! {
     /// ### What it does
-    /// Detects calls to the `exit()` function which terminates the program.
+    /// Detects calls to the `exit()` function that are not in the `main` function. Calls to `exit()`
+    /// immediately terminate the program.
     ///
     /// ### Why restrict this?
     /// `exit()` immediately terminates the program with no information other than an exit code.
@@ -15,11 +15,24 @@ declare_clippy_lint! {
     ///
     /// Codebases may use this lint to require that all exits are performed either by panicking
     /// (which produces a message, a code location, and optionally a backtrace)
-    /// or by returning from `main()` (which is a single place to look).
+    /// or by calling `exit()` from `main()` (which is a single place to look).
     ///
-    /// ### Example
+    /// ### Good example
     /// ```no_run
-    /// std::process::exit(0)
+    /// fn main() {
+    ///     std::process::exit(0);
+    /// }
+    /// ```
+    ///
+    /// ### Bad example
+    /// ```no_run
+    /// fn main() {
+    ///     other_function();
+    /// }
+    ///
+    /// fn other_function() {
+    ///     std::process::exit(0);
+    /// }
     /// ```
     ///
     /// Use instead:
@@ -36,7 +49,7 @@ declare_clippy_lint! {
     #[clippy::version = "1.41.0"]
     pub EXIT,
     restriction,
-    "detects `std::process::exit` calls"
+    "detects `std::process::exit` calls outside of `main`"
 }
 
 declare_lint_pass!(Exit => [EXIT]);
@@ -48,10 +61,14 @@ impl<'tcx> LateLintPass<'tcx> for Exit {
             && let Some(def_id) = cx.qpath_res(path, path_expr.hir_id).opt_def_id()
             && cx.tcx.is_diagnostic_item(sym::process_exit, def_id)
             && let parent = cx.tcx.hir_get_parent_item(e.hir_id)
-            && let OwnerNode::Item(Item{kind: ItemKind::Fn{ .. }, ..}) = cx.tcx.hir_owner_node(parent)
-            // If the next item up is a function we check if it is an entry point
+            && let OwnerNode::Item(Item{kind: ItemKind::Fn{ ident, .. }, ..}) = cx.tcx.hir_owner_node(parent)
+            // If the next item up is a function we check if it isn't named "main"
             // and only then emit a linter warning
-            && !is_entrypoint_fn(cx, parent.to_def_id())
+
+            // if you instead check for the parent of the `exit()` call being the entrypoint function, as this worked before,
+            // in compilation contexts like --all-targets (which include --tests), you get false positives
+            // because in a test context, main is not the entrypoint function
+            && ident.name != sym::main
         {
             span_lint(cx, EXIT, e.span, "usage of `process::exit`");
         }
diff --git a/src/tools/clippy/clippy_lints/src/fallible_impl_from.rs b/src/tools/clippy/clippy_lints/src/fallible_impl_from.rs
index 68d0cd19c8a..552cd721f4e 100644
--- a/src/tools/clippy/clippy_lints/src/fallible_impl_from.rs
+++ b/src/tools/clippy/clippy_lints/src/fallible_impl_from.rs
@@ -52,20 +52,20 @@ declare_lint_pass!(FallibleImplFrom => [FALLIBLE_IMPL_FROM]);
 impl<'tcx> LateLintPass<'tcx> for FallibleImplFrom {
     fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_>) {
         // check for `impl From<???> for ..`
-        if let hir::ItemKind::Impl(impl_) = &item.kind
+        if let hir::ItemKind::Impl(_) = &item.kind
             && let Some(impl_trait_ref) = cx.tcx.impl_trait_ref(item.owner_id)
             && cx
                 .tcx
                 .is_diagnostic_item(sym::From, impl_trait_ref.skip_binder().def_id)
         {
-            lint_impl_body(cx, item.span, impl_.items);
+            lint_impl_body(cx, item.owner_id, item.span);
         }
     }
 }
 
-fn lint_impl_body(cx: &LateContext<'_>, impl_span: Span, impl_items: &[hir::ImplItemRef]) {
+fn lint_impl_body(cx: &LateContext<'_>, item_def_id: hir::OwnerId, impl_span: Span) {
     use rustc_hir::intravisit::{self, Visitor};
-    use rustc_hir::{Expr, ImplItemKind};
+    use rustc_hir::Expr;
 
     struct FindPanicUnwrap<'a, 'tcx> {
         lcx: &'a LateContext<'tcx>,
@@ -96,35 +96,35 @@ fn lint_impl_body(cx: &LateContext<'_>, impl_span: Span, impl_items: &[hir::Impl
         }
     }
 
-    for impl_item in impl_items {
-        if impl_item.ident.name == sym::from
-            && let ImplItemKind::Fn(_, body_id) = cx.tcx.hir_impl_item(impl_item.id).kind
-        {
-            // check the body for `begin_panic` or `unwrap`
-            let body = cx.tcx.hir_body(body_id);
-            let mut fpu = FindPanicUnwrap {
-                lcx: cx,
-                typeck_results: cx.tcx.typeck(impl_item.id.owner_id.def_id),
-                result: Vec::new(),
-            };
-            fpu.visit_expr(body.value);
+    for impl_item in cx.tcx.associated_items(item_def_id)
+        .filter_by_name_unhygienic_and_kind(sym::from, ty::AssocTag::Fn)
+    {
+        let impl_item_def_id= impl_item.def_id.expect_local();
 
-            // if we've found one, lint
-            if !fpu.result.is_empty() {
-                span_lint_and_then(
-                    cx,
-                    FALLIBLE_IMPL_FROM,
-                    impl_span,
-                    "consider implementing `TryFrom` instead",
-                    move |diag| {
-                        diag.help(
-                            "`From` is intended for infallible conversions only. \
-                            Use `TryFrom` if there's a possibility for the conversion to fail",
-                        );
-                        diag.span_note(fpu.result, "potential failure(s)");
-                    },
-                );
-            }
+        // check the body for `begin_panic` or `unwrap`
+        let body = cx.tcx.hir_body_owned_by(impl_item_def_id);
+        let mut fpu = FindPanicUnwrap {
+            lcx: cx,
+            typeck_results: cx.tcx.typeck(impl_item_def_id),
+            result: Vec::new(),
+        };
+        fpu.visit_expr(body.value);
+
+        // if we've found one, lint
+        if !fpu.result.is_empty() {
+            span_lint_and_then(
+                cx,
+                FALLIBLE_IMPL_FROM,
+                impl_span,
+                "consider implementing `TryFrom` instead",
+                move |diag| {
+                    diag.help(
+                        "`From` is intended for infallible conversions only. \
+                        Use `TryFrom` if there's a possibility for the conversion to fail",
+                    );
+                    diag.span_note(fpu.result, "potential failure(s)");
+                },
+            );
         }
     }
 }
diff --git a/src/tools/clippy/clippy_lints/src/floating_point_arithmetic.rs b/src/tools/clippy/clippy_lints/src/floating_point_arithmetic.rs
index b3c9e860758..d5abaa547e8 100644
--- a/src/tools/clippy/clippy_lints/src/floating_point_arithmetic.rs
+++ b/src/tools/clippy/clippy_lints/src/floating_point_arithmetic.rs
@@ -2,8 +2,8 @@ use clippy_utils::consts::Constant::{F32, F64, Int};
 use clippy_utils::consts::{ConstEvalCtxt, Constant};
 use clippy_utils::diagnostics::span_lint_and_sugg;
 use clippy_utils::{
-    eq_expr_value, get_parent_expr, higher, is_in_const_context, is_inherent_method_call, is_no_std_crate,
-    numeric_literal, peel_blocks, sugg, sym,
+    eq_expr_value, get_parent_expr, has_ambiguous_literal_in_expr, higher, is_in_const_context,
+    is_inherent_method_call, is_no_std_crate, numeric_literal, peel_blocks, sugg, sym,
 };
 use rustc_ast::ast;
 use rustc_errors::Applicability;
@@ -455,7 +455,6 @@ fn is_float_mul_expr<'a>(cx: &LateContext<'_>, expr: &'a Expr<'a>) -> Option<(&'
     None
 }
 
-// TODO: Fix rust-lang/rust-clippy#4735
 fn check_mul_add(cx: &LateContext<'_>, expr: &Expr<'_>) {
     if let ExprKind::Binary(
         Spanned {
@@ -491,6 +490,14 @@ fn check_mul_add(cx: &LateContext<'_>, expr: &Expr<'_>) {
             return;
         };
 
+        // Check if any variable in the expression has an ambiguous type (could be f32 or f64)
+        // see: https://github.com/rust-lang/rust-clippy/issues/14897
+        if (matches!(recv.kind, ExprKind::Path(_)) || matches!(recv.kind, ExprKind::Call(_, _)))
+            && has_ambiguous_literal_in_expr(cx, recv)
+        {
+            return;
+        }
+
         span_lint_and_sugg(
             cx,
             SUBOPTIMAL_FLOPS,
diff --git a/src/tools/clippy/clippy_lints/src/format_args.rs b/src/tools/clippy/clippy_lints/src/format_args.rs
index 0c39aae9ca9..16c58ecb455 100644
--- a/src/tools/clippy/clippy_lints/src/format_args.rs
+++ b/src/tools/clippy/clippy_lints/src/format_args.rs
@@ -30,6 +30,7 @@ use rustc_span::edition::Edition::Edition2021;
 use rustc_span::{Span, Symbol, sym};
 use rustc_trait_selection::infer::TyCtxtInferExt;
 use rustc_trait_selection::traits::{Obligation, ObligationCause, Selection, SelectionContext};
+use rustc_attr_data_structures::{AttributeKind, find_attr};
 
 declare_clippy_lint! {
     /// ### What it does
@@ -656,7 +657,7 @@ impl<'tcx> FormatArgsExpr<'_, 'tcx> {
                     };
                     let selection = SelectionContext::new(&infcx).select(&obligation);
                     let derived = if let Ok(Some(Selection::UserDefined(data))) = selection {
-                        tcx.has_attr(data.impl_def_id, sym::automatically_derived)
+                        find_attr!(tcx.get_all_attrs(data.impl_def_id), AttributeKind::AutomaticallyDerived(..))
                     } else {
                         false
                     };
diff --git a/src/tools/clippy/clippy_lints/src/from_over_into.rs b/src/tools/clippy/clippy_lints/src/from_over_into.rs
index be887b03ae4..85b40ba7419 100644
--- a/src/tools/clippy/clippy_lints/src/from_over_into.rs
+++ b/src/tools/clippy/clippy_lints/src/from_over_into.rs
@@ -9,7 +9,7 @@ use clippy_utils::source::SpanRangeExt;
 use rustc_errors::Applicability;
 use rustc_hir::intravisit::{Visitor, walk_path};
 use rustc_hir::{
-    FnRetTy, GenericArg, GenericArgs, HirId, Impl, ImplItemKind, ImplItemRef, Item, ItemKind, PatKind, Path,
+    FnRetTy, GenericArg, GenericArgs, HirId, Impl, ImplItemKind, ImplItemId, Item, ItemKind, PatKind, Path,
     PathSegment, Ty, TyKind,
 };
 use rustc_lint::{LateContext, LateLintPass};
@@ -102,7 +102,7 @@ impl<'tcx> LateLintPass<'tcx> for FromOverInto {
                         middle_trait_ref.self_ty()
                     );
                     if let Some(suggestions) =
-                        convert_to_from(cx, into_trait_seg, target_ty.as_unambig_ty(), self_ty, impl_item_ref)
+                        convert_to_from(cx, into_trait_seg, target_ty.as_unambig_ty(), self_ty, *impl_item_ref)
                     {
                         diag.multipart_suggestion(message, suggestions, Applicability::MachineApplicable);
                     } else {
@@ -164,14 +164,14 @@ fn convert_to_from(
     into_trait_seg: &PathSegment<'_>,
     target_ty: &Ty<'_>,
     self_ty: &Ty<'_>,
-    impl_item_ref: &ImplItemRef,
+    impl_item_ref: ImplItemId,
 ) -> Option<Vec<(Span, String)>> {
     if !target_ty.find_self_aliases().is_empty() {
         // It's tricky to expand self-aliases correctly, we'll ignore it to not cause a
         // bad suggestion/fix.
         return None;
     }
-    let impl_item = cx.tcx.hir_impl_item(impl_item_ref.id);
+    let impl_item = cx.tcx.hir_impl_item(impl_item_ref);
     let ImplItemKind::Fn(ref sig, body_id) = impl_item.kind else {
         return None;
     };
diff --git a/src/tools/clippy/clippy_lints/src/functions/renamed_function_params.rs b/src/tools/clippy/clippy_lints/src/functions/renamed_function_params.rs
index 2d22bb157a9..0d6191f2c97 100644
--- a/src/tools/clippy/clippy_lints/src/functions/renamed_function_params.rs
+++ b/src/tools/clippy/clippy_lints/src/functions/renamed_function_params.rs
@@ -2,7 +2,7 @@ use clippy_utils::diagnostics::span_lint_and_then;
 use rustc_errors::{Applicability, MultiSpan};
 use rustc_hir::def_id::{DefId, DefIdSet};
 use rustc_hir::hir_id::OwnerId;
-use rustc_hir::{Impl, ImplItem, ImplItemKind, ImplItemRef, ItemKind, Node, TraitRef};
+use rustc_hir::{Impl, ImplItem, ImplItemKind, ItemKind, Node, TraitRef};
 use rustc_lint::LateContext;
 use rustc_span::Span;
 use rustc_span::symbol::{Ident, kw};
@@ -15,11 +15,10 @@ pub(super) fn check_impl_item(cx: &LateContext<'_>, item: &ImplItem<'_>, ignored
         && let parent_node = cx.tcx.parent_hir_node(item.hir_id())
         && let Node::Item(parent_item) = parent_node
         && let ItemKind::Impl(Impl {
-            items,
             of_trait: Some(trait_ref),
             ..
         }) = &parent_item.kind
-        && let Some(did) = trait_item_def_id_of_impl(items, item.owner_id)
+        && let Some(did) = trait_item_def_id_of_impl(cx, item.owner_id)
         && !is_from_ignored_trait(trait_ref, ignored_traits)
     {
         let mut param_idents_iter = cx.tcx.hir_body_param_idents(body_id);
@@ -93,14 +92,8 @@ impl RenamedFnArgs {
 }
 
 /// Get the [`trait_item_def_id`](ImplItemRef::trait_item_def_id) of a relevant impl item.
-fn trait_item_def_id_of_impl(items: &[ImplItemRef], target: OwnerId) -> Option<DefId> {
-    items.iter().find_map(|item| {
-        if item.id.owner_id == target {
-            item.trait_item_def_id
-        } else {
-            None
-        }
-    })
+fn trait_item_def_id_of_impl(cx: &LateContext<'_>, target: OwnerId) -> Option<DefId> {
+    cx.tcx.associated_item(target).trait_item_def_id
 }
 
 fn is_from_ignored_trait(of_trait: &TraitRef<'_>, ignored_traits: &DefIdSet) -> bool {
diff --git a/src/tools/clippy/clippy_lints/src/if_not_else.rs b/src/tools/clippy/clippy_lints/src/if_not_else.rs
index ab7a965b367..25fed0d4dd1 100644
--- a/src/tools/clippy/clippy_lints/src/if_not_else.rs
+++ b/src/tools/clippy/clippy_lints/src/if_not_else.rs
@@ -51,7 +51,6 @@ declare_lint_pass!(IfNotElse => [IF_NOT_ELSE]);
 impl LateLintPass<'_> for IfNotElse {
     fn check_expr(&mut self, cx: &LateContext<'_>, e: &Expr<'_>) {
         if let ExprKind::If(cond, cond_inner, Some(els)) = e.kind
-            && let ExprKind::DropTemps(cond) = cond.kind
             && let ExprKind::Block(..) = els.kind
         {
             let (msg, help) = match cond.kind {
diff --git a/src/tools/clippy/clippy_lints/src/implicit_hasher.rs b/src/tools/clippy/clippy_lints/src/implicit_hasher.rs
index cab7a9fb709..b3c90f364e8 100644
--- a/src/tools/clippy/clippy_lints/src/implicit_hasher.rs
+++ b/src/tools/clippy/clippy_lints/src/implicit_hasher.rs
@@ -130,7 +130,7 @@ impl<'tcx> LateLintPass<'tcx> for ImplicitHasher {
                     });
 
                     let mut ctr_vis = ImplicitHasherConstructorVisitor::new(cx, target);
-                    for item in impl_.items.iter().map(|item| cx.tcx.hir_impl_item(item.id)) {
+                    for item in impl_.items.iter().map(|&item| cx.tcx.hir_impl_item(item)) {
                         ctr_vis.visit_impl_item(item);
                     }
 
diff --git a/src/tools/clippy/clippy_lints/src/implicit_saturating_add.rs b/src/tools/clippy/clippy_lints/src/implicit_saturating_add.rs
index 185fc2aa2d4..0fdbf679738 100644
--- a/src/tools/clippy/clippy_lints/src/implicit_saturating_add.rs
+++ b/src/tools/clippy/clippy_lints/src/implicit_saturating_add.rs
@@ -41,8 +41,7 @@ declare_lint_pass!(ImplicitSaturatingAdd => [IMPLICIT_SATURATING_ADD]);
 impl<'tcx> LateLintPass<'tcx> for ImplicitSaturatingAdd {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) {
         if let ExprKind::If(cond, then, None) = expr.kind
-            && let ExprKind::DropTemps(expr1) = cond.kind
-            && let Some((c, op_node, l)) = get_const(cx, expr1)
+            && let Some((c, op_node, l)) = get_const(cx, cond)
             && let BinOpKind::Ne | BinOpKind::Lt = op_node
             && let ExprKind::Block(block, None) = then.kind
             && let Block {
@@ -66,7 +65,7 @@ impl<'tcx> LateLintPass<'tcx> for ImplicitSaturatingAdd {
             && Some(c) == get_int_max(ty)
             && let ctxt = expr.span.ctxt()
             && ex.span.ctxt() == ctxt
-            && expr1.span.ctxt() == ctxt
+            && cond.span.ctxt() == ctxt
             && clippy_utils::SpanlessEq::new(cx).eq_expr(l, target)
             && AssignOpKind::AddAssign == op1.node
             && let ExprKind::Lit(lit) = value.kind
diff --git a/src/tools/clippy/clippy_lints/src/infallible_try_from.rs b/src/tools/clippy/clippy_lints/src/infallible_try_from.rs
index b54c289fa7e..e79fcec6e6a 100644
--- a/src/tools/clippy/clippy_lints/src/infallible_try_from.rs
+++ b/src/tools/clippy/clippy_lints/src/infallible_try_from.rs
@@ -1,8 +1,9 @@
 use clippy_utils::diagnostics::span_lint;
 use clippy_utils::sym;
 use rustc_errors::MultiSpan;
-use rustc_hir::{AssocItemKind, Item, ItemKind};
+use rustc_hir::{Item, ItemKind};
 use rustc_lint::{LateContext, LateLintPass};
+use rustc_middle::ty::AssocTag;
 use rustc_session::declare_lint_pass;
 
 declare_clippy_lint! {
@@ -51,25 +52,23 @@ impl<'tcx> LateLintPass<'tcx> for InfallibleTryFrom {
         if !cx.tcx.is_diagnostic_item(sym::TryFrom, trait_def_id) {
             return;
         }
-        for ii in imp.items {
-            if ii.kind == AssocItemKind::Type {
-                let ii = cx.tcx.hir_impl_item(ii.id);
-                if ii.ident.name != sym::Error {
-                    continue;
-                }
-                let ii_ty = ii.expect_type();
-                let ii_ty_span = ii_ty.span;
-                let ii_ty = clippy_utils::ty::ty_from_hir_ty(cx, ii_ty);
-                if !ii_ty.is_inhabited_from(cx.tcx, ii.owner_id.to_def_id(), cx.typing_env()) {
-                    let mut span = MultiSpan::from_span(cx.tcx.def_span(item.owner_id.to_def_id()));
-                    span.push_span_label(ii_ty_span, "infallible error type");
-                    span_lint(
-                        cx,
-                        INFALLIBLE_TRY_FROM,
-                        span,
-                        "infallible TryFrom impl; consider implementing From, instead",
-                    );
-                }
+        for ii in cx.tcx.associated_items(item.owner_id.def_id)
+            .filter_by_name_unhygienic_and_kind(sym::Error, AssocTag::Type)
+        {
+            let ii_ty = cx.tcx.type_of(ii.def_id).instantiate_identity();
+            if !ii_ty.is_inhabited_from(cx.tcx, ii.def_id, cx.typing_env()) {
+                let mut span = MultiSpan::from_span(cx.tcx.def_span(item.owner_id.to_def_id()));
+                let ii_ty_span = cx.tcx.hir_node_by_def_id(ii.def_id.expect_local())
+                    .expect_impl_item()
+                    .expect_type()
+                    .span;
+                span.push_span_label(ii_ty_span, "infallible error type");
+                span_lint(
+                    cx,
+                    INFALLIBLE_TRY_FROM,
+                    span,
+                    "infallible TryFrom impl; consider implementing From, instead",
+                );
             }
         }
     }
diff --git a/src/tools/clippy/clippy_lints/src/iter_without_into_iter.rs b/src/tools/clippy/clippy_lints/src/iter_without_into_iter.rs
index 900b20aa9cf..03038f0ab49 100644
--- a/src/tools/clippy/clippy_lints/src/iter_without_into_iter.rs
+++ b/src/tools/clippy/clippy_lints/src/iter_without_into_iter.rs
@@ -139,13 +139,12 @@ impl LateLintPass<'_> for IterWithoutIntoIter {
                 // We can't check inherent impls for slices, but we know that they have an `iter(_mut)` method
                 ty.peel_refs().is_slice() || get_adt_inherent_method(cx, ty, expected_method_name).is_some()
             })
-            && let Some(iter_assoc_span) = imp.items.iter().find_map(|item| {
-                if item.ident.name == sym::IntoIter {
-                    Some(cx.tcx.hir_impl_item(item.id).expect_type().span)
-                } else {
-                    None
-                }
-            })
+            && let Some(iter_assoc_span) = cx.tcx.associated_items(item.owner_id)
+                .filter_by_name_unhygienic_and_kind(sym::IntoIter, ty::AssocTag::Type)
+                .next()
+                .map(|assoc_item| {
+                    cx.tcx.hir_node_by_def_id(assoc_item.def_id.expect_local()).expect_impl_item().expect_type().span
+                })
             && is_ty_exported(cx, ty)
         {
             span_lint_and_then(
diff --git a/src/tools/clippy/clippy_lints/src/len_zero.rs b/src/tools/clippy/clippy_lints/src/len_zero.rs
index aded31971ce..1bf03480c82 100644
--- a/src/tools/clippy/clippy_lints/src/len_zero.rs
+++ b/src/tools/clippy/clippy_lints/src/len_zero.rs
@@ -10,14 +10,15 @@ use rustc_errors::Applicability;
 use rustc_hir::def::Res;
 use rustc_hir::def_id::{DefId, DefIdSet};
 use rustc_hir::{
-    AssocItemKind, BinOpKind, Expr, ExprKind, FnRetTy, GenericArg, GenericBound, HirId, ImplItem, ImplItemKind,
+    BinOpKind, Expr, ExprKind, FnRetTy, GenericArg, GenericBound, HirId, ImplItem, ImplItemKind,
     ImplicitSelfKind, Item, ItemKind, Mutability, Node, OpaqueTyOrigin, PatExprKind, PatKind, PathSegment, PrimTy,
-    QPath, TraitItemRef, TyKind,
+    QPath, TraitItemId, TyKind,
 };
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty::{self, FnSig, Ty};
 use rustc_session::declare_lint_pass;
 use rustc_span::source_map::Spanned;
+use rustc_span::symbol::kw;
 use rustc_span::{Ident, Span, Symbol};
 use rustc_trait_selection::traits::supertrait_def_ids;
 
@@ -124,7 +125,7 @@ declare_lint_pass!(LenZero => [LEN_ZERO, LEN_WITHOUT_IS_EMPTY, COMPARISON_TO_EMP
 
 impl<'tcx> LateLintPass<'tcx> for LenZero {
     fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) {
-        if let ItemKind::Trait(_, _, ident, _, _, trait_items) = item.kind
+        if let ItemKind::Trait(_, _, _, ident, _, _, trait_items) = item.kind
             && !item.span.from_expansion()
         {
             check_trait_items(cx, item, ident, trait_items);
@@ -264,22 +265,13 @@ fn span_without_enclosing_paren(cx: &LateContext<'_>, span: Span) -> Span {
     }
 }
 
-fn check_trait_items(cx: &LateContext<'_>, visited_trait: &Item<'_>, ident: Ident, trait_items: &[TraitItemRef]) {
-    fn is_named_self(cx: &LateContext<'_>, item: &TraitItemRef, name: Symbol) -> bool {
-        item.ident.name == name
-            && if let AssocItemKind::Fn { has_self } = item.kind {
-                has_self && {
-                    cx.tcx
-                        .fn_sig(item.id.owner_id)
-                        .skip_binder()
-                        .inputs()
-                        .skip_binder()
-                        .len()
-                        == 1
-                }
-            } else {
-                false
-            }
+fn check_trait_items(cx: &LateContext<'_>, visited_trait: &Item<'_>, ident: Ident, trait_items: &[TraitItemId]) {
+    fn is_named_self(cx: &LateContext<'_>, item: &TraitItemId, name: Symbol) -> bool {
+        cx.tcx.item_name(item.owner_id) == name
+            && matches!(
+                cx.tcx.fn_arg_idents(item.owner_id),
+                [Some(Ident { name: kw::SelfLower, .. })],
+            )
     }
 
     // fill the set with current and super traits
diff --git a/src/tools/clippy/clippy_lints/src/let_if_seq.rs b/src/tools/clippy/clippy_lints/src/let_if_seq.rs
index 5db28e9ae9b..e480c8fbed5 100644
--- a/src/tools/clippy/clippy_lints/src/let_if_seq.rs
+++ b/src/tools/clippy/clippy_lints/src/let_if_seq.rs
@@ -62,15 +62,8 @@ impl<'tcx> LateLintPass<'tcx> for LetIfSeq {
             if let hir::StmtKind::Let(local) = stmt.kind
                 && let hir::PatKind::Binding(mode, canonical_id, ident, None) = local.pat.kind
                 && let hir::StmtKind::Expr(if_) = next.kind
-                && let hir::ExprKind::If(
-                    hir::Expr {
-                        kind: hir::ExprKind::DropTemps(cond),
-                        ..
-                    },
-                    then,
-                    else_,
-                ) = if_.kind
-                && !is_local_used(cx, *cond, canonical_id)
+                && let hir::ExprKind::If(cond, then, else_) = if_.kind
+                && !is_local_used(cx, cond, canonical_id)
                 && let hir::ExprKind::Block(then, _) = then.kind
                 && let Some(value) = check_assign(cx, canonical_id, then)
                 && !is_local_used(cx, value, canonical_id)
diff --git a/src/tools/clippy/clippy_lints/src/lifetimes.rs b/src/tools/clippy/clippy_lints/src/lifetimes.rs
index caf17c10484..35c9d2fd4eb 100644
--- a/src/tools/clippy/clippy_lints/src/lifetimes.rs
+++ b/src/tools/clippy/clippy_lints/src/lifetimes.rs
@@ -716,7 +716,7 @@ fn report_extra_impl_lifetimes<'tcx>(cx: &LateContext<'tcx>, impl_: &'tcx Impl<'
         walk_trait_ref(&mut checker, trait_ref);
     }
     walk_unambig_ty(&mut checker, impl_.self_ty);
-    for item in impl_.items {
+    for &item in impl_.items {
         walk_impl_item_ref(&mut checker, item);
     }
 
diff --git a/src/tools/clippy/clippy_lints/src/loops/empty_loop.rs b/src/tools/clippy/clippy_lints/src/loops/empty_loop.rs
index 823cf0f4322..e809987d75a 100644
--- a/src/tools/clippy/clippy_lints/src/loops/empty_loop.rs
+++ b/src/tools/clippy/clippy_lints/src/loops/empty_loop.rs
@@ -1,11 +1,22 @@
 use super::EMPTY_LOOP;
 use clippy_utils::diagnostics::span_lint_and_help;
-use clippy_utils::{is_in_panic_handler, is_no_std_crate};
+use clippy_utils::{is_in_panic_handler, is_no_std_crate, sym};
 
-use rustc_hir::{Block, Expr};
+use rustc_hir::{Block, Expr, ItemKind, Node};
 use rustc_lint::LateContext;
 
 pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, loop_block: &Block<'_>) {
+    let parent_hir_id = cx.tcx.parent_hir_id(expr.hir_id);
+    if let Node::Item(parent_node) = cx.tcx.hir_node(parent_hir_id)
+        && matches!(parent_node.kind, ItemKind::Fn { .. })
+        && let attrs = cx.tcx.hir_attrs(parent_hir_id)
+        && attrs.iter().any(|attr| attr.has_name(sym::rustc_intrinsic))
+    {
+        // Intrinsic functions are expanded into an empty loop when lowering the AST
+        // to simplify the job of later passes which might expect any function to have a body.
+        return;
+    }
+
     if loop_block.stmts.is_empty() && loop_block.expr.is_none() && !is_in_panic_handler(cx, expr) {
         let msg = "empty `loop {}` wastes CPU cycles";
         let help = if is_no_std_crate(cx) {
diff --git a/src/tools/clippy/clippy_lints/src/manual_let_else.rs b/src/tools/clippy/clippy_lints/src/manual_let_else.rs
index 9ff82cdcb66..1f9a943f13d 100644
--- a/src/tools/clippy/clippy_lints/src/manual_let_else.rs
+++ b/src/tools/clippy/clippy_lints/src/manual_let_else.rs
@@ -245,17 +245,36 @@ fn replace_in_pattern(
         }
 
         match pat.kind {
-            PatKind::Binding(_ann, _id, binding_name, opt_subpt) => {
-                let Some((pat_to_put, binding_mode)) = ident_map.get(&binding_name.name) else {
-                    break 'a;
-                };
-                let sn_pfx = binding_mode.prefix_str();
-                let (sn_ptp, _) = snippet_with_context(cx, pat_to_put.span, span.ctxt(), "", app);
-                if let Some(subpt) = opt_subpt {
-                    let subpt = replace_in_pattern(cx, span, ident_map, subpt, app, false);
-                    return format!("{sn_pfx}{sn_ptp} @ {subpt}");
+            PatKind::Binding(ann, _id, binding_name, opt_subpt) => {
+                match (ident_map.get(&binding_name.name), opt_subpt) {
+                    (Some((pat_to_put, binding_mode)), opt_subpt) => {
+                        let sn_pfx = binding_mode.prefix_str();
+                        let (sn_ptp, _) = snippet_with_context(cx, pat_to_put.span, span.ctxt(), "", app);
+                        if let Some(subpt) = opt_subpt {
+                            let subpt = replace_in_pattern(cx, span, ident_map, subpt, app, false);
+                            return format!("{sn_pfx}{sn_ptp} @ {subpt}");
+                        }
+                        return format!("{sn_pfx}{sn_ptp}");
+                    },
+                    (None, Some(subpt)) => {
+                        let subpt = replace_in_pattern(cx, span, ident_map, subpt, app, false);
+                        // scanning for a value that matches is not sensitive to order
+                        #[expect(rustc::potential_query_instability)]
+                        if ident_map.values().any(|(other_pat, _)| {
+                            if let PatKind::Binding(_, _, other_name, _) = other_pat.kind {
+                                other_name == binding_name
+                            } else {
+                                false
+                            }
+                        }) {
+                            // this name is shadowed, and, therefore, not usable
+                            return subpt;
+                        }
+                        let binding_pfx = ann.prefix_str();
+                        return format!("{binding_pfx}{binding_name} @ {subpt}");
+                    },
+                    (None, None) => break 'a,
                 }
-                return format!("{sn_pfx}{sn_ptp}");
             },
             PatKind::Or(pats) => {
                 let patterns = pats
diff --git a/src/tools/clippy/clippy_lints/src/manual_non_exhaustive.rs b/src/tools/clippy/clippy_lints/src/manual_non_exhaustive.rs
index 51696b38880..2d52a93f34e 100644
--- a/src/tools/clippy/clippy_lints/src/manual_non_exhaustive.rs
+++ b/src/tools/clippy/clippy_lints/src/manual_non_exhaustive.rs
@@ -4,16 +4,15 @@ use clippy_utils::is_doc_hidden;
 use clippy_utils::msrvs::{self, Msrv};
 use clippy_utils::source::snippet_indent;
 use itertools::Itertools;
+use rustc_attr_data_structures::{AttributeKind, find_attr};
 use rustc_data_structures::fx::FxHashSet;
 use rustc_errors::Applicability;
 use rustc_hir::def::{CtorKind, CtorOf, DefKind, Res};
 use rustc_hir::{Expr, ExprKind, Item, ItemKind, QPath, TyKind, VariantData};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::impl_lint_pass;
-use rustc_span::def_id::LocalDefId;
 use rustc_span::Span;
-use rustc_attr_data_structures::find_attr;
-use rustc_attr_data_structures::AttributeKind;
+use rustc_span::def_id::LocalDefId;
 
 declare_clippy_lint! {
     /// ### What it does
diff --git a/src/tools/clippy/clippy_lints/src/matches/match_same_arms.rs b/src/tools/clippy/clippy_lints/src/matches/match_same_arms.rs
index ede68f30941..ae277da089f 100644
--- a/src/tools/clippy/clippy_lints/src/matches/match_same_arms.rs
+++ b/src/tools/clippy/clippy_lints/src/matches/match_same_arms.rs
@@ -332,9 +332,7 @@ impl<'a> NormalizedPat<'a> {
                 // TODO: Handle negative integers. They're currently treated as a wild match.
                 PatExprKind::Lit { lit, negated: false } => match lit.node {
                     LitKind::Str(sym, _) => Self::LitStr(sym),
-                    LitKind::ByteStr(byte_sym, _) | LitKind::CStr(byte_sym, _) => {
-                        Self::LitBytes(byte_sym)
-                    }
+                    LitKind::ByteStr(byte_sym, _) | LitKind::CStr(byte_sym, _) => Self::LitBytes(byte_sym),
                     LitKind::Byte(val) => Self::LitInt(val.into()),
                     LitKind::Char(val) => Self::LitInt(val.into()),
                     LitKind::Int(val, _) => Self::LitInt(val.get()),
diff --git a/src/tools/clippy/clippy_lints/src/methods/from_iter_instead_of_collect.rs b/src/tools/clippy/clippy_lints/src/methods/from_iter_instead_of_collect.rs
index 045363058d1..d664eaaac70 100644
--- a/src/tools/clippy/clippy_lints/src/methods/from_iter_instead_of_collect.rs
+++ b/src/tools/clippy/clippy_lints/src/methods/from_iter_instead_of_collect.rs
@@ -4,6 +4,7 @@ use clippy_utils::diagnostics::span_lint_and_sugg;
 use clippy_utils::source::snippet_with_applicability;
 use clippy_utils::ty::implements_trait;
 use clippy_utils::{is_path_diagnostic_item, sugg};
+use rustc_ast::join_path_idents;
 use rustc_errors::Applicability;
 use rustc_hir::def::Res;
 use rustc_hir::{self as hir, Expr, ExprKind, GenericArg, QPath, TyKind};
@@ -47,7 +48,7 @@ fn build_full_type(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, app: &mut Applica
         && let QPath::Resolved(None, ty_path) = &ty_qpath
         && let Res::Def(_, ty_did) = ty_path.res
     {
-        let mut ty_str = itertools::join(ty_path.segments.iter().map(|s| s.ident), "::");
+        let mut ty_str = join_path_idents(ty_path.segments.iter().map(|seg| seg.ident));
         let mut first = true;
         let mut append = |arg: &str| {
             write!(&mut ty_str, "{}{arg}", [", ", "<"][usize::from(first)]).unwrap();
diff --git a/src/tools/clippy/clippy_lints/src/methods/manual_is_variant_and.rs b/src/tools/clippy/clippy_lints/src/methods/manual_is_variant_and.rs
index 4a61c223d2c..93325ca488e 100644
--- a/src/tools/clippy/clippy_lints/src/methods/manual_is_variant_and.rs
+++ b/src/tools/clippy/clippy_lints/src/methods/manual_is_variant_and.rs
@@ -1,14 +1,16 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
-use clippy_utils::get_parent_expr;
 use clippy_utils::msrvs::{self, Msrv};
-use clippy_utils::source::{snippet, snippet_opt};
+use clippy_utils::source::{snippet, snippet_with_applicability};
+use clippy_utils::sugg::Sugg;
 use clippy_utils::ty::is_type_diagnostic_item;
+use clippy_utils::{get_parent_expr, sym};
+use rustc_ast::LitKind;
 use rustc_errors::Applicability;
 use rustc_hir::def::{CtorKind, CtorOf, DefKind, Res};
-use rustc_hir::{BinOpKind, Expr, ExprKind, QPath};
+use rustc_hir::{BinOpKind, Closure, Expr, ExprKind, QPath};
 use rustc_lint::LateContext;
 use rustc_middle::ty;
-use rustc_span::{BytePos, Span, sym};
+use rustc_span::{Span, Symbol};
 
 use super::MANUAL_IS_VARIANT_AND;
 
@@ -62,54 +64,154 @@ pub(super) fn check(
     );
 }
 
-fn emit_lint(cx: &LateContext<'_>, op: BinOpKind, parent: &Expr<'_>, method_span: Span, is_option: bool) {
-    if let Some(before_map_snippet) = snippet_opt(cx, parent.span.with_hi(method_span.lo()))
-        && let Some(after_map_snippet) = snippet_opt(cx, method_span.with_lo(method_span.lo() + BytePos(3)))
-    {
-        span_lint_and_sugg(
-            cx,
-            MANUAL_IS_VARIANT_AND,
-            parent.span,
-            format!(
-                "called `.map() {}= {}()`",
-                if op == BinOpKind::Eq { '=' } else { '!' },
-                if is_option { "Some" } else { "Ok" },
-            ),
-            "use",
-            if is_option && op == BinOpKind::Ne {
-                format!("{before_map_snippet}is_none_or{after_map_snippet}",)
-            } else {
+#[derive(Clone, Copy, PartialEq)]
+enum Flavor {
+    Option,
+    Result,
+}
+
+impl Flavor {
+    const fn symbol(self) -> Symbol {
+        match self {
+            Self::Option => sym::Option,
+            Self::Result => sym::Result,
+        }
+    }
+
+    const fn positive(self) -> Symbol {
+        match self {
+            Self::Option => sym::Some,
+            Self::Result => sym::Ok,
+        }
+    }
+}
+
+#[derive(Clone, Copy, PartialEq)]
+enum Op {
+    Eq,
+    Ne,
+}
+
+impl std::fmt::Display for Op {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Eq => write!(f, "=="),
+            Self::Ne => write!(f, "!="),
+        }
+    }
+}
+
+impl TryFrom<BinOpKind> for Op {
+    type Error = ();
+    fn try_from(op: BinOpKind) -> Result<Self, Self::Error> {
+        match op {
+            BinOpKind::Eq => Ok(Self::Eq),
+            BinOpKind::Ne => Ok(Self::Ne),
+            _ => Err(()),
+        }
+    }
+}
+
+/// Represents the argument of the `.map()` function, as a closure or as a path
+/// in case η-reduction is used.
+enum MapFunc<'hir> {
+    Closure(&'hir Closure<'hir>),
+    Path(&'hir Expr<'hir>),
+}
+
+impl<'hir> TryFrom<&'hir Expr<'hir>> for MapFunc<'hir> {
+    type Error = ();
+
+    fn try_from(expr: &'hir Expr<'hir>) -> Result<Self, Self::Error> {
+        match expr.kind {
+            ExprKind::Closure(closure) => Ok(Self::Closure(closure)),
+            ExprKind::Path(_) => Ok(Self::Path(expr)),
+            _ => Err(()),
+        }
+    }
+}
+
+impl<'hir> MapFunc<'hir> {
+    /// Build a suggestion suitable for use in a `.map()`-like function. η-expansion will be applied
+    /// as needed.
+    fn sugg(self, cx: &LateContext<'hir>, invert: bool, app: &mut Applicability) -> String {
+        match self {
+            Self::Closure(closure) => {
+                let body = Sugg::hir_with_applicability(cx, cx.tcx.hir_body(closure.body).value, "..", app);
                 format!(
-                    "{}{before_map_snippet}{}{after_map_snippet}",
-                    if op == BinOpKind::Eq { "" } else { "!" },
-                    if is_option { "is_some_and" } else { "is_ok_and" },
+                    "{} {}",
+                    snippet_with_applicability(cx, closure.fn_decl_span, "|..|", app),
+                    if invert { !body } else { body }
                 )
             },
-            Applicability::MachineApplicable,
-        );
+            Self::Path(expr) => {
+                let path = snippet_with_applicability(cx, expr.span, "_", app);
+                if invert {
+                    format!("|x| !{path}(x)")
+                } else {
+                    path.to_string()
+                }
+            },
+        }
     }
 }
 
+fn emit_lint<'tcx>(
+    cx: &LateContext<'tcx>,
+    span: Span,
+    op: Op,
+    flavor: Flavor,
+    in_some_or_ok: bool,
+    map_func: MapFunc<'tcx>,
+    recv: &Expr<'_>,
+) {
+    let mut app = Applicability::MachineApplicable;
+    let recv = snippet_with_applicability(cx, recv.span, "_", &mut app);
+
+    let (invert_expr, method, invert_body) = match (flavor, op) {
+        (Flavor::Option, Op::Eq) => (false, "is_some_and", !in_some_or_ok),
+        (Flavor::Option, Op::Ne) => (false, "is_none_or", in_some_or_ok),
+        (Flavor::Result, Op::Eq) => (false, "is_ok_and", !in_some_or_ok),
+        (Flavor::Result, Op::Ne) => (true, "is_ok_and", !in_some_or_ok),
+    };
+    span_lint_and_sugg(
+        cx,
+        MANUAL_IS_VARIANT_AND,
+        span,
+        format!("called `.map() {op} {pos}()`", pos = flavor.positive(),),
+        "use",
+        format!(
+            "{inversion}{recv}.{method}({body})",
+            inversion = if invert_expr { "!" } else { "" },
+            body = map_func.sugg(cx, invert_body, &mut app),
+        ),
+        app,
+    );
+}
+
 pub(super) fn check_map(cx: &LateContext<'_>, expr: &Expr<'_>) {
     if let Some(parent_expr) = get_parent_expr(cx, expr)
         && let ExprKind::Binary(op, left, right) = parent_expr.kind
-        && matches!(op.node, BinOpKind::Eq | BinOpKind::Ne)
         && op.span.eq_ctxt(expr.span)
+        && let Ok(op) = Op::try_from(op.node)
     {
         // Check `left` and `right` expression in any order, and for `Option` and `Result`
         for (expr1, expr2) in [(left, right), (right, left)] {
-            for item in [sym::Option, sym::Result] {
-                if let ExprKind::Call(call, ..) = expr1.kind
+            for flavor in [Flavor::Option, Flavor::Result] {
+                if let ExprKind::Call(call, [arg]) = expr1.kind
+                    && let ExprKind::Lit(lit) = arg.kind
+                    && let LitKind::Bool(bool_cst) = lit.node
                     && let ExprKind::Path(QPath::Resolved(_, path)) = call.kind
                     && let Res::Def(DefKind::Ctor(CtorOf::Variant, CtorKind::Fn), _) = path.res
                     && let ty = cx.typeck_results().expr_ty(expr1)
                     && let ty::Adt(adt, args) = ty.kind()
-                    && cx.tcx.is_diagnostic_item(item, adt.did())
+                    && cx.tcx.is_diagnostic_item(flavor.symbol(), adt.did())
                     && args.type_at(0).is_bool()
-                    && let ExprKind::MethodCall(_, recv, _, span) = expr2.kind
-                    && is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), item)
+                    && let ExprKind::MethodCall(_, recv, [map_expr], _) = expr2.kind
+                    && is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), flavor.symbol())
+                    && let Ok(map_func) = MapFunc::try_from(map_expr)
                 {
-                    return emit_lint(cx, op.node, parent_expr, span, item == sym::Option);
+                    return emit_lint(cx, parent_expr.span, op, flavor, bool_cst, map_func, recv);
                 }
             }
         }
diff --git a/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs b/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs
index 2139466ce74..6ce7dd3d4d0 100644
--- a/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs
+++ b/src/tools/clippy/clippy_lints/src/methods/or_fun_call.rs
@@ -136,7 +136,7 @@ pub(super) fn check<'tcx>(
         fun_span: Option<Span>,
     ) -> bool {
         // (path, fn_has_argument, methods, suffix)
-        const KNOW_TYPES: [(Symbol, bool, &[Symbol], &str); 5] = [
+        const KNOW_TYPES: [(Symbol, bool, &[Symbol], &str); 7] = [
             (sym::BTreeEntry, false, &[sym::or_insert], "with"),
             (sym::HashMapEntry, false, &[sym::or_insert], "with"),
             (
@@ -146,7 +146,9 @@ pub(super) fn check<'tcx>(
                 "else",
             ),
             (sym::Option, false, &[sym::get_or_insert], "with"),
+            (sym::Option, true, &[sym::and], "then"),
             (sym::Result, true, &[sym::map_or, sym::or, sym::unwrap_or], "else"),
+            (sym::Result, true, &[sym::and], "then"),
         ];
 
         if KNOW_TYPES.iter().any(|k| k.2.contains(&name))
diff --git a/src/tools/clippy/clippy_lints/src/methods/return_and_then.rs b/src/tools/clippy/clippy_lints/src/methods/return_and_then.rs
index df8544f9220..54f38a322b8 100644
--- a/src/tools/clippy/clippy_lints/src/methods/return_and_then.rs
+++ b/src/tools/clippy/clippy_lints/src/methods/return_and_then.rs
@@ -1,5 +1,5 @@
 use rustc_errors::Applicability;
-use rustc_hir as hir;
+use rustc_hir::{self as hir, Node};
 use rustc_lint::LateContext;
 use rustc_middle::ty::{self, GenericArg, Ty};
 use rustc_span::sym;
@@ -9,7 +9,7 @@ use clippy_utils::diagnostics::span_lint_and_sugg;
 use clippy_utils::source::{indent_of, reindent_multiline, snippet_with_applicability};
 use clippy_utils::ty::get_type_diagnostic_name;
 use clippy_utils::visitors::for_each_unconsumed_temporary;
-use clippy_utils::{get_parent_expr, peel_blocks};
+use clippy_utils::{peel_blocks, potential_return_of_enclosing_body};
 
 use super::RETURN_AND_THEN;
 
@@ -21,7 +21,7 @@ pub(super) fn check<'tcx>(
     recv: &'tcx hir::Expr<'tcx>,
     arg: &'tcx hir::Expr<'_>,
 ) {
-    if cx.tcx.hir_get_fn_id_for_return_block(expr.hir_id).is_none() {
+    if !potential_return_of_enclosing_body(cx, expr) {
         return;
     }
 
@@ -55,15 +55,28 @@ pub(super) fn check<'tcx>(
         None => &body_snip,
     };
 
-    // If suggestion is going to get inserted as part of a `return` expression, it must be blockified.
-    let sugg = if let Some(parent_expr) = get_parent_expr(cx, expr) {
-        let base_indent = indent_of(cx, parent_expr.span);
+    // If suggestion is going to get inserted as part of a `return` expression or as a match expression
+    // arm, it must be blockified.
+    let (parent_span_for_indent, opening_paren, closing_paren) = match cx.tcx.parent_hir_node(expr.hir_id) {
+        Node::Expr(parent_expr) if matches!(parent_expr.kind, hir::ExprKind::Break(..)) => {
+            (Some(parent_expr.span), "(", ")")
+        },
+        Node::Expr(parent_expr) => (Some(parent_expr.span), "", ""),
+        Node::Arm(match_arm) => (Some(match_arm.span), "", ""),
+        _ => (None, "", ""),
+    };
+    let sugg = if let Some(span) = parent_span_for_indent {
+        let base_indent = indent_of(cx, span);
         let inner_indent = base_indent.map(|i| i + 4);
         format!(
             "{}\n{}\n{}",
-            reindent_multiline(&format!("{{\nlet {arg_snip} = {recv_snip}?;"), true, inner_indent),
+            reindent_multiline(
+                &format!("{opening_paren}{{\nlet {arg_snip} = {recv_snip}?;"),
+                true,
+                inner_indent
+            ),
             reindent_multiline(inner, false, inner_indent),
-            reindent_multiline("}", false, base_indent),
+            reindent_multiline(&format!("}}{closing_paren}"), false, base_indent),
         )
     } else {
         format!(
diff --git a/src/tools/clippy/clippy_lints/src/methods/swap_with_temporary.rs b/src/tools/clippy/clippy_lints/src/methods/swap_with_temporary.rs
index de729fb343a..e378cbd6ae0 100644
--- a/src/tools/clippy/clippy_lints/src/methods/swap_with_temporary.rs
+++ b/src/tools/clippy/clippy_lints/src/methods/swap_with_temporary.rs
@@ -4,6 +4,7 @@ use rustc_ast::BorrowKind;
 use rustc_errors::{Applicability, Diag};
 use rustc_hir::{Expr, ExprKind, Node, QPath};
 use rustc_lint::LateContext;
+use rustc_middle::ty::adjustment::Adjust;
 use rustc_span::sym;
 
 use super::SWAP_WITH_TEMPORARY;
@@ -11,12 +12,12 @@ use super::SWAP_WITH_TEMPORARY;
 const MSG_TEMPORARY: &str = "this expression returns a temporary value";
 const MSG_TEMPORARY_REFMUT: &str = "this is a mutable reference to a temporary value";
 
-pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, func: &Expr<'_>, args: &[Expr<'_>]) {
+pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'_>, func: &Expr<'_>, args: &'tcx [Expr<'_>]) {
     if let ExprKind::Path(QPath::Resolved(_, func_path)) = func.kind
         && let Some(func_def_id) = func_path.res.opt_def_id()
         && cx.tcx.is_diagnostic_item(sym::mem_swap, func_def_id)
     {
-        match (ArgKind::new(&args[0]), ArgKind::new(&args[1])) {
+        match (ArgKind::new(cx, &args[0]), ArgKind::new(cx, &args[1])) {
             (ArgKind::RefMutToTemp(left_temp), ArgKind::RefMutToTemp(right_temp)) => {
                 emit_lint_useless(cx, expr, &args[0], &args[1], left_temp, right_temp);
             },
@@ -28,10 +29,10 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, func: &Expr<'_>, args
 }
 
 enum ArgKind<'tcx> {
-    // Mutable reference to a place, coming from a macro
-    RefMutToPlaceAsMacro(&'tcx Expr<'tcx>),
-    // Place behind a mutable reference
-    RefMutToPlace(&'tcx Expr<'tcx>),
+    // Mutable reference to a place, coming from a macro, and number of dereferences to use
+    RefMutToPlaceAsMacro(&'tcx Expr<'tcx>, usize),
+    // Place behind a mutable reference, and number of dereferences to use
+    RefMutToPlace(&'tcx Expr<'tcx>, usize),
     // Temporary value behind a mutable reference
     RefMutToTemp(&'tcx Expr<'tcx>),
     // Any other case
@@ -39,13 +40,29 @@ enum ArgKind<'tcx> {
 }
 
 impl<'tcx> ArgKind<'tcx> {
-    fn new(arg: &'tcx Expr<'tcx>) -> Self {
-        if let ExprKind::AddrOf(BorrowKind::Ref, _, target) = arg.kind {
-            if target.is_syntactic_place_expr() {
+    /// Build a new `ArgKind` from `arg`. There must be no false positive when returning a
+    /// `ArgKind::RefMutToTemp` variant, as this may cause a spurious lint to be emitted.
+    fn new(cx: &LateContext<'tcx>, arg: &'tcx Expr<'tcx>) -> Self {
+        if let ExprKind::AddrOf(BorrowKind::Ref, _, target) = arg.kind
+            && let adjustments = cx.typeck_results().expr_adjustments(arg)
+            && adjustments
+                .first()
+                .is_some_and(|adj| matches!(adj.kind, Adjust::Deref(None)))
+            && adjustments
+                .last()
+                .is_some_and(|adj| matches!(adj.kind, Adjust::Borrow(_)))
+        {
+            let extra_derefs = adjustments[1..adjustments.len() - 1]
+                .iter()
+                .filter(|adj| matches!(adj.kind, Adjust::Deref(_)))
+                .count();
+            // If a deref is used, `arg` might be a place expression. For example, a mutex guard
+            // would dereference into the mutex content which is probably not temporary.
+            if target.is_syntactic_place_expr() || extra_derefs > 0 {
                 if arg.span.from_expansion() {
-                    ArgKind::RefMutToPlaceAsMacro(arg)
+                    ArgKind::RefMutToPlaceAsMacro(arg, extra_derefs)
                 } else {
-                    ArgKind::RefMutToPlace(target)
+                    ArgKind::RefMutToPlace(target, extra_derefs)
                 }
             } else {
                 ArgKind::RefMutToTemp(target)
@@ -106,10 +123,15 @@ fn emit_lint_assign(cx: &LateContext<'_>, expr: &Expr<'_>, target: &ArgKind<'_>,
                 let mut applicability = Applicability::MachineApplicable;
                 let ctxt = expr.span.ctxt();
                 let assign_target = match target {
-                    ArgKind::Expr(target) | ArgKind::RefMutToPlaceAsMacro(target) => {
-                        Sugg::hir_with_context(cx, target, ctxt, "_", &mut applicability).deref()
-                    },
-                    ArgKind::RefMutToPlace(target) => Sugg::hir_with_context(cx, target, ctxt, "_", &mut applicability),
+                    ArgKind::Expr(target) => Sugg::hir_with_context(cx, target, ctxt, "_", &mut applicability).deref(),
+                    ArgKind::RefMutToPlaceAsMacro(arg, derefs) => (0..*derefs).fold(
+                        Sugg::hir_with_context(cx, arg, ctxt, "_", &mut applicability).deref(),
+                        |sugg, _| sugg.deref(),
+                    ),
+                    ArgKind::RefMutToPlace(target, derefs) => (0..*derefs).fold(
+                        Sugg::hir_with_context(cx, target, ctxt, "_", &mut applicability),
+                        |sugg, _| sugg.deref(),
+                    ),
                     ArgKind::RefMutToTemp(_) => unreachable!(),
                 };
                 let assign_source = Sugg::hir_with_context(cx, temp, ctxt, "_", &mut applicability);
diff --git a/src/tools/clippy/clippy_lints/src/methods/unnecessary_map_or.rs b/src/tools/clippy/clippy_lints/src/methods/unnecessary_map_or.rs
index b90748dd158..4a9007c607c 100644
--- a/src/tools/clippy/clippy_lints/src/methods/unnecessary_map_or.rs
+++ b/src/tools/clippy/clippy_lints/src/methods/unnecessary_map_or.rs
@@ -62,7 +62,8 @@ pub(super) fn check<'a>(
 
     let ext_def_span = def.span.until(map.span);
 
-    let (sugg, method, applicability) = if let ExprKind::Closure(map_closure) = map.kind
+    let (sugg, method, applicability) = if cx.typeck_results().expr_adjustments(recv).is_empty()
+            && let ExprKind::Closure(map_closure) = map.kind
             && let closure_body = cx.tcx.hir_body(map_closure.body)
             && let closure_body_value = closure_body.value.peel_blocks()
             && let ExprKind::Binary(op, l, r) = closure_body_value.kind
diff --git a/src/tools/clippy/clippy_lints/src/missing_fields_in_debug.rs b/src/tools/clippy/clippy_lints/src/missing_fields_in_debug.rs
index d4d33029dbd..760ecf07589 100644
--- a/src/tools/clippy/clippy_lints/src/missing_fields_in_debug.rs
+++ b/src/tools/clippy/clippy_lints/src/missing_fields_in_debug.rs
@@ -8,7 +8,7 @@ use rustc_ast::LitKind;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::{
-    Block, Expr, ExprKind, Impl, ImplItem, ImplItemKind, Item, ItemKind, LangItem, Node, QPath, TyKind, VariantData,
+    Block, Expr, ExprKind, Impl, Item, ItemKind, LangItem, Node, QPath, TyKind, VariantData,
 };
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty::{Ty, TypeckResults};
@@ -200,7 +200,7 @@ fn check_struct<'tcx>(
 impl<'tcx> LateLintPass<'tcx> for MissingFieldsInDebug {
     fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'tcx>) {
         // is this an `impl Debug for X` block?
-        if let ItemKind::Impl(Impl { of_trait: Some(trait_ref), self_ty, items, .. }) = item.kind
+        if let ItemKind::Impl(Impl { of_trait: Some(trait_ref), self_ty, .. }) = item.kind
             && let Res::Def(DefKind::Trait, trait_def_id) = trait_ref.path.res
             && let TyKind::Path(QPath::Resolved(_, self_path)) = &self_ty.kind
             // make sure that the self type is either a struct, an enum or a union
@@ -212,9 +212,8 @@ impl<'tcx> LateLintPass<'tcx> for MissingFieldsInDebug {
             && !cx.tcx.is_automatically_derived(item.owner_id.to_def_id())
             && !item.span.from_expansion()
             // find `Debug::fmt` function
-            && let Some(fmt_item) = items.iter().find(|i| i.ident.name == sym::fmt)
-            && let ImplItem { kind: ImplItemKind::Fn(_, body_id), .. } = cx.tcx.hir_impl_item(fmt_item.id)
-            && let body = cx.tcx.hir_body(*body_id)
+            && let Some(fmt_item) = cx.tcx.associated_items(item.owner_id).filter_by_name_unhygienic(sym::fmt).next()
+            && let body = cx.tcx.hir_body_owned_by(fmt_item.def_id.expect_local())
             && let ExprKind::Block(block, _) = body.value.kind
             // inspect `self`
             && let self_ty = cx.tcx.type_of(self_path_did).skip_binder().peel_refs()
@@ -222,7 +221,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingFieldsInDebug {
             && let Some(self_def_id) = self_adt.did().as_local()
             && let Node::Item(self_item) = cx.tcx.hir_node_by_def_id(self_def_id)
             // NB: can't call cx.typeck_results() as we are not in a body
-            && let typeck_results = cx.tcx.typeck_body(*body_id)
+            && let typeck_results = cx.tcx.typeck_body(body.id())
             && should_lint(cx, typeck_results, block)
             // we intentionally only lint structs, see lint description
             && let ItemKind::Struct(_, _, data) = &self_item.kind
diff --git a/src/tools/clippy/clippy_lints/src/missing_inline.rs b/src/tools/clippy/clippy_lints/src/missing_inline.rs
index 25c95d23436..c4a3d10299b 100644
--- a/src/tools/clippy/clippy_lints/src/missing_inline.rs
+++ b/src/tools/clippy/clippy_lints/src/missing_inline.rs
@@ -101,19 +101,19 @@ impl<'tcx> LateLintPass<'tcx> for MissingInline {
                 let attrs = cx.tcx.hir_attrs(it.hir_id());
                 check_missing_inline_attrs(cx, attrs, it.span, desc);
             },
-            hir::ItemKind::Trait(ref _is_auto, ref _unsafe, _ident, _generics, _bounds, trait_items) => {
+            hir::ItemKind::Trait(ref _constness, ref _is_auto, ref _unsafe, _ident, _generics, _bounds, trait_items) => {
                 // note: we need to check if the trait is exported so we can't use
                 // `LateLintPass::check_trait_item` here.
-                for tit in trait_items {
-                    let tit_ = cx.tcx.hir_trait_item(tit.id);
+                for &tit in trait_items {
+                    let tit_ = cx.tcx.hir_trait_item(tit);
                     match tit_.kind {
                         hir::TraitItemKind::Const(..) | hir::TraitItemKind::Type(..) => {},
                         hir::TraitItemKind::Fn(..) => {
-                            if cx.tcx.defaultness(tit.id.owner_id).has_value() {
+                            if cx.tcx.defaultness(tit.owner_id).has_value() {
                                 // trait method with default body needs inline in case
                                 // an impl is not provided
                                 let desc = "a default trait method";
-                                let item = cx.tcx.hir_trait_item(tit.id);
+                                let item = cx.tcx.hir_trait_item(tit);
                                 let attrs = cx.tcx.hir_attrs(item.hir_id());
                                 check_missing_inline_attrs(cx, attrs, item.span, desc);
                             }
diff --git a/src/tools/clippy/clippy_lints/src/missing_trait_methods.rs b/src/tools/clippy/clippy_lints/src/missing_trait_methods.rs
index e266c36b6e7..fa61d0fa11a 100644
--- a/src/tools/clippy/clippy_lints/src/missing_trait_methods.rs
+++ b/src/tools/clippy/clippy_lints/src/missing_trait_methods.rs
@@ -61,15 +61,14 @@ impl<'tcx> LateLintPass<'tcx> for MissingTraitMethods {
         if !is_lint_allowed(cx, MISSING_TRAIT_METHODS, item.hir_id())
             && span_is_local(item.span)
             && let ItemKind::Impl(Impl {
-                items,
                 of_trait: Some(trait_ref),
                 ..
             }) = item.kind
             && let Some(trait_id) = trait_ref.trait_def_id()
         {
-            let trait_item_ids: DefIdSet = items
-                .iter()
-                .filter_map(|impl_item| impl_item.trait_item_def_id)
+            let trait_item_ids: DefIdSet = cx.tcx.associated_items(item.owner_id)
+                .in_definition_order()
+                .filter_map(|assoc_item| assoc_item.trait_item_def_id)
                 .collect();
 
             for assoc in cx
diff --git a/src/tools/clippy/clippy_lints/src/needless_bool.rs b/src/tools/clippy/clippy_lints/src/needless_bool.rs
index 3ed4b1c2ea9..b3aa1a7286a 100644
--- a/src/tools/clippy/clippy_lints/src/needless_bool.rs
+++ b/src/tools/clippy/clippy_lints/src/needless_bool.rs
@@ -199,11 +199,16 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessBool {
                 let mut applicability = Applicability::MachineApplicable;
                 let cond = Sugg::hir_with_applicability(cx, cond, "..", &mut applicability);
                 let lhs = snippet_with_applicability(cx, lhs_a.span, "..", &mut applicability);
-                let sugg = if a == b {
+                let mut sugg = if a == b {
                     format!("{cond}; {lhs} = {a:?};")
                 } else {
                     format!("{lhs} = {};", if a { cond } else { !cond })
                 };
+
+                if is_else_clause(cx.tcx, e) {
+                    sugg = format!("{{ {sugg} }}");
+                }
+
                 span_lint_and_sugg(
                     cx,
                     NEEDLESS_BOOL_ASSIGN,
diff --git a/src/tools/clippy/clippy_lints/src/neg_multiply.rs b/src/tools/clippy/clippy_lints/src/neg_multiply.rs
index 442280f9998..946114e1041 100644
--- a/src/tools/clippy/clippy_lints/src/neg_multiply.rs
+++ b/src/tools/clippy/clippy_lints/src/neg_multiply.rs
@@ -1,13 +1,13 @@
 use clippy_utils::consts::{self, Constant};
 use clippy_utils::diagnostics::span_lint_and_sugg;
-use clippy_utils::source::snippet_with_context;
+use clippy_utils::get_parent_expr;
+use clippy_utils::source::{snippet, snippet_with_context};
 use clippy_utils::sugg::has_enclosing_paren;
 use rustc_ast::util::parser::ExprPrecedence;
 use rustc_errors::Applicability;
 use rustc_hir::{BinOpKind, Expr, ExprKind, UnOp};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::declare_lint_pass;
-use rustc_span::Span;
 
 declare_clippy_lint! {
     /// ### What it does
@@ -33,6 +33,19 @@ declare_clippy_lint! {
 
 declare_lint_pass!(NegMultiply => [NEG_MULTIPLY]);
 
+fn is_in_parens_with_postfix(cx: &LateContext<'_>, mul_expr: &Expr<'_>) -> bool {
+    if let Some(parent) = get_parent_expr(cx, mul_expr) {
+        let mult_snippet = snippet(cx, mul_expr.span, "");
+        if has_enclosing_paren(&mult_snippet)
+            && let ExprKind::MethodCall(_, _, _, _) = parent.kind
+        {
+            return true;
+        }
+    }
+
+    false
+}
+
 impl<'tcx> LateLintPass<'tcx> for NegMultiply {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) {
         if let ExprKind::Binary(ref op, left, right) = e.kind
@@ -40,15 +53,15 @@ impl<'tcx> LateLintPass<'tcx> for NegMultiply {
         {
             match (&left.kind, &right.kind) {
                 (&ExprKind::Unary(..), &ExprKind::Unary(..)) => {},
-                (&ExprKind::Unary(UnOp::Neg, lit), _) => check_mul(cx, e.span, lit, right),
-                (_, &ExprKind::Unary(UnOp::Neg, lit)) => check_mul(cx, e.span, lit, left),
+                (&ExprKind::Unary(UnOp::Neg, lit), _) => check_mul(cx, e, lit, right),
+                (_, &ExprKind::Unary(UnOp::Neg, lit)) => check_mul(cx, e, lit, left),
                 _ => {},
             }
         }
     }
 }
 
-fn check_mul(cx: &LateContext<'_>, span: Span, lit: &Expr<'_>, exp: &Expr<'_>) {
+fn check_mul(cx: &LateContext<'_>, mul_expr: &Expr<'_>, lit: &Expr<'_>, exp: &Expr<'_>) {
     const F16_ONE: u16 = 1.0_f16.to_bits();
     const F128_ONE: u128 = 1.0_f128.to_bits();
     if let ExprKind::Lit(l) = lit.kind
@@ -63,8 +76,19 @@ fn check_mul(cx: &LateContext<'_>, span: Span, lit: &Expr<'_>, exp: &Expr<'_>) {
         && cx.typeck_results().expr_ty(exp).is_numeric()
     {
         let mut applicability = Applicability::MachineApplicable;
-        let (snip, from_macro) = snippet_with_context(cx, exp.span, span.ctxt(), "..", &mut applicability);
-        let suggestion = if !from_macro && cx.precedence(exp) < ExprPrecedence::Prefix && !has_enclosing_paren(&snip) {
+        let (snip, from_macro) = snippet_with_context(cx, exp.span, mul_expr.span.ctxt(), "..", &mut applicability);
+
+        let needs_parens_for_postfix = is_in_parens_with_postfix(cx, mul_expr);
+
+        let suggestion = if needs_parens_for_postfix {
+            // Special case: when the multiplication is in parentheses followed by a method call
+            // we need to preserve the grouping but negate the inner expression.
+            // Consider this expression: `((a.delta - 0.5).abs() * -1.0).total_cmp(&1.0)`
+            // We need to end up with: `(-(a.delta - 0.5).abs()).total_cmp(&1.0)`
+            // Otherwise, without the parentheses we would try to negate an Ordering:
+            // `-(a.delta - 0.5).abs().total_cmp(&1.0)`
+            format!("(-{snip})")
+        } else if !from_macro && cx.precedence(exp) < ExprPrecedence::Prefix && !has_enclosing_paren(&snip) {
             format!("-({snip})")
         } else {
             format!("-{snip}")
@@ -72,7 +96,7 @@ fn check_mul(cx: &LateContext<'_>, span: Span, lit: &Expr<'_>, exp: &Expr<'_>) {
         span_lint_and_sugg(
             cx,
             NEG_MULTIPLY,
-            span,
+            mul_expr.span,
             "this multiplication by -1 can be written more succinctly",
             "consider using",
             suggestion,
diff --git a/src/tools/clippy/clippy_lints/src/new_without_default.rs b/src/tools/clippy/clippy_lints/src/new_without_default.rs
index 4b73a4455f5..3b86f1d1f59 100644
--- a/src/tools/clippy/clippy_lints/src/new_without_default.rs
+++ b/src/tools/clippy/clippy_lints/src/new_without_default.rs
@@ -6,6 +6,7 @@ use rustc_errors::Applicability;
 use rustc_hir as hir;
 use rustc_hir::HirIdSet;
 use rustc_lint::{LateContext, LateLintPass, LintContext};
+use rustc_middle::ty::AssocKind;
 use rustc_session::impl_lint_pass;
 use rustc_span::sym;
 
@@ -61,18 +62,18 @@ impl<'tcx> LateLintPass<'tcx> for NewWithoutDefault {
             of_trait: None,
             generics,
             self_ty: impl_self_ty,
-            items,
             ..
         }) = item.kind
         {
-            for assoc_item in *items {
-                if assoc_item.kind == (hir::AssocItemKind::Fn { has_self: false }) {
-                    let impl_item = cx.tcx.hir_impl_item(assoc_item.id);
+            for assoc_item in cx.tcx.associated_items(item.owner_id.def_id)
+                .filter_by_name_unhygienic(sym::new)
+            {
+                if let AssocKind::Fn { has_self: false, .. } = assoc_item.kind {
+                    let impl_item = cx.tcx.hir_node_by_def_id(assoc_item.def_id.expect_local()).expect_impl_item();
                     if impl_item.span.in_external_macro(cx.sess().source_map()) {
                         return;
                     }
                     if let hir::ImplItemKind::Fn(ref sig, _) = impl_item.kind {
-                        let name = impl_item.ident.name;
                         let id = impl_item.owner_id;
                         if sig.header.is_unsafe() {
                             // can't be implemented for unsafe new
@@ -88,11 +89,9 @@ impl<'tcx> LateLintPass<'tcx> for NewWithoutDefault {
                             return;
                         }
                         if sig.decl.inputs.is_empty()
-                            && name == sym::new
                             && cx.effective_visibilities.is_reachable(impl_item.owner_id.def_id)
-                            && let self_def_id = cx.tcx.hir_get_parent_item(id.into())
-                            && let self_ty = cx.tcx.type_of(self_def_id).instantiate_identity()
-                            && self_ty == return_ty(cx, id)
+                            && let self_ty = cx.tcx.type_of(item.owner_id).instantiate_identity()
+                            && self_ty == return_ty(cx, impl_item.owner_id)
                             && let Some(default_trait_id) = cx.tcx.get_diagnostic_item(sym::Default)
                         {
                             if self.impling_types.is_none() {
@@ -111,7 +110,7 @@ impl<'tcx> LateLintPass<'tcx> for NewWithoutDefault {
                             // Check if a Default implementation exists for the Self type, regardless of
                             // generics
                             if let Some(ref impling_types) = self.impling_types
-                                && let self_def = cx.tcx.type_of(self_def_id).instantiate_identity()
+                                && let self_def = cx.tcx.type_of(item.owner_id).instantiate_identity()
                                 && let Some(self_def) = self_def.ty_adt_def()
                                 && let Some(self_local_did) = self_def.did().as_local()
                                 && let self_id = cx.tcx.local_def_id_to_hir_id(self_local_did)
diff --git a/src/tools/clippy/clippy_lints/src/no_effect.rs b/src/tools/clippy/clippy_lints/src/no_effect.rs
index 02c48166131..72e6503e7e4 100644
--- a/src/tools/clippy/clippy_lints/src/no_effect.rs
+++ b/src/tools/clippy/clippy_lints/src/no_effect.rs
@@ -1,6 +1,6 @@
 use clippy_utils::diagnostics::{span_lint_hir, span_lint_hir_and_then};
 use clippy_utils::source::SpanRangeExt;
-use clippy_utils::ty::has_drop;
+use clippy_utils::ty::{expr_type_is_certain, has_drop};
 use clippy_utils::{
     in_automatically_derived, is_inside_always_const_context, is_lint_allowed, path_to_local, peel_blocks,
 };
@@ -340,11 +340,13 @@ fn reduce_expression<'a>(cx: &LateContext<'_>, expr: &'a Expr<'a>) -> Option<Vec
         },
         ExprKind::Array(v) | ExprKind::Tup(v) => Some(v.iter().collect()),
         ExprKind::Repeat(inner, _)
-        | ExprKind::Cast(inner, _)
         | ExprKind::Type(inner, _)
         | ExprKind::Unary(_, inner)
         | ExprKind::Field(inner, _)
         | ExprKind::AddrOf(_, _, inner) => reduce_expression(cx, inner).or_else(|| Some(vec![inner])),
+        ExprKind::Cast(inner, _) if expr_type_is_certain(cx, inner) => {
+            reduce_expression(cx, inner).or_else(|| Some(vec![inner]))
+        },
         ExprKind::Struct(_, fields, ref base) => {
             if has_drop(cx, cx.typeck_results().expr_ty(expr)) {
                 None
diff --git a/src/tools/clippy/clippy_lints/src/operators/op_ref.rs b/src/tools/clippy/clippy_lints/src/operators/op_ref.rs
index 0faa7b9e646..21e1ab0f4f2 100644
--- a/src/tools/clippy/clippy_lints/src/operators/op_ref.rs
+++ b/src/tools/clippy/clippy_lints/src/operators/op_ref.rs
@@ -1,6 +1,6 @@
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::get_enclosing_block;
-use clippy_utils::source::snippet;
+use clippy_utils::source::snippet_with_context;
 use clippy_utils::ty::{implements_trait, is_copy};
 use rustc_errors::Applicability;
 use rustc_hir::def::Res;
@@ -61,12 +61,13 @@ pub(crate) fn check<'tcx>(
                         e.span,
                         "needlessly taken reference of both operands",
                         |diag| {
-                            let lsnip = snippet(cx, l.span, "...").to_string();
-                            let rsnip = snippet(cx, r.span, "...").to_string();
+                            let mut applicability = Applicability::MachineApplicable;
+                            let (lsnip, _) = snippet_with_context(cx, l.span, e.span.ctxt(), "...", &mut applicability);
+                            let (rsnip, _) = snippet_with_context(cx, r.span, e.span.ctxt(), "...", &mut applicability);
                             diag.multipart_suggestion(
                                 "use the values directly",
-                                vec![(left.span, lsnip), (right.span, rsnip)],
-                                Applicability::MachineApplicable,
+                                vec![(left.span, lsnip.to_string()), (right.span, rsnip.to_string())],
+                                applicability,
                             );
                         },
                     );
@@ -80,13 +81,9 @@ pub(crate) fn check<'tcx>(
                         e.span,
                         "needlessly taken reference of left operand",
                         |diag| {
-                            let lsnip = snippet(cx, l.span, "...").to_string();
-                            diag.span_suggestion(
-                                left.span,
-                                "use the left value directly",
-                                lsnip,
-                                Applicability::MachineApplicable,
-                            );
+                            let mut applicability = Applicability::MachineApplicable;
+                            let (lsnip, _) = snippet_with_context(cx, l.span, e.span.ctxt(), "...", &mut applicability);
+                            diag.span_suggestion(left.span, "use the left value directly", lsnip, applicability);
                         },
                     );
                 } else if !lcpy
@@ -99,7 +96,8 @@ pub(crate) fn check<'tcx>(
                         e.span,
                         "needlessly taken reference of right operand",
                         |diag| {
-                            let rsnip = snippet(cx, r.span, "...").to_string();
+                            let mut applicability = Applicability::MachineApplicable;
+                            let (rsnip, _) = snippet_with_context(cx, r.span, e.span.ctxt(), "...", &mut applicability);
                             diag.span_suggestion(
                                 right.span,
                                 "use the right value directly",
@@ -131,7 +129,8 @@ pub(crate) fn check<'tcx>(
                         e.span,
                         "needlessly taken reference of left operand",
                         |diag| {
-                            let lsnip = snippet(cx, l.span, "...").to_string();
+                            let mut applicability = Applicability::MachineApplicable;
+                            let (lsnip, _) = snippet_with_context(cx, l.span, e.span.ctxt(), "...", &mut applicability);
                             diag.span_suggestion(
                                 left.span,
                                 "use the left value directly",
@@ -158,7 +157,8 @@ pub(crate) fn check<'tcx>(
                     && implements_trait(cx, cx.typeck_results().expr_ty(left), trait_id, &[rty.into()])
                 {
                     span_lint_and_then(cx, OP_REF, e.span, "taken reference of right operand", |diag| {
-                        let rsnip = snippet(cx, r.span, "...").to_string();
+                        let mut applicability = Applicability::MachineApplicable;
+                        let (rsnip, _) = snippet_with_context(cx, r.span, e.span.ctxt(), "...", &mut applicability);
                         diag.span_suggestion(
                             right.span,
                             "use the right value directly",
diff --git a/src/tools/clippy/clippy_lints/src/partialeq_ne_impl.rs b/src/tools/clippy/clippy_lints/src/partialeq_ne_impl.rs
index 8eaf65e6306..301b2cd4bf2 100644
--- a/src/tools/clippy/clippy_lints/src/partialeq_ne_impl.rs
+++ b/src/tools/clippy/clippy_lints/src/partialeq_ne_impl.rs
@@ -43,12 +43,12 @@ impl<'tcx> LateLintPass<'tcx> for PartialEqNeImpl {
             && trait_ref.path.res.def_id() == eq_trait
         {
             for impl_item in *impl_items {
-                if impl_item.ident.name == sym::ne {
+                if cx.tcx.item_name(impl_item.owner_id) == sym::ne {
                     span_lint_hir(
                         cx,
                         PARTIALEQ_NE_IMPL,
-                        impl_item.id.hir_id(),
-                        impl_item.span,
+                        impl_item.hir_id(),
+                        cx.tcx.def_span(impl_item.owner_id),
                         "re-implementing `PartialEq::ne` is unnecessary",
                     );
                 }
diff --git a/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs b/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs
index 84597269a58..1c23fe998ad 100644
--- a/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs
+++ b/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs
@@ -5,9 +5,7 @@ use hir::Param;
 use rustc_errors::Applicability;
 use rustc_hir as hir;
 use rustc_hir::intravisit::{Visitor as HirVisitor, Visitor};
-use rustc_hir::{
-    ClosureKind, CoroutineDesugaring, CoroutineKind, CoroutineSource, ExprKind, Node, intravisit as hir_visit,
-};
+use rustc_hir::{ClosureKind, CoroutineDesugaring, CoroutineKind, CoroutineSource, ExprKind, intravisit as hir_visit};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_middle::hir::nested_filter;
 use rustc_middle::ty;
@@ -198,15 +196,15 @@ impl<'tcx> LateLintPass<'tcx> for RedundantClosureCall {
                             hint = hint.asyncify();
                         }
 
-                        let is_in_fn_call_arg = if let Node::Expr(expr) = cx.tcx.parent_hir_node(expr.hir_id) {
-                            matches!(expr.kind, ExprKind::Call(_, _))
-                        } else {
-                            false
-                        };
-
-                        // avoid clippy::double_parens
-                        if !is_in_fn_call_arg {
-                            hint = hint.maybe_paren();
+                        // If the closure body is a block with a single expression, suggest just the inner expression,
+                        // not the block. Example: `(|| { Some(true) })()` should suggest
+                        // `Some(true)`
+                        if let ExprKind::Block(block, _) = body.kind
+                            && block.stmts.is_empty()
+                            && let Some(expr) = block.expr
+                        {
+                            hint = Sugg::hir_with_context(cx, expr, full_expr.span.ctxt(), "..", &mut applicability)
+                                .maybe_paren();
                         }
 
                         diag.span_suggestion(full_expr.span, "try doing something like", hint, applicability);
diff --git a/src/tools/clippy/clippy_lints/src/same_name_method.rs b/src/tools/clippy/clippy_lints/src/same_name_method.rs
index 226e8ff6adb..85fde780e68 100644
--- a/src/tools/clippy/clippy_lints/src/same_name_method.rs
+++ b/src/tools/clippy/clippy_lints/src/same_name_method.rs
@@ -3,7 +3,7 @@ use rustc_data_structures::fx::FxHashMap;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::{HirId, Impl, ItemKind, Node, Path, QPath, TraitRef, TyKind};
 use rustc_lint::{LateContext, LateLintPass};
-use rustc_middle::ty::AssocItem;
+use rustc_middle::ty::{AssocKind, AssocItem};
 use rustc_session::declare_lint_pass;
 use rustc_span::Span;
 use rustc_span::symbol::Symbol;
@@ -54,7 +54,6 @@ impl<'tcx> LateLintPass<'tcx> for SameNameMethod {
             if matches!(cx.tcx.def_kind(id.owner_id), DefKind::Impl { .. })
                 && let item = cx.tcx.hir_item(id)
                 && let ItemKind::Impl(Impl {
-                    items,
                     of_trait,
                     self_ty,
                     ..
@@ -115,13 +114,11 @@ impl<'tcx> LateLintPass<'tcx> for SameNameMethod {
                             }
                         };
 
-                        for impl_item_ref in (*items)
-                            .iter()
-                            .filter(|impl_item_ref| matches!(impl_item_ref.kind, rustc_hir::AssocItemKind::Fn { .. }))
-                        {
-                            let method_name = impl_item_ref.ident.name;
-                            methods_in_trait.remove(&method_name);
-                            check_trait_method(method_name, impl_item_ref.span);
+                        for assoc_item in cx.tcx.associated_items(id.owner_id).in_definition_order() {
+                            if let AssocKind::Fn { name, .. } = assoc_item.kind {
+                                methods_in_trait.remove(&name);
+                                check_trait_method(name, cx.tcx.def_span(assoc_item.def_id));
+                            }
                         }
 
                         for method_name in methods_in_trait {
@@ -129,14 +126,11 @@ impl<'tcx> LateLintPass<'tcx> for SameNameMethod {
                         }
                     },
                     None => {
-                        for impl_item_ref in (*items)
-                            .iter()
-                            .filter(|impl_item_ref| matches!(impl_item_ref.kind, rustc_hir::AssocItemKind::Fn { .. }))
-                        {
-                            let method_name = impl_item_ref.ident.name;
-                            let impl_span = impl_item_ref.span;
-                            let hir_id = impl_item_ref.id.hir_id();
-                            if let Some(trait_spans) = existing_name.trait_methods.get(&method_name) {
+                        for assoc_item in cx.tcx.associated_items(id.owner_id).in_definition_order() {
+                            let AssocKind::Fn { name, .. } = assoc_item.kind else { continue };
+                            let impl_span = cx.tcx.def_span(assoc_item.def_id);
+                            let hir_id = cx.tcx.local_def_id_to_hir_id(assoc_item.def_id.expect_local());
+                            if let Some(trait_spans) = existing_name.trait_methods.get(&name) {
                                 span_lint_hir_and_then(
                                     cx,
                                     SAME_NAME_METHOD,
@@ -148,12 +142,12 @@ impl<'tcx> LateLintPass<'tcx> for SameNameMethod {
                                         // iterate on trait_spans?
                                         diag.span_note(
                                             trait_spans[0],
-                                            format!("existing `{method_name}` defined here"),
+                                            format!("existing `{name}` defined here"),
                                         );
                                     },
                                 );
                             }
-                            existing_name.impl_methods.insert(method_name, (impl_span, hir_id));
+                            existing_name.impl_methods.insert(name, (impl_span, hir_id));
                         }
                     },
                 }
diff --git a/src/tools/clippy/clippy_lints/src/serde_api.rs b/src/tools/clippy/clippy_lints/src/serde_api.rs
index b36a5d6d502..2de22e4b6a3 100644
--- a/src/tools/clippy/clippy_lints/src/serde_api.rs
+++ b/src/tools/clippy/clippy_lints/src/serde_api.rs
@@ -36,9 +36,9 @@ impl<'tcx> LateLintPass<'tcx> for SerdeApi {
                 let mut seen_str = None;
                 let mut seen_string = None;
                 for item in *items {
-                    match item.ident.name {
-                        sym::visit_str => seen_str = Some(item.span),
-                        sym::visit_string => seen_string = Some(item.span),
+                    match cx.tcx.item_name(item.owner_id) {
+                        sym::visit_str => seen_str = Some(cx.tcx.def_span(item.owner_id)),
+                        sym::visit_string => seen_string = Some(cx.tcx.def_span(item.owner_id)),
                         _ => {},
                     }
                 }
diff --git a/src/tools/clippy/clippy_lints/src/std_instead_of_core.rs b/src/tools/clippy/clippy_lints/src/std_instead_of_core.rs
index 442b3250d86..216f168471e 100644
--- a/src/tools/clippy/clippy_lints/src/std_instead_of_core.rs
+++ b/src/tools/clippy/clippy_lints/src/std_instead_of_core.rs
@@ -1,10 +1,10 @@
 use clippy_config::Conf;
-use clippy_utils::diagnostics::span_lint_and_sugg;
+use clippy_utils::diagnostics::{span_lint_and_help, span_lint_and_sugg};
 use clippy_utils::is_from_proc_macro;
 use clippy_utils::msrvs::Msrv;
 use rustc_attr_data_structures::{StabilityLevel, StableSince};
 use rustc_errors::Applicability;
-use rustc_hir::def::Res;
+use rustc_hir::def::{DefKind, Res};
 use rustc_hir::def_id::DefId;
 use rustc_hir::{Block, Body, HirId, Path, PathSegment};
 use rustc_lint::{LateContext, LateLintPass, Lint, LintContext};
@@ -88,49 +88,52 @@ declare_clippy_lint! {
 }
 
 pub struct StdReexports {
-    lint_point: (Span, Option<LintPoint>),
+    lint_points: Option<(Span, Vec<LintPoint>)>,
     msrv: Msrv,
 }
 
 impl StdReexports {
     pub fn new(conf: &'static Conf) -> Self {
         Self {
-            lint_point: Default::default(),
+            lint_points: Option::default(),
             msrv: conf.msrv,
         }
     }
 
-    fn lint_if_finish(&mut self, cx: &LateContext<'_>, (span, item): (Span, Option<LintPoint>)) {
-        if span.source_equal(self.lint_point.0) {
-            return;
+    fn lint_if_finish(&mut self, cx: &LateContext<'_>, krate: Span, lint_point: LintPoint) {
+        match &mut self.lint_points {
+            Some((prev_krate, prev_lints)) if prev_krate.overlaps(krate) => {
+                prev_lints.push(lint_point);
+            },
+            _ => emit_lints(cx, self.lint_points.replace((krate, vec![lint_point]))),
         }
-
-        if !self.lint_point.0.is_dummy() {
-            emit_lints(cx, &self.lint_point);
-        }
-
-        self.lint_point = (span, item);
     }
 }
 
 impl_lint_pass!(StdReexports => [STD_INSTEAD_OF_CORE, STD_INSTEAD_OF_ALLOC, ALLOC_INSTEAD_OF_CORE]);
 
-type LintPoint = (&'static Lint, &'static str, &'static str);
+#[derive(Debug)]
+enum LintPoint {
+    Available(Span, &'static Lint, &'static str, &'static str),
+    Conflict,
+}
 
 impl<'tcx> LateLintPass<'tcx> for StdReexports {
     fn check_path(&mut self, cx: &LateContext<'tcx>, path: &Path<'tcx>, _: HirId) {
-        if let Res::Def(_, def_id) = path.res
+        if let Res::Def(def_kind, def_id) = path.res
             && let Some(first_segment) = get_first_segment(path)
             && is_stable(cx, def_id, self.msrv)
             && !path.span.in_external_macro(cx.sess().source_map())
             && !is_from_proc_macro(cx, &first_segment.ident)
+            && !matches!(def_kind, DefKind::Macro(_))
+            && let Some(last_segment) = path.segments.last()
         {
             let (lint, used_mod, replace_with) = match first_segment.ident.name {
                 sym::std => match cx.tcx.crate_name(def_id.krate) {
                     sym::core => (STD_INSTEAD_OF_CORE, "std", "core"),
                     sym::alloc => (STD_INSTEAD_OF_ALLOC, "std", "alloc"),
                     _ => {
-                        self.lint_if_finish(cx, (first_segment.ident.span, None));
+                        self.lint_if_finish(cx, first_segment.ident.span, LintPoint::Conflict);
                         return;
                     },
                 },
@@ -138,44 +141,84 @@ impl<'tcx> LateLintPass<'tcx> for StdReexports {
                     if cx.tcx.crate_name(def_id.krate) == sym::core {
                         (ALLOC_INSTEAD_OF_CORE, "alloc", "core")
                     } else {
-                        self.lint_if_finish(cx, (first_segment.ident.span, None));
+                        self.lint_if_finish(cx, first_segment.ident.span, LintPoint::Conflict);
                         return;
                     }
                 },
-                _ => return,
+                _ => {
+                    self.lint_if_finish(cx, first_segment.ident.span, LintPoint::Conflict);
+                    return;
+                },
             };
 
-            self.lint_if_finish(cx, (first_segment.ident.span, Some((lint, used_mod, replace_with))));
+            self.lint_if_finish(
+                cx,
+                first_segment.ident.span,
+                LintPoint::Available(last_segment.ident.span, lint, used_mod, replace_with),
+            );
         }
     }
 
     fn check_block_post(&mut self, cx: &LateContext<'tcx>, _: &Block<'tcx>) {
-        self.lint_if_finish(cx, Default::default());
+        emit_lints(cx, self.lint_points.take());
     }
 
     fn check_body_post(&mut self, cx: &LateContext<'tcx>, _: &Body<'tcx>) {
-        self.lint_if_finish(cx, Default::default());
+        emit_lints(cx, self.lint_points.take());
     }
 
     fn check_crate_post(&mut self, cx: &LateContext<'tcx>) {
-        self.lint_if_finish(cx, Default::default());
+        emit_lints(cx, self.lint_points.take());
     }
 }
 
-fn emit_lints(cx: &LateContext<'_>, (span, item): &(Span, Option<LintPoint>)) {
-    let Some((lint, used_mod, replace_with)) = item else {
+fn emit_lints(cx: &LateContext<'_>, lint_points: Option<(Span, Vec<LintPoint>)>) {
+    let Some((krate_span, lint_points)) = lint_points else {
         return;
     };
 
-    span_lint_and_sugg(
-        cx,
-        lint,
-        *span,
-        format!("used import from `{used_mod}` instead of `{replace_with}`"),
-        format!("consider importing the item from `{replace_with}`"),
-        (*replace_with).to_string(),
-        Applicability::MachineApplicable,
-    );
+    let mut lint: Option<(&'static Lint, &'static str, &'static str)> = None;
+    let mut has_conflict = false;
+    for lint_point in &lint_points {
+        match lint_point {
+            LintPoint::Available(_, l, used_mod, replace_with)
+                if lint.is_none_or(|(prev_l, ..)| l.name == prev_l.name) =>
+            {
+                lint = Some((l, used_mod, replace_with));
+            },
+            _ => {
+                has_conflict = true;
+                break;
+            },
+        }
+    }
+
+    if !has_conflict && let Some((lint, used_mod, replace_with)) = lint {
+        span_lint_and_sugg(
+            cx,
+            lint,
+            krate_span,
+            format!("used import from `{used_mod}` instead of `{replace_with}`"),
+            format!("consider importing the item from `{replace_with}`"),
+            (*replace_with).to_string(),
+            Applicability::MachineApplicable,
+        );
+        return;
+    }
+
+    for lint_point in lint_points {
+        let LintPoint::Available(span, lint, used_mod, replace_with) = lint_point else {
+            continue;
+        };
+        span_lint_and_help(
+            cx,
+            lint,
+            span,
+            format!("used import from `{used_mod}` instead of `{replace_with}`"),
+            None,
+            format!("consider importing the item from `{replace_with}`"),
+        );
+    }
 }
 
 /// Returns the first named segment of a [`Path`].
@@ -206,7 +249,7 @@ fn is_stable(cx: &LateContext<'_>, mut def_id: DefId, msrv: Msrv) -> bool {
             let stable = match since {
                 StableSince::Version(v) => msrv.meets(cx, v),
                 StableSince::Current => msrv.current(cx).is_none(),
-                StableSince::Err => false,
+                StableSince::Err(_) => false,
             };
 
             if !stable {
diff --git a/src/tools/clippy/clippy_lints/src/trait_bounds.rs b/src/tools/clippy/clippy_lints/src/trait_bounds.rs
index 45e54302e32..9182a55081f 100644
--- a/src/tools/clippy/clippy_lints/src/trait_bounds.rs
+++ b/src/tools/clippy/clippy_lints/src/trait_bounds.rs
@@ -112,7 +112,7 @@ impl<'tcx> LateLintPass<'tcx> for TraitBounds {
         // special handling for self trait bounds as these are not considered generics
         // ie. trait Foo: Display {}
         if let Item {
-            kind: ItemKind::Trait(_, _, _, _, bounds, ..),
+            kind: ItemKind::Trait(_, _, _, _, _, bounds, ..),
             ..
         } = item
         {
@@ -133,7 +133,7 @@ impl<'tcx> LateLintPass<'tcx> for TraitBounds {
                     ..
                 }) = segments.first()
                 && let Some(Node::Item(Item {
-                    kind: ItemKind::Trait(_, _, _, _, self_bounds, _),
+                    kind: ItemKind::Trait(_, _, _, _, _, self_bounds, _),
                     ..
                 })) = cx.tcx.hir_get_if_local(*def_id)
             {
diff --git a/src/tools/clippy/clippy_lints/src/undocumented_unsafe_blocks.rs b/src/tools/clippy/clippy_lints/src/undocumented_unsafe_blocks.rs
index 6cc4b589a72..cf603c6190b 100644
--- a/src/tools/clippy/clippy_lints/src/undocumented_unsafe_blocks.rs
+++ b/src/tools/clippy/clippy_lints/src/undocumented_unsafe_blocks.rs
@@ -9,7 +9,7 @@ use clippy_utils::visitors::{Descend, for_each_expr};
 use hir::HirId;
 use rustc_hir as hir;
 use rustc_hir::{Block, BlockCheckMode, ItemKind, Node, UnsafeSource};
-use rustc_lexer::{TokenKind, tokenize};
+use rustc_lexer::{FrontmatterAllowed, TokenKind, tokenize};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_session::impl_lint_pass;
 use rustc_span::{BytePos, Pos, RelativeBytePos, Span, SyntaxContext};
@@ -143,7 +143,8 @@ impl<'tcx> LateLintPass<'tcx> for UndocumentedUnsafeBlocks {
         if let Some(tail) = block.expr
             && !is_lint_allowed(cx, UNNECESSARY_SAFETY_COMMENT, tail.hir_id)
             && !tail.span.in_external_macro(cx.tcx.sess.source_map())
-            && let HasSafetyComment::Yes(pos) = stmt_has_safety_comment(cx, tail.span, tail.hir_id)
+            && let HasSafetyComment::Yes(pos) =
+                stmt_has_safety_comment(cx, tail.span, tail.hir_id, self.accept_comment_above_attributes)
             && let Some(help_span) = expr_has_unnecessary_safety_comment(cx, tail, pos)
         {
             span_lint_and_then(
@@ -167,7 +168,8 @@ impl<'tcx> LateLintPass<'tcx> for UndocumentedUnsafeBlocks {
         };
         if !is_lint_allowed(cx, UNNECESSARY_SAFETY_COMMENT, stmt.hir_id)
             && !stmt.span.in_external_macro(cx.tcx.sess.source_map())
-            && let HasSafetyComment::Yes(pos) = stmt_has_safety_comment(cx, stmt.span, stmt.hir_id)
+            && let HasSafetyComment::Yes(pos) =
+                stmt_has_safety_comment(cx, stmt.span, stmt.hir_id, self.accept_comment_above_attributes)
             && let Some(help_span) = expr_has_unnecessary_safety_comment(cx, expr, pos)
         {
             span_lint_and_then(
@@ -540,7 +542,12 @@ fn item_has_safety_comment(cx: &LateContext<'_>, item: &hir::Item<'_>) -> HasSaf
 
 /// Checks if the lines immediately preceding the item contain a safety comment.
 #[allow(clippy::collapsible_match)]
-fn stmt_has_safety_comment(cx: &LateContext<'_>, span: Span, hir_id: HirId) -> HasSafetyComment {
+fn stmt_has_safety_comment(
+    cx: &LateContext<'_>,
+    span: Span,
+    hir_id: HirId,
+    accept_comment_above_attributes: bool,
+) -> HasSafetyComment {
     match span_from_macro_expansion_has_safety_comment(cx, span) {
         HasSafetyComment::Maybe => (),
         has_safety_comment => return has_safety_comment,
@@ -555,6 +562,13 @@ fn stmt_has_safety_comment(cx: &LateContext<'_>, span: Span, hir_id: HirId) -> H
         _ => return HasSafetyComment::Maybe,
     };
 
+    // if span_with_attrs_has_safety_comment(cx, span, hir_id, accept_comment_above_attrib
+    // }
+    let mut span = span;
+    if accept_comment_above_attributes {
+        span = include_attrs_in_span(cx, hir_id, span);
+    }
+
     let source_map = cx.sess().source_map();
     if let Some(comment_start) = comment_start
         && let Ok(unsafe_line) = source_map.lookup_line(span.lo())
@@ -746,7 +760,7 @@ fn text_has_safety_comment(src: &str, line_starts: &[RelativeBytePos], start_pos
     loop {
         if line.starts_with("/*") {
             let src = &src[line_start..line_starts.last().unwrap().to_usize()];
-            let mut tokens = tokenize(src);
+            let mut tokens = tokenize(src, FrontmatterAllowed::No);
             return (src[..tokens.next().unwrap().len as usize]
                 .to_ascii_uppercase()
                 .contains("SAFETY:")
diff --git a/src/tools/clippy/clippy_lints/src/unused_async.rs b/src/tools/clippy/clippy_lints/src/unused_async.rs
index 8ceaa3dc58e..e67afc7f5a8 100644
--- a/src/tools/clippy/clippy_lints/src/unused_async.rs
+++ b/src/tools/clippy/clippy_lints/src/unused_async.rs
@@ -169,7 +169,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedAsync {
         let iter = self
             .unused_async_fns
             .iter()
-            .filter(|UnusedAsyncFn { def_id, .. }| (!self.async_fns_as_value.contains(def_id)));
+            .filter(|UnusedAsyncFn { def_id, .. }| !self.async_fns_as_value.contains(def_id));
 
         for fun in iter {
             span_lint_hir_and_then(
diff --git a/src/tools/clippy/clippy_lints/src/unused_trait_names.rs b/src/tools/clippy/clippy_lints/src/unused_trait_names.rs
index 610cec7b8c8..b7a1d5b2123 100644
--- a/src/tools/clippy/clippy_lints/src/unused_trait_names.rs
+++ b/src/tools/clippy/clippy_lints/src/unused_trait_names.rs
@@ -65,7 +65,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedTraitNames {
             && ident.name != kw::Underscore
             // Only check traits
             && let Some(Res::Def(DefKind::Trait, _)) = path.res.type_ns
-            && cx.tcx.maybe_unused_trait_imports(()).contains(&item.owner_id.def_id)
+            && cx.tcx.resolutions(()).maybe_unused_trait_imports.contains(&item.owner_id.def_id)
             // Only check this import if it is visible to its module only (no pub, pub(crate), ...)
             && let module = cx.tcx.parent_module_from_def_id(item.owner_id.def_id)
             && cx.tcx.visibility(item.owner_id.def_id) == Visibility::Restricted(module.to_def_id())
diff --git a/src/tools/clippy/clippy_lints/src/upper_case_acronyms.rs b/src/tools/clippy/clippy_lints/src/upper_case_acronyms.rs
index 02281b9e922..944cd91a7fd 100644
--- a/src/tools/clippy/clippy_lints/src/upper_case_acronyms.rs
+++ b/src/tools/clippy/clippy_lints/src/upper_case_acronyms.rs
@@ -131,7 +131,7 @@ impl LateLintPass<'_> for UpperCaseAcronyms {
             return;
         }
         match it.kind {
-            ItemKind::TyAlias(ident, ..) | ItemKind::Struct(ident, ..) | ItemKind::Trait(_, _, ident, ..) => {
+            ItemKind::TyAlias(ident, ..) | ItemKind::Struct(ident, ..) | ItemKind::Trait(_, _, _, ident, ..) => {
                 check_ident(cx, &ident, it.hir_id(), self.upper_case_acronyms_aggressive);
             },
             ItemKind::Enum(ident, _, ref enumdef) => {
diff --git a/src/tools/clippy/clippy_lints/src/utils/format_args_collector.rs b/src/tools/clippy/clippy_lints/src/utils/format_args_collector.rs
index 8f314ce7a60..6629a67f78b 100644
--- a/src/tools/clippy/clippy_lints/src/utils/format_args_collector.rs
+++ b/src/tools/clippy/clippy_lints/src/utils/format_args_collector.rs
@@ -3,7 +3,7 @@ use clippy_utils::source::SpanRangeExt;
 use itertools::Itertools;
 use rustc_ast::{Crate, Expr, ExprKind, FormatArgs};
 use rustc_data_structures::fx::FxHashMap;
-use rustc_lexer::{TokenKind, tokenize};
+use rustc_lexer::{FrontmatterAllowed, TokenKind, tokenize};
 use rustc_lint::{EarlyContext, EarlyLintPass};
 use rustc_session::impl_lint_pass;
 use rustc_span::{Span, hygiene};
@@ -82,7 +82,7 @@ fn has_span_from_proc_macro(cx: &EarlyContext<'_>, args: &FormatArgs) -> bool {
         .all(|sp| {
             sp.check_source_text(cx, |src| {
                 // text should be either `, name` or `, name =`
-                let mut iter = tokenize(src).filter(|t| {
+                let mut iter = tokenize(src, FrontmatterAllowed::No).filter(|t| {
                     !matches!(
                         t.kind,
                         TokenKind::LineComment { .. } | TokenKind::BlockComment { .. } | TokenKind::Whitespace
diff --git a/src/tools/clippy/clippy_lints_internal/src/derive_deserialize_allowing_unknown.rs b/src/tools/clippy/clippy_lints_internal/src/derive_deserialize_allowing_unknown.rs
index a1dacd359a0..88b099c477f 100644
--- a/src/tools/clippy/clippy_lints_internal/src/derive_deserialize_allowing_unknown.rs
+++ b/src/tools/clippy/clippy_lints_internal/src/derive_deserialize_allowing_unknown.rs
@@ -88,7 +88,7 @@ impl<'tcx> LateLintPass<'tcx> for DeriveDeserializeAllowingUnknown {
         }
 
         // Is it derived?
-        if !cx.tcx.has_attr(item.owner_id, sym::automatically_derived) {
+        if !find_attr!(cx.tcx.get_all_attrs(item.owner_id), AttributeKind::AutomaticallyDerived(..)) {
             return;
         }
 
diff --git a/src/tools/clippy/clippy_lints_internal/src/symbols.rs b/src/tools/clippy/clippy_lints_internal/src/symbols.rs
index 7b5d58824c3..74712097e71 100644
--- a/src/tools/clippy/clippy_lints_internal/src/symbols.rs
+++ b/src/tools/clippy/clippy_lints_internal/src/symbols.rs
@@ -65,7 +65,7 @@ pub struct Symbols {
 impl_lint_pass!(Symbols => [INTERNING_LITERALS, SYMBOL_AS_STR]);
 
 impl Symbols {
-    fn lit_suggestion(&self, lit: &Lit) -> Option<(Span, String)> {
+    fn lit_suggestion(&self, lit: Lit) -> Option<(Span, String)> {
         if let LitKind::Str(name, _) = lit.node {
             let sugg = if let Some((prefix, name)) = self.symbol_map.get(&name.as_u32()) {
                 format!("{prefix}::{name}")
diff --git a/src/tools/clippy/clippy_test_deps/Cargo.lock b/src/tools/clippy/clippy_test_deps/Cargo.lock
new file mode 100644
index 00000000000..5be404f24e6
--- /dev/null
+++ b/src/tools/clippy/clippy_test_deps/Cargo.lock
@@ -0,0 +1,506 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "addr2line"
+version = "0.24.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dfbe277e56a376000877090da837660b4427aad530e3028d44e0bffe4f89a1c1"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler2"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
+
+[[package]]
+name = "aho-corasick"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
+dependencies = [
+ "memchr",
+]
+
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+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
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+
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diff --git a/src/tools/clippy/clippy_test_deps/Cargo.toml b/src/tools/clippy/clippy_test_deps/Cargo.toml
new file mode 100644
index 00000000000..fcedc5d4843
--- /dev/null
+++ b/src/tools/clippy/clippy_test_deps/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name = "clippy_test_deps"
+version = "0.1.0"
+edition = "2021"
+
+# Add dependencies here to make them available in ui tests.
+
+[dependencies]
+libc = "0.2"
+regex = "1.5.5"
+serde = { version = "1.0.145", features = ["derive"] }
+if_chain = "1.0"
+quote = "1.0.25"
+syn = { version = "2.0", features = ["full"] }
+futures = "0.3"
+parking_lot = "0.12"
+tokio = { version = "1", features = ["io-util"] }
+itertools = "0.12"
+
+# Make sure we are not part of the rustc workspace.
+[workspace]
diff --git a/src/tools/miri/test_dependencies/src/main.rs b/src/tools/clippy/clippy_test_deps/src/main.rs
index f328e4d9d04..f328e4d9d04 100644
--- a/src/tools/miri/test_dependencies/src/main.rs
+++ b/src/tools/clippy/clippy_test_deps/src/main.rs
diff --git a/src/tools/clippy/clippy_utils/README.md b/src/tools/clippy/clippy_utils/README.md
index 649748d1534..645b644d9f4 100644
--- a/src/tools/clippy/clippy_utils/README.md
+++ b/src/tools/clippy/clippy_utils/README.md
@@ -8,7 +8,7 @@ This crate is only guaranteed to build with this `nightly` toolchain:
 
 <!-- begin autogenerated nightly -->
 ```
-nightly-2025-06-26
+nightly-2025-07-10
 ```
 <!-- end autogenerated nightly -->
 
diff --git a/src/tools/clippy/clippy_utils/src/ast_utils/mod.rs b/src/tools/clippy/clippy_utils/src/ast_utils/mod.rs
index 42254ec8e92..96f0273c439 100644
--- a/src/tools/clippy/clippy_utils/src/ast_utils/mod.rs
+++ b/src/tools/clippy/clippy_utils/src/ast_utils/mod.rs
@@ -444,6 +444,7 @@ pub fn eq_item_kind(l: &ItemKind, r: &ItemKind) -> bool {
         },
         (
             Trait(box ast::Trait {
+                constness: lc,
                 is_auto: la,
                 safety: lu,
                 ident: li,
@@ -452,6 +453,7 @@ pub fn eq_item_kind(l: &ItemKind, r: &ItemKind) -> bool {
                 items: lis,
             }),
             Trait(box ast::Trait {
+                constness: rc,
                 is_auto: ra,
                 safety: ru,
                 ident: ri,
@@ -460,7 +462,8 @@ pub fn eq_item_kind(l: &ItemKind, r: &ItemKind) -> bool {
                 items: ris,
             }),
         ) => {
-            la == ra
+            matches!(lc, ast::Const::No) == matches!(rc, ast::Const::No)
+                && la == ra
                 && matches!(lu, Safety::Default) == matches!(ru, Safety::Default)
                 && eq_id(*li, *ri)
                 && eq_generics(lg, rg)
diff --git a/src/tools/clippy/clippy_utils/src/attrs.rs b/src/tools/clippy/clippy_utils/src/attrs.rs
index 4c7a589e185..34472eaab93 100644
--- a/src/tools/clippy/clippy_utils/src/attrs.rs
+++ b/src/tools/clippy/clippy_utils/src/attrs.rs
@@ -1,5 +1,8 @@
+use crate::source::SpanRangeExt;
+use crate::{sym, tokenize_with_text};
 use rustc_ast::attr;
 use rustc_ast::attr::AttributeExt;
+use rustc_attr_data_structures::{AttributeKind, find_attr};
 use rustc_errors::Applicability;
 use rustc_lexer::TokenKind;
 use rustc_lint::LateContext;
@@ -7,10 +10,6 @@ use rustc_middle::ty::{AdtDef, TyCtxt};
 use rustc_session::Session;
 use rustc_span::{Span, Symbol};
 use std::str::FromStr;
-use rustc_attr_data_structures::find_attr;
-use crate::source::SpanRangeExt;
-use crate::{sym, tokenize_with_text};
-use rustc_attr_data_structures::AttributeKind;
 
 /// Deprecation status of attributes known by Clippy.
 pub enum DeprecationStatus {
@@ -168,7 +167,8 @@ pub fn has_non_exhaustive_attr(tcx: TyCtxt<'_>, adt: AdtDef<'_>) -> bool {
     adt.is_variant_list_non_exhaustive()
         || find_attr!(tcx.get_all_attrs(adt.did()), AttributeKind::NonExhaustive(..))
         || adt.variants().iter().any(|variant_def| {
-            variant_def.is_field_list_non_exhaustive() || find_attr!(tcx.get_all_attrs(variant_def.def_id), AttributeKind::NonExhaustive(..))
+            variant_def.is_field_list_non_exhaustive()
+                || find_attr!(tcx.get_all_attrs(variant_def.def_id), AttributeKind::NonExhaustive(..))
         })
         || adt
             .all_fields()
diff --git a/src/tools/clippy/clippy_utils/src/check_proc_macro.rs b/src/tools/clippy/clippy_utils/src/check_proc_macro.rs
index ce61fffe0de..dc31ed08fb7 100644
--- a/src/tools/clippy/clippy_utils/src/check_proc_macro.rs
+++ b/src/tools/clippy/clippy_utils/src/check_proc_macro.rs
@@ -252,11 +252,11 @@ fn item_search_pat(item: &Item<'_>) -> (Pat, Pat) {
         ItemKind::Struct(_, _, VariantData::Struct { .. }) => (Pat::Str("struct"), Pat::Str("}")),
         ItemKind::Struct(..) => (Pat::Str("struct"), Pat::Str(";")),
         ItemKind::Union(..) => (Pat::Str("union"), Pat::Str("}")),
-        ItemKind::Trait(_, Safety::Unsafe, ..)
+        ItemKind::Trait(_, _, Safety::Unsafe, ..)
         | ItemKind::Impl(Impl {
             safety: Safety::Unsafe, ..
         }) => (Pat::Str("unsafe"), Pat::Str("}")),
-        ItemKind::Trait(IsAuto::Yes, ..) => (Pat::Str("auto"), Pat::Str("}")),
+        ItemKind::Trait(_, IsAuto::Yes, ..) => (Pat::Str("auto"), Pat::Str("}")),
         ItemKind::Trait(..) => (Pat::Str("trait"), Pat::Str("}")),
         ItemKind::Impl(_) => (Pat::Str("impl"), Pat::Str("}")),
         _ => return (Pat::Str(""), Pat::Str("")),
diff --git a/src/tools/clippy/clippy_utils/src/consts.rs b/src/tools/clippy/clippy_utils/src/consts.rs
index ba0376e4d40..25afa12e95d 100644
--- a/src/tools/clippy/clippy_utils/src/consts.rs
+++ b/src/tools/clippy/clippy_utils/src/consts.rs
@@ -15,7 +15,7 @@ use rustc_hir::def::{DefKind, Res};
 use rustc_hir::{
     BinOpKind, Block, ConstBlock, Expr, ExprKind, HirId, Item, ItemKind, Node, PatExpr, PatExprKind, QPath, UnOp,
 };
-use rustc_lexer::tokenize;
+use rustc_lexer::{FrontmatterAllowed, tokenize};
 use rustc_lint::LateContext;
 use rustc_middle::mir::ConstValue;
 use rustc_middle::mir::interpret::{Scalar, alloc_range};
@@ -304,9 +304,7 @@ pub fn lit_to_mir_constant<'tcx>(lit: &LitKind, ty: Option<Ty<'tcx>>) -> Constan
     match *lit {
         LitKind::Str(ref is, _) => Constant::Str(is.to_string()),
         LitKind::Byte(b) => Constant::Int(u128::from(b)),
-        LitKind::ByteStr(ref s, _) | LitKind::CStr(ref s, _) => {
-            Constant::Binary(s.as_byte_str().to_vec())
-        }
+        LitKind::ByteStr(ref s, _) | LitKind::CStr(ref s, _) => Constant::Binary(s.as_byte_str().to_vec()),
         LitKind::Char(c) => Constant::Char(c),
         LitKind::Int(n, _) => Constant::Int(n.get()),
         LitKind::Float(ref is, LitFloatType::Suffixed(fty)) => match fty {
@@ -568,9 +566,7 @@ impl<'tcx> ConstEvalCtxt<'tcx> {
                 } else {
                     match &lit.node {
                         LitKind::Str(is, _) => Some(is.is_empty()),
-                        LitKind::ByteStr(s, _) | LitKind::CStr(s, _) => {
-                            Some(s.as_byte_str().is_empty())
-                        }
+                        LitKind::ByteStr(s, _) | LitKind::CStr(s, _) => Some(s.as_byte_str().is_empty()),
                         _ => None,
                     }
                 }
@@ -715,7 +711,7 @@ impl<'tcx> ConstEvalCtxt<'tcx> {
                     && let Some(src) = src.as_str()
                 {
                     use rustc_lexer::TokenKind::{BlockComment, LineComment, OpenBrace, Semi, Whitespace};
-                    if !tokenize(src)
+                    if !tokenize(src, FrontmatterAllowed::No)
                         .map(|t| t.kind)
                         .filter(|t| !matches!(t, Whitespace | LineComment { .. } | BlockComment { .. } | Semi))
                         .eq([OpenBrace])
diff --git a/src/tools/clippy/clippy_utils/src/higher.rs b/src/tools/clippy/clippy_utils/src/higher.rs
index 6971b488013..4e0b00df950 100644
--- a/src/tools/clippy/clippy_utils/src/higher.rs
+++ b/src/tools/clippy/clippy_utils/src/higher.rs
@@ -54,7 +54,7 @@ impl<'tcx> ForLoop<'tcx> {
     }
 }
 
-/// An `if` expression without `DropTemps`
+/// An `if` expression without `let`
 pub struct If<'hir> {
     /// `if` condition
     pub cond: &'hir Expr<'hir>,
@@ -66,16 +66,10 @@ pub struct If<'hir> {
 
 impl<'hir> If<'hir> {
     #[inline]
-    /// Parses an `if` expression
+    /// Parses an `if` expression without `let`
     pub const fn hir(expr: &Expr<'hir>) -> Option<Self> {
-        if let ExprKind::If(
-            Expr {
-                kind: ExprKind::DropTemps(cond),
-                ..
-            },
-            then,
-            r#else,
-        ) = expr.kind
+        if let ExprKind::If(cond, then, r#else) = expr.kind
+            && !has_let_expr(cond)
         {
             Some(Self { cond, then, r#else })
         } else {
@@ -198,18 +192,10 @@ impl<'hir> IfOrIfLet<'hir> {
     /// Parses an `if` or `if let` expression
     pub const fn hir(expr: &Expr<'hir>) -> Option<Self> {
         if let ExprKind::If(cond, then, r#else) = expr.kind {
-            if let ExprKind::DropTemps(new_cond) = cond.kind {
-                return Some(Self {
-                    cond: new_cond,
-                    then,
-                    r#else,
-                });
-            }
-            if let ExprKind::Let(..) = cond.kind {
-                return Some(Self { cond, then, r#else });
-            }
+            Some(Self { cond, then, r#else })
+        } else {
+            None
         }
-        None
     }
 }
 
@@ -343,15 +329,7 @@ impl<'hir> While<'hir> {
             Block {
                 expr:
                     Some(Expr {
-                        kind:
-                            ExprKind::If(
-                                Expr {
-                                    kind: ExprKind::DropTemps(condition),
-                                    ..
-                                },
-                                body,
-                                _,
-                            ),
+                        kind: ExprKind::If(condition, body, _),
                         ..
                     }),
                 ..
@@ -360,6 +338,7 @@ impl<'hir> While<'hir> {
             LoopSource::While,
             span,
         ) = expr.kind
+            && !has_let_expr(condition)
         {
             return Some(Self { condition, body, span });
         }
@@ -493,3 +472,13 @@ pub fn get_vec_init_kind<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -
     }
     None
 }
+
+/// Checks that a condition doesn't have a `let` expression, to keep `If` and `While` from accepting
+/// `if let` and `while let`.
+pub const fn has_let_expr<'tcx>(cond: &'tcx Expr<'tcx>) -> bool {
+    match &cond.kind {
+        ExprKind::Let(_) => true,
+        ExprKind::Binary(_, lhs, rhs) => has_let_expr(lhs) || has_let_expr(rhs),
+        _ => false,
+    }
+}
diff --git a/src/tools/clippy/clippy_utils/src/hir_utils.rs b/src/tools/clippy/clippy_utils/src/hir_utils.rs
index 0ca494f16e3..f0d7fb89c44 100644
--- a/src/tools/clippy/clippy_utils/src/hir_utils.rs
+++ b/src/tools/clippy/clippy_utils/src/hir_utils.rs
@@ -2,6 +2,7 @@ use crate::consts::ConstEvalCtxt;
 use crate::macros::macro_backtrace;
 use crate::source::{SpanRange, SpanRangeExt, walk_span_to_context};
 use crate::tokenize_with_text;
+use rustc_ast::ast;
 use rustc_ast::ast::InlineAsmTemplatePiece;
 use rustc_data_structures::fx::FxHasher;
 use rustc_hir::MatchSource::TryDesugar;
@@ -9,10 +10,10 @@ use rustc_hir::def::{DefKind, Res};
 use rustc_hir::{
     AssocItemConstraint, BinOpKind, BindingMode, Block, BodyId, Closure, ConstArg, ConstArgKind, Expr, ExprField,
     ExprKind, FnRetTy, GenericArg, GenericArgs, HirId, HirIdMap, InlineAsmOperand, LetExpr, Lifetime, LifetimeKind,
-    Pat, PatExpr, PatExprKind, PatField, PatKind, Path, PathSegment, PrimTy, QPath, Stmt, StmtKind, StructTailExpr,
-    TraitBoundModifiers, Ty, TyKind, TyPat, TyPatKind,
+    Node, Pat, PatExpr, PatExprKind, PatField, PatKind, Path, PathSegment, PrimTy, QPath, Stmt, StmtKind,
+    StructTailExpr, TraitBoundModifiers, Ty, TyKind, TyPat, TyPatKind,
 };
-use rustc_lexer::{TokenKind, tokenize};
+use rustc_lexer::{FrontmatterAllowed, TokenKind, tokenize};
 use rustc_lint::LateContext;
 use rustc_middle::ty::TypeckResults;
 use rustc_span::{BytePos, ExpnKind, MacroKind, Symbol, SyntaxContext, sym};
@@ -686,7 +687,7 @@ fn reduce_exprkind<'hir>(cx: &LateContext<'_>, kind: &'hir ExprKind<'hir>) -> &'
             // `{}` => `()`
             ([], None)
                 if block.span.check_source_text(cx, |src| {
-                    tokenize(src)
+                    tokenize(src, FrontmatterAllowed::No)
                         .map(|t| t.kind)
                         .filter(|t| {
                             !matches!(
@@ -1004,8 +1005,8 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> {
                     self.hash_expr(e);
                 }
             },
-            ExprKind::Match(e, arms, s) => {
-                self.hash_expr(e);
+            ExprKind::Match(scrutinee, arms, _) => {
+                self.hash_expr(scrutinee);
 
                 for arm in *arms {
                     self.hash_pat(arm.pat);
@@ -1014,8 +1015,6 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> {
                     }
                     self.hash_expr(arm.body);
                 }
-
-                s.hash(&mut self.s);
             },
             ExprKind::MethodCall(path, receiver, args, _fn_span) => {
                 self.hash_name(path.ident.name);
@@ -1058,8 +1057,8 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> {
             ExprKind::Use(expr, _) => {
                 self.hash_expr(expr);
             },
-            ExprKind::Unary(lop, le) => {
-                std::mem::discriminant(lop).hash(&mut self.s);
+            ExprKind::Unary(l_op, le) => {
+                std::mem::discriminant(l_op).hash(&mut self.s);
                 self.hash_expr(le);
             },
             ExprKind::UnsafeBinderCast(kind, expr, ty) => {
@@ -1394,3 +1393,70 @@ fn eq_span_tokens(
     }
     f(cx, left.into_range(), right.into_range(), pred)
 }
+
+/// Returns true if the expression contains ambiguous literals (unsuffixed float or int literals)
+/// that could be interpreted as either f32/f64 or i32/i64 depending on context.
+pub fn has_ambiguous_literal_in_expr(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
+    match expr.kind {
+        ExprKind::Path(ref qpath) => {
+            if let Res::Local(hir_id) = cx.qpath_res(qpath, expr.hir_id)
+                && let Node::LetStmt(local) = cx.tcx.parent_hir_node(hir_id)
+                && local.ty.is_none()
+                && let Some(init) = local.init
+            {
+                return has_ambiguous_literal_in_expr(cx, init);
+            }
+            false
+        },
+        ExprKind::Lit(lit) => matches!(
+            lit.node,
+            ast::LitKind::Float(_, ast::LitFloatType::Unsuffixed) | ast::LitKind::Int(_, ast::LitIntType::Unsuffixed)
+        ),
+
+        ExprKind::Array(exprs) | ExprKind::Tup(exprs) => exprs.iter().any(|e| has_ambiguous_literal_in_expr(cx, e)),
+
+        ExprKind::Assign(lhs, rhs, _) | ExprKind::AssignOp(_, lhs, rhs) | ExprKind::Binary(_, lhs, rhs) => {
+            has_ambiguous_literal_in_expr(cx, lhs) || has_ambiguous_literal_in_expr(cx, rhs)
+        },
+
+        ExprKind::Unary(_, e)
+        | ExprKind::Cast(e, _)
+        | ExprKind::Type(e, _)
+        | ExprKind::DropTemps(e)
+        | ExprKind::AddrOf(_, _, e)
+        | ExprKind::Field(e, _)
+        | ExprKind::Index(e, _, _)
+        | ExprKind::Yield(e, _) => has_ambiguous_literal_in_expr(cx, e),
+
+        ExprKind::MethodCall(_, receiver, args, _) | ExprKind::Call(receiver, args) => {
+            has_ambiguous_literal_in_expr(cx, receiver) || args.iter().any(|e| has_ambiguous_literal_in_expr(cx, e))
+        },
+
+        ExprKind::Closure(Closure { body, .. }) => {
+            let body = cx.tcx.hir_body(*body);
+            let closure_expr = crate::peel_blocks(body.value);
+            has_ambiguous_literal_in_expr(cx, closure_expr)
+        },
+
+        ExprKind::Block(blk, _) => blk.expr.as_ref().is_some_and(|e| has_ambiguous_literal_in_expr(cx, e)),
+
+        ExprKind::If(cond, then_expr, else_expr) => {
+            has_ambiguous_literal_in_expr(cx, cond)
+                || has_ambiguous_literal_in_expr(cx, then_expr)
+                || else_expr.as_ref().is_some_and(|e| has_ambiguous_literal_in_expr(cx, e))
+        },
+
+        ExprKind::Match(scrutinee, arms, _) => {
+            has_ambiguous_literal_in_expr(cx, scrutinee)
+                || arms.iter().any(|arm| has_ambiguous_literal_in_expr(cx, arm.body))
+        },
+
+        ExprKind::Loop(body, ..) => body.expr.is_some_and(|e| has_ambiguous_literal_in_expr(cx, e)),
+
+        ExprKind::Ret(opt_expr) | ExprKind::Break(_, opt_expr) => {
+            opt_expr.as_ref().is_some_and(|e| has_ambiguous_literal_in_expr(cx, e))
+        },
+
+        _ => false,
+    }
+}
diff --git a/src/tools/clippy/clippy_utils/src/lib.rs b/src/tools/clippy/clippy_utils/src/lib.rs
index c01f0ffaac9..ff1ee663f9b 100644
--- a/src/tools/clippy/clippy_utils/src/lib.rs
+++ b/src/tools/clippy/clippy_utils/src/lib.rs
@@ -77,7 +77,8 @@ pub mod visitors;
 pub use self::attrs::*;
 pub use self::check_proc_macro::{is_from_proc_macro, is_span_if, is_span_match};
 pub use self::hir_utils::{
-    HirEqInterExpr, SpanlessEq, SpanlessHash, both, count_eq, eq_expr_value, hash_expr, hash_stmt, is_bool, over,
+    HirEqInterExpr, SpanlessEq, SpanlessHash, both, count_eq, eq_expr_value, has_ambiguous_literal_in_expr, hash_expr,
+    hash_stmt, is_bool, over,
 };
 
 use core::mem;
@@ -88,6 +89,7 @@ use std::sync::{Mutex, MutexGuard, OnceLock};
 
 use itertools::Itertools;
 use rustc_abi::Integer;
+use rustc_ast::join_path_syms;
 use rustc_ast::ast::{self, LitKind, RangeLimits};
 use rustc_attr_data_structures::{AttributeKind, find_attr};
 use rustc_data_structures::fx::FxHashMap;
@@ -106,7 +108,7 @@ use rustc_hir::{
     Param, Pat, PatExpr, PatExprKind, PatKind, Path, PathSegment, QPath, Stmt, StmtKind, TraitFn, TraitItem,
     TraitItemKind, TraitRef, TyKind, UnOp, def,
 };
-use rustc_lexer::{TokenKind, tokenize};
+use rustc_lexer::{FrontmatterAllowed, TokenKind, tokenize};
 use rustc_lint::{LateContext, Level, Lint, LintContext};
 use rustc_middle::hir::nested_filter;
 use rustc_middle::hir::place::PlaceBase;
@@ -1784,9 +1786,9 @@ pub fn in_automatically_derived(tcx: TyCtxt<'_>, id: HirId) -> bool {
     tcx.hir_parent_owner_iter(id)
         .filter(|(_, node)| matches!(node, OwnerNode::Item(item) if matches!(item.kind, ItemKind::Impl(_))))
         .any(|(id, _)| {
-            has_attr(
+            find_attr!(
                 tcx.hir_attrs(tcx.local_def_id_to_hir_id(id.def_id)),
-                sym::automatically_derived,
+                AttributeKind::AutomaticallyDerived(..)
             )
         })
 }
@@ -2764,7 +2766,7 @@ pub fn expr_use_ctxt<'tcx>(cx: &LateContext<'tcx>, e: &Expr<'tcx>) -> ExprUseCtx
 /// Tokenizes the input while keeping the text associated with each token.
 pub fn tokenize_with_text(s: &str) -> impl Iterator<Item = (TokenKind, &str, InnerSpan)> {
     let mut pos = 0;
-    tokenize(s).map(move |t| {
+    tokenize(s, FrontmatterAllowed::No).map(move |t| {
         let end = pos + t.len;
         let range = pos as usize..end as usize;
         let inner = InnerSpan::new(range.start, range.end);
@@ -2779,7 +2781,7 @@ pub fn span_contains_comment(sm: &SourceMap, span: Span) -> bool {
     let Ok(snippet) = sm.span_to_snippet(span) else {
         return false;
     };
-    return tokenize(&snippet).any(|token| {
+    return tokenize(&snippet, FrontmatterAllowed::No).any(|token| {
         matches!(
             token.kind,
             TokenKind::BlockComment { .. } | TokenKind::LineComment { .. }
@@ -3244,8 +3246,8 @@ fn maybe_get_relative_path(from: &DefPath, to: &DefPath, max_super: usize) -> St
                 // a::b::c  ::d::sym refers to
                 // e::f::sym:: ::
                 // result should be super::super::super::super::e::f
-                if let DefPathData::TypeNs(s) = l {
-                    path.push(s.to_string());
+                if let DefPathData::TypeNs(sym) = l {
+                    path.push(sym);
                 }
                 if let DefPathData::TypeNs(_) = r {
                     go_up_by += 1;
@@ -3255,7 +3257,7 @@ fn maybe_get_relative_path(from: &DefPath, to: &DefPath, max_super: usize) -> St
             // a::b::sym:: ::    refers to
             // c::d::e  ::f::sym
             // when looking at `f`
-            Left(DefPathData::TypeNs(sym)) => path.push(sym.to_string()),
+            Left(DefPathData::TypeNs(sym)) => path.push(sym),
             // consider:
             // a::b::c  ::d::sym refers to
             // e::f::sym:: ::
@@ -3267,17 +3269,17 @@ fn maybe_get_relative_path(from: &DefPath, to: &DefPath, max_super: usize) -> St
 
     if go_up_by > max_super {
         // `super` chain would be too long, just use the absolute path instead
-        once(String::from("crate"))
-            .chain(to.data.iter().filter_map(|el| {
+        join_path_syms(
+            once(kw::Crate).chain(to.data.iter().filter_map(|el| {
                 if let DefPathData::TypeNs(sym) = el.data {
-                    Some(sym.to_string())
+                    Some(sym)
                 } else {
                     None
                 }
             }))
-            .join("::")
+        )
     } else {
-        repeat_n(String::from("super"), go_up_by).chain(path).join("::")
+        join_path_syms(repeat_n(kw::Super, go_up_by).chain(path))
     }
 }
 
@@ -3497,3 +3499,64 @@ pub fn is_expr_default<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) ->
         false
     }
 }
+
+/// Checks if `expr` may be directly used as the return value of its enclosing body.
+/// The following cases are covered:
+/// - `expr` as the last expression of the body, or of a block that can be used as the return value
+/// - `return expr`
+/// - then or else part of a `if` in return position
+/// - arm body of a `match` in a return position
+/// - `break expr` or `break 'label expr` if the loop or block being exited is used as a return
+///   value
+///
+/// Contrary to [`TyCtxt::hir_get_fn_id_for_return_block()`], if `expr` is part of a
+/// larger expression, for example a field expression of a `struct`, it will not be
+/// considered as matching the condition and will return `false`.
+///
+/// Also, even if `expr` is assigned to a variable which is later returned, this function
+/// will still return `false` because `expr` is not used *directly* as the return value
+/// as it goes through the intermediate variable.
+pub fn potential_return_of_enclosing_body(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
+    let enclosing_body_owner = cx
+        .tcx
+        .local_def_id_to_hir_id(cx.tcx.hir_enclosing_body_owner(expr.hir_id));
+    let mut prev_id = expr.hir_id;
+    let mut skip_until_id = None;
+    for (hir_id, node) in cx.tcx.hir_parent_iter(expr.hir_id) {
+        if hir_id == enclosing_body_owner {
+            return true;
+        }
+        if let Some(id) = skip_until_id {
+            prev_id = hir_id;
+            if id == hir_id {
+                skip_until_id = None;
+            }
+            continue;
+        }
+        match node {
+            Node::Block(Block { expr, .. }) if expr.is_some_and(|expr| expr.hir_id == prev_id) => {},
+            Node::Arm(arm) if arm.body.hir_id == prev_id => {},
+            Node::Expr(expr) => match expr.kind {
+                ExprKind::Ret(_) => return true,
+                ExprKind::If(_, then, opt_else)
+                    if then.hir_id == prev_id || opt_else.is_some_and(|els| els.hir_id == prev_id) => {},
+                ExprKind::Match(_, arms, _) if arms.iter().any(|arm| arm.hir_id == prev_id) => {},
+                ExprKind::Block(block, _) if block.hir_id == prev_id => {},
+                ExprKind::Break(
+                    Destination {
+                        target_id: Ok(target_id),
+                        ..
+                    },
+                    _,
+                ) => skip_until_id = Some(target_id),
+                _ => break,
+            },
+            _ => break,
+        }
+        prev_id = hir_id;
+    }
+
+    // `expr` is used as part of "something" and is not returned directly from its
+    // enclosing body.
+    false
+}
diff --git a/src/tools/clippy/clippy_utils/src/msrvs.rs b/src/tools/clippy/clippy_utils/src/msrvs.rs
index 7a0bef1a9bb..24ed4c3a8be 100644
--- a/src/tools/clippy/clippy_utils/src/msrvs.rs
+++ b/src/tools/clippy/clippy_utils/src/msrvs.rs
@@ -74,7 +74,7 @@ msrv_aliases! {
     1,28,0 { FROM_BOOL, REPEAT_WITH, SLICE_FROM_REF }
     1,27,0 { ITERATOR_TRY_FOLD }
     1,26,0 { RANGE_INCLUSIVE, STRING_RETAIN }
-    1,24,0 { IS_ASCII_DIGIT }
+    1,24,0 { IS_ASCII_DIGIT, PTR_NULL }
     1,18,0 { HASH_MAP_RETAIN, HASH_SET_RETAIN }
     1,17,0 { FIELD_INIT_SHORTHAND, STATIC_IN_CONST, EXPECT_ERR }
     1,16,0 { STR_REPEAT }
diff --git a/src/tools/clippy/clippy_utils/src/paths.rs b/src/tools/clippy/clippy_utils/src/paths.rs
index 8bbcb220210..c681806517a 100644
--- a/src/tools/clippy/clippy_utils/src/paths.rs
+++ b/src/tools/clippy/clippy_utils/src/paths.rs
@@ -10,7 +10,7 @@ use rustc_data_structures::fx::FxHashMap;
 use rustc_hir::def::Namespace::{MacroNS, TypeNS, ValueNS};
 use rustc_hir::def::{DefKind, Namespace, Res};
 use rustc_hir::def_id::{DefId, LOCAL_CRATE, LocalDefId};
-use rustc_hir::{ImplItemRef, ItemKind, Node, OwnerId, TraitItemRef, UseKind};
+use rustc_hir::{ItemKind, Node, UseKind};
 use rustc_lint::LateContext;
 use rustc_middle::ty::fast_reject::SimplifiedType;
 use rustc_middle::ty::{FloatTy, IntTy, Ty, TyCtxt, UintTy};
@@ -284,14 +284,6 @@ fn local_item_child_by_name(tcx: TyCtxt<'_>, local_id: LocalDefId, ns: PathNS, n
         _ => return None,
     };
 
-    let res = |ident: Ident, owner_id: OwnerId| {
-        if ident.name == name && ns.matches(tcx.def_kind(owner_id).ns()) {
-            Some(owner_id.to_def_id())
-        } else {
-            None
-        }
-    };
-
     match item_kind {
         ItemKind::Mod(_, r#mod) => r#mod.item_ids.iter().find_map(|&item_id| {
             let item = tcx.hir_item(item_id);
@@ -307,17 +299,19 @@ fn local_item_child_by_name(tcx: TyCtxt<'_>, local_id: LocalDefId, ns: PathNS, n
                 } else {
                     None
                 }
+            } else if let Some(ident) = item.kind.ident()
+                && ident.name == name
+                && ns.matches(tcx.def_kind(item.owner_id).ns())
+            {
+                Some(item.owner_id.to_def_id())
             } else {
-                res(item.kind.ident()?, item_id.owner_id)
+                None
             }
         }),
-        ItemKind::Impl(r#impl) => r#impl
-            .items
-            .iter()
-            .find_map(|&ImplItemRef { ident, id, .. }| res(ident, id.owner_id)),
-        ItemKind::Trait(.., trait_item_refs) => trait_item_refs
-            .iter()
-            .find_map(|&TraitItemRef { ident, id, .. }| res(ident, id.owner_id)),
+        ItemKind::Impl(..) | ItemKind::Trait(..)
+            => tcx.associated_items(local_id).filter_by_name_unhygienic(name)
+                .find(|assoc_item| ns.matches(Some(assoc_item.namespace())))
+                .map(|assoc_item| assoc_item.def_id),
         _ => None,
     }
 }
diff --git a/src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs b/src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs
index 942c71ac33b..b3356450d38 100644
--- a/src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs
+++ b/src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs
@@ -432,7 +432,7 @@ pub fn is_stable_const_fn(cx: &LateContext<'_>, def_id: DefId, msrv: Msrv) -> bo
                     let const_stab_rust_version = match since {
                         StableSince::Version(version) => version,
                         StableSince::Current => RustcVersion::CURRENT,
-                        StableSince::Err => return false,
+                        StableSince::Err(_) => return false,
                     };
 
                     msrv.meets(cx, const_stab_rust_version)
diff --git a/src/tools/clippy/clippy_utils/src/source.rs b/src/tools/clippy/clippy_utils/src/source.rs
index 7f2bf99daff..7d21336be1c 100644
--- a/src/tools/clippy/clippy_utils/src/source.rs
+++ b/src/tools/clippy/clippy_utils/src/source.rs
@@ -7,7 +7,7 @@ use std::sync::Arc;
 use rustc_ast::{LitKind, StrStyle};
 use rustc_errors::Applicability;
 use rustc_hir::{BlockCheckMode, Expr, ExprKind, UnsafeSource};
-use rustc_lexer::{LiteralKind, TokenKind, tokenize};
+use rustc_lexer::{FrontmatterAllowed, LiteralKind, TokenKind, tokenize};
 use rustc_lint::{EarlyContext, LateContext};
 use rustc_middle::ty::TyCtxt;
 use rustc_session::Session;
@@ -277,7 +277,7 @@ fn map_range(
 }
 
 fn ends_with_line_comment_or_broken(text: &str) -> bool {
-    let Some(last) = tokenize(text).last() else {
+    let Some(last) = tokenize(text, FrontmatterAllowed::No).last() else {
         return false;
     };
     match last.kind {
@@ -310,7 +310,8 @@ fn with_leading_whitespace_inner(lines: &[RelativeBytePos], src: &str, range: Ra
         && ends_with_line_comment_or_broken(&start[prev_start..])
         && let next_line = lines.partition_point(|&pos| pos.to_usize() < range.end)
         && let next_start = lines.get(next_line).map_or(src.len(), |&x| x.to_usize())
-        && tokenize(src.get(range.end..next_start)?).any(|t| !matches!(t.kind, TokenKind::Whitespace))
+        && tokenize(src.get(range.end..next_start)?, FrontmatterAllowed::No)
+            .any(|t| !matches!(t.kind, TokenKind::Whitespace))
     {
         Some(range.start)
     } else {
diff --git a/src/tools/clippy/clippy_utils/src/ty/mod.rs b/src/tools/clippy/clippy_utils/src/ty/mod.rs
index bffbcf073ab..fe208c032f4 100644
--- a/src/tools/clippy/clippy_utils/src/ty/mod.rs
+++ b/src/tools/clippy/clippy_utils/src/ty/mod.rs
@@ -889,7 +889,7 @@ impl AdtVariantInfo {
                     .enumerate()
                     .map(|(i, f)| (i, approx_ty_size(cx, f.ty(cx.tcx, subst))))
                     .collect::<Vec<_>>();
-                fields_size.sort_by(|(_, a_size), (_, b_size)| (a_size.cmp(b_size)));
+                fields_size.sort_by(|(_, a_size), (_, b_size)| a_size.cmp(b_size));
 
                 Self {
                     ind: i,
@@ -898,7 +898,7 @@ impl AdtVariantInfo {
                 }
             })
             .collect::<Vec<_>>();
-        variants_size.sort_by(|a, b| (b.size.cmp(&a.size)));
+        variants_size.sort_by(|a, b| b.size.cmp(&a.size));
         variants_size
     }
 }
diff --git a/src/tools/clippy/clippy_utils/src/visitors.rs b/src/tools/clippy/clippy_utils/src/visitors.rs
index fc6e30a9804..ba5cbc73836 100644
--- a/src/tools/clippy/clippy_utils/src/visitors.rs
+++ b/src/tools/clippy/clippy_utils/src/visitors.rs
@@ -1,3 +1,5 @@
+use crate::msrvs::Msrv;
+use crate::qualify_min_const_fn::is_stable_const_fn;
 use crate::ty::needs_ordered_drop;
 use crate::{get_enclosing_block, path_to_local_id};
 use core::ops::ControlFlow;
@@ -343,17 +345,17 @@ pub fn is_const_evaluatable<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) ->
                     .cx
                     .qpath_res(p, hir_id)
                     .opt_def_id()
-                    .is_some_and(|id| self.cx.tcx.is_const_fn(id)) => {},
+                    .is_some_and(|id| is_stable_const_fn(self.cx, id, Msrv::default())) => {},
                 ExprKind::MethodCall(..)
                     if self
                         .cx
                         .typeck_results()
                         .type_dependent_def_id(e.hir_id)
-                        .is_some_and(|id| self.cx.tcx.is_const_fn(id)) => {},
+                        .is_some_and(|id| is_stable_const_fn(self.cx, id, Msrv::default())) => {},
                 ExprKind::Binary(_, lhs, rhs)
                     if self.cx.typeck_results().expr_ty(lhs).peel_refs().is_primitive_ty()
                         && self.cx.typeck_results().expr_ty(rhs).peel_refs().is_primitive_ty() => {},
-                ExprKind::Unary(UnOp::Deref, e) if self.cx.typeck_results().expr_ty(e).is_ref() => (),
+                ExprKind::Unary(UnOp::Deref, e) if self.cx.typeck_results().expr_ty(e).is_raw_ptr() => (),
                 ExprKind::Unary(_, e) if self.cx.typeck_results().expr_ty(e).peel_refs().is_primitive_ty() => (),
                 ExprKind::Index(base, _, _)
                     if matches!(
@@ -388,7 +390,8 @@ pub fn is_const_evaluatable<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) ->
                 | ExprKind::Repeat(..)
                 | ExprKind::Struct(..)
                 | ExprKind::Tup(_)
-                | ExprKind::Type(..) => (),
+                | ExprKind::Type(..)
+                | ExprKind::UnsafeBinderCast(..) => (),
 
                 _ => {
                     return ControlFlow::Break(());
@@ -676,10 +679,7 @@ pub fn for_each_unconsumed_temporary<'tcx, B>(
                     helper(typeck, true, else_expr, f)?;
                 }
             },
-            ExprKind::Type(e, _) => {
-                helper(typeck, consume, e, f)?;
-            },
-            ExprKind::UnsafeBinderCast(_, e, _) => {
+            ExprKind::Type(e, _) | ExprKind::UnsafeBinderCast(_, e, _) => {
                 helper(typeck, consume, e, f)?;
             },
 
diff --git a/src/tools/clippy/lintcheck/src/config.rs b/src/tools/clippy/lintcheck/src/config.rs
index 83c3d7aba02..3b2ebf0c28a 100644
--- a/src/tools/clippy/lintcheck/src/config.rs
+++ b/src/tools/clippy/lintcheck/src/config.rs
@@ -68,6 +68,9 @@ pub(crate) enum Commands {
         /// This will limit the number of warnings that will be printed for each lint
         #[clap(long)]
         truncate: bool,
+        /// Write the diff summary to a JSON file if there are any changes
+        #[clap(long, value_name = "PATH")]
+        write_summary: Option<PathBuf>,
     },
     /// Create a lintcheck crates TOML file containing the top N popular crates
     Popular {
diff --git a/src/tools/clippy/lintcheck/src/json.rs b/src/tools/clippy/lintcheck/src/json.rs
index 8ea0a41ed36..808997ff022 100644
--- a/src/tools/clippy/lintcheck/src/json.rs
+++ b/src/tools/clippy/lintcheck/src/json.rs
@@ -4,8 +4,8 @@
 //! loading warnings from JSON files, and generating human-readable diffs
 //! between different linting runs.
 
-use std::fs;
-use std::path::Path;
+use std::path::{Path, PathBuf};
+use std::{fmt, fs};
 
 use itertools::{EitherOrBoth, Itertools};
 use serde::{Deserialize, Serialize};
@@ -17,7 +17,6 @@ const DEFAULT_LIMIT_PER_LINT: usize = 300;
 /// Target for total warnings to display across all lints when truncating output.
 const TRUNCATION_TOTAL_TARGET: usize = 1000;
 
-/// Representation of a single Clippy warning for JSON serialization.
 #[derive(Debug, Deserialize, Serialize)]
 struct LintJson {
     /// The lint name e.g. `clippy::bytes_nth`
@@ -29,7 +28,6 @@ struct LintJson {
 }
 
 impl LintJson {
-    /// Returns a tuple of name and `file_line` for sorting and comparison.
     fn key(&self) -> impl Ord + '_ {
         (self.name.as_str(), self.file_line.as_str())
     }
@@ -40,6 +38,57 @@ impl LintJson {
     }
 }
 
+#[derive(Debug, Serialize)]
+struct SummaryRow {
+    name: String,
+    added: usize,
+    removed: usize,
+    changed: usize,
+}
+
+#[derive(Debug, Serialize)]
+struct Summary(Vec<SummaryRow>);
+
+impl fmt::Display for Summary {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str(
+            "\
+| Lint | Added | Removed | Changed |
+| ---- | ----: | ------: | ------: |
+",
+        )?;
+
+        for SummaryRow {
+            name,
+            added,
+            changed,
+            removed,
+        } in &self.0
+        {
+            let html_id = to_html_id(name);
+            writeln!(f, "| [`{name}`](#{html_id}) | {added} | {changed} | {removed} |")?;
+        }
+
+        Ok(())
+    }
+}
+
+impl Summary {
+    fn new(lints: &[LintWarnings]) -> Self {
+        Summary(
+            lints
+                .iter()
+                .map(|lint| SummaryRow {
+                    name: lint.name.clone(),
+                    added: lint.added.len(),
+                    removed: lint.removed.len(),
+                    changed: lint.changed.len(),
+                })
+                .collect(),
+        )
+    }
+}
+
 /// Creates the log file output for [`crate::config::OutputFormat::Json`]
 pub(crate) fn output(clippy_warnings: Vec<ClippyWarning>) -> String {
     let mut lints: Vec<LintJson> = clippy_warnings
@@ -74,7 +123,7 @@ fn load_warnings(path: &Path) -> Vec<LintJson> {
 ///
 /// Compares warnings from `old_path` and `new_path`, then displays a summary table
 /// and detailed information about added, removed, and changed warnings.
-pub(crate) fn diff(old_path: &Path, new_path: &Path, truncate: bool) {
+pub(crate) fn diff(old_path: &Path, new_path: &Path, truncate: bool, write_summary: Option<PathBuf>) {
     let old_warnings = load_warnings(old_path);
     let new_warnings = load_warnings(new_path);
 
@@ -108,13 +157,16 @@ pub(crate) fn diff(old_path: &Path, new_path: &Path, truncate: bool) {
         }
     }
 
-    print_summary_table(&lint_warnings);
-    println!();
-
     if lint_warnings.is_empty() {
         return;
     }
 
+    let summary = Summary::new(&lint_warnings);
+    if let Some(path) = write_summary {
+        let json = serde_json::to_string(&summary).unwrap();
+        fs::write(path, json).unwrap();
+    }
+
     let truncate_after = if truncate {
         // Max 15 ensures that we at least have five messages per lint
         DEFAULT_LIMIT_PER_LINT
@@ -126,6 +178,7 @@ pub(crate) fn diff(old_path: &Path, new_path: &Path, truncate: bool) {
         usize::MAX
     };
 
+    println!("{summary}");
     for lint in lint_warnings {
         print_lint_warnings(&lint, truncate_after);
     }
@@ -140,13 +193,11 @@ struct LintWarnings {
     changed: Vec<(LintJson, LintJson)>,
 }
 
-/// Prints a formatted report for a single lint type with its warnings.
 fn print_lint_warnings(lint: &LintWarnings, truncate_after: usize) {
     let name = &lint.name;
     let html_id = to_html_id(name);
 
-    // The additional anchor is added for non GH viewers that don't prefix ID's
-    println!(r#"## `{name}` <a id="user-content-{html_id}"></a>"#);
+    println!(r#"<h2 id="{html_id}"><code>{name}</code></h2>"#);
     println!();
 
     print!(
@@ -162,22 +213,6 @@ fn print_lint_warnings(lint: &LintWarnings, truncate_after: usize) {
     print_changed_diff(&lint.changed, truncate_after / 3);
 }
 
-/// Prints a summary table of all lints with counts of added, removed, and changed warnings.
-fn print_summary_table(lints: &[LintWarnings]) {
-    println!("| Lint                                       | Added   | Removed | Changed |");
-    println!("| ------------------------------------------ | ------: | ------: | ------: |");
-
-    for lint in lints {
-        println!(
-            "| {:<62} | {:>7} | {:>7} | {:>7} |",
-            format!("[`{}`](#user-content-{})", lint.name, to_html_id(&lint.name)),
-            lint.added.len(),
-            lint.removed.len(),
-            lint.changed.len()
-        );
-    }
-}
-
 /// Prints a section of warnings with a header and formatted code blocks.
 fn print_warnings(title: &str, warnings: &[LintJson], truncate_after: usize) {
     if warnings.is_empty() {
@@ -248,17 +283,16 @@ fn truncate<T>(list: &[T], truncate_after: usize) -> &[T] {
     }
 }
 
-/// Prints a level 3 heading with an appropriate HTML ID for linking.
 fn print_h3(lint: &str, title: &str) {
     let html_id = to_html_id(lint);
-    // We have to use HTML here to be able to manually add an id.
-    println!(r#"### {title} <a id="user-content-{html_id}-{title}"></a>"#);
+    // We have to use HTML here to be able to manually add an id, GitHub doesn't add them automatically
+    println!(r#"<h3 id="{html_id}-{title}">{title}</h3>"#);
 }
 
-/// GitHub's markdown parsers doesn't like IDs with `::` and `_`. This simplifies
-/// the lint name for the HTML ID.
+/// Creates a custom ID allowed by GitHub, they must start with `user-content-` and cannot contain
+/// `::`/`_`
 fn to_html_id(lint_name: &str) -> String {
-    lint_name.replace("clippy::", "").replace('_', "-")
+    lint_name.replace("clippy::", "user-content-").replace('_', "-")
 }
 
 /// This generates the `x added` string for the start of the job summery.
@@ -270,9 +304,6 @@ fn count_string(lint: &str, label: &str, count: usize) -> String {
         format!("0 {label}")
     } else {
         let html_id = to_html_id(lint);
-        // GitHub's job summaries don't add HTML ids to headings. That's why we
-        // manually have to add them. GitHub prefixes these manual ids with
-        // `user-content-` and that's how we end up with these awesome links :D
-        format!("[{count} {label}](#user-content-{html_id}-{label})")
+        format!("[{count} {label}](#{html_id}-{label})")
     }
 }
diff --git a/src/tools/clippy/lintcheck/src/main.rs b/src/tools/clippy/lintcheck/src/main.rs
index eb390eecbcc..3a60cfa79f4 100644
--- a/src/tools/clippy/lintcheck/src/main.rs
+++ b/src/tools/clippy/lintcheck/src/main.rs
@@ -303,7 +303,12 @@ fn main() {
     let config = LintcheckConfig::new();
 
     match config.subcommand {
-        Some(Commands::Diff { old, new, truncate }) => json::diff(&old, &new, truncate),
+        Some(Commands::Diff {
+            old,
+            new,
+            truncate,
+            write_summary,
+        }) => json::diff(&old, &new, truncate, write_summary),
         Some(Commands::Popular { output, number }) => popular_crates::fetch(output, number).unwrap(),
         None => lintcheck(config),
     }
diff --git a/src/tools/clippy/rust-toolchain.toml b/src/tools/clippy/rust-toolchain.toml
index 124756a3600..f46e079db3f 100644
--- a/src/tools/clippy/rust-toolchain.toml
+++ b/src/tools/clippy/rust-toolchain.toml
@@ -1,6 +1,6 @@
 [toolchain]
 # begin autogenerated nightly
-channel = "nightly-2025-06-26"
+channel = "nightly-2025-07-10"
 # end autogenerated nightly
 components = ["cargo", "llvm-tools", "rust-src", "rust-std", "rustc", "rustc-dev", "rustfmt"]
 profile = "minimal"
diff --git a/src/tools/clippy/tests/compile-test.rs b/src/tools/clippy/tests/compile-test.rs
index cefe654fef6..83f91ccaa7b 100644
--- a/src/tools/clippy/tests/compile-test.rs
+++ b/src/tools/clippy/tests/compile-test.rs
@@ -16,8 +16,10 @@ use test_utils::IS_RUSTC_TEST_SUITE;
 use ui_test::custom_flags::Flag;
 use ui_test::custom_flags::edition::Edition;
 use ui_test::custom_flags::rustfix::RustfixMode;
+use ui_test::dependencies::DependencyBuilder;
 use ui_test::spanned::Spanned;
-use ui_test::{Args, CommandBuilder, Config, Match, error_on_output_conflict, status_emitter};
+use ui_test::status_emitter::StatusEmitter;
+use ui_test::{Args, CommandBuilder, Config, Match, error_on_output_conflict};
 
 use std::collections::{BTreeMap, HashMap};
 use std::env::{self, set_var, var_os};
@@ -27,46 +29,26 @@ use std::path::{Path, PathBuf};
 use std::sync::mpsc::{Sender, channel};
 use std::{fs, iter, thread};
 
-// Test dependencies may need an `extern crate` here to ensure that they show up
-// in the depinfo file (otherwise cargo thinks they are unused)
-extern crate futures;
-extern crate if_chain;
-extern crate itertools;
-extern crate parking_lot;
-extern crate quote;
-extern crate syn;
-extern crate tokio;
-
 mod test_utils;
 
-/// All crates used in UI tests are listed here
-static TEST_DEPENDENCIES: &[&str] = &[
-    "clippy_config",
-    "clippy_lints",
-    "clippy_utils",
-    "futures",
-    "if_chain",
-    "itertools",
-    "parking_lot",
-    "quote",
-    "regex",
-    "serde_derive",
-    "serde",
-    "syn",
-    "tokio",
-];
-
-/// Produces a string with an `--extern` flag for all UI test crate
-/// dependencies.
+/// All crates used in internal UI tests are listed here.
+/// We directly re-use these crates from their normal clippy builds, so we don't have them
+/// in `clippy_test_devs`. That saves a lot of time but also means they don't work in a stage 1
+/// test in rustc bootstrap.
+static INTERNAL_TEST_DEPENDENCIES: &[&str] = &["clippy_config", "clippy_lints", "clippy_utils"];
+
+/// Produces a string with an `--extern` flag for all `INTERNAL_TEST_DEPENDENCIES`.
 ///
 /// The dependency files are located by parsing the depinfo file for this test
 /// module. This assumes the `-Z binary-dep-depinfo` flag is enabled. All test
 /// dependencies must be added to Cargo.toml at the project root. Test
 /// dependencies that are not *directly* used by this test module require an
 /// `extern crate` declaration.
-fn extern_flags() -> Vec<String> {
+fn internal_extern_flags() -> Vec<String> {
+    let current_exe_path = env::current_exe().unwrap();
+    let deps_path = current_exe_path.parent().unwrap();
     let current_exe_depinfo = {
-        let mut path = env::current_exe().unwrap();
+        let mut path = current_exe_path.clone();
         path.set_extension("d");
         fs::read_to_string(path).unwrap()
     };
@@ -88,7 +70,7 @@ fn extern_flags() -> Vec<String> {
             Some((name, path_str))
         };
         if let Some((name, path)) = parse_name_path()
-            && TEST_DEPENDENCIES.contains(&name)
+            && INTERNAL_TEST_DEPENDENCIES.contains(&name)
         {
             // A dependency may be listed twice if it is available in sysroot,
             // and the sysroot dependencies are listed first. As of the writing,
@@ -96,7 +78,7 @@ fn extern_flags() -> Vec<String> {
             crates.insert(name, path);
         }
     }
-    let not_found: Vec<&str> = TEST_DEPENDENCIES
+    let not_found: Vec<&str> = INTERNAL_TEST_DEPENDENCIES
         .iter()
         .copied()
         .filter(|n| !crates.contains_key(n))
@@ -111,6 +93,7 @@ fn extern_flags() -> Vec<String> {
     crates
         .into_iter()
         .map(|(name, path)| format!("--extern={name}={path}"))
+        .chain([format!("-Ldependency={}", deps_path.display())])
         .collect()
 }
 
@@ -119,7 +102,6 @@ const RUN_INTERNAL_TESTS: bool = cfg!(feature = "internal");
 
 struct TestContext {
     args: Args,
-    extern_flags: Vec<String>,
     diagnostic_collector: Option<DiagnosticCollector>,
     collector_thread: Option<thread::JoinHandle<()>>,
 }
@@ -134,7 +116,6 @@ impl TestContext {
             .unzip();
         Self {
             args,
-            extern_flags: extern_flags(),
             diagnostic_collector,
             collector_thread,
         }
@@ -144,8 +125,17 @@ impl TestContext {
         let target_dir = PathBuf::from(var_os("CARGO_TARGET_DIR").unwrap_or_else(|| "target".into()));
         let mut config = Config {
             output_conflict_handling: error_on_output_conflict,
+            // Pre-fill filters with TESTNAME; will be later extended with `self.args`.
             filter_files: env::var("TESTNAME")
-                .map(|filters| filters.split(',').map(str::to_string).collect())
+                .map(|filters| {
+                    filters
+                        .split(',')
+                        // Make sure that if TESTNAME is empty we produce the empty list here,
+                        // not a list containing an empty string.
+                        .filter(|s| !s.is_empty())
+                        .map(str::to_string)
+                        .collect()
+                })
                 .unwrap_or_default(),
             target: None,
             bless_command: Some(if IS_RUSTC_TEST_SUITE {
@@ -158,6 +148,39 @@ impl TestContext {
         };
         let defaults = config.comment_defaults.base();
         defaults.set_custom("edition", Edition("2024".into()));
+        defaults.set_custom(
+            "dependencies",
+            DependencyBuilder {
+                program: {
+                    let mut p = CommandBuilder::cargo();
+                    // If we run in bootstrap, we need to use the right compiler for building the
+                    // tests -- not the compiler that built clippy, but the compiler that got linked
+                    // into clippy. Just invoking TEST_RUSTC does not work because LD_LIBRARY_PATH
+                    // is set in a way that makes it pick the wrong sysroot. Sadly due to
+                    // <https://github.com/rust-lang/cargo/issues/4423> we cannot use RUSTFLAGS to
+                    // set `--sysroot`, so we need to use bootstrap's rustc wrapper. That wrapper
+                    // however has some staging logic that is hurting us here, so to work around
+                    // that we set both the "real" and "staging" rustc to TEST_RUSTC, including the
+                    // associated library paths.
+                    if let Some(rustc) = option_env!("TEST_RUSTC") {
+                        let libdir = option_env!("TEST_RUSTC_LIB").unwrap();
+                        let sysroot = option_env!("TEST_SYSROOT").unwrap();
+                        p.envs.push(("RUSTC_REAL".into(), Some(rustc.into())));
+                        p.envs.push(("RUSTC_REAL_LIBDIR".into(), Some(libdir.into())));
+                        p.envs.push(("RUSTC_SNAPSHOT".into(), Some(rustc.into())));
+                        p.envs.push(("RUSTC_SNAPSHOT_LIBDIR".into(), Some(libdir.into())));
+                        p.envs.push((
+                            "RUSTC_SYSROOT".into(),
+                            Some(sysroot.into()),
+                        ));
+                    }
+                    p
+                },
+                crate_manifest_path: Path::new("clippy_test_deps").join("Cargo.toml"),
+                build_std: None,
+                bless_lockfile: self.args.bless,
+            },
+        );
         defaults.exit_status = None.into();
         if mandatory_annotations {
             defaults.require_annotations = Some(Spanned::dummy(true)).into();
@@ -182,12 +205,10 @@ impl TestContext {
                 "-Zui-testing",
                 "-Zdeduplicate-diagnostics=no",
                 "-Dwarnings",
-                &format!("-Ldependency={}", deps_path.display()),
             ]
             .map(OsString::from),
         );
 
-        config.program.args.extend(self.extern_flags.iter().map(OsString::from));
         // Prevent rustc from creating `rustc-ice-*` files the console output is enough.
         config.program.envs.push(("RUSTC_ICE".into(), Some("0".into())));
 
@@ -195,6 +216,9 @@ impl TestContext {
             let dep = format!("-Ldependency={}", Path::new(host_libs).join("deps").display());
             config.program.args.push(dep.into());
         }
+        if let Some(sysroot) = option_env!("TEST_SYSROOT") {
+            config.program.args.push(format!("--sysroot={sysroot}").into());
+        }
 
         config.program.program = profile_path.join(if cfg!(windows) {
             "clippy-driver.exe"
@@ -217,7 +241,7 @@ fn run_ui(cx: &TestContext) {
         vec![config],
         ui_test::default_file_filter,
         ui_test::default_per_file_config,
-        status_emitter::Text::from(cx.args.format),
+        Box::<dyn StatusEmitter>::from(cx.args.format),
     )
     .unwrap();
 }
@@ -227,13 +251,17 @@ fn run_internal_tests(cx: &TestContext) {
         return;
     }
     let mut config = cx.base_config("ui-internal", true);
+    config
+        .program
+        .args
+        .extend(internal_extern_flags().iter().map(OsString::from));
     config.bless_command = Some("cargo uitest --features internal -- -- --bless".into());
 
     ui_test::run_tests_generic(
         vec![config],
         ui_test::default_file_filter,
         ui_test::default_per_file_config,
-        status_emitter::Text::from(cx.args.format),
+        Box::<dyn StatusEmitter>::from(cx.args.format),
     )
     .unwrap();
 }
@@ -257,7 +285,7 @@ fn run_ui_toml(cx: &TestContext) {
                 .envs
                 .push(("CLIPPY_CONF_DIR".into(), Some(path.parent().unwrap().into())));
         },
-        status_emitter::Text::from(cx.args.format),
+        Box::<dyn StatusEmitter>::from(cx.args.format),
     )
     .unwrap();
 }
@@ -304,7 +332,7 @@ fn run_ui_cargo(cx: &TestContext) {
                 .then(|| ui_test::default_any_file_filter(path, config) && !ignored_32bit(path))
         },
         |_config, _file_contents| {},
-        status_emitter::Text::from(cx.args.format),
+        Box::<dyn StatusEmitter>::from(cx.args.format),
     )
     .unwrap();
 }
diff --git a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.default.stderr b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.default.stderr
index a3c35a31c33..87e4b0c5c7d 100644
--- a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.default.stderr
+++ b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.default.stderr
@@ -136,13 +136,13 @@ error: incorrect ordering of trait items (defined order: [Const, Type, Fn])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:155:5
    |
 LL |     const A: bool;
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
    |
 note: should be placed before `SomeType`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:153:5
    |
 LL |     type SomeType;
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: incorrect ordering of items (must be alphabetically ordered)
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:171:11
@@ -172,13 +172,13 @@ error: incorrect ordering of impl items (defined order: [Const, Type, Fn])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:189:5
    |
 LL |     const A: bool = false;
-   |     ^^^^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
    |
 note: should be placed before `SomeType`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:187:5
    |
 LL |     type SomeType = ();
-   |     ^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: aborting due to 15 previous errors
 
diff --git a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.default_exp.stderr b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.default_exp.stderr
index a3c35a31c33..87e4b0c5c7d 100644
--- a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.default_exp.stderr
+++ b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.default_exp.stderr
@@ -136,13 +136,13 @@ error: incorrect ordering of trait items (defined order: [Const, Type, Fn])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:155:5
    |
 LL |     const A: bool;
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
    |
 note: should be placed before `SomeType`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:153:5
    |
 LL |     type SomeType;
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: incorrect ordering of items (must be alphabetically ordered)
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:171:11
@@ -172,13 +172,13 @@ error: incorrect ordering of impl items (defined order: [Const, Type, Fn])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:189:5
    |
 LL |     const A: bool = false;
-   |     ^^^^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
    |
 note: should be placed before `SomeType`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:187:5
    |
 LL |     type SomeType = ();
-   |     ^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: aborting due to 15 previous errors
 
diff --git a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.ord_within.stderr b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.ord_within.stderr
index 3fdd706fc62..40505e2a1c4 100644
--- a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.ord_within.stderr
+++ b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.ord_within.stderr
@@ -211,13 +211,13 @@ error: incorrect ordering of trait items (defined order: [Const, Type, Fn])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:155:5
    |
 LL |     const A: bool;
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
    |
 note: should be placed before `SomeType`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:153:5
    |
 LL |     type SomeType;
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: incorrect ordering of items (must be alphabetically ordered)
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:171:11
@@ -247,13 +247,13 @@ error: incorrect ordering of impl items (defined order: [Const, Type, Fn])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:189:5
    |
 LL |     const A: bool = false;
-   |     ^^^^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
    |
 note: should be placed before `SomeType`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:187:5
    |
 LL |     type SomeType = ();
-   |     ^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: incorrect ordering of items (must be alphabetically ordered)
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed.rs:207:11
diff --git a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.var_1.stderr b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.var_1.stderr
index 730f12c38a0..d8db2243d41 100644
--- a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.var_1.stderr
+++ b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.var_1.stderr
@@ -28,25 +28,25 @@ error: incorrect ordering of impl items (defined order: [Fn, Type, Const])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.rs:119:5
    |
 LL |     type SomeType = ();
-   |     ^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
    |
 note: should be placed before `A`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.rs:117:5
    |
 LL |     const A: bool = false;
-   |     ^^^^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: incorrect ordering of impl items (defined order: [Fn, Type, Const])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.rs:122:5
    |
 LL |     fn a() {}
-   |     ^^^^^^^^^
+   |     ^^^^^^
    |
 note: should be placed before `SomeType`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.rs:119:5
    |
 LL |     type SomeType = ();
-   |     ^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: incorrect ordering of items (must be alphabetically ordered)
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.rs:149:8
@@ -76,13 +76,13 @@ error: incorrect ordering of trait items (defined order: [Fn, Type, Const])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.rs:163:5
    |
 LL |     type SomeType;
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
    |
 note: should be placed before `A`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.rs:161:5
    |
 LL |     const A: bool;
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: incorrect ordering of trait items (defined order: [Fn, Type, Const])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.rs:166:5
@@ -94,7 +94,7 @@ note: should be placed before `SomeType`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_mixed_var_1.rs:163:5
    |
 LL |     type SomeType;
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: aborting due to 8 previous errors
 
diff --git a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_only_impl.only_impl.stderr b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_only_impl.only_impl.stderr
index 77596ba2394..7f6bddf8005 100644
--- a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_only_impl.only_impl.stderr
+++ b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_only_impl.only_impl.stderr
@@ -16,25 +16,25 @@ error: incorrect ordering of impl items (defined order: [Const, Type, Fn])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_only_impl.rs:46:5
    |
 LL |     type SomeType = i8;
-   |     ^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
    |
 note: should be placed before `a`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_only_impl.rs:43:5
    |
 LL |     fn a() {}
-   |     ^^^^^^^^^
+   |     ^^^^^^
 
 error: incorrect ordering of impl items (defined order: [Const, Type, Fn])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_only_impl.rs:49:5
    |
 LL |     const A: bool = true;
-   |     ^^^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
    |
 note: should be placed before `SomeType`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_only_impl.rs:46:5
    |
 LL |     type SomeType = i8;
-   |     ^^^^^^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: aborting due to 3 previous errors
 
diff --git a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_only_trait.only_trait.stderr b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_only_trait.only_trait.stderr
index 3d903330be8..a7cff238b78 100644
--- a/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_only_trait.only_trait.stderr
+++ b/src/tools/clippy/tests/ui-toml/arbitrary_source_item_ordering/ordering_only_trait.only_trait.stderr
@@ -28,13 +28,13 @@ error: incorrect ordering of trait items (defined order: [Const, Type, Fn])
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_only_trait.rs:45:5
    |
 LL |     const A: bool;
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
    |
 note: should be placed before `SomeType`
   --> tests/ui-toml/arbitrary_source_item_ordering/ordering_only_trait.rs:43:5
    |
 LL |     type SomeType;
-   |     ^^^^^^^^^^^^^^
+   |     ^^^^^^^^^^^^^
 
 error: aborting due to 3 previous errors
 
diff --git a/src/tools/clippy/tests/ui-toml/undocumented_unsafe_blocks/undocumented_unsafe_blocks.disabled.stderr b/src/tools/clippy/tests/ui-toml/undocumented_unsafe_blocks/undocumented_unsafe_blocks.disabled.stderr
index 20cdff5fcd1..cebfc48a884 100644
--- a/src/tools/clippy/tests/ui-toml/undocumented_unsafe_blocks/undocumented_unsafe_blocks.disabled.stderr
+++ b/src/tools/clippy/tests/ui-toml/undocumented_unsafe_blocks/undocumented_unsafe_blocks.disabled.stderr
@@ -450,5 +450,13 @@ help: consider removing the safety comment
 LL |     // SAFETY: unnecessary_safety_comment triggers here
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: aborting due to 52 previous errors
+error: unsafe block missing a safety comment
+  --> tests/ui-toml/undocumented_unsafe_blocks/undocumented_unsafe_blocks.rs:733:12
+   |
+LL |     return unsafe { h() };
+   |            ^^^^^^^^^^^^^^
+   |
+   = help: consider adding a safety comment on the preceding line
+
+error: aborting due to 53 previous errors
 
diff --git a/src/tools/clippy/tests/ui-toml/undocumented_unsafe_blocks/undocumented_unsafe_blocks.rs b/src/tools/clippy/tests/ui-toml/undocumented_unsafe_blocks/undocumented_unsafe_blocks.rs
index 91a02bc3d7c..a2d7c1b6c79 100644
--- a/src/tools/clippy/tests/ui-toml/undocumented_unsafe_blocks/undocumented_unsafe_blocks.rs
+++ b/src/tools/clippy/tests/ui-toml/undocumented_unsafe_blocks/undocumented_unsafe_blocks.rs
@@ -723,4 +723,15 @@ fn issue_13039() {
     _ = unsafe { foo() }
 }
 
+fn rfl_issue15034() -> i32 {
+    unsafe fn h() -> i32 {
+        1i32
+    }
+    // This shouldn't lint with accept-comment-above-attributes! Thus fixing a false positive!
+    // SAFETY: My safety comment!
+    #[allow(clippy::unnecessary_cast)]
+    return unsafe { h() };
+    //~[disabled]^ ERROR: unsafe block missing a safety comment
+}
+
 fn main() {}
diff --git a/src/tools/clippy/tests/ui/assign_ops.fixed b/src/tools/clippy/tests/ui/assign_ops.fixed
index 99beea850a2..eee61f949e7 100644
--- a/src/tools/clippy/tests/ui/assign_ops.fixed
+++ b/src/tools/clippy/tests/ui/assign_ops.fixed
@@ -84,8 +84,7 @@ mod issue14871 {
         const ONE: Self;
     }
 
-    #[const_trait]
-    pub trait NumberConstants {
+    pub const trait NumberConstants {
         fn constant(value: usize) -> Self;
     }
 
diff --git a/src/tools/clippy/tests/ui/assign_ops.rs b/src/tools/clippy/tests/ui/assign_ops.rs
index 900d5ad38e0..13ffcee0a3c 100644
--- a/src/tools/clippy/tests/ui/assign_ops.rs
+++ b/src/tools/clippy/tests/ui/assign_ops.rs
@@ -84,8 +84,7 @@ mod issue14871 {
         const ONE: Self;
     }
 
-    #[const_trait]
-    pub trait NumberConstants {
+    pub const trait NumberConstants {
         fn constant(value: usize) -> Self;
     }
 
diff --git a/src/tools/clippy/tests/ui/author/if.stdout b/src/tools/clippy/tests/ui/author/if.stdout
index da359866bff..dbff55634ea 100644
--- a/src/tools/clippy/tests/ui/author/if.stdout
+++ b/src/tools/clippy/tests/ui/author/if.stdout
@@ -1,8 +1,7 @@
 if let StmtKind::Let(local) = stmt.kind
     && let Some(init) = local.init
     && let ExprKind::If(cond, then, Some(else_expr)) = init.kind
-    && let ExprKind::DropTemps(expr) = cond.kind
-    && let ExprKind::Lit(ref lit) = expr.kind
+    && let ExprKind::Lit(ref lit) = cond.kind
     && let LitKind::Bool(true) = lit.node
     && let ExprKind::Block(block, None) = then.kind
     && block.stmts.len() == 1
diff --git a/src/tools/clippy/tests/ui/author/struct.stdout b/src/tools/clippy/tests/ui/author/struct.stdout
index 1e8fbafd30c..2dedab56dce 100644
--- a/src/tools/clippy/tests/ui/author/struct.stdout
+++ b/src/tools/clippy/tests/ui/author/struct.stdout
@@ -2,8 +2,7 @@ if let ExprKind::Struct(qpath, fields, None) = expr.kind
     && fields.len() == 1
     && fields[0].ident.as_str() == "field"
     && let ExprKind::If(cond, then, Some(else_expr)) = fields[0].expr.kind
-    && let ExprKind::DropTemps(expr1) = cond.kind
-    && let ExprKind::Lit(ref lit) = expr1.kind
+    && let ExprKind::Lit(ref lit) = cond.kind
     && let LitKind::Bool(true) = lit.node
     && let ExprKind::Block(block, None) = then.kind
     && block.stmts.is_empty()
diff --git a/src/tools/clippy/tests/ui/auxiliary/proc_macro_derive.rs b/src/tools/clippy/tests/ui/auxiliary/proc_macro_derive.rs
index 5992d15935d..54650922871 100644
--- a/src/tools/clippy/tests/ui/auxiliary/proc_macro_derive.rs
+++ b/src/tools/clippy/tests/ui/auxiliary/proc_macro_derive.rs
@@ -16,7 +16,7 @@ pub fn derive(_: TokenStream) -> TokenStream {
     let output = quote! {
         // Should not trigger `useless_attribute`
         #[allow(dead_code)]
-        extern crate rustc_middle;
+        extern crate core;
     };
     output
 }
diff --git a/src/tools/clippy/tests/ui/borrow_as_ptr.fixed b/src/tools/clippy/tests/ui/borrow_as_ptr.fixed
index 3ba2eea59f0..3f6e5245b87 100644
--- a/src/tools/clippy/tests/ui/borrow_as_ptr.fixed
+++ b/src/tools/clippy/tests/ui/borrow_as_ptr.fixed
@@ -47,3 +47,9 @@ fn implicit_cast() {
     // Do not lint references to temporaries
     core::ptr::eq(&0i32, &1i32);
 }
+
+fn issue_15141() {
+    let a = String::new();
+    // Don't lint cast to dyn trait pointers
+    let b = &a as *const dyn std::any::Any;
+}
diff --git a/src/tools/clippy/tests/ui/borrow_as_ptr.rs b/src/tools/clippy/tests/ui/borrow_as_ptr.rs
index 8cdd0512da5..20f4f40e001 100644
--- a/src/tools/clippy/tests/ui/borrow_as_ptr.rs
+++ b/src/tools/clippy/tests/ui/borrow_as_ptr.rs
@@ -47,3 +47,9 @@ fn implicit_cast() {
     // Do not lint references to temporaries
     core::ptr::eq(&0i32, &1i32);
 }
+
+fn issue_15141() {
+    let a = String::new();
+    // Don't lint cast to dyn trait pointers
+    let b = &a as *const dyn std::any::Any;
+}
diff --git a/src/tools/clippy/tests/ui/cast_alignment.rs b/src/tools/clippy/tests/ui/cast_alignment.rs
index 5773ffddb91..ef667f5598a 100644
--- a/src/tools/clippy/tests/ui/cast_alignment.rs
+++ b/src/tools/clippy/tests/ui/cast_alignment.rs
@@ -1,6 +1,5 @@
 //! Test casts for alignment issues
 
-#![feature(rustc_private)]
 #![feature(core_intrinsics)]
 #![warn(clippy::cast_ptr_alignment)]
 #![allow(
@@ -10,8 +9,6 @@
     clippy::borrow_as_ptr
 )]
 
-extern crate libc;
-
 fn main() {
     /* These should be warned against */
 
diff --git a/src/tools/clippy/tests/ui/cast_alignment.stderr b/src/tools/clippy/tests/ui/cast_alignment.stderr
index 6d9a81f0ecf..ee4c3e9a77e 100644
--- a/src/tools/clippy/tests/ui/cast_alignment.stderr
+++ b/src/tools/clippy/tests/ui/cast_alignment.stderr
@@ -1,5 +1,5 @@
 error: casting from `*const u8` to a more-strictly-aligned pointer (`*const u16`) (1 < 2 bytes)
-  --> tests/ui/cast_alignment.rs:19:5
+  --> tests/ui/cast_alignment.rs:16:5
    |
 LL |     (&1u8 as *const u8) as *const u16;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -8,19 +8,19 @@ LL |     (&1u8 as *const u8) as *const u16;
    = help: to override `-D warnings` add `#[allow(clippy::cast_ptr_alignment)]`
 
 error: casting from `*mut u8` to a more-strictly-aligned pointer (`*mut u16`) (1 < 2 bytes)
-  --> tests/ui/cast_alignment.rs:22:5
+  --> tests/ui/cast_alignment.rs:19:5
    |
 LL |     (&mut 1u8 as *mut u8) as *mut u16;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: casting from `*const u8` to a more-strictly-aligned pointer (`*const u16`) (1 < 2 bytes)
-  --> tests/ui/cast_alignment.rs:26:5
+  --> tests/ui/cast_alignment.rs:23:5
    |
 LL |     (&1u8 as *const u8).cast::<u16>();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: casting from `*mut u8` to a more-strictly-aligned pointer (`*mut u16`) (1 < 2 bytes)
-  --> tests/ui/cast_alignment.rs:29:5
+  --> tests/ui/cast_alignment.rs:26:5
    |
 LL |     (&mut 1u8 as *mut u8).cast::<u16>();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/src/tools/clippy/tests/ui/cast_size.32bit.stderr b/src/tools/clippy/tests/ui/cast_size.32bit.stderr
index cb1620e36a2..5811cb3607b 100644
--- a/src/tools/clippy/tests/ui/cast_size.32bit.stderr
+++ b/src/tools/clippy/tests/ui/cast_size.32bit.stderr
@@ -177,6 +177,14 @@ error: casting `usize` to `f64` causes a loss of precision on targets with 64-bi
 LL |     9_999_999_999_999_999usize as f64;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+error: casting `usize` to `u16` may truncate the value
+  --> tests/ui/cast_size.rs:71:20
+   |
+LL |     const N: u16 = M as u16;
+   |                    ^^^^^^^^
+   |
+   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
+
 error: literal out of range for `usize`
   --> tests/ui/cast_size.rs:63:5
    |
@@ -186,5 +194,5 @@ LL |     9_999_999_999_999_999usize as f64;
    = note: the literal `9_999_999_999_999_999usize` does not fit into the type `usize` whose range is `0..=4294967295`
    = note: `#[deny(overflowing_literals)]` on by default
 
-error: aborting due to 19 previous errors
+error: aborting due to 20 previous errors
 
diff --git a/src/tools/clippy/tests/ui/cast_size.64bit.stderr b/src/tools/clippy/tests/ui/cast_size.64bit.stderr
index b6000a52abb..ba1419583ae 100644
--- a/src/tools/clippy/tests/ui/cast_size.64bit.stderr
+++ b/src/tools/clippy/tests/ui/cast_size.64bit.stderr
@@ -177,5 +177,13 @@ error: casting `usize` to `f64` causes a loss of precision on targets with 64-bi
 LL |     9_999_999_999_999_999usize as f64;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: aborting due to 18 previous errors
+error: casting `usize` to `u16` may truncate the value
+  --> tests/ui/cast_size.rs:71:20
+   |
+LL |     const N: u16 = M as u16;
+   |                    ^^^^^^^^
+   |
+   = help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
+
+error: aborting due to 19 previous errors
 
diff --git a/src/tools/clippy/tests/ui/cast_size.rs b/src/tools/clippy/tests/ui/cast_size.rs
index e5bef2a99d5..ecc58669419 100644
--- a/src/tools/clippy/tests/ui/cast_size.rs
+++ b/src/tools/clippy/tests/ui/cast_size.rs
@@ -65,3 +65,9 @@ fn main() {
     //~[32bit]^^ ERROR: literal out of range for `usize`
     // 999_999_999_999_999_999_999_999_999_999u128 as f128;
 }
+
+fn issue15163() {
+    const M: usize = 100;
+    const N: u16 = M as u16;
+    //~^ cast_possible_truncation
+}
diff --git a/src/tools/clippy/tests/ui/coerce_container_to_any.fixed b/src/tools/clippy/tests/ui/coerce_container_to_any.fixed
index ae9d3ef9656..b5b3f15b4de 100644
--- a/src/tools/clippy/tests/ui/coerce_container_to_any.fixed
+++ b/src/tools/clippy/tests/ui/coerce_container_to_any.fixed
@@ -3,7 +3,7 @@
 use std::any::Any;
 
 fn main() {
-    let x: Box<dyn Any> = Box::new(());
+    let mut x: Box<dyn Any> = Box::new(());
     let ref_x = &x;
 
     f(&*x);
@@ -15,12 +15,23 @@ fn main() {
     let _: &dyn Any = &*x;
     //~^ coerce_container_to_any
 
+    let _: &dyn Any = &*x;
+    //~^ coerce_container_to_any
+
+    let _: &mut dyn Any = &mut *x;
+    //~^ coerce_container_to_any
+
     f(&42);
     f(&Box::new(()));
     f(&Box::new(Box::new(())));
+    let ref_x = &x;
     f(&**ref_x);
     f(&*x);
     let _: &dyn Any = &*x;
+
+    // https://github.com/rust-lang/rust-clippy/issues/15045
+    #[allow(clippy::needless_borrow)]
+    (&x).downcast_ref::<()>().unwrap();
 }
 
 fn f(_: &dyn Any) {}
diff --git a/src/tools/clippy/tests/ui/coerce_container_to_any.rs b/src/tools/clippy/tests/ui/coerce_container_to_any.rs
index 9948bd48e0d..4d6527bb552 100644
--- a/src/tools/clippy/tests/ui/coerce_container_to_any.rs
+++ b/src/tools/clippy/tests/ui/coerce_container_to_any.rs
@@ -3,7 +3,7 @@
 use std::any::Any;
 
 fn main() {
-    let x: Box<dyn Any> = Box::new(());
+    let mut x: Box<dyn Any> = Box::new(());
     let ref_x = &x;
 
     f(&x);
@@ -15,12 +15,23 @@ fn main() {
     let _: &dyn Any = &x;
     //~^ coerce_container_to_any
 
+    let _: &dyn Any = &mut x;
+    //~^ coerce_container_to_any
+
+    let _: &mut dyn Any = &mut x;
+    //~^ coerce_container_to_any
+
     f(&42);
     f(&Box::new(()));
     f(&Box::new(Box::new(())));
+    let ref_x = &x;
     f(&**ref_x);
     f(&*x);
     let _: &dyn Any = &*x;
+
+    // https://github.com/rust-lang/rust-clippy/issues/15045
+    #[allow(clippy::needless_borrow)]
+    (&x).downcast_ref::<()>().unwrap();
 }
 
 fn f(_: &dyn Any) {}
diff --git a/src/tools/clippy/tests/ui/coerce_container_to_any.stderr b/src/tools/clippy/tests/ui/coerce_container_to_any.stderr
index 00ab77e0ce0..26389c9186e 100644
--- a/src/tools/clippy/tests/ui/coerce_container_to_any.stderr
+++ b/src/tools/clippy/tests/ui/coerce_container_to_any.stderr
@@ -19,5 +19,17 @@ error: coercing `&std::boxed::Box<dyn std::any::Any>` to `&dyn Any`
 LL |     let _: &dyn Any = &x;
    |                       ^^ help: consider dereferencing: `&*x`
 
-error: aborting due to 3 previous errors
+error: coercing `&mut std::boxed::Box<dyn std::any::Any>` to `&dyn Any`
+  --> tests/ui/coerce_container_to_any.rs:18:23
+   |
+LL |     let _: &dyn Any = &mut x;
+   |                       ^^^^^^ help: consider dereferencing: `&*x`
+
+error: coercing `&mut std::boxed::Box<dyn std::any::Any>` to `&mut dyn Any`
+  --> tests/ui/coerce_container_to_any.rs:21:27
+   |
+LL |     let _: &mut dyn Any = &mut x;
+   |                           ^^^^^^ help: consider dereferencing: `&mut *x`
+
+error: aborting due to 5 previous errors
 
diff --git a/src/tools/clippy/tests/ui/disallowed_script_idents.rs b/src/tools/clippy/tests/ui/disallowed_script_idents.rs
index 08fd1d9669e..dae380045ae 100644
--- a/src/tools/clippy/tests/ui/disallowed_script_idents.rs
+++ b/src/tools/clippy/tests/ui/disallowed_script_idents.rs
@@ -15,3 +15,17 @@ fn main() {
     let カウンタ = 10;
     //~^ disallowed_script_idents
 }
+
+fn issue15116() {
+    const ÄÖÜ: u8 = 0;
+    const _ÄÖÜ: u8 = 0;
+    const Ä_ÖÜ: u8 = 0;
+    const ÄÖ_Ü: u8 = 0;
+    const ÄÖÜ_: u8 = 0;
+    let äöüß = 1;
+    let _äöüß = 1;
+    let ä_öüß = 1;
+    let äö_üß = 1;
+    let äöü_ß = 1;
+    let äöüß_ = 1;
+}
diff --git a/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.fixed b/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.fixed
index 065f4486e39..5c57c58fbc0 100644
--- a/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.fixed
+++ b/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.fixed
@@ -72,8 +72,6 @@ pub struct NotEmptyTight;
 
 /// ## Heading
 ///
-/// - [x][] - Done
-//~^ ERROR: link reference defined in list item
-/// - [ ][] - Not Done
-//~^ ERROR: link reference defined in list item
+/// - [x] - Done
+/// - [ ] - Not Done
 pub struct GithubCheckboxes;
diff --git a/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.rs b/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.rs
index c7eab50c8b3..06b6ba49e19 100644
--- a/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.rs
+++ b/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.rs
@@ -73,7 +73,5 @@ pub struct NotEmptyTight;
 /// ## Heading
 ///
 /// - [x] - Done
-//~^ ERROR: link reference defined in list item
 /// - [ ] - Not Done
-//~^ ERROR: link reference defined in list item
 pub struct GithubCheckboxes;
diff --git a/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.stderr b/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.stderr
index 5a815dabf4d..27314c7e968 100644
--- a/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.stderr
+++ b/src/tools/clippy/tests/ui/doc/doc_nested_refdef_list_item.stderr
@@ -144,29 +144,5 @@ help: for an intra-doc link, add `[]` between the label and the colon
 LL | /// - [link][]: def "title"
    |             ++
 
-error: link reference defined in list item
-  --> tests/ui/doc/doc_nested_refdef_list_item.rs:75:7
-   |
-LL | /// - [x] - Done
-   |       ^^^
-   |
-   = help: link definitions are not shown in rendered documentation
-help: for an intra-doc link, add `[]` between the label and the colon
-   |
-LL | /// - [x][] - Done
-   |          ++
-
-error: link reference defined in list item
-  --> tests/ui/doc/doc_nested_refdef_list_item.rs:77:7
-   |
-LL | /// - [ ] - Not Done
-   |       ^^^
-   |
-   = help: link definitions are not shown in rendered documentation
-help: for an intra-doc link, add `[]` between the label and the colon
-   |
-LL | /// - [ ][] - Not Done
-   |          ++
-
-error: aborting due to 14 previous errors
+error: aborting due to 12 previous errors
 
diff --git a/src/tools/clippy/tests/ui/empty_loop_intrinsic.rs b/src/tools/clippy/tests/ui/empty_loop_intrinsic.rs
new file mode 100644
index 00000000000..a550e560965
--- /dev/null
+++ b/src/tools/clippy/tests/ui/empty_loop_intrinsic.rs
@@ -0,0 +1,13 @@
+//@check-pass
+
+#![warn(clippy::empty_loop)]
+#![feature(intrinsics)]
+#![feature(rustc_attrs)]
+
+// From issue #15200
+#[rustc_intrinsic]
+#[rustc_nounwind]
+/// # Safety
+pub const unsafe fn simd_insert<T, U>(x: T, idx: u32, val: U) -> T;
+
+fn main() {}
diff --git a/src/tools/clippy/tests/ui/exit1_compile_flag_test.rs b/src/tools/clippy/tests/ui/exit1_compile_flag_test.rs
new file mode 100644
index 00000000000..9f83ed32533
--- /dev/null
+++ b/src/tools/clippy/tests/ui/exit1_compile_flag_test.rs
@@ -0,0 +1,17 @@
+//@compile-flags: --test
+#![warn(clippy::exit)]
+
+fn not_main() {
+    if true {
+        std::process::exit(4);
+        //~^ exit
+    }
+}
+
+fn main() {
+    if true {
+        std::process::exit(2);
+    };
+    not_main();
+    std::process::exit(1);
+}
diff --git a/src/tools/clippy/tests/ui/exit1_compile_flag_test.stderr b/src/tools/clippy/tests/ui/exit1_compile_flag_test.stderr
new file mode 100644
index 00000000000..6e33c39f0d7
--- /dev/null
+++ b/src/tools/clippy/tests/ui/exit1_compile_flag_test.stderr
@@ -0,0 +1,11 @@
+error: usage of `process::exit`
+  --> tests/ui/exit1_compile_flag_test.rs:6:9
+   |
+LL |         std::process::exit(4);
+   |         ^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: `-D clippy::exit` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::exit)]`
+
+error: aborting due to 1 previous error
+
diff --git a/src/tools/clippy/tests/ui/exit2_compile_flag_test.rs b/src/tools/clippy/tests/ui/exit2_compile_flag_test.rs
new file mode 100644
index 00000000000..0b994ebc56c
--- /dev/null
+++ b/src/tools/clippy/tests/ui/exit2_compile_flag_test.rs
@@ -0,0 +1,15 @@
+//@compile-flags: --test
+#![warn(clippy::exit)]
+
+fn also_not_main() {
+    std::process::exit(3);
+    //~^ exit
+}
+
+fn main() {
+    if true {
+        std::process::exit(2);
+    };
+    also_not_main();
+    std::process::exit(1);
+}
diff --git a/src/tools/clippy/tests/ui/exit2_compile_flag_test.stderr b/src/tools/clippy/tests/ui/exit2_compile_flag_test.stderr
new file mode 100644
index 00000000000..51eb26e9c2a
--- /dev/null
+++ b/src/tools/clippy/tests/ui/exit2_compile_flag_test.stderr
@@ -0,0 +1,11 @@
+error: usage of `process::exit`
+  --> tests/ui/exit2_compile_flag_test.rs:5:5
+   |
+LL |     std::process::exit(3);
+   |     ^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: `-D clippy::exit` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::exit)]`
+
+error: aborting due to 1 previous error
+
diff --git a/src/tools/clippy/tests/ui/exit3_compile_flag_test.rs b/src/tools/clippy/tests/ui/exit3_compile_flag_test.rs
new file mode 100644
index 00000000000..f8131ead2da
--- /dev/null
+++ b/src/tools/clippy/tests/ui/exit3_compile_flag_test.rs
@@ -0,0 +1,11 @@
+//@ check-pass
+//@compile-flags: --test
+
+#![warn(clippy::exit)]
+
+fn main() {
+    if true {
+        std::process::exit(2);
+    };
+    std::process::exit(1);
+}
diff --git a/src/tools/clippy/tests/ui/exit4.rs b/src/tools/clippy/tests/ui/exit4.rs
new file mode 100644
index 00000000000..821a26fd78b
--- /dev/null
+++ b/src/tools/clippy/tests/ui/exit4.rs
@@ -0,0 +1,8 @@
+//@ check-pass
+//@compile-flags: --test
+
+#![warn(clippy::exit)]
+
+fn main() {
+    std::process::exit(0)
+}
diff --git a/src/tools/clippy/tests/ui/floating_point_mul_add.fixed b/src/tools/clippy/tests/ui/floating_point_mul_add.fixed
index 83aeddb2a1f..884bae00432 100644
--- a/src/tools/clippy/tests/ui/floating_point_mul_add.fixed
+++ b/src/tools/clippy/tests/ui/floating_point_mul_add.fixed
@@ -69,3 +69,47 @@ fn _issue11831() {
 
     let _ = a + b * c;
 }
+
+fn _issue14897() {
+    let x = 1.0;
+    let _ = x * 2.0 + 0.5; // should not suggest mul_add
+    let _ = 0.5 + x * 2.0; // should not suggest mul_add
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+    let _ = 1.2 + x * 1.2; // should not suggest mul_add
+
+    let x = -1.0;
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+
+    let x = { 4.0 };
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+
+    let x = if 1 > 2 { 1.0 } else { 2.0 };
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+
+    let x = 2.4 + 1.2;
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+
+    let f = || 4.0;
+    let x = f();
+    let _ = 0.5 + f() * 1.2; // should not suggest mul_add
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+
+    let x = 0.1;
+    let y = x;
+    let z = y;
+    let _ = 0.5 + z * 1.2; // should not suggest mul_add
+
+    let _ = 2.0f64.mul_add(x, 0.5);
+    //~^ suboptimal_flops
+    let _ = 2.0f64.mul_add(x, 0.5);
+    //~^ suboptimal_flops
+
+    let _ = 2.0f64.mul_add(4.0, x);
+    //~^ suboptimal_flops
+
+    let y: f64 = 1.0;
+    let _ = y.mul_add(2.0, 0.5);
+    //~^ suboptimal_flops
+    let _ = 1.0f64.mul_add(2.0, 0.5);
+    //~^ suboptimal_flops
+}
diff --git a/src/tools/clippy/tests/ui/floating_point_mul_add.rs b/src/tools/clippy/tests/ui/floating_point_mul_add.rs
index 039ee8d053f..9ceb2ec9606 100644
--- a/src/tools/clippy/tests/ui/floating_point_mul_add.rs
+++ b/src/tools/clippy/tests/ui/floating_point_mul_add.rs
@@ -69,3 +69,47 @@ fn _issue11831() {
 
     let _ = a + b * c;
 }
+
+fn _issue14897() {
+    let x = 1.0;
+    let _ = x * 2.0 + 0.5; // should not suggest mul_add
+    let _ = 0.5 + x * 2.0; // should not suggest mul_add
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+    let _ = 1.2 + x * 1.2; // should not suggest mul_add
+
+    let x = -1.0;
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+
+    let x = { 4.0 };
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+
+    let x = if 1 > 2 { 1.0 } else { 2.0 };
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+
+    let x = 2.4 + 1.2;
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+
+    let f = || 4.0;
+    let x = f();
+    let _ = 0.5 + f() * 1.2; // should not suggest mul_add
+    let _ = 0.5 + x * 1.2; // should not suggest mul_add
+
+    let x = 0.1;
+    let y = x;
+    let z = y;
+    let _ = 0.5 + z * 1.2; // should not suggest mul_add
+
+    let _ = 0.5 + 2.0 * x;
+    //~^ suboptimal_flops
+    let _ = 2.0 * x + 0.5;
+    //~^ suboptimal_flops
+
+    let _ = x + 2.0 * 4.0;
+    //~^ suboptimal_flops
+
+    let y: f64 = 1.0;
+    let _ = y * 2.0 + 0.5;
+    //~^ suboptimal_flops
+    let _ = 1.0 * 2.0 + 0.5;
+    //~^ suboptimal_flops
+}
diff --git a/src/tools/clippy/tests/ui/floating_point_mul_add.stderr b/src/tools/clippy/tests/ui/floating_point_mul_add.stderr
index 6482127bcc0..dad65ddf2ec 100644
--- a/src/tools/clippy/tests/ui/floating_point_mul_add.stderr
+++ b/src/tools/clippy/tests/ui/floating_point_mul_add.stderr
@@ -79,5 +79,35 @@ error: multiply and add expressions can be calculated more efficiently and accur
 LL |     let _ = a - (b * u as f64);
    |             ^^^^^^^^^^^^^^^^^^ help: consider using: `b.mul_add(-(u as f64), a)`
 
-error: aborting due to 13 previous errors
+error: multiply and add expressions can be calculated more efficiently and accurately
+  --> tests/ui/floating_point_mul_add.rs:102:13
+   |
+LL |     let _ = 0.5 + 2.0 * x;
+   |             ^^^^^^^^^^^^^ help: consider using: `2.0f64.mul_add(x, 0.5)`
+
+error: multiply and add expressions can be calculated more efficiently and accurately
+  --> tests/ui/floating_point_mul_add.rs:104:13
+   |
+LL |     let _ = 2.0 * x + 0.5;
+   |             ^^^^^^^^^^^^^ help: consider using: `2.0f64.mul_add(x, 0.5)`
+
+error: multiply and add expressions can be calculated more efficiently and accurately
+  --> tests/ui/floating_point_mul_add.rs:107:13
+   |
+LL |     let _ = x + 2.0 * 4.0;
+   |             ^^^^^^^^^^^^^ help: consider using: `2.0f64.mul_add(4.0, x)`
+
+error: multiply and add expressions can be calculated more efficiently and accurately
+  --> tests/ui/floating_point_mul_add.rs:111:13
+   |
+LL |     let _ = y * 2.0 + 0.5;
+   |             ^^^^^^^^^^^^^ help: consider using: `y.mul_add(2.0, 0.5)`
+
+error: multiply and add expressions can be calculated more efficiently and accurately
+  --> tests/ui/floating_point_mul_add.rs:113:13
+   |
+LL |     let _ = 1.0 * 2.0 + 0.5;
+   |             ^^^^^^^^^^^^^^^ help: consider using: `1.0f64.mul_add(2.0, 0.5)`
+
+error: aborting due to 18 previous errors
 
diff --git a/src/tools/clippy/tests/ui/iter_over_hash_type.rs b/src/tools/clippy/tests/ui/iter_over_hash_type.rs
index 914cc9df0de..9a3e7033cd8 100644
--- a/src/tools/clippy/tests/ui/iter_over_hash_type.rs
+++ b/src/tools/clippy/tests/ui/iter_over_hash_type.rs
@@ -3,15 +3,18 @@
 #![warn(clippy::iter_over_hash_type)]
 use std::collections::{HashMap, HashSet};
 
-extern crate rustc_data_structures;
-
 extern crate proc_macros;
 
+// Ensure it also works via type aliases (this isn't really the Fx hasher but that does not matter).
+type FxBuildHasher = std::collections::hash_map::RandomState;
+type FxHashMap<K, V> = HashMap<K, V, FxBuildHasher>;
+type FxHashSet<K> = HashSet<K, FxBuildHasher>;
+
 fn main() {
     let mut hash_set = HashSet::<i32>::new();
     let mut hash_map = HashMap::<i32, i32>::new();
-    let mut fx_hash_map = rustc_data_structures::fx::FxHashMap::<i32, i32>::default();
-    let mut fx_hash_set = rustc_data_structures::fx::FxHashMap::<i32, i32>::default();
+    let mut fx_hash_map = FxHashMap::<i32, i32>::default();
+    let mut fx_hash_set = FxHashSet::<i32>::default();
     let vec = Vec::<i32>::new();
 
     // test hashset
diff --git a/src/tools/clippy/tests/ui/iter_over_hash_type.stderr b/src/tools/clippy/tests/ui/iter_over_hash_type.stderr
index 1bc6f4588d4..3356186547d 100644
--- a/src/tools/clippy/tests/ui/iter_over_hash_type.stderr
+++ b/src/tools/clippy/tests/ui/iter_over_hash_type.stderr
@@ -1,5 +1,5 @@
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:18:5
+  --> tests/ui/iter_over_hash_type.rs:21:5
    |
 LL | /     for x in &hash_set {
 LL | |
@@ -11,7 +11,7 @@ LL | |     }
    = help: to override `-D warnings` add `#[allow(clippy::iter_over_hash_type)]`
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:22:5
+  --> tests/ui/iter_over_hash_type.rs:25:5
    |
 LL | /     for x in hash_set.iter() {
 LL | |
@@ -20,7 +20,7 @@ LL | |     }
    | |_____^
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:26:5
+  --> tests/ui/iter_over_hash_type.rs:29:5
    |
 LL | /     for x in hash_set.clone() {
 LL | |
@@ -29,7 +29,7 @@ LL | |     }
    | |_____^
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:30:5
+  --> tests/ui/iter_over_hash_type.rs:33:5
    |
 LL | /     for x in hash_set.drain() {
 LL | |
@@ -38,7 +38,7 @@ LL | |     }
    | |_____^
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:36:5
+  --> tests/ui/iter_over_hash_type.rs:39:5
    |
 LL | /     for (x, y) in &hash_map {
 LL | |
@@ -47,7 +47,7 @@ LL | |     }
    | |_____^
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:40:5
+  --> tests/ui/iter_over_hash_type.rs:43:5
    |
 LL | /     for x in hash_map.keys() {
 LL | |
@@ -56,7 +56,7 @@ LL | |     }
    | |_____^
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:44:5
+  --> tests/ui/iter_over_hash_type.rs:47:5
    |
 LL | /     for x in hash_map.values() {
 LL | |
@@ -65,7 +65,7 @@ LL | |     }
    | |_____^
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:48:5
+  --> tests/ui/iter_over_hash_type.rs:51:5
    |
 LL | /     for x in hash_map.values_mut() {
 LL | |
@@ -74,7 +74,7 @@ LL | |     }
    | |_____^
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:52:5
+  --> tests/ui/iter_over_hash_type.rs:55:5
    |
 LL | /     for x in hash_map.iter() {
 LL | |
@@ -83,7 +83,7 @@ LL | |     }
    | |_____^
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:56:5
+  --> tests/ui/iter_over_hash_type.rs:59:5
    |
 LL | /     for x in hash_map.clone() {
 LL | |
@@ -92,7 +92,7 @@ LL | |     }
    | |_____^
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:60:5
+  --> tests/ui/iter_over_hash_type.rs:63:5
    |
 LL | /     for x in hash_map.drain() {
 LL | |
@@ -101,7 +101,7 @@ LL | |     }
    | |_____^
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:66:5
+  --> tests/ui/iter_over_hash_type.rs:69:5
    |
 LL | /     for x in fx_hash_set {
 LL | |
@@ -110,7 +110,7 @@ LL | |     }
    | |_____^
 
 error: iteration over unordered hash-based type
-  --> tests/ui/iter_over_hash_type.rs:70:5
+  --> tests/ui/iter_over_hash_type.rs:73:5
    |
 LL | /     for x in fx_hash_map {
 LL | |
diff --git a/src/tools/clippy/tests/ui/manual_is_variant_and.fixed b/src/tools/clippy/tests/ui/manual_is_variant_and.fixed
index 6425f32c09c..65a9cfa6e64 100644
--- a/src/tools/clippy/tests/ui/manual_is_variant_and.fixed
+++ b/src/tools/clippy/tests/ui/manual_is_variant_and.fixed
@@ -61,7 +61,7 @@ fn option_methods() {
 
     let _ = Some(2).is_some_and(|x| x % 2 == 0);
     //~^ manual_is_variant_and
-    let _ = Some(2).is_none_or(|x| x % 2 == 0);
+    let _ = Some(2).is_none_or(|x| x % 2 != 0);
     //~^ manual_is_variant_and
     let _ = Some(2).is_some_and(|x| x % 2 == 0);
     //~^ manual_is_variant_and
@@ -116,3 +116,113 @@ fn main() {
     option_methods();
     result_methods();
 }
+
+fn issue15202() {
+    let xs = [None, Some(b'_'), Some(b'1')];
+    for x in xs {
+        let a1 = x.is_none_or(|b| !b.is_ascii_digit());
+        //~^ manual_is_variant_and
+        let a2 = x.is_none_or(|b| !b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = x.is_none_or(|b| b.is_ascii_digit());
+        //~^ manual_is_variant_and
+        let a2 = x.is_none_or(|b| b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = x.is_some_and(|b| b.is_ascii_digit());
+        //~^ manual_is_variant_and
+        let a2 = x.is_some_and(|b| b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = x.is_some_and(|b| !b.is_ascii_digit());
+        //~^ manual_is_variant_and
+        let a2 = x.is_some_and(|b| !b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    let xs = [Err("foo"), Ok(b'_'), Ok(b'1')];
+    for x in xs {
+        let a1 = !x.is_ok_and(|b| b.is_ascii_digit());
+        //~^ manual_is_variant_and
+        let a2 = !x.is_ok_and(|b| b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = !x.is_ok_and(|b| !b.is_ascii_digit());
+        //~^ manual_is_variant_and
+        let a2 = !x.is_ok_and(|b| !b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = x.is_ok_and(|b| b.is_ascii_digit());
+        //~^ manual_is_variant_and
+        let a2 = x.is_ok_and(|b| b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = x.is_ok_and(|b| !b.is_ascii_digit());
+        //~^ manual_is_variant_and
+        let a2 = x.is_ok_and(|b| !b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+}
+
+mod with_func {
+    fn iad(b: u8) -> bool {
+        b.is_ascii_digit()
+    }
+
+    fn check_option(b: Option<u8>) {
+        let a1 = b.is_some_and(iad);
+        //~^ manual_is_variant_and
+        let a2 = b.is_some_and(iad);
+        assert_eq!(a1, a2);
+
+        let a1 = b.is_some_and(|x| !iad(x));
+        //~^ manual_is_variant_and
+        let a2 = b.is_some_and(|x| !iad(x));
+        assert_eq!(a1, a2);
+
+        let a1 = b.is_none_or(|x| !iad(x));
+        //~^ manual_is_variant_and
+        let a2 = b.is_none_or(|x| !iad(x));
+        assert_eq!(a1, a2);
+
+        let a1 = b.is_none_or(iad);
+        //~^ manual_is_variant_and
+        let a2 = b.is_none_or(iad);
+        assert_eq!(a1, a2);
+    }
+
+    fn check_result(b: Result<u8, ()>) {
+        let a1 = b.is_ok_and(iad);
+        //~^ manual_is_variant_and
+        let a2 = b.is_ok_and(iad);
+        assert_eq!(a1, a2);
+
+        let a1 = b.is_ok_and(|x| !iad(x));
+        //~^ manual_is_variant_and
+        let a2 = b.is_ok_and(|x| !iad(x));
+        assert_eq!(a1, a2);
+
+        let a1 = !b.is_ok_and(iad);
+        //~^ manual_is_variant_and
+        let a2 = !b.is_ok_and(iad);
+        assert_eq!(a1, a2);
+
+        let a1 = !b.is_ok_and(|x| !iad(x));
+        //~^ manual_is_variant_and
+        let a2 = !b.is_ok_and(|x| !iad(x));
+        assert_eq!(a1, a2);
+    }
+}
diff --git a/src/tools/clippy/tests/ui/manual_is_variant_and.rs b/src/tools/clippy/tests/ui/manual_is_variant_and.rs
index e069e97a04d..85b45d654a7 100644
--- a/src/tools/clippy/tests/ui/manual_is_variant_and.rs
+++ b/src/tools/clippy/tests/ui/manual_is_variant_and.rs
@@ -125,3 +125,113 @@ fn main() {
     option_methods();
     result_methods();
 }
+
+fn issue15202() {
+    let xs = [None, Some(b'_'), Some(b'1')];
+    for x in xs {
+        let a1 = x.map(|b| b.is_ascii_digit()) != Some(true);
+        //~^ manual_is_variant_and
+        let a2 = x.is_none_or(|b| !b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = x.map(|b| b.is_ascii_digit()) != Some(false);
+        //~^ manual_is_variant_and
+        let a2 = x.is_none_or(|b| b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = x.map(|b| b.is_ascii_digit()) == Some(true);
+        //~^ manual_is_variant_and
+        let a2 = x.is_some_and(|b| b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = x.map(|b| b.is_ascii_digit()) == Some(false);
+        //~^ manual_is_variant_and
+        let a2 = x.is_some_and(|b| !b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    let xs = [Err("foo"), Ok(b'_'), Ok(b'1')];
+    for x in xs {
+        let a1 = x.map(|b| b.is_ascii_digit()) != Ok(true);
+        //~^ manual_is_variant_and
+        let a2 = !x.is_ok_and(|b| b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = x.map(|b| b.is_ascii_digit()) != Ok(false);
+        //~^ manual_is_variant_and
+        let a2 = !x.is_ok_and(|b| !b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = x.map(|b| b.is_ascii_digit()) == Ok(true);
+        //~^ manual_is_variant_and
+        let a2 = x.is_ok_and(|b| b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+
+    for x in xs {
+        let a1 = x.map(|b| b.is_ascii_digit()) == Ok(false);
+        //~^ manual_is_variant_and
+        let a2 = x.is_ok_and(|b| !b.is_ascii_digit());
+        assert_eq!(a1, a2);
+    }
+}
+
+mod with_func {
+    fn iad(b: u8) -> bool {
+        b.is_ascii_digit()
+    }
+
+    fn check_option(b: Option<u8>) {
+        let a1 = b.map(iad) == Some(true);
+        //~^ manual_is_variant_and
+        let a2 = b.is_some_and(iad);
+        assert_eq!(a1, a2);
+
+        let a1 = b.map(iad) == Some(false);
+        //~^ manual_is_variant_and
+        let a2 = b.is_some_and(|x| !iad(x));
+        assert_eq!(a1, a2);
+
+        let a1 = b.map(iad) != Some(true);
+        //~^ manual_is_variant_and
+        let a2 = b.is_none_or(|x| !iad(x));
+        assert_eq!(a1, a2);
+
+        let a1 = b.map(iad) != Some(false);
+        //~^ manual_is_variant_and
+        let a2 = b.is_none_or(iad);
+        assert_eq!(a1, a2);
+    }
+
+    fn check_result(b: Result<u8, ()>) {
+        let a1 = b.map(iad) == Ok(true);
+        //~^ manual_is_variant_and
+        let a2 = b.is_ok_and(iad);
+        assert_eq!(a1, a2);
+
+        let a1 = b.map(iad) == Ok(false);
+        //~^ manual_is_variant_and
+        let a2 = b.is_ok_and(|x| !iad(x));
+        assert_eq!(a1, a2);
+
+        let a1 = b.map(iad) != Ok(true);
+        //~^ manual_is_variant_and
+        let a2 = !b.is_ok_and(iad);
+        assert_eq!(a1, a2);
+
+        let a1 = b.map(iad) != Ok(false);
+        //~^ manual_is_variant_and
+        let a2 = !b.is_ok_and(|x| !iad(x));
+        assert_eq!(a1, a2);
+    }
+}
diff --git a/src/tools/clippy/tests/ui/manual_is_variant_and.stderr b/src/tools/clippy/tests/ui/manual_is_variant_and.stderr
index f770319a268..da36b5a07d2 100644
--- a/src/tools/clippy/tests/ui/manual_is_variant_and.stderr
+++ b/src/tools/clippy/tests/ui/manual_is_variant_and.stderr
@@ -54,7 +54,7 @@ error: called `.map() != Some()`
   --> tests/ui/manual_is_variant_and.rs:70:13
    |
 LL |     let _ = Some(2).map(|x| x % 2 == 0) != Some(true);
-   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `Some(2).is_none_or(|x| x % 2 == 0)`
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `Some(2).is_none_or(|x| x % 2 != 0)`
 
 error: called `.map() == Some()`
   --> tests/ui/manual_is_variant_and.rs:72:13
@@ -126,5 +126,101 @@ error: called `map(<f>).unwrap_or_default()` on a `Result` value
 LL |     let _ = res2.map(char::is_alphanumeric).unwrap_or_default(); // should lint
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `is_ok_and(char::is_alphanumeric)`
 
-error: aborting due to 15 previous errors
+error: called `.map() != Some()`
+  --> tests/ui/manual_is_variant_and.rs:132:18
+   |
+LL |         let a1 = x.map(|b| b.is_ascii_digit()) != Some(true);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `x.is_none_or(|b| !b.is_ascii_digit())`
+
+error: called `.map() != Some()`
+  --> tests/ui/manual_is_variant_and.rs:139:18
+   |
+LL |         let a1 = x.map(|b| b.is_ascii_digit()) != Some(false);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `x.is_none_or(|b| b.is_ascii_digit())`
+
+error: called `.map() == Some()`
+  --> tests/ui/manual_is_variant_and.rs:146:18
+   |
+LL |         let a1 = x.map(|b| b.is_ascii_digit()) == Some(true);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `x.is_some_and(|b| b.is_ascii_digit())`
+
+error: called `.map() == Some()`
+  --> tests/ui/manual_is_variant_and.rs:153:18
+   |
+LL |         let a1 = x.map(|b| b.is_ascii_digit()) == Some(false);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `x.is_some_and(|b| !b.is_ascii_digit())`
+
+error: called `.map() != Ok()`
+  --> tests/ui/manual_is_variant_and.rs:161:18
+   |
+LL |         let a1 = x.map(|b| b.is_ascii_digit()) != Ok(true);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `!x.is_ok_and(|b| b.is_ascii_digit())`
+
+error: called `.map() != Ok()`
+  --> tests/ui/manual_is_variant_and.rs:168:18
+   |
+LL |         let a1 = x.map(|b| b.is_ascii_digit()) != Ok(false);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `!x.is_ok_and(|b| !b.is_ascii_digit())`
+
+error: called `.map() == Ok()`
+  --> tests/ui/manual_is_variant_and.rs:175:18
+   |
+LL |         let a1 = x.map(|b| b.is_ascii_digit()) == Ok(true);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `x.is_ok_and(|b| b.is_ascii_digit())`
+
+error: called `.map() == Ok()`
+  --> tests/ui/manual_is_variant_and.rs:182:18
+   |
+LL |         let a1 = x.map(|b| b.is_ascii_digit()) == Ok(false);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `x.is_ok_and(|b| !b.is_ascii_digit())`
+
+error: called `.map() == Some()`
+  --> tests/ui/manual_is_variant_and.rs:195:18
+   |
+LL |         let a1 = b.map(iad) == Some(true);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `b.is_some_and(iad)`
+
+error: called `.map() == Some()`
+  --> tests/ui/manual_is_variant_and.rs:200:18
+   |
+LL |         let a1 = b.map(iad) == Some(false);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `b.is_some_and(|x| !iad(x))`
+
+error: called `.map() != Some()`
+  --> tests/ui/manual_is_variant_and.rs:205:18
+   |
+LL |         let a1 = b.map(iad) != Some(true);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `b.is_none_or(|x| !iad(x))`
+
+error: called `.map() != Some()`
+  --> tests/ui/manual_is_variant_and.rs:210:18
+   |
+LL |         let a1 = b.map(iad) != Some(false);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `b.is_none_or(iad)`
+
+error: called `.map() == Ok()`
+  --> tests/ui/manual_is_variant_and.rs:217:18
+   |
+LL |         let a1 = b.map(iad) == Ok(true);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^ help: use: `b.is_ok_and(iad)`
+
+error: called `.map() == Ok()`
+  --> tests/ui/manual_is_variant_and.rs:222:18
+   |
+LL |         let a1 = b.map(iad) == Ok(false);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^ help: use: `b.is_ok_and(|x| !iad(x))`
+
+error: called `.map() != Ok()`
+  --> tests/ui/manual_is_variant_and.rs:227:18
+   |
+LL |         let a1 = b.map(iad) != Ok(true);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^ help: use: `!b.is_ok_and(iad)`
+
+error: called `.map() != Ok()`
+  --> tests/ui/manual_is_variant_and.rs:232:18
+   |
+LL |         let a1 = b.map(iad) != Ok(false);
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^ help: use: `!b.is_ok_and(|x| !iad(x))`
+
+error: aborting due to 31 previous errors
 
diff --git a/src/tools/clippy/tests/ui/manual_let_else_match.fixed b/src/tools/clippy/tests/ui/manual_let_else_match.fixed
index 588ba5edd8f..15f604aec29 100644
--- a/src/tools/clippy/tests/ui/manual_let_else_match.fixed
+++ b/src/tools/clippy/tests/ui/manual_let_else_match.fixed
@@ -137,3 +137,48 @@ fn not_fire() {
 fn issue11579() {
     let Some(msg) = Some("hi") else { unreachable!("can't happen") };
 }
+
+#[derive(Clone, Copy)]
+struct Issue9939<T> {
+    avalanche: T,
+}
+
+fn issue9939() {
+    let issue = Some(Issue9939 { avalanche: 1 });
+    let Some(Issue9939 { avalanche: tornado }) = issue else { unreachable!("can't happen") };
+    let issue = Some(Issue9939 { avalanche: true });
+    let Some(Issue9939 { avalanche: acid_rain }) = issue else { unreachable!("can't happen") };
+    assert_eq!(tornado, 1);
+    assert!(acid_rain);
+
+    // without shadowing
+    let _x @ Some(Issue9939 { avalanche: _y }) = issue else { unreachable!("can't happen") };
+
+    // with shadowing
+    let Some(Issue9939 { avalanche: _x }) = issue else { unreachable!("can't happen") };
+}
+
+#[derive(Clone, Copy)]
+struct Issue9939b<T, U> {
+    earthquake: T,
+    hurricane: U,
+}
+
+fn issue9939b() {
+    let issue = Some(Issue9939b {
+        earthquake: true,
+        hurricane: 1,
+    });
+    let issue @ Some(Issue9939b { earthquake: flood, hurricane: drought }) = issue else { unreachable!("can't happen") };
+    assert_eq!(drought, 1);
+    assert!(flood);
+    assert!(issue.is_some());
+
+    // without shadowing
+    let _x @ Some(Issue9939b { earthquake: erosion, hurricane: _y }) = issue else { unreachable!("can't happen") };
+    assert!(erosion);
+
+    // with shadowing
+    let Some(Issue9939b { earthquake: erosion, hurricane: _x }) = issue else { unreachable!("can't happen") };
+    assert!(erosion);
+}
diff --git a/src/tools/clippy/tests/ui/manual_let_else_match.rs b/src/tools/clippy/tests/ui/manual_let_else_match.rs
index 6416753bac1..44a044b142b 100644
--- a/src/tools/clippy/tests/ui/manual_let_else_match.rs
+++ b/src/tools/clippy/tests/ui/manual_let_else_match.rs
@@ -177,3 +177,76 @@ fn issue11579() {
         _ => unreachable!("can't happen"),
     };
 }
+
+#[derive(Clone, Copy)]
+struct Issue9939<T> {
+    avalanche: T,
+}
+
+fn issue9939() {
+    let issue = Some(Issue9939 { avalanche: 1 });
+    let tornado = match issue {
+        //~^ manual_let_else
+        Some(Issue9939 { avalanche }) => avalanche,
+        _ => unreachable!("can't happen"),
+    };
+    let issue = Some(Issue9939 { avalanche: true });
+    let acid_rain = match issue {
+        //~^ manual_let_else
+        Some(Issue9939 { avalanche: tornado }) => tornado,
+        _ => unreachable!("can't happen"),
+    };
+    assert_eq!(tornado, 1);
+    assert!(acid_rain);
+
+    // without shadowing
+    let _y = match issue {
+        //~^ manual_let_else
+        _x @ Some(Issue9939 { avalanche }) => avalanche,
+        None => unreachable!("can't happen"),
+    };
+
+    // with shadowing
+    let _x = match issue {
+        //~^ manual_let_else
+        _x @ Some(Issue9939 { avalanche }) => avalanche,
+        None => unreachable!("can't happen"),
+    };
+}
+
+#[derive(Clone, Copy)]
+struct Issue9939b<T, U> {
+    earthquake: T,
+    hurricane: U,
+}
+
+fn issue9939b() {
+    let issue = Some(Issue9939b {
+        earthquake: true,
+        hurricane: 1,
+    });
+    let (issue, drought, flood) = match issue {
+        //~^ manual_let_else
+        flood @ Some(Issue9939b { earthquake, hurricane }) => (flood, hurricane, earthquake),
+        None => unreachable!("can't happen"),
+    };
+    assert_eq!(drought, 1);
+    assert!(flood);
+    assert!(issue.is_some());
+
+    // without shadowing
+    let (_y, erosion) = match issue {
+        //~^ manual_let_else
+        _x @ Some(Issue9939b { earthquake, hurricane }) => (hurricane, earthquake),
+        None => unreachable!("can't happen"),
+    };
+    assert!(erosion);
+
+    // with shadowing
+    let (_x, erosion) = match issue {
+        //~^ manual_let_else
+        _x @ Some(Issue9939b { earthquake, hurricane }) => (hurricane, earthquake),
+        None => unreachable!("can't happen"),
+    };
+    assert!(erosion);
+}
diff --git a/src/tools/clippy/tests/ui/manual_let_else_match.stderr b/src/tools/clippy/tests/ui/manual_let_else_match.stderr
index 393562c629b..ed6117ebffb 100644
--- a/src/tools/clippy/tests/ui/manual_let_else_match.stderr
+++ b/src/tools/clippy/tests/ui/manual_let_else_match.stderr
@@ -101,5 +101,75 @@ LL | |         _ => unreachable!("can't happen"),
 LL | |     };
    | |______^ help: consider writing: `let Some(msg) = Some("hi") else { unreachable!("can't happen") };`
 
-error: aborting due to 10 previous errors
+error: this could be rewritten as `let...else`
+  --> tests/ui/manual_let_else_match.rs:188:5
+   |
+LL | /     let tornado = match issue {
+LL | |
+LL | |         Some(Issue9939 { avalanche }) => avalanche,
+LL | |         _ => unreachable!("can't happen"),
+LL | |     };
+   | |______^ help: consider writing: `let Some(Issue9939 { avalanche: tornado }) = issue else { unreachable!("can't happen") };`
+
+error: this could be rewritten as `let...else`
+  --> tests/ui/manual_let_else_match.rs:194:5
+   |
+LL | /     let acid_rain = match issue {
+LL | |
+LL | |         Some(Issue9939 { avalanche: tornado }) => tornado,
+LL | |         _ => unreachable!("can't happen"),
+LL | |     };
+   | |______^ help: consider writing: `let Some(Issue9939 { avalanche: acid_rain }) = issue else { unreachable!("can't happen") };`
+
+error: this could be rewritten as `let...else`
+  --> tests/ui/manual_let_else_match.rs:203:5
+   |
+LL | /     let _y = match issue {
+LL | |
+LL | |         _x @ Some(Issue9939 { avalanche }) => avalanche,
+LL | |         None => unreachable!("can't happen"),
+LL | |     };
+   | |______^ help: consider writing: `let _x @ Some(Issue9939 { avalanche: _y }) = issue else { unreachable!("can't happen") };`
+
+error: this could be rewritten as `let...else`
+  --> tests/ui/manual_let_else_match.rs:210:5
+   |
+LL | /     let _x = match issue {
+LL | |
+LL | |         _x @ Some(Issue9939 { avalanche }) => avalanche,
+LL | |         None => unreachable!("can't happen"),
+LL | |     };
+   | |______^ help: consider writing: `let Some(Issue9939 { avalanche: _x }) = issue else { unreachable!("can't happen") };`
+
+error: this could be rewritten as `let...else`
+  --> tests/ui/manual_let_else_match.rs:228:5
+   |
+LL | /     let (issue, drought, flood) = match issue {
+LL | |
+LL | |         flood @ Some(Issue9939b { earthquake, hurricane }) => (flood, hurricane, earthquake),
+LL | |         None => unreachable!("can't happen"),
+LL | |     };
+   | |______^ help: consider writing: `let issue @ Some(Issue9939b { earthquake: flood, hurricane: drought }) = issue else { unreachable!("can't happen") };`
+
+error: this could be rewritten as `let...else`
+  --> tests/ui/manual_let_else_match.rs:238:5
+   |
+LL | /     let (_y, erosion) = match issue {
+LL | |
+LL | |         _x @ Some(Issue9939b { earthquake, hurricane }) => (hurricane, earthquake),
+LL | |         None => unreachable!("can't happen"),
+LL | |     };
+   | |______^ help: consider writing: `let _x @ Some(Issue9939b { earthquake: erosion, hurricane: _y }) = issue else { unreachable!("can't happen") };`
+
+error: this could be rewritten as `let...else`
+  --> tests/ui/manual_let_else_match.rs:246:5
+   |
+LL | /     let (_x, erosion) = match issue {
+LL | |
+LL | |         _x @ Some(Issue9939b { earthquake, hurricane }) => (hurricane, earthquake),
+LL | |         None => unreachable!("can't happen"),
+LL | |     };
+   | |______^ help: consider writing: `let Some(Issue9939b { earthquake: erosion, hurricane: _x }) = issue else { unreachable!("can't happen") };`
+
+error: aborting due to 17 previous errors
 
diff --git a/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.fixed b/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.fixed
index f1d5579a723..c113c1caaa6 100644
--- a/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.fixed
+++ b/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.fixed
@@ -3,8 +3,7 @@
 
 // Reduced test case from https://github.com/rust-lang/rust-clippy/issues/14658
 
-#[const_trait]
-trait ConstTrait {
+const trait ConstTrait {
     fn method(self);
 }
 
diff --git a/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.rs b/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.rs
index d495759526d..69248bc52d5 100644
--- a/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.rs
+++ b/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.rs
@@ -3,8 +3,7 @@
 
 // Reduced test case from https://github.com/rust-lang/rust-clippy/issues/14658
 
-#[const_trait]
-trait ConstTrait {
+const trait ConstTrait {
     fn method(self);
 }
 
diff --git a/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.stderr b/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.stderr
index b994b88fac6..7ea009cfc9b 100644
--- a/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.stderr
+++ b/src/tools/clippy/tests/ui/missing_const_for_fn/const_trait.stderr
@@ -1,5 +1,5 @@
 error: this could be a `const fn`
-  --> tests/ui/missing_const_for_fn/const_trait.rs:24:1
+  --> tests/ui/missing_const_for_fn/const_trait.rs:23:1
    |
 LL | / fn can_be_const() {
 LL | |     0u64.method();
diff --git a/src/tools/clippy/tests/ui/missing_panics_doc.rs b/src/tools/clippy/tests/ui/missing_panics_doc.rs
index ffdae8504f7..d016e099e30 100644
--- a/src/tools/clippy/tests/ui/missing_panics_doc.rs
+++ b/src/tools/clippy/tests/ui/missing_panics_doc.rs
@@ -250,3 +250,31 @@ pub fn issue_12760<const N: usize>() {
         }
     }
 }
+
+/// This needs documenting
+pub fn unwrap_expect_etc_in_const() {
+    let a = const { std::num::NonZeroUsize::new(1).unwrap() };
+    // This should still pass the lint even if it is guaranteed to panic at compile-time
+    let b = const { std::num::NonZeroUsize::new(0).unwrap() };
+}
+
+/// This needs documenting
+pub const fn unwrap_expect_etc_in_const_fn_fails() {
+    //~^ missing_panics_doc
+    let a = std::num::NonZeroUsize::new(1).unwrap();
+}
+
+/// This needs documenting
+pub const fn assert_in_const_fn_fails() {
+    //~^ missing_panics_doc
+    let x = 0;
+    if x == 0 {
+        panic!();
+    }
+}
+
+/// This needs documenting
+pub const fn in_const_fn<const N: usize>(n: usize) {
+    //~^ missing_panics_doc
+    assert!(N > n);
+}
diff --git a/src/tools/clippy/tests/ui/missing_panics_doc.stderr b/src/tools/clippy/tests/ui/missing_panics_doc.stderr
index 7f0acf8de9b..85a00914427 100644
--- a/src/tools/clippy/tests/ui/missing_panics_doc.stderr
+++ b/src/tools/clippy/tests/ui/missing_panics_doc.stderr
@@ -180,5 +180,41 @@ note: first possible panic found here
 LL |         *v.last().expect("passed an empty thing")
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: aborting due to 15 previous errors
+error: docs for function which may panic missing `# Panics` section
+  --> tests/ui/missing_panics_doc.rs:262:1
+   |
+LL | pub const fn unwrap_expect_etc_in_const_fn_fails() {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: first possible panic found here
+  --> tests/ui/missing_panics_doc.rs:264:13
+   |
+LL |     let a = std::num::NonZeroUsize::new(1).unwrap();
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: docs for function which may panic missing `# Panics` section
+  --> tests/ui/missing_panics_doc.rs:268:1
+   |
+LL | pub const fn assert_in_const_fn_fails() {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: first possible panic found here
+  --> tests/ui/missing_panics_doc.rs:272:9
+   |
+LL |         panic!();
+   |         ^^^^^^^^
+
+error: docs for function which may panic missing `# Panics` section
+  --> tests/ui/missing_panics_doc.rs:277:1
+   |
+LL | pub const fn in_const_fn<const N: usize>(n: usize) {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: first possible panic found here
+  --> tests/ui/missing_panics_doc.rs:279:5
+   |
+LL |     assert!(N > n);
+   |     ^^^^^^^^^^^^^^
+
+error: aborting due to 18 previous errors
 
diff --git a/src/tools/clippy/tests/ui/needless_bool_assign.fixed b/src/tools/clippy/tests/ui/needless_bool_assign.fixed
index e0c717ecda2..d6fab4c51b5 100644
--- a/src/tools/clippy/tests/ui/needless_bool_assign.fixed
+++ b/src/tools/clippy/tests/ui/needless_bool_assign.fixed
@@ -33,3 +33,12 @@ fn main() {
         b = true;
     }
 }
+
+fn issue15063(x: bool, y: bool) {
+    let mut z = false;
+
+    if x && y {
+        todo!()
+    } else { z = x || y; }
+    //~^^^^^ needless_bool_assign
+}
diff --git a/src/tools/clippy/tests/ui/needless_bool_assign.rs b/src/tools/clippy/tests/ui/needless_bool_assign.rs
index 3e4fecefa78..c504f61f4dd 100644
--- a/src/tools/clippy/tests/ui/needless_bool_assign.rs
+++ b/src/tools/clippy/tests/ui/needless_bool_assign.rs
@@ -45,3 +45,16 @@ fn main() {
         b = true;
     }
 }
+
+fn issue15063(x: bool, y: bool) {
+    let mut z = false;
+
+    if x && y {
+        todo!()
+    } else if x || y {
+        z = true;
+    } else {
+        z = false;
+    }
+    //~^^^^^ needless_bool_assign
+}
diff --git a/src/tools/clippy/tests/ui/needless_bool_assign.stderr b/src/tools/clippy/tests/ui/needless_bool_assign.stderr
index f33a4bc0c59..1d09b8b25a0 100644
--- a/src/tools/clippy/tests/ui/needless_bool_assign.stderr
+++ b/src/tools/clippy/tests/ui/needless_bool_assign.stderr
@@ -51,5 +51,16 @@ LL | |     }
    = note: `-D clippy::if-same-then-else` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::if_same_then_else)]`
 
-error: aborting due to 4 previous errors
+error: this if-then-else expression assigns a bool literal
+  --> tests/ui/needless_bool_assign.rs:54:12
+   |
+LL |       } else if x || y {
+   |  ____________^
+LL | |         z = true;
+LL | |     } else {
+LL | |         z = false;
+LL | |     }
+   | |_____^ help: you can reduce it to: `{ z = x || y; }`
+
+error: aborting due to 5 previous errors
 
diff --git a/src/tools/clippy/tests/ui/neg_multiply.fixed b/src/tools/clippy/tests/ui/neg_multiply.fixed
index ff6e08300e2..32d466e88fc 100644
--- a/src/tools/clippy/tests/ui/neg_multiply.fixed
+++ b/src/tools/clippy/tests/ui/neg_multiply.fixed
@@ -82,3 +82,15 @@ fn float() {
 
     -1.0 * -1.0; // should be ok
 }
+
+struct Y {
+    delta: f64,
+}
+
+fn nested() {
+    let a = Y { delta: 1.0 };
+    let b = Y { delta: 1.0 };
+    let _ = (-(a.delta - 0.5).abs()).total_cmp(&1.0);
+    //~^ neg_multiply
+    let _ = (-(a.delta - 0.5).abs()).total_cmp(&1.0);
+}
diff --git a/src/tools/clippy/tests/ui/neg_multiply.rs b/src/tools/clippy/tests/ui/neg_multiply.rs
index b0f4e85c78e..241a72c6d99 100644
--- a/src/tools/clippy/tests/ui/neg_multiply.rs
+++ b/src/tools/clippy/tests/ui/neg_multiply.rs
@@ -82,3 +82,15 @@ fn float() {
 
     -1.0 * -1.0; // should be ok
 }
+
+struct Y {
+    delta: f64,
+}
+
+fn nested() {
+    let a = Y { delta: 1.0 };
+    let b = Y { delta: 1.0 };
+    let _ = ((a.delta - 0.5).abs() * -1.0).total_cmp(&1.0);
+    //~^ neg_multiply
+    let _ = (-(a.delta - 0.5).abs()).total_cmp(&1.0);
+}
diff --git a/src/tools/clippy/tests/ui/neg_multiply.stderr b/src/tools/clippy/tests/ui/neg_multiply.stderr
index 2ef7e32ce05..f4fb6d3ce54 100644
--- a/src/tools/clippy/tests/ui/neg_multiply.stderr
+++ b/src/tools/clippy/tests/ui/neg_multiply.stderr
@@ -97,5 +97,11 @@ error: this multiplication by -1 can be written more succinctly
 LL |     (3.0_f32 as f64) * -1.0;
    |     ^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `-(3.0_f32 as f64)`
 
-error: aborting due to 16 previous errors
+error: this multiplication by -1 can be written more succinctly
+  --> tests/ui/neg_multiply.rs:93:13
+   |
+LL |     let _ = ((a.delta - 0.5).abs() * -1.0).total_cmp(&1.0);
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `(-(a.delta - 0.5).abs())`
+
+error: aborting due to 17 previous errors
 
diff --git a/src/tools/clippy/tests/ui/op_ref.fixed b/src/tools/clippy/tests/ui/op_ref.fixed
index f412190b9fd..4bf4b91888c 100644
--- a/src/tools/clippy/tests/ui/op_ref.fixed
+++ b/src/tools/clippy/tests/ui/op_ref.fixed
@@ -110,3 +110,37 @@ mod issue_2597 {
         &array[idx] < val
     }
 }
+
+#[allow(clippy::needless_if)]
+fn issue15063() {
+    use std::ops::BitAnd;
+
+    macro_rules! mac {
+        ($e:expr) => {
+            $e.clone()
+        };
+    }
+
+    let x = 1;
+    if x == mac!(1) {}
+    //~^ op_ref
+
+    #[derive(Copy, Clone)]
+    struct Y(i32);
+    impl BitAnd for Y {
+        type Output = Y;
+        fn bitand(self, rhs: Y) -> Y {
+            Y(self.0 & rhs.0)
+        }
+    }
+    impl<'a> BitAnd<&'a Y> for Y {
+        type Output = Y;
+        fn bitand(self, rhs: &'a Y) -> Y {
+            Y(self.0 & rhs.0)
+        }
+    }
+    let x = Y(1);
+    let y = Y(2);
+    let z = x & mac!(y);
+    //~^ op_ref
+}
diff --git a/src/tools/clippy/tests/ui/op_ref.rs b/src/tools/clippy/tests/ui/op_ref.rs
index a4bbd86c7e9..9a192661aaf 100644
--- a/src/tools/clippy/tests/ui/op_ref.rs
+++ b/src/tools/clippy/tests/ui/op_ref.rs
@@ -110,3 +110,37 @@ mod issue_2597 {
         &array[idx] < val
     }
 }
+
+#[allow(clippy::needless_if)]
+fn issue15063() {
+    use std::ops::BitAnd;
+
+    macro_rules! mac {
+        ($e:expr) => {
+            $e.clone()
+        };
+    }
+
+    let x = 1;
+    if &x == &mac!(1) {}
+    //~^ op_ref
+
+    #[derive(Copy, Clone)]
+    struct Y(i32);
+    impl BitAnd for Y {
+        type Output = Y;
+        fn bitand(self, rhs: Y) -> Y {
+            Y(self.0 & rhs.0)
+        }
+    }
+    impl<'a> BitAnd<&'a Y> for Y {
+        type Output = Y;
+        fn bitand(self, rhs: &'a Y) -> Y {
+            Y(self.0 & rhs.0)
+        }
+    }
+    let x = Y(1);
+    let y = Y(2);
+    let z = x & &mac!(y);
+    //~^ op_ref
+}
diff --git a/src/tools/clippy/tests/ui/op_ref.stderr b/src/tools/clippy/tests/ui/op_ref.stderr
index 51c2963a9ee..8a58b154c81 100644
--- a/src/tools/clippy/tests/ui/op_ref.stderr
+++ b/src/tools/clippy/tests/ui/op_ref.stderr
@@ -36,5 +36,25 @@ LL |         let _ = two + &three;
    |                       |
    |                       help: use the right value directly: `three`
 
-error: aborting due to 4 previous errors
+error: needlessly taken reference of both operands
+  --> tests/ui/op_ref.rs:125:8
+   |
+LL |     if &x == &mac!(1) {}
+   |        ^^^^^^^^^^^^^^
+   |
+help: use the values directly
+   |
+LL -     if &x == &mac!(1) {}
+LL +     if x == mac!(1) {}
+   |
+
+error: taken reference of right operand
+  --> tests/ui/op_ref.rs:144:13
+   |
+LL |     let z = x & &mac!(y);
+   |             ^^^^--------
+   |                 |
+   |                 help: use the right value directly: `mac!(y)`
+
+error: aborting due to 6 previous errors
 
diff --git a/src/tools/clippy/tests/ui/or_fun_call.fixed b/src/tools/clippy/tests/ui/or_fun_call.fixed
index 34f3e046841..bcd2602edb6 100644
--- a/src/tools/clippy/tests/ui/or_fun_call.fixed
+++ b/src/tools/clippy/tests/ui/or_fun_call.fixed
@@ -439,4 +439,24 @@ fn test_option_get_or_insert() {
     //~^ or_fun_call
 }
 
+fn test_option_and() {
+    // assume that this is slow call
+    fn g() -> Option<u8> {
+        Some(99)
+    }
+    let mut x = Some(42_u8);
+    let _ = x.and_then(|_| g());
+    //~^ or_fun_call
+}
+
+fn test_result_and() {
+    // assume that this is slow call
+    fn g() -> Result<u8, ()> {
+        Ok(99)
+    }
+    let mut x: Result<u8, ()> = Ok(42);
+    let _ = x.and_then(|_| g());
+    //~^ or_fun_call
+}
+
 fn main() {}
diff --git a/src/tools/clippy/tests/ui/or_fun_call.rs b/src/tools/clippy/tests/ui/or_fun_call.rs
index dc57bd6060a..8d1202ebf91 100644
--- a/src/tools/clippy/tests/ui/or_fun_call.rs
+++ b/src/tools/clippy/tests/ui/or_fun_call.rs
@@ -439,4 +439,24 @@ fn test_option_get_or_insert() {
     //~^ or_fun_call
 }
 
+fn test_option_and() {
+    // assume that this is slow call
+    fn g() -> Option<u8> {
+        Some(99)
+    }
+    let mut x = Some(42_u8);
+    let _ = x.and(g());
+    //~^ or_fun_call
+}
+
+fn test_result_and() {
+    // assume that this is slow call
+    fn g() -> Result<u8, ()> {
+        Ok(99)
+    }
+    let mut x: Result<u8, ()> = Ok(42);
+    let _ = x.and(g());
+    //~^ or_fun_call
+}
+
 fn main() {}
diff --git a/src/tools/clippy/tests/ui/or_fun_call.stderr b/src/tools/clippy/tests/ui/or_fun_call.stderr
index 0f159fe8bff..585ee2d0e19 100644
--- a/src/tools/clippy/tests/ui/or_fun_call.stderr
+++ b/src/tools/clippy/tests/ui/or_fun_call.stderr
@@ -264,5 +264,17 @@ error: function call inside of `get_or_insert`
 LL |     let _ = x.get_or_insert(g());
    |               ^^^^^^^^^^^^^^^^^^ help: try: `get_or_insert_with(g)`
 
-error: aborting due to 41 previous errors
+error: function call inside of `and`
+  --> tests/ui/or_fun_call.rs:448:15
+   |
+LL |     let _ = x.and(g());
+   |               ^^^^^^^^ help: try: `and_then(|_| g())`
+
+error: function call inside of `and`
+  --> tests/ui/or_fun_call.rs:458:15
+   |
+LL |     let _ = x.and(g());
+   |               ^^^^^^^^ help: try: `and_then(|_| g())`
+
+error: aborting due to 43 previous errors
 
diff --git a/src/tools/clippy/tests/ui/partialeq_ne_impl.stderr b/src/tools/clippy/tests/ui/partialeq_ne_impl.stderr
index dc01a375060..0f700654f7c 100644
--- a/src/tools/clippy/tests/ui/partialeq_ne_impl.stderr
+++ b/src/tools/clippy/tests/ui/partialeq_ne_impl.stderr
@@ -1,12 +1,8 @@
 error: re-implementing `PartialEq::ne` is unnecessary
   --> tests/ui/partialeq_ne_impl.rs:9:5
    |
-LL | /     fn ne(&self, _: &Foo) -> bool {
-LL | |
-LL | |
-LL | |         false
-LL | |     }
-   | |_____^
+LL |     fn ne(&self, _: &Foo) -> bool {
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: `-D clippy::partialeq-ne-impl` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::partialeq_ne_impl)]`
diff --git a/src/tools/clippy/tests/ui/ptr_arg.rs b/src/tools/clippy/tests/ui/ptr_arg.rs
index 65f3f05d6cb..578641e910d 100644
--- a/src/tools/clippy/tests/ui/ptr_arg.rs
+++ b/src/tools/clippy/tests/ui/ptr_arg.rs
@@ -312,7 +312,7 @@ mod issue_9218 {
 
     // Inferred to be `&'a str`, afaik.
     fn cow_good_ret_ty<'a>(input: &'a Cow<'a, str>) -> &str {
-        //~^ ERROR: lifetime flowing from input to output with different syntax
+        //~^ ERROR: eliding a lifetime that's named elsewhere is confusing
         todo!()
     }
 }
diff --git a/src/tools/clippy/tests/ui/ptr_arg.stderr b/src/tools/clippy/tests/ui/ptr_arg.stderr
index 600343754e1..fd9ceddfe11 100644
--- a/src/tools/clippy/tests/ui/ptr_arg.stderr
+++ b/src/tools/clippy/tests/ui/ptr_arg.stderr
@@ -231,18 +231,19 @@ error: writing `&String` instead of `&str` involves a new object where a slice w
 LL |     fn good(v1: &String, v2: &String) {
    |                              ^^^^^^^ help: change this to: `&str`
 
-error: lifetime flowing from input to output with different syntax can be confusing
+error: eliding a lifetime that's named elsewhere is confusing
   --> tests/ui/ptr_arg.rs:314:36
    |
 LL |     fn cow_good_ret_ty<'a>(input: &'a Cow<'a, str>) -> &str {
-   |                                    ^^     ^^           ---- the lifetime gets resolved as `'a`
+   |                                    ^^     ^^           ---- the same lifetime is elided here
    |                                    |      |
-   |                                    |      these lifetimes flow to the output
-   |                                    these lifetimes flow to the output
+   |                                    |      the lifetime is named here
+   |                                    the lifetime is named here
    |
+   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
    = note: `-D mismatched-lifetime-syntaxes` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(mismatched_lifetime_syntaxes)]`
-help: one option is to consistently use `'a`
+help: consistently use `'a`
    |
 LL |     fn cow_good_ret_ty<'a>(input: &'a Cow<'a, str>) -> &'a str {
    |                                                         ++
diff --git a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed
index 099c118e64e..9f6643e8d52 100644
--- a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed
+++ b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed
@@ -60,7 +60,7 @@ fn issue9956() {
     //~^ redundant_closure_call
 
     // immediately calling only one closure, so we can't remove the other ones
-    let a = (|| || 123);
+    let a = || || 123;
     //~^ redundant_closure_call
     dbg!(a()());
 
@@ -144,3 +144,15 @@ fn issue_12358() {
     // different.
     make_closure!(x)();
 }
+
+#[rustfmt::skip]
+fn issue_9583() {
+    Some(true) == Some(true);
+     //~^ redundant_closure_call
+    Some(true) == Some(true);
+    //~^ redundant_closure_call
+    Some(if 1 > 2 {1} else {2}) == Some(2);
+    //~^ redundant_closure_call
+    Some( 1 > 2 ) == Some(true);
+    //~^ redundant_closure_call
+}
diff --git a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs
index da5dd7ef263..34f22878678 100644
--- a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs
+++ b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs
@@ -144,3 +144,15 @@ fn issue_12358() {
     // different.
     make_closure!(x)();
 }
+
+#[rustfmt::skip]
+fn issue_9583() {
+    (|| { Some(true) })() == Some(true);
+     //~^ redundant_closure_call
+    (|| Some(true))() == Some(true);
+    //~^ redundant_closure_call
+    (|| { Some(if 1 > 2 {1} else {2}) })() == Some(2);
+    //~^ redundant_closure_call
+    (|| { Some( 1 > 2 ) })() == Some(true);
+    //~^ redundant_closure_call
+}
diff --git a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.stderr b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.stderr
index 2c35aafbe31..a5591cf7813 100644
--- a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.stderr
+++ b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.stderr
@@ -95,7 +95,7 @@ error: try not to call a closure in the expression where it is declared
   --> tests/ui/redundant_closure_call_fixable.rs:63:13
    |
 LL |     let a = (|| || || 123)();
-   |             ^^^^^^^^^^^^^^^^ help: try doing something like: `(|| || 123)`
+   |             ^^^^^^^^^^^^^^^^ help: try doing something like: `|| || 123`
 
 error: try not to call a closure in the expression where it is declared
   --> tests/ui/redundant_closure_call_fixable.rs:68:13
@@ -145,5 +145,29 @@ error: try not to call a closure in the expression where it is declared
 LL |     std::convert::identity((|| 13_i32 + 36_i32)()).leading_zeros();
    |                            ^^^^^^^^^^^^^^^^^^^^^^ help: try doing something like: `13_i32 + 36_i32`
 
-error: aborting due to 17 previous errors
+error: try not to call a closure in the expression where it is declared
+  --> tests/ui/redundant_closure_call_fixable.rs:150:5
+   |
+LL |     (|| { Some(true) })() == Some(true);
+   |     ^^^^^^^^^^^^^^^^^^^^^ help: try doing something like: `Some(true)`
+
+error: try not to call a closure in the expression where it is declared
+  --> tests/ui/redundant_closure_call_fixable.rs:152:5
+   |
+LL |     (|| Some(true))() == Some(true);
+   |     ^^^^^^^^^^^^^^^^^ help: try doing something like: `Some(true)`
+
+error: try not to call a closure in the expression where it is declared
+  --> tests/ui/redundant_closure_call_fixable.rs:154:5
+   |
+LL |     (|| { Some(if 1 > 2 {1} else {2}) })() == Some(2);
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try doing something like: `Some(if 1 > 2 {1} else {2})`
+
+error: try not to call a closure in the expression where it is declared
+  --> tests/ui/redundant_closure_call_fixable.rs:156:5
+   |
+LL |     (|| { Some( 1 > 2 ) })() == Some(true);
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: try doing something like: `Some( 1 > 2 )`
+
+error: aborting due to 21 previous errors
 
diff --git a/src/tools/clippy/tests/ui/return_and_then.fixed b/src/tools/clippy/tests/ui/return_and_then.fixed
index 8d9481d1595..8ee259b97f3 100644
--- a/src/tools/clippy/tests/ui/return_and_then.fixed
+++ b/src/tools/clippy/tests/ui/return_and_then.fixed
@@ -99,6 +99,92 @@ fn main() {
         };
         None
     }
+
+    #[expect(clippy::diverging_sub_expression)]
+    fn with_return_in_expression() -> Option<i32> {
+        _ = (
+            return {
+                let x = Some("")?;
+                if x.len() > 2 { Some(3) } else { None }
+            },
+            //~^ return_and_then
+            10,
+        );
+    }
+
+    fn inside_if(a: bool, i: Option<u32>) -> Option<u32> {
+        if a {
+            let i = i?;
+            if i > 3 { Some(i) } else { None }
+            //~^ return_and_then
+        } else {
+            Some(42)
+        }
+    }
+
+    fn inside_match(a: u32, i: Option<u32>) -> Option<u32> {
+        match a {
+            1 | 2 => {
+                let i = i?;
+                if i > 3 { Some(i) } else { None }
+            },
+            //~^ return_and_then
+            3 | 4 => Some(42),
+            _ => None,
+        }
+    }
+
+    fn inside_match_and_block_and_if(a: u32, i: Option<u32>) -> Option<u32> {
+        match a {
+            1 | 2 => {
+                let a = a * 3;
+                if a.is_multiple_of(2) {
+                    let i = i?;
+                    if i > 3 { Some(i) } else { None }
+                    //~^ return_and_then
+                } else {
+                    Some(10)
+                }
+            },
+            3 | 4 => Some(42),
+            _ => None,
+        }
+    }
+
+    #[expect(clippy::never_loop)]
+    fn with_break(i: Option<u32>) -> Option<u32> {
+        match i {
+            Some(1) => loop {
+                break ({
+                    let i = i?;
+                    if i > 3 { Some(i) } else { None }
+                });
+                //~^ return_and_then
+            },
+            Some(2) => 'foo: loop {
+                loop {
+                    break 'foo ({
+                        let i = i?;
+                        if i > 3 { Some(i) } else { None }
+                    });
+                    //~^ return_and_then
+                }
+            },
+            Some(3) => 'bar: {
+                break 'bar ({
+                    let i = i?;
+                    if i > 3 { Some(i) } else { None }
+                });
+                //~^ return_and_then
+            },
+            Some(4) => 'baz: loop {
+                _ = loop {
+                    break i.and_then(|i| if i > 3 { Some(i) } else { None });
+                };
+            },
+            _ => None,
+        }
+    }
 }
 
 fn gen_option(n: i32) -> Option<i32> {
@@ -124,3 +210,48 @@ mod issue14781 {
         Ok(())
     }
 }
+
+mod issue15111 {
+    #[derive(Debug)]
+    struct EvenOdd {
+        even: Option<u32>,
+        odd: Option<u32>,
+    }
+
+    impl EvenOdd {
+        fn new(i: Option<u32>) -> Self {
+            Self {
+                even: i.and_then(|i| if i.is_multiple_of(2) { Some(i) } else { None }),
+                odd: i.and_then(|i| if i.is_multiple_of(2) { None } else { Some(i) }),
+            }
+        }
+    }
+
+    fn with_if_let(i: Option<u32>) -> u32 {
+        if let Some(x) = i.and_then(|i| if i.is_multiple_of(2) { Some(i) } else { None }) {
+            x
+        } else {
+            std::hint::black_box(0)
+        }
+    }
+
+    fn main() {
+        let _ = EvenOdd::new(Some(2));
+    }
+}
+
+mod issue14927 {
+    use std::path::Path;
+    struct A {
+        pub func: fn(check: bool, a: &Path, b: Option<&Path>),
+    }
+    const MY_A: A = A {
+        func: |check, a, b| {
+            if check {
+                let _ = ();
+            } else if let Some(parent) = b.and_then(|p| p.parent()) {
+                let _ = ();
+            }
+        },
+    };
+}
diff --git a/src/tools/clippy/tests/ui/return_and_then.rs b/src/tools/clippy/tests/ui/return_and_then.rs
index beada921a91..dcb344f142b 100644
--- a/src/tools/clippy/tests/ui/return_and_then.rs
+++ b/src/tools/clippy/tests/ui/return_and_then.rs
@@ -90,6 +90,75 @@ fn main() {
         };
         None
     }
+
+    #[expect(clippy::diverging_sub_expression)]
+    fn with_return_in_expression() -> Option<i32> {
+        _ = (
+            return Some("").and_then(|x| if x.len() > 2 { Some(3) } else { None }),
+            //~^ return_and_then
+            10,
+        );
+    }
+
+    fn inside_if(a: bool, i: Option<u32>) -> Option<u32> {
+        if a {
+            i.and_then(|i| if i > 3 { Some(i) } else { None })
+            //~^ return_and_then
+        } else {
+            Some(42)
+        }
+    }
+
+    fn inside_match(a: u32, i: Option<u32>) -> Option<u32> {
+        match a {
+            1 | 2 => i.and_then(|i| if i > 3 { Some(i) } else { None }),
+            //~^ return_and_then
+            3 | 4 => Some(42),
+            _ => None,
+        }
+    }
+
+    fn inside_match_and_block_and_if(a: u32, i: Option<u32>) -> Option<u32> {
+        match a {
+            1 | 2 => {
+                let a = a * 3;
+                if a.is_multiple_of(2) {
+                    i.and_then(|i| if i > 3 { Some(i) } else { None })
+                    //~^ return_and_then
+                } else {
+                    Some(10)
+                }
+            },
+            3 | 4 => Some(42),
+            _ => None,
+        }
+    }
+
+    #[expect(clippy::never_loop)]
+    fn with_break(i: Option<u32>) -> Option<u32> {
+        match i {
+            Some(1) => loop {
+                break i.and_then(|i| if i > 3 { Some(i) } else { None });
+                //~^ return_and_then
+            },
+            Some(2) => 'foo: loop {
+                loop {
+                    break 'foo i.and_then(|i| if i > 3 { Some(i) } else { None });
+                    //~^ return_and_then
+                }
+            },
+            Some(3) => 'bar: {
+                break 'bar i.and_then(|i| if i > 3 { Some(i) } else { None });
+                //~^ return_and_then
+            },
+            Some(4) => 'baz: loop {
+                _ = loop {
+                    break i.and_then(|i| if i > 3 { Some(i) } else { None });
+                };
+            },
+            _ => None,
+        }
+    }
 }
 
 fn gen_option(n: i32) -> Option<i32> {
@@ -115,3 +184,48 @@ mod issue14781 {
         Ok(())
     }
 }
+
+mod issue15111 {
+    #[derive(Debug)]
+    struct EvenOdd {
+        even: Option<u32>,
+        odd: Option<u32>,
+    }
+
+    impl EvenOdd {
+        fn new(i: Option<u32>) -> Self {
+            Self {
+                even: i.and_then(|i| if i.is_multiple_of(2) { Some(i) } else { None }),
+                odd: i.and_then(|i| if i.is_multiple_of(2) { None } else { Some(i) }),
+            }
+        }
+    }
+
+    fn with_if_let(i: Option<u32>) -> u32 {
+        if let Some(x) = i.and_then(|i| if i.is_multiple_of(2) { Some(i) } else { None }) {
+            x
+        } else {
+            std::hint::black_box(0)
+        }
+    }
+
+    fn main() {
+        let _ = EvenOdd::new(Some(2));
+    }
+}
+
+mod issue14927 {
+    use std::path::Path;
+    struct A {
+        pub func: fn(check: bool, a: &Path, b: Option<&Path>),
+    }
+    const MY_A: A = A {
+        func: |check, a, b| {
+            if check {
+                let _ = ();
+            } else if let Some(parent) = b.and_then(|p| p.parent()) {
+                let _ = ();
+            }
+        },
+    };
+}
diff --git a/src/tools/clippy/tests/ui/return_and_then.stderr b/src/tools/clippy/tests/ui/return_and_then.stderr
index 5feca882860..33867ea818a 100644
--- a/src/tools/clippy/tests/ui/return_and_then.stderr
+++ b/src/tools/clippy/tests/ui/return_and_then.stderr
@@ -146,5 +146,99 @@ LL +                 if x.len() > 2 { Some(3) } else { None }
 LL ~             };
    |
 
-error: aborting due to 10 previous errors
+error: use the `?` operator instead of an `and_then` call
+  --> tests/ui/return_and_then.rs:97:20
+   |
+LL |             return Some("").and_then(|x| if x.len() > 2 { Some(3) } else { None }),
+   |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: try
+   |
+LL ~             return {
+LL +                 let x = Some("")?;
+LL +                 if x.len() > 2 { Some(3) } else { None }
+LL ~             },
+   |
+
+error: use the `?` operator instead of an `and_then` call
+  --> tests/ui/return_and_then.rs:105:13
+   |
+LL |             i.and_then(|i| if i > 3 { Some(i) } else { None })
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: try
+   |
+LL ~             let i = i?;
+LL +             if i > 3 { Some(i) } else { None }
+   |
+
+error: use the `?` operator instead of an `and_then` call
+  --> tests/ui/return_and_then.rs:114:22
+   |
+LL |             1 | 2 => i.and_then(|i| if i > 3 { Some(i) } else { None }),
+   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: try
+   |
+LL ~             1 | 2 => {
+LL +                 let i = i?;
+LL +                 if i > 3 { Some(i) } else { None }
+LL ~             },
+   |
+
+error: use the `?` operator instead of an `and_then` call
+  --> tests/ui/return_and_then.rs:126:21
+   |
+LL |                     i.and_then(|i| if i > 3 { Some(i) } else { None })
+   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: try
+   |
+LL ~                     let i = i?;
+LL +                     if i > 3 { Some(i) } else { None }
+   |
+
+error: use the `?` operator instead of an `and_then` call
+  --> tests/ui/return_and_then.rs:141:23
+   |
+LL |                 break i.and_then(|i| if i > 3 { Some(i) } else { None });
+   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: try
+   |
+LL ~                 break ({
+LL +                     let i = i?;
+LL +                     if i > 3 { Some(i) } else { None }
+LL ~                 });
+   |
+
+error: use the `?` operator instead of an `and_then` call
+  --> tests/ui/return_and_then.rs:146:32
+   |
+LL |                     break 'foo i.and_then(|i| if i > 3 { Some(i) } else { None });
+   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: try
+   |
+LL ~                     break 'foo ({
+LL +                         let i = i?;
+LL +                         if i > 3 { Some(i) } else { None }
+LL ~                     });
+   |
+
+error: use the `?` operator instead of an `and_then` call
+  --> tests/ui/return_and_then.rs:151:28
+   |
+LL |                 break 'bar i.and_then(|i| if i > 3 { Some(i) } else { None });
+   |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: try
+   |
+LL ~                 break 'bar ({
+LL +                     let i = i?;
+LL +                     if i > 3 { Some(i) } else { None }
+LL ~                 });
+   |
+
+error: aborting due to 17 previous errors
 
diff --git a/src/tools/clippy/tests/ui/same_name_method.stderr b/src/tools/clippy/tests/ui/same_name_method.stderr
index b2624ac4d26..bf7456d80e2 100644
--- a/src/tools/clippy/tests/ui/same_name_method.stderr
+++ b/src/tools/clippy/tests/ui/same_name_method.stderr
@@ -2,13 +2,13 @@ error: method's name is the same as an existing method in a trait
   --> tests/ui/same_name_method.rs:20:13
    |
 LL |             fn foo() {}
-   |             ^^^^^^^^^^^
+   |             ^^^^^^^^
    |
 note: existing `foo` defined here
   --> tests/ui/same_name_method.rs:25:13
    |
 LL |             fn foo() {}
-   |             ^^^^^^^^^^^
+   |             ^^^^^^^^
    = note: `-D clippy::same-name-method` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::same_name_method)]`
 
@@ -16,7 +16,7 @@ error: method's name is the same as an existing method in a trait
   --> tests/ui/same_name_method.rs:35:13
    |
 LL |             fn clone() {}
-   |             ^^^^^^^^^^^^^
+   |             ^^^^^^^^^^
    |
 note: existing `clone` defined here
   --> tests/ui/same_name_method.rs:31:18
@@ -28,19 +28,19 @@ error: method's name is the same as an existing method in a trait
   --> tests/ui/same_name_method.rs:46:13
    |
 LL |             fn foo() {}
-   |             ^^^^^^^^^^^
+   |             ^^^^^^^^
    |
 note: existing `foo` defined here
   --> tests/ui/same_name_method.rs:51:13
    |
 LL |             fn foo() {}
-   |             ^^^^^^^^^^^
+   |             ^^^^^^^^
 
 error: method's name is the same as an existing method in a trait
   --> tests/ui/same_name_method.rs:61:13
    |
 LL |             fn foo() {}
-   |             ^^^^^^^^^^^
+   |             ^^^^^^^^
    |
 note: existing `foo` defined here
   --> tests/ui/same_name_method.rs:65:9
@@ -52,7 +52,7 @@ error: method's name is the same as an existing method in a trait
   --> tests/ui/same_name_method.rs:74:13
    |
 LL |             fn foo() {}
-   |             ^^^^^^^^^^^
+   |             ^^^^^^^^
    |
 note: existing `foo` defined here
   --> tests/ui/same_name_method.rs:79:9
@@ -64,7 +64,7 @@ error: method's name is the same as an existing method in a trait
   --> tests/ui/same_name_method.rs:74:13
    |
 LL |             fn foo() {}
-   |             ^^^^^^^^^^^
+   |             ^^^^^^^^
    |
 note: existing `foo` defined here
   --> tests/ui/same_name_method.rs:81:9
diff --git a/src/tools/clippy/tests/ui/serde.stderr b/src/tools/clippy/tests/ui/serde.stderr
index eb6b7c6b0c3..652248e3578 100644
--- a/src/tools/clippy/tests/ui/serde.stderr
+++ b/src/tools/clippy/tests/ui/serde.stderr
@@ -5,10 +5,7 @@ LL | /     fn visit_string<E>(self, _v: String) -> Result<Self::Value, E>
 LL | |
 LL | |     where
 LL | |         E: serde::de::Error,
-LL | |     {
-LL | |         unimplemented!()
-LL | |     }
-   | |_____^
+   | |____________________________^
    |
    = note: `-D clippy::serde-api-misuse` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::serde_api_misuse)]`
diff --git a/src/tools/clippy/tests/ui/std_instead_of_core.fixed b/src/tools/clippy/tests/ui/std_instead_of_core.fixed
index 1820ade422f..603ab0accb0 100644
--- a/src/tools/clippy/tests/ui/std_instead_of_core.fixed
+++ b/src/tools/clippy/tests/ui/std_instead_of_core.fixed
@@ -8,7 +8,6 @@ extern crate alloc;
 #[macro_use]
 extern crate proc_macro_derive;
 
-#[warn(clippy::std_instead_of_core)]
 fn std_instead_of_core() {
     // Regular import
     use core::hash::Hasher;
@@ -90,9 +89,3 @@ fn msrv_1_76(_: std::net::IpAddr) {}
 #[clippy::msrv = "1.77"]
 fn msrv_1_77(_: core::net::IpAddr) {}
 //~^ std_instead_of_core
-
-#[warn(clippy::std_instead_of_core)]
-#[rustfmt::skip]
-fn issue14982() {
-    use std::{collections::HashMap, hash::Hash};
-}
diff --git a/src/tools/clippy/tests/ui/std_instead_of_core.rs b/src/tools/clippy/tests/ui/std_instead_of_core.rs
index 32c49330981..b6d4abad9f8 100644
--- a/src/tools/clippy/tests/ui/std_instead_of_core.rs
+++ b/src/tools/clippy/tests/ui/std_instead_of_core.rs
@@ -8,7 +8,6 @@ extern crate alloc;
 #[macro_use]
 extern crate proc_macro_derive;
 
-#[warn(clippy::std_instead_of_core)]
 fn std_instead_of_core() {
     // Regular import
     use std::hash::Hasher;
@@ -90,9 +89,3 @@ fn msrv_1_76(_: std::net::IpAddr) {}
 #[clippy::msrv = "1.77"]
 fn msrv_1_77(_: std::net::IpAddr) {}
 //~^ std_instead_of_core
-
-#[warn(clippy::std_instead_of_core)]
-#[rustfmt::skip]
-fn issue14982() {
-    use std::{collections::HashMap, hash::Hash};
-}
diff --git a/src/tools/clippy/tests/ui/std_instead_of_core.stderr b/src/tools/clippy/tests/ui/std_instead_of_core.stderr
index 45d60d235ce..a5f8fbbe37c 100644
--- a/src/tools/clippy/tests/ui/std_instead_of_core.stderr
+++ b/src/tools/clippy/tests/ui/std_instead_of_core.stderr
@@ -1,5 +1,5 @@
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:14:9
+  --> tests/ui/std_instead_of_core.rs:13:9
    |
 LL |     use std::hash::Hasher;
    |         ^^^ help: consider importing the item from `core`: `core`
@@ -8,61 +8,61 @@ LL |     use std::hash::Hasher;
    = help: to override `-D warnings` add `#[allow(clippy::std_instead_of_core)]`
 
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:17:11
+  --> tests/ui/std_instead_of_core.rs:16:11
    |
 LL |     use ::std::hash::Hash;
    |           ^^^ help: consider importing the item from `core`: `core`
 
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:23:9
+  --> tests/ui/std_instead_of_core.rs:22:9
    |
 LL |     use std::fmt::{Debug, Result};
    |         ^^^ help: consider importing the item from `core`: `core`
 
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:28:9
+  --> tests/ui/std_instead_of_core.rs:27:9
    |
 LL |     use std::{
    |         ^^^ help: consider importing the item from `core`: `core`
 
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:35:15
+  --> tests/ui/std_instead_of_core.rs:34:15
    |
 LL |     let ptr = std::ptr::null::<u32>();
    |               ^^^ help: consider importing the item from `core`: `core`
 
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:37:21
+  --> tests/ui/std_instead_of_core.rs:36:21
    |
 LL |     let ptr_mut = ::std::ptr::null_mut::<usize>();
    |                     ^^^ help: consider importing the item from `core`: `core`
 
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:41:16
+  --> tests/ui/std_instead_of_core.rs:40:16
    |
 LL |     let cell = std::cell::Cell::new(8u32);
    |                ^^^ help: consider importing the item from `core`: `core`
 
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:43:27
+  --> tests/ui/std_instead_of_core.rs:42:27
    |
 LL |     let cell_absolute = ::std::cell::Cell::new(8u32);
    |                           ^^^ help: consider importing the item from `core`: `core`
 
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:48:9
+  --> tests/ui/std_instead_of_core.rs:47:9
    |
 LL |     use std::error::Error;
    |         ^^^ help: consider importing the item from `core`: `core`
 
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:52:9
+  --> tests/ui/std_instead_of_core.rs:51:9
    |
 LL |     use std::iter::Iterator;
    |         ^^^ help: consider importing the item from `core`: `core`
 
 error: used import from `std` instead of `alloc`
-  --> tests/ui/std_instead_of_core.rs:59:9
+  --> tests/ui/std_instead_of_core.rs:58:9
    |
 LL |     use std::vec;
    |         ^^^ help: consider importing the item from `alloc`: `alloc`
@@ -71,13 +71,13 @@ LL |     use std::vec;
    = help: to override `-D warnings` add `#[allow(clippy::std_instead_of_alloc)]`
 
 error: used import from `std` instead of `alloc`
-  --> tests/ui/std_instead_of_core.rs:61:9
+  --> tests/ui/std_instead_of_core.rs:60:9
    |
 LL |     use std::vec::Vec;
    |         ^^^ help: consider importing the item from `alloc`: `alloc`
 
 error: used import from `alloc` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:67:9
+  --> tests/ui/std_instead_of_core.rs:66:9
    |
 LL |     use alloc::slice::from_ref;
    |         ^^^^^ help: consider importing the item from `core`: `core`
@@ -86,13 +86,13 @@ LL |     use alloc::slice::from_ref;
    = help: to override `-D warnings` add `#[allow(clippy::alloc_instead_of_core)]`
 
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:82:9
+  --> tests/ui/std_instead_of_core.rs:81:9
    |
 LL |         std::intrinsics::copy(a, b, 1);
    |         ^^^ help: consider importing the item from `core`: `core`
 
 error: used import from `std` instead of `core`
-  --> tests/ui/std_instead_of_core.rs:91:17
+  --> tests/ui/std_instead_of_core.rs:90:17
    |
 LL | fn msrv_1_77(_: std::net::IpAddr) {}
    |                 ^^^ help: consider importing the item from `core`: `core`
diff --git a/src/tools/clippy/tests/ui/std_instead_of_core_unfixable.rs b/src/tools/clippy/tests/ui/std_instead_of_core_unfixable.rs
new file mode 100644
index 00000000000..957f472a454
--- /dev/null
+++ b/src/tools/clippy/tests/ui/std_instead_of_core_unfixable.rs
@@ -0,0 +1,18 @@
+//@no-rustfix
+
+#![warn(clippy::std_instead_of_core)]
+#![warn(clippy::std_instead_of_alloc)]
+#![allow(unused_imports)]
+
+#[rustfmt::skip]
+fn issue14982() {
+    use std::{collections::HashMap, hash::Hash};
+    //~^ std_instead_of_core
+}
+
+#[rustfmt::skip]
+fn issue15143() {
+    use std::{error::Error, vec::Vec, fs::File};
+    //~^ std_instead_of_core
+    //~| std_instead_of_alloc
+}
diff --git a/src/tools/clippy/tests/ui/std_instead_of_core_unfixable.stderr b/src/tools/clippy/tests/ui/std_instead_of_core_unfixable.stderr
new file mode 100644
index 00000000000..0cdec56c992
--- /dev/null
+++ b/src/tools/clippy/tests/ui/std_instead_of_core_unfixable.stderr
@@ -0,0 +1,30 @@
+error: used import from `std` instead of `core`
+  --> tests/ui/std_instead_of_core_unfixable.rs:9:43
+   |
+LL |     use std::{collections::HashMap, hash::Hash};
+   |                                           ^^^^
+   |
+   = help: consider importing the item from `core`
+   = note: `-D clippy::std-instead-of-core` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::std_instead_of_core)]`
+
+error: used import from `std` instead of `core`
+  --> tests/ui/std_instead_of_core_unfixable.rs:15:22
+   |
+LL |     use std::{error::Error, vec::Vec, fs::File};
+   |                      ^^^^^
+   |
+   = help: consider importing the item from `core`
+
+error: used import from `std` instead of `alloc`
+  --> tests/ui/std_instead_of_core_unfixable.rs:15:34
+   |
+LL |     use std::{error::Error, vec::Vec, fs::File};
+   |                                  ^^^
+   |
+   = help: consider importing the item from `alloc`
+   = note: `-D clippy::std-instead-of-alloc` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::std_instead_of_alloc)]`
+
+error: aborting due to 3 previous errors
+
diff --git a/src/tools/clippy/tests/ui/strlen_on_c_strings.fixed b/src/tools/clippy/tests/ui/strlen_on_c_strings.fixed
index 31ed1cf03a2..17c1b541f77 100644
--- a/src/tools/clippy/tests/ui/strlen_on_c_strings.fixed
+++ b/src/tools/clippy/tests/ui/strlen_on_c_strings.fixed
@@ -1,7 +1,5 @@
 #![warn(clippy::strlen_on_c_strings)]
 #![allow(dead_code, clippy::manual_c_str_literals)]
-#![feature(rustc_private)]
-extern crate libc;
 
 #[allow(unused)]
 use libc::strlen;
diff --git a/src/tools/clippy/tests/ui/strlen_on_c_strings.rs b/src/tools/clippy/tests/ui/strlen_on_c_strings.rs
index 0f3798c9fd8..c641422f5df 100644
--- a/src/tools/clippy/tests/ui/strlen_on_c_strings.rs
+++ b/src/tools/clippy/tests/ui/strlen_on_c_strings.rs
@@ -1,7 +1,5 @@
 #![warn(clippy::strlen_on_c_strings)]
 #![allow(dead_code, clippy::manual_c_str_literals)]
-#![feature(rustc_private)]
-extern crate libc;
 
 #[allow(unused)]
 use libc::strlen;
diff --git a/src/tools/clippy/tests/ui/strlen_on_c_strings.stderr b/src/tools/clippy/tests/ui/strlen_on_c_strings.stderr
index b8619fa2df3..84a93b99ee3 100644
--- a/src/tools/clippy/tests/ui/strlen_on_c_strings.stderr
+++ b/src/tools/clippy/tests/ui/strlen_on_c_strings.stderr
@@ -1,5 +1,5 @@
 error: using `libc::strlen` on a `CString` or `CStr` value
-  --> tests/ui/strlen_on_c_strings.rs:13:13
+  --> tests/ui/strlen_on_c_strings.rs:11:13
    |
 LL |     let _ = unsafe { libc::strlen(cstring.as_ptr()) };
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `cstring.as_bytes().len()`
@@ -8,37 +8,37 @@ LL |     let _ = unsafe { libc::strlen(cstring.as_ptr()) };
    = help: to override `-D warnings` add `#[allow(clippy::strlen_on_c_strings)]`
 
 error: using `libc::strlen` on a `CString` or `CStr` value
-  --> tests/ui/strlen_on_c_strings.rs:18:13
+  --> tests/ui/strlen_on_c_strings.rs:16:13
    |
 LL |     let _ = unsafe { libc::strlen(cstr.as_ptr()) };
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `cstr.to_bytes().len()`
 
 error: using `libc::strlen` on a `CString` or `CStr` value
-  --> tests/ui/strlen_on_c_strings.rs:21:13
+  --> tests/ui/strlen_on_c_strings.rs:19:13
    |
 LL |     let _ = unsafe { strlen(cstr.as_ptr()) };
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `cstr.to_bytes().len()`
 
 error: using `libc::strlen` on a `CString` or `CStr` value
-  --> tests/ui/strlen_on_c_strings.rs:25:22
+  --> tests/ui/strlen_on_c_strings.rs:23:22
    |
 LL |     let _ = unsafe { strlen((*pcstr).as_ptr()) };
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(*pcstr).to_bytes().len()`
 
 error: using `libc::strlen` on a `CString` or `CStr` value
-  --> tests/ui/strlen_on_c_strings.rs:31:22
+  --> tests/ui/strlen_on_c_strings.rs:29:22
    |
 LL |     let _ = unsafe { strlen(unsafe_identity(cstr).as_ptr()) };
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unsafe_identity(cstr).to_bytes().len()`
 
 error: using `libc::strlen` on a `CString` or `CStr` value
-  --> tests/ui/strlen_on_c_strings.rs:33:13
+  --> tests/ui/strlen_on_c_strings.rs:31:13
    |
 LL |     let _ = unsafe { strlen(unsafe { unsafe_identity(cstr) }.as_ptr()) };
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unsafe { unsafe_identity(cstr) }.to_bytes().len()`
 
 error: using `libc::strlen` on a `CString` or `CStr` value
-  --> tests/ui/strlen_on_c_strings.rs:37:22
+  --> tests/ui/strlen_on_c_strings.rs:35:22
    |
 LL |     let _ = unsafe { strlen(f(cstr).as_ptr()) };
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f(cstr).to_bytes().len()`
diff --git a/src/tools/clippy/tests/ui/swap_with_temporary.fixed b/src/tools/clippy/tests/ui/swap_with_temporary.fixed
index 4007d998ba0..4b4b0d4aebd 100644
--- a/src/tools/clippy/tests/ui/swap_with_temporary.fixed
+++ b/src/tools/clippy/tests/ui/swap_with_temporary.fixed
@@ -72,3 +72,49 @@ fn dont_lint_those(s: &mut S, v: &mut [String], w: Option<&mut String>) {
     swap(&mut s.t, v.get_mut(0).unwrap());
     swap(w.unwrap(), &mut s.t);
 }
+
+fn issue15166() {
+    use std::sync::Mutex;
+
+    struct A {
+        thing: Mutex<Vec<u8>>,
+    }
+
+    impl A {
+        fn a(&self) {
+            let mut new_vec = vec![42];
+            // Do not lint here, as neither `new_vec` nor the result of `.lock().unwrap()` are temporaries
+            swap(&mut new_vec, &mut self.thing.lock().unwrap());
+            for v in new_vec {
+                // Do something with v
+            }
+            // Here `vec![42]` is temporary though, and a proper dereference will have to be used in the fix
+            *self.thing.lock().unwrap() = vec![42];
+            //~^ ERROR: swapping with a temporary value is inefficient
+        }
+    }
+}
+
+fn multiple_deref() {
+    let mut v1 = &mut &mut &mut vec![42];
+    ***v1 = vec![];
+    //~^ ERROR: swapping with a temporary value is inefficient
+
+    struct Wrapper<T: ?Sized>(T);
+    impl<T: ?Sized> std::ops::Deref for Wrapper<T> {
+        type Target = T;
+        fn deref(&self) -> &Self::Target {
+            &self.0
+        }
+    }
+    impl<T: ?Sized> std::ops::DerefMut for Wrapper<T> {
+        fn deref_mut(&mut self) -> &mut Self::Target {
+            &mut self.0
+        }
+    }
+
+    use std::sync::Mutex;
+    let mut v1 = Mutex::new(Wrapper(Wrapper(vec![42])));
+    ***v1.lock().unwrap() = vec![];
+    //~^ ERROR: swapping with a temporary value is inefficient
+}
diff --git a/src/tools/clippy/tests/ui/swap_with_temporary.rs b/src/tools/clippy/tests/ui/swap_with_temporary.rs
index d403c086c0f..8e35e6144d9 100644
--- a/src/tools/clippy/tests/ui/swap_with_temporary.rs
+++ b/src/tools/clippy/tests/ui/swap_with_temporary.rs
@@ -72,3 +72,49 @@ fn dont_lint_those(s: &mut S, v: &mut [String], w: Option<&mut String>) {
     swap(&mut s.t, v.get_mut(0).unwrap());
     swap(w.unwrap(), &mut s.t);
 }
+
+fn issue15166() {
+    use std::sync::Mutex;
+
+    struct A {
+        thing: Mutex<Vec<u8>>,
+    }
+
+    impl A {
+        fn a(&self) {
+            let mut new_vec = vec![42];
+            // Do not lint here, as neither `new_vec` nor the result of `.lock().unwrap()` are temporaries
+            swap(&mut new_vec, &mut self.thing.lock().unwrap());
+            for v in new_vec {
+                // Do something with v
+            }
+            // Here `vec![42]` is temporary though, and a proper dereference will have to be used in the fix
+            swap(&mut vec![42], &mut self.thing.lock().unwrap());
+            //~^ ERROR: swapping with a temporary value is inefficient
+        }
+    }
+}
+
+fn multiple_deref() {
+    let mut v1 = &mut &mut &mut vec![42];
+    swap(&mut ***v1, &mut vec![]);
+    //~^ ERROR: swapping with a temporary value is inefficient
+
+    struct Wrapper<T: ?Sized>(T);
+    impl<T: ?Sized> std::ops::Deref for Wrapper<T> {
+        type Target = T;
+        fn deref(&self) -> &Self::Target {
+            &self.0
+        }
+    }
+    impl<T: ?Sized> std::ops::DerefMut for Wrapper<T> {
+        fn deref_mut(&mut self) -> &mut Self::Target {
+            &mut self.0
+        }
+    }
+
+    use std::sync::Mutex;
+    let mut v1 = Mutex::new(Wrapper(Wrapper(vec![42])));
+    swap(&mut vec![], &mut v1.lock().unwrap());
+    //~^ ERROR: swapping with a temporary value is inefficient
+}
diff --git a/src/tools/clippy/tests/ui/swap_with_temporary.stderr b/src/tools/clippy/tests/ui/swap_with_temporary.stderr
index 59355771a96..5ca4fccd37a 100644
--- a/src/tools/clippy/tests/ui/swap_with_temporary.stderr
+++ b/src/tools/clippy/tests/ui/swap_with_temporary.stderr
@@ -96,5 +96,41 @@ note: this expression returns a temporary value
 LL |     swap(mac!(refmut y), &mut func());
    |                               ^^^^^^
 
-error: aborting due to 8 previous errors
+error: swapping with a temporary value is inefficient
+  --> tests/ui/swap_with_temporary.rs:92:13
+   |
+LL |             swap(&mut vec![42], &mut self.thing.lock().unwrap());
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use assignment instead: `*self.thing.lock().unwrap() = vec![42]`
+   |
+note: this expression returns a temporary value
+  --> tests/ui/swap_with_temporary.rs:92:23
+   |
+LL |             swap(&mut vec![42], &mut self.thing.lock().unwrap());
+   |                       ^^^^^^^^
+
+error: swapping with a temporary value is inefficient
+  --> tests/ui/swap_with_temporary.rs:100:5
+   |
+LL |     swap(&mut ***v1, &mut vec![]);
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use assignment instead: `***v1 = vec![]`
+   |
+note: this expression returns a temporary value
+  --> tests/ui/swap_with_temporary.rs:100:27
+   |
+LL |     swap(&mut ***v1, &mut vec![]);
+   |                           ^^^^^^
+
+error: swapping with a temporary value is inefficient
+  --> tests/ui/swap_with_temporary.rs:118:5
+   |
+LL |     swap(&mut vec![], &mut v1.lock().unwrap());
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use assignment instead: `***v1.lock().unwrap() = vec![]`
+   |
+note: this expression returns a temporary value
+  --> tests/ui/swap_with_temporary.rs:118:15
+   |
+LL |     swap(&mut vec![], &mut v1.lock().unwrap());
+   |               ^^^^^^
+
+error: aborting due to 11 previous errors
 
diff --git a/src/tools/clippy/tests/ui/track-diagnostics-clippy.rs b/src/tools/clippy/tests/ui/track-diagnostics-clippy.rs
index 2e67fb65efc..3bae23f1984 100644
--- a/src/tools/clippy/tests/ui/track-diagnostics-clippy.rs
+++ b/src/tools/clippy/tests/ui/track-diagnostics-clippy.rs
@@ -4,6 +4,7 @@
 // Normalize the emitted location so this doesn't need
 // updating everytime someone adds or removes a line.
 //@normalize-stderr-test: ".rs:\d+:\d+" -> ".rs:LL:CC"
+//@normalize-stderr-test: "src/tools/clippy/" -> ""
 
 #![warn(clippy::let_and_return, clippy::unnecessary_cast)]
 
@@ -12,7 +13,7 @@ fn main() {
     let a = 3u32;
     let b = a as u32;
     //~^ unnecessary_cast
-    
+
     // Check the provenance of a lint sent through `TyCtxt::node_span_lint()`
     let c = {
         let d = 42;
diff --git a/src/tools/clippy/tests/ui/track-diagnostics-clippy.stderr b/src/tools/clippy/tests/ui/track-diagnostics-clippy.stderr
index 9d6538112bf..d5533877b45 100644
--- a/src/tools/clippy/tests/ui/track-diagnostics-clippy.stderr
+++ b/src/tools/clippy/tests/ui/track-diagnostics-clippy.stderr
@@ -4,7 +4,7 @@ error: casting to the same type is unnecessary (`u32` -> `u32`)
 LL |     let b = a as u32;
    |             ^^^^^^^^ help: try: `a`
    |
-   = note: -Ztrack-diagnostics: created at src/tools/clippy/clippy_lints/src/casts/unnecessary_cast.rs:LL:CC
+   = note: -Ztrack-diagnostics: created at clippy_lints/src/casts/unnecessary_cast.rs:LL:CC
    = note: `-D clippy::unnecessary-cast` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::unnecessary_cast)]`
 
@@ -16,7 +16,7 @@ LL |         let d = 42;
 LL |         d
    |         ^
    |
-   = note: -Ztrack-diagnostics: created at src/tools/clippy/clippy_lints/src/returns.rs:LL:CC
+   = note: -Ztrack-diagnostics: created at clippy_lints/src/returns.rs:LL:CC
    = note: `-D clippy::let-and-return` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::let_and_return)]`
 help: return the expression directly
diff --git a/src/tools/clippy/tests/ui/trait_duplication_in_bounds.fixed b/src/tools/clippy/tests/ui/trait_duplication_in_bounds.fixed
index cf52ecf2f03..88ba5f810b4 100644
--- a/src/tools/clippy/tests/ui/trait_duplication_in_bounds.fixed
+++ b/src/tools/clippy/tests/ui/trait_duplication_in_bounds.fixed
@@ -167,8 +167,7 @@ where
 }
 
 // #13476
-#[const_trait]
-trait ConstTrait {}
+const trait ConstTrait {}
 const fn const_trait_bounds_good<T: ConstTrait + [const] ConstTrait>() {}
 
 const fn const_trait_bounds_bad<T: [const] ConstTrait>() {}
diff --git a/src/tools/clippy/tests/ui/trait_duplication_in_bounds.rs b/src/tools/clippy/tests/ui/trait_duplication_in_bounds.rs
index 955562f08dc..19a4e70e294 100644
--- a/src/tools/clippy/tests/ui/trait_duplication_in_bounds.rs
+++ b/src/tools/clippy/tests/ui/trait_duplication_in_bounds.rs
@@ -167,8 +167,7 @@ where
 }
 
 // #13476
-#[const_trait]
-trait ConstTrait {}
+const trait ConstTrait {}
 const fn const_trait_bounds_good<T: ConstTrait + [const] ConstTrait>() {}
 
 const fn const_trait_bounds_bad<T: [const] ConstTrait + [const] ConstTrait>() {}
diff --git a/src/tools/clippy/tests/ui/trait_duplication_in_bounds.stderr b/src/tools/clippy/tests/ui/trait_duplication_in_bounds.stderr
index ab31721ef51..a56a683de97 100644
--- a/src/tools/clippy/tests/ui/trait_duplication_in_bounds.stderr
+++ b/src/tools/clippy/tests/ui/trait_duplication_in_bounds.stderr
@@ -59,19 +59,19 @@ LL | fn bad_trait_object(arg0: &(dyn Any + Send + Send)) {
    |                                 ^^^^^^^^^^^^^^^^^ help: try: `Any + Send`
 
 error: these bounds contain repeated elements
-  --> tests/ui/trait_duplication_in_bounds.rs:174:36
+  --> tests/ui/trait_duplication_in_bounds.rs:173:36
    |
 LL | const fn const_trait_bounds_bad<T: [const] ConstTrait + [const] ConstTrait>() {}
    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `[const] ConstTrait`
 
 error: these where clauses contain repeated elements
-  --> tests/ui/trait_duplication_in_bounds.rs:181:8
+  --> tests/ui/trait_duplication_in_bounds.rs:180:8
    |
 LL |     T: IntoIterator<Item = U::Owned> + IntoIterator<Item = U::Owned>,
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `IntoIterator<Item = U::Owned>`
 
 error: these where clauses contain repeated elements
-  --> tests/ui/trait_duplication_in_bounds.rs:203:8
+  --> tests/ui/trait_duplication_in_bounds.rs:202:8
    |
 LL |     T: AssocConstTrait<ASSOC = 0> + AssocConstTrait<ASSOC = 0>,
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `AssocConstTrait<ASSOC = 0>`
diff --git a/src/tools/clippy/tests/ui/unnecessary_map_or.fixed b/src/tools/clippy/tests/ui/unnecessary_map_or.fixed
index 3c724397284..3109c4af8e2 100644
--- a/src/tools/clippy/tests/ui/unnecessary_map_or.fixed
+++ b/src/tools/clippy/tests/ui/unnecessary_map_or.fixed
@@ -130,3 +130,13 @@ fn issue14201(a: Option<String>, b: Option<String>, s: &String) -> bool {
     //~^ unnecessary_map_or
     x && y
 }
+
+fn issue15180() {
+    let s = std::sync::Mutex::new(Some("foo"));
+    _ = s.lock().unwrap().is_some_and(|s| s == "foo");
+    //~^ unnecessary_map_or
+
+    let s = &&&&Some("foo");
+    _ = s.is_some_and(|s| s == "foo");
+    //~^ unnecessary_map_or
+}
diff --git a/src/tools/clippy/tests/ui/unnecessary_map_or.rs b/src/tools/clippy/tests/ui/unnecessary_map_or.rs
index e734a27bada..52a55f9fc9e 100644
--- a/src/tools/clippy/tests/ui/unnecessary_map_or.rs
+++ b/src/tools/clippy/tests/ui/unnecessary_map_or.rs
@@ -134,3 +134,13 @@ fn issue14201(a: Option<String>, b: Option<String>, s: &String) -> bool {
     //~^ unnecessary_map_or
     x && y
 }
+
+fn issue15180() {
+    let s = std::sync::Mutex::new(Some("foo"));
+    _ = s.lock().unwrap().map_or(false, |s| s == "foo");
+    //~^ unnecessary_map_or
+
+    let s = &&&&Some("foo");
+    _ = s.map_or(false, |s| s == "foo");
+    //~^ unnecessary_map_or
+}
diff --git a/src/tools/clippy/tests/ui/unnecessary_map_or.stderr b/src/tools/clippy/tests/ui/unnecessary_map_or.stderr
index 0f9466a6a6b..99e17e8b34b 100644
--- a/src/tools/clippy/tests/ui/unnecessary_map_or.stderr
+++ b/src/tools/clippy/tests/ui/unnecessary_map_or.stderr
@@ -326,5 +326,29 @@ LL -     let y = b.map_or(true, |b| b == *s);
 LL +     let y = b.is_none_or(|b| b == *s);
    |
 
-error: aborting due to 26 previous errors
+error: this `map_or` can be simplified
+  --> tests/ui/unnecessary_map_or.rs:140:9
+   |
+LL |     _ = s.lock().unwrap().map_or(false, |s| s == "foo");
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: use is_some_and instead
+   |
+LL -     _ = s.lock().unwrap().map_or(false, |s| s == "foo");
+LL +     _ = s.lock().unwrap().is_some_and(|s| s == "foo");
+   |
+
+error: this `map_or` can be simplified
+  --> tests/ui/unnecessary_map_or.rs:144:9
+   |
+LL |     _ = s.map_or(false, |s| s == "foo");
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: use is_some_and instead
+   |
+LL -     _ = s.map_or(false, |s| s == "foo");
+LL +     _ = s.is_some_and(|s| s == "foo");
+   |
+
+error: aborting due to 28 previous errors
 
diff --git a/src/tools/clippy/tests/ui/unnecessary_operation.fixed b/src/tools/clippy/tests/ui/unnecessary_operation.fixed
index 645b56fe95e..ac9fa4de20a 100644
--- a/src/tools/clippy/tests/ui/unnecessary_operation.fixed
+++ b/src/tools/clippy/tests/ui/unnecessary_operation.fixed
@@ -144,3 +144,16 @@ const fn foo() {
     assert!([42, 55].len() > get_usize());
     //~^ unnecessary_operation
 }
+
+fn issue15173() {
+    // No lint as `Box::new(None)` alone would be ambiguous
+    Box::new(None) as Box<Option<i32>>;
+}
+
+#[expect(clippy::redundant_closure_call)]
+fn issue15173_original<MsU>(handler: impl FnOnce() -> MsU + Clone + 'static) {
+    Box::new(move |value| {
+        (|_| handler.clone()())(value);
+        None
+    }) as Box<dyn Fn(i32) -> Option<i32>>;
+}
diff --git a/src/tools/clippy/tests/ui/unnecessary_operation.rs b/src/tools/clippy/tests/ui/unnecessary_operation.rs
index 97e90269c5c..a3e6c6288ad 100644
--- a/src/tools/clippy/tests/ui/unnecessary_operation.rs
+++ b/src/tools/clippy/tests/ui/unnecessary_operation.rs
@@ -150,3 +150,16 @@ const fn foo() {
     [42, 55][get_usize()];
     //~^ unnecessary_operation
 }
+
+fn issue15173() {
+    // No lint as `Box::new(None)` alone would be ambiguous
+    Box::new(None) as Box<Option<i32>>;
+}
+
+#[expect(clippy::redundant_closure_call)]
+fn issue15173_original<MsU>(handler: impl FnOnce() -> MsU + Clone + 'static) {
+    Box::new(move |value| {
+        (|_| handler.clone()())(value);
+        None
+    }) as Box<dyn Fn(i32) -> Option<i32>>;
+}
diff --git a/src/tools/clippy/tests/ui/useless_attribute.fixed b/src/tools/clippy/tests/ui/useless_attribute.fixed
index a96c8f46f55..930bc1eaecf 100644
--- a/src/tools/clippy/tests/ui/useless_attribute.fixed
+++ b/src/tools/clippy/tests/ui/useless_attribute.fixed
@@ -13,7 +13,7 @@
 #[allow(unused_imports)]
 #[allow(unused_extern_crates)]
 #[macro_use]
-extern crate rustc_middle;
+extern crate regex as regex_crate;
 
 #[macro_use]
 extern crate proc_macro_derive;
diff --git a/src/tools/clippy/tests/ui/useless_attribute.rs b/src/tools/clippy/tests/ui/useless_attribute.rs
index b26410134bb..50fafd478e5 100644
--- a/src/tools/clippy/tests/ui/useless_attribute.rs
+++ b/src/tools/clippy/tests/ui/useless_attribute.rs
@@ -13,7 +13,7 @@
 #[allow(unused_imports)]
 #[allow(unused_extern_crates)]
 #[macro_use]
-extern crate rustc_middle;
+extern crate regex as regex_crate;
 
 #[macro_use]
 extern crate proc_macro_derive;
diff --git a/src/tools/clippy/tests/ui/zero_ptr.fixed b/src/tools/clippy/tests/ui/zero_ptr.fixed
index f2375d57f3a..f9d9d2db176 100644
--- a/src/tools/clippy/tests/ui/zero_ptr.fixed
+++ b/src/tools/clippy/tests/ui/zero_ptr.fixed
@@ -16,3 +16,11 @@ fn main() {
     let z = 0;
     let _ = z as *const usize; // this is currently not caught
 }
+
+const fn in_const_context() {
+    #[clippy::msrv = "1.23"]
+    let _: *const usize = 0 as *const _;
+    #[clippy::msrv = "1.24"]
+    let _: *const usize = std::ptr::null();
+    //~^ zero_ptr
+}
diff --git a/src/tools/clippy/tests/ui/zero_ptr.rs b/src/tools/clippy/tests/ui/zero_ptr.rs
index ee01e426a43..41455fee5b5 100644
--- a/src/tools/clippy/tests/ui/zero_ptr.rs
+++ b/src/tools/clippy/tests/ui/zero_ptr.rs
@@ -16,3 +16,11 @@ fn main() {
     let z = 0;
     let _ = z as *const usize; // this is currently not caught
 }
+
+const fn in_const_context() {
+    #[clippy::msrv = "1.23"]
+    let _: *const usize = 0 as *const _;
+    #[clippy::msrv = "1.24"]
+    let _: *const usize = 0 as *const _;
+    //~^ zero_ptr
+}
diff --git a/src/tools/clippy/tests/ui/zero_ptr.stderr b/src/tools/clippy/tests/ui/zero_ptr.stderr
index 8dc781f3625..81269de6c60 100644
--- a/src/tools/clippy/tests/ui/zero_ptr.stderr
+++ b/src/tools/clippy/tests/ui/zero_ptr.stderr
@@ -31,5 +31,11 @@ error: `0 as *mut _` detected
 LL |     foo(0 as *const _, 0 as *mut _);
    |                        ^^^^^^^^^^^ help: try: `std::ptr::null_mut()`
 
-error: aborting due to 5 previous errors
+error: `0 as *const _` detected
+  --> tests/ui/zero_ptr.rs:24:27
+   |
+LL |     let _: *const usize = 0 as *const _;
+   |                           ^^^^^^^^^^^^^ help: try: `std::ptr::null()`
+
+error: aborting due to 6 previous errors
 
diff --git a/src/tools/clippy/triagebot.toml b/src/tools/clippy/triagebot.toml
index 4f370758c00..805baf2af6d 100644
--- a/src/tools/clippy/triagebot.toml
+++ b/src/tools/clippy/triagebot.toml
@@ -15,6 +15,8 @@ allow-unauthenticated = [
 
 [close]
 
+[transfer]
+
 [issue-links]
 
 [mentions."clippy_lints/src/doc"]
@@ -43,12 +45,15 @@ reviewed_label = "S-waiting-on-author"
 [autolabel."S-waiting-on-review"]
 new_pr = true
 
+[concern]
+# These labels are set when there are unresolved concerns, removed otherwise
+labels = ["S-waiting-on-concerns"]
+
 [assign]
 contributing_url = "https://github.com/rust-lang/rust-clippy/blob/master/CONTRIBUTING.md"
 users_on_vacation = [
     "matthiaskrgr",
     "Manishearth",
-    "blyxyas",
 ]
 
 [assign.owners]
diff --git a/src/tools/clippy/util/gh-pages/index_template.html b/src/tools/clippy/util/gh-pages/index_template.html
index 865b9523c39..6f380ec8fee 100644
--- a/src/tools/clippy/util/gh-pages/index_template.html
+++ b/src/tools/clippy/util/gh-pages/index_template.html
@@ -149,49 +149,45 @@ Otherwise, have a great day =^.^=
                 <article class="panel panel-default" id="{{lint.id}}"> {# #}
                     <input id="label-{{lint.id}}" type="checkbox"> {# #}
                     <label for="label-{{lint.id}}"> {# #}
-                        <header class="panel-heading"> {# #}
-                            <h2 class="panel-title"> {# #}
-                                <div class="panel-title-name" id="lint-{{lint.id}}"> {# #}
-                                    <span>{{lint.id}}</span> {#+ #}
-                                    <a href="#{{lint.id}}" class="lint-anchor anchor label label-default">&para;</a> {#+ #}
-                                    <a href="" class="copy-to-clipboard anchor label label-default"> {# #}
-                                        &#128203; {# #}
-                                    </a> {# #}
-                                </div> {# #}
+                        <h2 class="lint-title"> {# #}
+                            <div class="panel-title-name" id="lint-{{lint.id}}"> {# #}
+                                {{lint.id +}}
+                                <a href="#{{lint.id}}" class="anchor label label-default">&para;</a> {#+ #}
+                                <a href="" class="copy-to-clipboard anchor label label-default"> {# #}
+                                    &#128203; {# #}
+                                </a> {# #}
+                            </div> {# #}
 
-                                <div class="panel-title-addons"> {# #}
-                                    <span class="label label-lint-group label-default label-group-{{lint.group}}">{{lint.group}}</span> {#+ #}
+                            <span class="label label-lint-group label-default label-group-{{lint.group}}">{{lint.group}}</span> {#+ #}
 
-                                    <span class="label label-lint-level label-lint-level-{{lint.level}}">{{lint.level}}</span> {#+ #}
+                            <span class="label label-lint-level label-lint-level-{{lint.level}}">{{lint.level}}</span> {#+ #}
 
-                                    <span class="label label-doc-folding"></span> {# #}
-                                </div> {# #}
-                            </h2> {# #}
-                        </header> {# #}
+                            <span class="label label-doc-folding"></span> {# #}
+                        </h2> {# #}
                     </label> {# #}
 
                     <div class="list-group lint-docs"> {# #}
                         <div class="list-group-item lint-doc-md">{{Self::markdown(lint.docs)}}</div> {# #}
                         <div class="lint-additional-info-container">
                             {# Applicability #}
-                            <div class="lint-additional-info-item"> {# #}
-                                <span> Applicability: </span> {# #}
+                            <div> {# #}
+                                Applicability: {#+ #}
                                 <span class="label label-default label-applicability">{{ lint.applicability_str() }}</span> {# #}
                                 <a href="https://doc.rust-lang.org/nightly/nightly-rustc/rustc_lint_defs/enum.Applicability.html#variants">(?)</a> {# #}
                             </div>
                             {# Clippy version #}
-                            <div class="lint-additional-info-item"> {# #}
-                                <span>{% if lint.group == "deprecated" %}Deprecated{% else %} Added{% endif +%} in: </span> {# #}
+                            <div> {# #}
+                                {% if lint.group == "deprecated" %}Deprecated{% else %} Added{% endif +%} in: {#+ #}
                                 <span class="label label-default label-version">{{lint.version}}</span> {# #}
                             </div>
                             {# Open related issues #}
-                            <div class="lint-additional-info-item"> {# #}
+                            <div> {# #}
                                 <a href="https://github.com/rust-lang/rust-clippy/issues?q=is%3Aissue+{{lint.id}}">Related Issues</a> {# #}
                             </div>
 
                             {# Jump to source #}
                             {% if let Some(id_location) = lint.id_location %}
-                                <div class="lint-additional-info-item"> {# #}
+                                <div> {# #}
                                     <a href="https://github.com/rust-lang/rust-clippy/blob/master/{{id_location}}">View Source</a> {# #}
                                 </div>
                             {% endif %}
diff --git a/src/tools/clippy/util/gh-pages/script.js b/src/tools/clippy/util/gh-pages/script.js
index 285aa34e701..ee13f1c0cd8 100644
--- a/src/tools/clippy/util/gh-pages/script.js
+++ b/src/tools/clippy/util/gh-pages/script.js
@@ -554,10 +554,10 @@ function addListeners() {
             return;
         }
 
-        if (event.target.classList.contains("lint-anchor")) {
-            lintAnchor(event);
-        } else if (event.target.classList.contains("copy-to-clipboard")) {
+        if (event.target.classList.contains("copy-to-clipboard")) {
             copyToClipboard(event);
+        } else if (event.target.classList.contains("anchor")) {
+            lintAnchor(event);
         }
     });
 
diff --git a/src/tools/clippy/util/gh-pages/style.css b/src/tools/clippy/util/gh-pages/style.css
index 3cc7a919c23..022ea875200 100644
--- a/src/tools/clippy/util/gh-pages/style.css
+++ b/src/tools/clippy/util/gh-pages/style.css
@@ -50,11 +50,25 @@ div.panel div.panel-body  button.open {
 
 .panel-heading { cursor: pointer; }
 
-.panel-title { display: flex; flex-wrap: wrap;}
-.panel-title .label { display: inline-block; }
+.lint-title {
+    cursor: pointer;
+    margin-top: 0;
+    margin-bottom: 0;
+    font-size: 16px;
+    display: flex;
+    flex-wrap: wrap;
+    background: var(--theme-hover);
+    color: var(--fg);
+    border: 1px solid var(--theme-popup-border);
+    padding: 10px 15px;
+    border-top-left-radius: 3px;
+    border-top-right-radius: 3px;
+    gap: 4px;
+}
+
+.lint-title .label { display: inline-block; }
 
 .panel-title-name { flex: 1; min-width: 400px;}
-.panel-title-name span { vertical-align: bottom; }
 
 .panel .panel-title-name .anchor { display: none; }
 .panel:hover .panel-title-name .anchor { display: inline;}
@@ -147,7 +161,7 @@ div.panel div.panel-body  button.open {
         display: flex;
         flex-flow: column;
     }
-    .lint-additional-info-item + .lint-additional-info-item {
+    .lint-additional-info-container > div + div {
         border-top: 1px solid var(--theme-popup-border);
     }
 }
@@ -156,12 +170,12 @@ div.panel div.panel-body  button.open {
         display: flex;
         flex-flow: row;
     }
-    .lint-additional-info-item + .lint-additional-info-item {
+    .lint-additional-info-container > div + div {
         border-left: 1px solid var(--theme-popup-border);
     }
 }
 
-.lint-additional-info-item {
+.lint-additional-info-container > div {
     display: inline-flex;
     min-width: 200px;
     flex-grow: 1;
diff --git a/src/tools/compiletest/src/common.rs b/src/tools/compiletest/src/common.rs
index 7122746fa87..aceae3e3a3b 100644
--- a/src/tools/compiletest/src/common.rs
+++ b/src/tools/compiletest/src/common.rs
@@ -1,63 +1,20 @@
 use std::collections::{BTreeSet, HashMap, HashSet};
+use std::iter;
 use std::process::Command;
-use std::str::FromStr;
 use std::sync::OnceLock;
-use std::{fmt, iter};
 
 use build_helper::git::GitConfig;
 use camino::{Utf8Path, Utf8PathBuf};
 use semver::Version;
 use serde::de::{Deserialize, Deserializer, Error as _};
 
-pub use self::Mode::*;
 use crate::executor::{ColorConfig, OutputFormat};
 use crate::fatal;
-use crate::util::{Utf8PathBufExt, add_dylib_path};
-
-macro_rules! string_enum {
-    ($(#[$meta:meta])* $vis:vis enum $name:ident { $($variant:ident => $repr:expr,)* }) => {
-        $(#[$meta])*
-        $vis enum $name {
-            $($variant,)*
-        }
-
-        impl $name {
-            $vis const VARIANTS: &'static [Self] = &[$(Self::$variant,)*];
-            $vis const STR_VARIANTS: &'static [&'static str] = &[$(Self::$variant.to_str(),)*];
-
-            $vis const fn to_str(&self) -> &'static str {
-                match self {
-                    $(Self::$variant => $repr,)*
-                }
-            }
-        }
-
-        impl fmt::Display for $name {
-            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-                fmt::Display::fmt(self.to_str(), f)
-            }
-        }
-
-        impl FromStr for $name {
-            type Err = String;
-
-            fn from_str(s: &str) -> Result<Self, Self::Err> {
-                match s {
-                    $($repr => Ok(Self::$variant),)*
-                    _ => Err(format!(concat!("unknown `", stringify!($name), "` variant: `{}`"), s)),
-                }
-            }
-        }
-    }
-}
-
-// Make the macro visible outside of this module, for tests.
-#[cfg(test)]
-pub(crate) use string_enum;
+use crate::util::{Utf8PathBufExt, add_dylib_path, string_enum};
 
 string_enum! {
     #[derive(Clone, Copy, PartialEq, Debug)]
-    pub enum Mode {
+    pub enum TestMode {
         Pretty => "pretty",
         DebugInfo => "debuginfo",
         Codegen => "codegen",
@@ -76,18 +33,12 @@ string_enum! {
     }
 }
 
-impl Default for Mode {
-    fn default() -> Self {
-        Mode::Ui
-    }
-}
-
-impl Mode {
+impl TestMode {
     pub fn aux_dir_disambiguator(self) -> &'static str {
         // Pretty-printing tests could run concurrently, and if they do,
         // they need to keep their output segregated.
         match self {
-            Pretty => ".pretty",
+            TestMode::Pretty => ".pretty",
             _ => "",
         }
     }
@@ -96,12 +47,38 @@ impl Mode {
         // Coverage tests use the same test files for multiple test modes,
         // so each mode should have a separate output directory.
         match self {
-            CoverageMap | CoverageRun => self.to_str(),
+            TestMode::CoverageMap | TestMode::CoverageRun => self.to_str(),
             _ => "",
         }
     }
 }
 
+// Note that coverage tests use the same test files for multiple test modes.
+string_enum! {
+    #[derive(Clone, Copy, PartialEq, Debug)]
+    pub enum TestSuite {
+        AssemblyLlvm => "assembly-llvm",
+        CodegenLlvm => "codegen-llvm",
+        CodegenUnits => "codegen-units",
+        Coverage => "coverage",
+        CoverageRunRustdoc => "coverage-run-rustdoc",
+        Crashes => "crashes",
+        Debuginfo => "debuginfo",
+        Incremental => "incremental",
+        MirOpt => "mir-opt",
+        Pretty => "pretty",
+        RunMake => "run-make",
+        Rustdoc => "rustdoc",
+        RustdocGui => "rustdoc-gui",
+        RustdocJs => "rustdoc-js",
+        RustdocJsStd=> "rustdoc-js-std",
+        RustdocJson => "rustdoc-json",
+        RustdocUi => "rustdoc-ui",
+        Ui => "ui",
+        UiFullDeps => "ui-fulldeps",
+    }
+}
+
 string_enum! {
     #[derive(Clone, Copy, PartialEq, Debug, Hash)]
     pub enum PassMode {
@@ -111,11 +88,37 @@ string_enum! {
     }
 }
 
+string_enum! {
+    #[derive(Clone, Copy, PartialEq, Debug, Hash)]
+    pub enum RunResult {
+        Pass => "run-pass",
+        Fail => "run-fail",
+        Crash => "run-crash",
+    }
+}
+
+#[derive(Copy, Clone, Debug, PartialEq, PartialOrd)]
+pub enum RunFailMode {
+    /// Running the program must make it exit with a regular failure exit code
+    /// in the range `1..=127`. If the program is terminated by e.g. a signal
+    /// the test will fail.
+    Fail,
+    /// Running the program must result in a crash, e.g. by `SIGABRT` or
+    /// `SIGSEGV` on Unix or on Windows by having an appropriate NTSTATUS high
+    /// bit in the exit code.
+    Crash,
+    /// Running the program must either fail or crash. Useful for e.g. sanitizer
+    /// tests since some sanitizer implementations exit the process with code 1
+    /// to in the face of memory errors while others abort (crash) the process
+    /// in the face of memory errors.
+    FailOrCrash,
+}
+
 #[derive(Copy, Clone, Debug, PartialEq, PartialOrd)]
 pub enum FailMode {
     Check,
     Build,
-    Run,
+    Run(RunFailMode),
 }
 
 string_enum! {
@@ -172,6 +175,36 @@ pub enum Sanitizer {
     Hwaddress,
 }
 
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum CodegenBackend {
+    Cranelift,
+    Gcc,
+    Llvm,
+}
+
+impl<'a> TryFrom<&'a str> for CodegenBackend {
+    type Error = &'static str;
+
+    fn try_from(value: &'a str) -> Result<Self, Self::Error> {
+        match value.to_lowercase().as_str() {
+            "cranelift" => Ok(Self::Cranelift),
+            "gcc" => Ok(Self::Gcc),
+            "llvm" => Ok(Self::Llvm),
+            _ => Err("unknown backend"),
+        }
+    }
+}
+
+impl CodegenBackend {
+    pub fn as_str(self) -> &'static str {
+        match self {
+            Self::Cranelift => "cranelift",
+            Self::Gcc => "gcc",
+            Self::Llvm => "llvm",
+        }
+    }
+}
+
 /// Configuration for `compiletest` *per invocation*.
 ///
 /// In terms of `bootstrap`, this means that `./x test tests/ui tests/run-make` actually correspond
@@ -193,9 +226,9 @@ pub enum Sanitizer {
 ///
 /// FIXME: audit these options to make sure we are not hashing less than necessary for build stamp
 /// (for changed test detection).
-#[derive(Debug, Default, Clone)]
+#[derive(Debug, Clone)]
 pub struct Config {
-    /// Some test [`Mode`]s support [snapshot testing], where a *reference snapshot* of outputs (of
+    /// Some [`TestMode`]s support [snapshot testing], where a *reference snapshot* of outputs (of
     /// `stdout`, `stderr`, or other form of artifacts) can be compared to the *actual output*.
     ///
     /// This option can be set to `true` to update the *reference snapshots* in-place, otherwise
@@ -317,23 +350,21 @@ pub struct Config {
     /// FIXME: reconsider this string; this is hashed for test build stamp.
     pub stage_id: String,
 
-    /// The test [`Mode`]. E.g. [`Mode::Ui`]. Each test mode can correspond to one or more test
+    /// The [`TestMode`]. E.g. [`TestMode::Ui`]. Each test mode can correspond to one or more test
     /// suites.
     ///
     /// FIXME: stop using stringly-typed test suites!
-    pub mode: Mode,
+    pub mode: TestMode,
 
     /// The test suite.
     ///
-    /// Example: `tests/ui/` is the "UI" test *suite*, which happens to also be of the [`Mode::Ui`]
-    /// test *mode*.
+    /// Example: `tests/ui/` is [`TestSuite::Ui`] test *suite*, which happens to also be of the
+    /// [`TestMode::Ui`] test *mode*.
     ///
-    /// Note that the same test directory (e.g. `tests/coverage/`) may correspond to multiple test
-    /// modes, e.g. `tests/coverage/` can be run under both [`Mode::CoverageRun`] and
-    /// [`Mode::CoverageMap`].
-    ///
-    /// FIXME: stop using stringly-typed test suites!
-    pub suite: String,
+    /// Note that the same test suite (e.g. `tests/coverage/`) may correspond to multiple test
+    /// modes, e.g. `tests/coverage/` can be run under both [`TestMode::CoverageRun`] and
+    /// [`TestMode::CoverageMap`].
+    pub suite: TestSuite,
 
     /// When specified, **only** the specified [`Debugger`] will be used to run against the
     /// `tests/debuginfo` test suite. When unspecified, `compiletest` will attempt to find all three
@@ -650,9 +681,115 @@ pub struct Config {
     /// need `core` stubs in cross-compilation scenarios that do not otherwise want/need to
     /// `-Zbuild-std`. Used in e.g. ABI tests.
     pub minicore_path: Utf8PathBuf,
+
+    /// Current codegen backend used.
+    pub codegen_backend: CodegenBackend,
 }
 
 impl Config {
+    /// Incomplete config intended for `src/tools/rustdoc-gui-test` **only** as
+    /// `src/tools/rustdoc-gui-test` wants to reuse `compiletest`'s directive -> test property
+    /// handling for `//@ {compile,run}-flags`, do not use for any other purpose.
+    ///
+    /// FIXME(#143827): this setup feels very hacky. It so happens that `tests/rustdoc-gui/`
+    /// **only** uses `//@ {compile,run}-flags` for now and not any directives that actually rely on
+    /// info that is assumed available in a fully populated [`Config`].
+    pub fn incomplete_for_rustdoc_gui_test() -> Config {
+        // FIXME(#143827): spelling this out intentionally, because this is questionable.
+        //
+        // For instance, `//@ ignore-stage1` will not work at all.
+        Config {
+            mode: TestMode::Rustdoc,
+            // E.g. this has no sensible default tbh.
+            suite: TestSuite::Ui,
+
+            // Dummy values.
+            edition: Default::default(),
+            bless: Default::default(),
+            fail_fast: Default::default(),
+            compile_lib_path: Utf8PathBuf::default(),
+            run_lib_path: Utf8PathBuf::default(),
+            rustc_path: Utf8PathBuf::default(),
+            cargo_path: Default::default(),
+            stage0_rustc_path: Default::default(),
+            rustdoc_path: Default::default(),
+            coverage_dump_path: Default::default(),
+            python: Default::default(),
+            jsondocck_path: Default::default(),
+            jsondoclint_path: Default::default(),
+            llvm_filecheck: Default::default(),
+            llvm_bin_dir: Default::default(),
+            run_clang_based_tests_with: Default::default(),
+            src_root: Utf8PathBuf::default(),
+            src_test_suite_root: Utf8PathBuf::default(),
+            build_root: Utf8PathBuf::default(),
+            build_test_suite_root: Utf8PathBuf::default(),
+            sysroot_base: Utf8PathBuf::default(),
+            stage: Default::default(),
+            stage_id: String::default(),
+            debugger: Default::default(),
+            run_ignored: Default::default(),
+            with_rustc_debug_assertions: Default::default(),
+            with_std_debug_assertions: Default::default(),
+            filters: Default::default(),
+            skip: Default::default(),
+            filter_exact: Default::default(),
+            force_pass_mode: Default::default(),
+            run: Default::default(),
+            runner: Default::default(),
+            host_rustcflags: Default::default(),
+            target_rustcflags: Default::default(),
+            rust_randomized_layout: Default::default(),
+            optimize_tests: Default::default(),
+            target: Default::default(),
+            host: Default::default(),
+            cdb: Default::default(),
+            cdb_version: Default::default(),
+            gdb: Default::default(),
+            gdb_version: Default::default(),
+            lldb_version: Default::default(),
+            llvm_version: Default::default(),
+            system_llvm: Default::default(),
+            android_cross_path: Default::default(),
+            adb_path: Default::default(),
+            adb_test_dir: Default::default(),
+            adb_device_status: Default::default(),
+            lldb_python_dir: Default::default(),
+            verbose: Default::default(),
+            format: Default::default(),
+            color: Default::default(),
+            remote_test_client: Default::default(),
+            compare_mode: Default::default(),
+            rustfix_coverage: Default::default(),
+            has_html_tidy: Default::default(),
+            has_enzyme: Default::default(),
+            channel: Default::default(),
+            git_hash: Default::default(),
+            cc: Default::default(),
+            cxx: Default::default(),
+            cflags: Default::default(),
+            cxxflags: Default::default(),
+            ar: Default::default(),
+            target_linker: Default::default(),
+            host_linker: Default::default(),
+            llvm_components: Default::default(),
+            nodejs: Default::default(),
+            npm: Default::default(),
+            force_rerun: Default::default(),
+            only_modified: Default::default(),
+            target_cfgs: Default::default(),
+            builtin_cfg_names: Default::default(),
+            supported_crate_types: Default::default(),
+            nocapture: Default::default(),
+            nightly_branch: Default::default(),
+            git_merge_commit_email: Default::default(),
+            profiler_runtime: Default::default(),
+            diff_command: Default::default(),
+            minicore_path: Default::default(),
+            codegen_backend: CodegenBackend::Llvm,
+        }
+    }
+
     /// FIXME: this run scheme is... confusing.
     pub fn run_enabled(&self) -> bool {
         self.run.unwrap_or_else(|| {
diff --git a/src/tools/compiletest/src/debuggers.rs b/src/tools/compiletest/src/debuggers.rs
index 0edc3d82d4f..8afe3289fa4 100644
--- a/src/tools/compiletest/src/debuggers.rs
+++ b/src/tools/compiletest/src/debuggers.rs
@@ -51,17 +51,6 @@ pub(crate) fn configure_gdb(config: &Config) -> Option<Arc<Config>> {
 pub(crate) fn configure_lldb(config: &Config) -> Option<Arc<Config>> {
     config.lldb_python_dir.as_ref()?;
 
-    // FIXME: this is super old
-    if let Some(350) = config.lldb_version {
-        println!(
-            "WARNING: The used version of LLDB (350) has a \
-             known issue that breaks debuginfo tests. See \
-             issue #32520 for more information. Skipping all \
-             LLDB-based tests!",
-        );
-        return None;
-    }
-
     Some(Arc::new(Config { debugger: Some(Debugger::Lldb), ..config.clone() }))
 }
 
diff --git a/src/tools/compiletest/src/directive-list.rs b/src/tools/compiletest/src/directive-list.rs
deleted file mode 100644
index adf2a7bffef..00000000000
--- a/src/tools/compiletest/src/directive-list.rs
+++ /dev/null
@@ -1,260 +0,0 @@
-/// This was originally generated by collecting directives from ui tests and then extracting their
-/// directive names. This is **not** an exhaustive list of all possible directives. Instead, this is
-/// a best-effort approximation for diagnostics. Add new directives to this list when needed.
-const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
-    // tidy-alphabetical-start
-    "add-core-stubs",
-    "assembly-output",
-    "aux-bin",
-    "aux-build",
-    "aux-codegen-backend",
-    "aux-crate",
-    "build-aux-docs",
-    "build-fail",
-    "build-pass",
-    "check-fail",
-    "check-pass",
-    "check-run-results",
-    "check-stdout",
-    "check-test-line-numbers-match",
-    "compile-flags",
-    "doc-flags",
-    "dont-check-compiler-stderr",
-    "dont-check-compiler-stdout",
-    "dont-check-failure-status",
-    "dont-require-annotations",
-    "edition",
-    "error-pattern",
-    "exact-llvm-major-version",
-    "exec-env",
-    "failure-status",
-    "filecheck-flags",
-    "forbid-output",
-    "force-host",
-    "ignore-16bit",
-    "ignore-32bit",
-    "ignore-64bit",
-    "ignore-aarch64",
-    "ignore-aarch64-pc-windows-msvc",
-    "ignore-aarch64-unknown-linux-gnu",
-    "ignore-aix",
-    "ignore-android",
-    "ignore-apple",
-    "ignore-arm",
-    "ignore-arm-unknown-linux-gnueabi",
-    "ignore-arm-unknown-linux-gnueabihf",
-    "ignore-arm-unknown-linux-musleabi",
-    "ignore-arm-unknown-linux-musleabihf",
-    "ignore-auxiliary",
-    "ignore-avr",
-    "ignore-beta",
-    "ignore-cdb",
-    "ignore-compare-mode-next-solver",
-    "ignore-compare-mode-polonius",
-    "ignore-coverage-map",
-    "ignore-coverage-run",
-    "ignore-cross-compile",
-    "ignore-eabi",
-    "ignore-elf",
-    "ignore-emscripten",
-    "ignore-endian-big",
-    "ignore-enzyme",
-    "ignore-freebsd",
-    "ignore-fuchsia",
-    "ignore-gdb",
-    "ignore-gdb-version",
-    "ignore-gnu",
-    "ignore-haiku",
-    "ignore-horizon",
-    "ignore-i686-pc-windows-gnu",
-    "ignore-i686-pc-windows-msvc",
-    "ignore-illumos",
-    "ignore-ios",
-    "ignore-linux",
-    "ignore-lldb",
-    "ignore-llvm-version",
-    "ignore-loongarch32",
-    "ignore-loongarch64",
-    "ignore-macabi",
-    "ignore-macos",
-    "ignore-msp430",
-    "ignore-msvc",
-    "ignore-musl",
-    "ignore-netbsd",
-    "ignore-nightly",
-    "ignore-none",
-    "ignore-nto",
-    "ignore-nvptx64",
-    "ignore-nvptx64-nvidia-cuda",
-    "ignore-openbsd",
-    "ignore-pass",
-    "ignore-powerpc",
-    "ignore-remote",
-    "ignore-riscv64",
-    "ignore-rustc-debug-assertions",
-    "ignore-rustc_abi-x86-sse2",
-    "ignore-s390x",
-    "ignore-sgx",
-    "ignore-sparc64",
-    "ignore-spirv",
-    "ignore-stable",
-    "ignore-stage1",
-    "ignore-stage2",
-    "ignore-std-debug-assertions",
-    "ignore-test",
-    "ignore-thumb",
-    "ignore-thumbv8m.base-none-eabi",
-    "ignore-thumbv8m.main-none-eabi",
-    "ignore-tvos",
-    "ignore-unix",
-    "ignore-unknown",
-    "ignore-uwp",
-    "ignore-visionos",
-    "ignore-vxworks",
-    "ignore-wasi",
-    "ignore-wasm",
-    "ignore-wasm32",
-    "ignore-wasm32-bare",
-    "ignore-wasm64",
-    "ignore-watchos",
-    "ignore-windows",
-    "ignore-windows-gnu",
-    "ignore-windows-msvc",
-    "ignore-x32",
-    "ignore-x86",
-    "ignore-x86_64",
-    "ignore-x86_64-apple-darwin",
-    "ignore-x86_64-pc-windows-gnu",
-    "ignore-x86_64-unknown-linux-gnu",
-    "incremental",
-    "known-bug",
-    "llvm-cov-flags",
-    "max-llvm-major-version",
-    "min-cdb-version",
-    "min-gdb-version",
-    "min-lldb-version",
-    "min-llvm-version",
-    "min-system-llvm-version",
-    "needs-asm-support",
-    "needs-crate-type",
-    "needs-deterministic-layouts",
-    "needs-dlltool",
-    "needs-dynamic-linking",
-    "needs-enzyme",
-    "needs-force-clang-based-tests",
-    "needs-git-hash",
-    "needs-llvm-components",
-    "needs-llvm-zstd",
-    "needs-profiler-runtime",
-    "needs-relocation-model-pic",
-    "needs-run-enabled",
-    "needs-rust-lld",
-    "needs-rustc-debug-assertions",
-    "needs-sanitizer-address",
-    "needs-sanitizer-cfi",
-    "needs-sanitizer-dataflow",
-    "needs-sanitizer-hwaddress",
-    "needs-sanitizer-kcfi",
-    "needs-sanitizer-leak",
-    "needs-sanitizer-memory",
-    "needs-sanitizer-memtag",
-    "needs-sanitizer-safestack",
-    "needs-sanitizer-shadow-call-stack",
-    "needs-sanitizer-support",
-    "needs-sanitizer-thread",
-    "needs-std-debug-assertions",
-    "needs-subprocess",
-    "needs-symlink",
-    "needs-target-has-atomic",
-    "needs-target-std",
-    "needs-threads",
-    "needs-unwind",
-    "needs-wasmtime",
-    "needs-xray",
-    "no-auto-check-cfg",
-    "no-prefer-dynamic",
-    "normalize-stderr",
-    "normalize-stderr-32bit",
-    "normalize-stderr-64bit",
-    "normalize-stdout",
-    "only-16bit",
-    "only-32bit",
-    "only-64bit",
-    "only-aarch64",
-    "only-aarch64-apple-darwin",
-    "only-aarch64-unknown-linux-gnu",
-    "only-apple",
-    "only-arm",
-    "only-avr",
-    "only-beta",
-    "only-bpf",
-    "only-cdb",
-    "only-dist",
-    "only-elf",
-    "only-emscripten",
-    "only-gnu",
-    "only-i686-pc-windows-gnu",
-    "only-i686-pc-windows-msvc",
-    "only-i686-unknown-linux-gnu",
-    "only-ios",
-    "only-linux",
-    "only-loongarch32",
-    "only-loongarch64",
-    "only-loongarch64-unknown-linux-gnu",
-    "only-macos",
-    "only-mips",
-    "only-mips64",
-    "only-msp430",
-    "only-msvc",
-    "only-nightly",
-    "only-nvptx64",
-    "only-powerpc",
-    "only-riscv64",
-    "only-rustc_abi-x86-sse2",
-    "only-s390x",
-    "only-sparc",
-    "only-sparc64",
-    "only-stable",
-    "only-thumb",
-    "only-tvos",
-    "only-unix",
-    "only-visionos",
-    "only-wasm32",
-    "only-wasm32-bare",
-    "only-wasm32-wasip1",
-    "only-watchos",
-    "only-windows",
-    "only-windows-gnu",
-    "only-windows-msvc",
-    "only-x86",
-    "only-x86_64",
-    "only-x86_64-apple-darwin",
-    "only-x86_64-fortanix-unknown-sgx",
-    "only-x86_64-pc-windows-gnu",
-    "only-x86_64-pc-windows-msvc",
-    "only-x86_64-unknown-linux-gnu",
-    "pp-exact",
-    "pretty-compare-only",
-    "pretty-mode",
-    "proc-macro",
-    "reference",
-    "regex-error-pattern",
-    "remap-src-base",
-    "revisions",
-    "run-fail",
-    "run-flags",
-    "run-pass",
-    "run-rustfix",
-    "rustc-env",
-    "rustfix-only-machine-applicable",
-    "should-fail",
-    "should-ice",
-    "stderr-per-bitwidth",
-    "test-mir-pass",
-    "unique-doc-out-dir",
-    "unset-exec-env",
-    "unset-rustc-env",
-    // Used by the tidy check `unknown_revision`.
-    "unused-revision-names",
-    // tidy-alphabetical-end
-];
diff --git a/src/tools/compiletest/src/directives.rs b/src/tools/compiletest/src/directives.rs
index a6242cf0c22..1397c87ab07 100644
--- a/src/tools/compiletest/src/directives.rs
+++ b/src/tools/compiletest/src/directives.rs
@@ -9,7 +9,7 @@ use camino::{Utf8Path, Utf8PathBuf};
 use semver::Version;
 use tracing::*;
 
-use crate::common::{Config, Debugger, FailMode, Mode, PassMode};
+use crate::common::{CodegenBackend, Config, Debugger, FailMode, PassMode, RunFailMode, TestMode};
 use crate::debuggers::{extract_cdb_version, extract_gdb_version};
 use crate::directives::auxiliary::{AuxProps, parse_and_update_aux};
 use crate::directives::needs::CachedNeedsConditions;
@@ -56,7 +56,6 @@ impl EarlyProps {
         let mut poisoned = false;
         iter_directives(
             config.mode,
-            &config.suite,
             &mut poisoned,
             testfile,
             rdr,
@@ -328,7 +327,7 @@ impl TestProps {
         props.exec_env.push(("RUSTC".to_string(), config.rustc_path.to_string()));
 
         match (props.pass_mode, props.fail_mode) {
-            (None, None) if config.mode == Mode::Ui => props.fail_mode = Some(FailMode::Check),
+            (None, None) if config.mode == TestMode::Ui => props.fail_mode = Some(FailMode::Check),
             (Some(_), Some(_)) => panic!("cannot use a *-fail and *-pass mode together"),
             _ => {}
         }
@@ -349,7 +348,6 @@ impl TestProps {
 
             iter_directives(
                 config.mode,
-                &config.suite,
                 &mut poisoned,
                 testfile,
                 file,
@@ -609,11 +607,11 @@ impl TestProps {
             self.failure_status = Some(101);
         }
 
-        if config.mode == Mode::Incremental {
+        if config.mode == TestMode::Incremental {
             self.incremental = true;
         }
 
-        if config.mode == Mode::Crashes {
+        if config.mode == TestMode::Crashes {
             // we don't want to pollute anything with backtrace-files
             // also turn off backtraces in order to save some execution
             // time on the tests; we only need to know IF it crashes
@@ -641,11 +639,11 @@ impl TestProps {
     fn update_fail_mode(&mut self, ln: &str, config: &Config) {
         let check_ui = |mode: &str| {
             // Mode::Crashes may need build-fail in order to trigger llvm errors or stack overflows
-            if config.mode != Mode::Ui && config.mode != Mode::Crashes {
+            if config.mode != TestMode::Ui && config.mode != TestMode::Crashes {
                 panic!("`{}-fail` directive is only supported in UI tests", mode);
             }
         };
-        if config.mode == Mode::Ui && config.parse_name_directive(ln, "compile-fail") {
+        if config.mode == TestMode::Ui && config.parse_name_directive(ln, "compile-fail") {
             panic!("`compile-fail` directive is useless in UI tests");
         }
         let fail_mode = if config.parse_name_directive(ln, "check-fail") {
@@ -656,7 +654,13 @@ impl TestProps {
             Some(FailMode::Build)
         } else if config.parse_name_directive(ln, "run-fail") {
             check_ui("run");
-            Some(FailMode::Run)
+            Some(FailMode::Run(RunFailMode::Fail))
+        } else if config.parse_name_directive(ln, "run-crash") {
+            check_ui("run");
+            Some(FailMode::Run(RunFailMode::Crash))
+        } else if config.parse_name_directive(ln, "run-fail-or-crash") {
+            check_ui("run");
+            Some(FailMode::Run(RunFailMode::FailOrCrash))
         } else {
             None
         };
@@ -669,10 +673,10 @@ impl TestProps {
 
     fn update_pass_mode(&mut self, ln: &str, revision: Option<&str>, config: &Config) {
         let check_no_run = |s| match (config.mode, s) {
-            (Mode::Ui, _) => (),
-            (Mode::Crashes, _) => (),
-            (Mode::Codegen, "build-pass") => (),
-            (Mode::Incremental, _) => {
+            (TestMode::Ui, _) => (),
+            (TestMode::Crashes, _) => (),
+            (TestMode::Codegen, "build-pass") => (),
+            (TestMode::Incremental, _) => {
                 if revision.is_some() && !self.revisions.iter().all(|r| r.starts_with("cfail")) {
                     panic!("`{s}` directive is only supported in `cfail` incremental tests")
                 }
@@ -715,7 +719,7 @@ impl TestProps {
     pub fn update_add_core_stubs(&mut self, ln: &str, config: &Config) {
         let add_core_stubs = config.parse_name_directive(ln, directives::ADD_CORE_STUBS);
         if add_core_stubs {
-            if !matches!(config.mode, Mode::Ui | Mode::Codegen | Mode::Assembly) {
+            if !matches!(config.mode, TestMode::Ui | TestMode::Codegen | TestMode::Assembly) {
                 panic!(
                     "`add-core-stubs` is currently only supported for ui, codegen and assembly test modes"
                 );
@@ -765,11 +769,271 @@ fn line_directive<'line>(
     Some(DirectiveLine { line_number, revision, raw_directive })
 }
 
-// To prevent duplicating the list of directives between `compiletest`,`htmldocck` and `jsondocck`,
-// we put it into a common file which is included in rust code and parsed here.
-// FIXME: This setup is temporary until we figure out how to improve this situation.
-//        See <https://github.com/rust-lang/rust/issues/125813#issuecomment-2141953780>.
-include!("directive-list.rs");
+/// This was originally generated by collecting directives from ui tests and then extracting their
+/// directive names. This is **not** an exhaustive list of all possible directives. Instead, this is
+/// a best-effort approximation for diagnostics. Add new directives to this list when needed.
+const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
+    // tidy-alphabetical-start
+    "add-core-stubs",
+    "assembly-output",
+    "aux-bin",
+    "aux-build",
+    "aux-codegen-backend",
+    "aux-crate",
+    "build-aux-docs",
+    "build-fail",
+    "build-pass",
+    "check-fail",
+    "check-pass",
+    "check-run-results",
+    "check-stdout",
+    "check-test-line-numbers-match",
+    "compile-flags",
+    "doc-flags",
+    "dont-check-compiler-stderr",
+    "dont-check-compiler-stdout",
+    "dont-check-failure-status",
+    "dont-require-annotations",
+    "edition",
+    "error-pattern",
+    "exact-llvm-major-version",
+    "exec-env",
+    "failure-status",
+    "filecheck-flags",
+    "forbid-output",
+    "force-host",
+    "ignore-16bit",
+    "ignore-32bit",
+    "ignore-64bit",
+    "ignore-aarch64",
+    "ignore-aarch64-pc-windows-msvc",
+    "ignore-aarch64-unknown-linux-gnu",
+    "ignore-aix",
+    "ignore-android",
+    "ignore-apple",
+    "ignore-arm",
+    "ignore-arm-unknown-linux-gnueabi",
+    "ignore-arm-unknown-linux-gnueabihf",
+    "ignore-arm-unknown-linux-musleabi",
+    "ignore-arm-unknown-linux-musleabihf",
+    "ignore-auxiliary",
+    "ignore-avr",
+    "ignore-backends",
+    "ignore-beta",
+    "ignore-cdb",
+    "ignore-compare-mode-next-solver",
+    "ignore-compare-mode-polonius",
+    "ignore-coverage-map",
+    "ignore-coverage-run",
+    "ignore-cross-compile",
+    "ignore-eabi",
+    "ignore-elf",
+    "ignore-emscripten",
+    "ignore-endian-big",
+    "ignore-enzyme",
+    "ignore-freebsd",
+    "ignore-fuchsia",
+    "ignore-gdb",
+    "ignore-gdb-version",
+    "ignore-gnu",
+    "ignore-haiku",
+    "ignore-horizon",
+    "ignore-i686-pc-windows-gnu",
+    "ignore-i686-pc-windows-msvc",
+    "ignore-illumos",
+    "ignore-ios",
+    "ignore-linux",
+    "ignore-lldb",
+    "ignore-llvm-version",
+    "ignore-loongarch32",
+    "ignore-loongarch64",
+    "ignore-macabi",
+    "ignore-macos",
+    "ignore-msp430",
+    "ignore-msvc",
+    "ignore-musl",
+    "ignore-netbsd",
+    "ignore-nightly",
+    "ignore-none",
+    "ignore-nto",
+    "ignore-nvptx64",
+    "ignore-nvptx64-nvidia-cuda",
+    "ignore-openbsd",
+    "ignore-pass",
+    "ignore-powerpc",
+    "ignore-remote",
+    "ignore-riscv64",
+    "ignore-rustc-debug-assertions",
+    "ignore-rustc_abi-x86-sse2",
+    "ignore-s390x",
+    "ignore-sgx",
+    "ignore-sparc64",
+    "ignore-spirv",
+    "ignore-stable",
+    "ignore-stage1",
+    "ignore-stage2",
+    "ignore-std-debug-assertions",
+    "ignore-test",
+    "ignore-thumb",
+    "ignore-thumbv8m.base-none-eabi",
+    "ignore-thumbv8m.main-none-eabi",
+    "ignore-tvos",
+    "ignore-unix",
+    "ignore-unknown",
+    "ignore-uwp",
+    "ignore-visionos",
+    "ignore-vxworks",
+    "ignore-wasi",
+    "ignore-wasm",
+    "ignore-wasm32",
+    "ignore-wasm32-bare",
+    "ignore-wasm64",
+    "ignore-watchos",
+    "ignore-windows",
+    "ignore-windows-gnu",
+    "ignore-windows-msvc",
+    "ignore-x32",
+    "ignore-x86",
+    "ignore-x86_64",
+    "ignore-x86_64-apple-darwin",
+    "ignore-x86_64-pc-windows-gnu",
+    "ignore-x86_64-unknown-linux-gnu",
+    "incremental",
+    "known-bug",
+    "llvm-cov-flags",
+    "max-llvm-major-version",
+    "min-cdb-version",
+    "min-gdb-version",
+    "min-lldb-version",
+    "min-llvm-version",
+    "min-system-llvm-version",
+    "needs-asm-support",
+    "needs-backends",
+    "needs-crate-type",
+    "needs-deterministic-layouts",
+    "needs-dlltool",
+    "needs-dynamic-linking",
+    "needs-enzyme",
+    "needs-force-clang-based-tests",
+    "needs-git-hash",
+    "needs-llvm-components",
+    "needs-llvm-zstd",
+    "needs-profiler-runtime",
+    "needs-relocation-model-pic",
+    "needs-run-enabled",
+    "needs-rust-lld",
+    "needs-rustc-debug-assertions",
+    "needs-sanitizer-address",
+    "needs-sanitizer-cfi",
+    "needs-sanitizer-dataflow",
+    "needs-sanitizer-hwaddress",
+    "needs-sanitizer-kcfi",
+    "needs-sanitizer-leak",
+    "needs-sanitizer-memory",
+    "needs-sanitizer-memtag",
+    "needs-sanitizer-safestack",
+    "needs-sanitizer-shadow-call-stack",
+    "needs-sanitizer-support",
+    "needs-sanitizer-thread",
+    "needs-std-debug-assertions",
+    "needs-subprocess",
+    "needs-symlink",
+    "needs-target-has-atomic",
+    "needs-target-std",
+    "needs-threads",
+    "needs-unwind",
+    "needs-wasmtime",
+    "needs-xray",
+    "no-auto-check-cfg",
+    "no-prefer-dynamic",
+    "normalize-stderr",
+    "normalize-stderr-32bit",
+    "normalize-stderr-64bit",
+    "normalize-stdout",
+    "only-16bit",
+    "only-32bit",
+    "only-64bit",
+    "only-aarch64",
+    "only-aarch64-apple-darwin",
+    "only-aarch64-unknown-linux-gnu",
+    "only-apple",
+    "only-arm",
+    "only-avr",
+    "only-beta",
+    "only-bpf",
+    "only-cdb",
+    "only-dist",
+    "only-elf",
+    "only-emscripten",
+    "only-gnu",
+    "only-i686-pc-windows-gnu",
+    "only-i686-pc-windows-msvc",
+    "only-i686-unknown-linux-gnu",
+    "only-ios",
+    "only-linux",
+    "only-loongarch32",
+    "only-loongarch64",
+    "only-loongarch64-unknown-linux-gnu",
+    "only-macos",
+    "only-mips",
+    "only-mips64",
+    "only-msp430",
+    "only-msvc",
+    "only-musl",
+    "only-nightly",
+    "only-nvptx64",
+    "only-powerpc",
+    "only-riscv64",
+    "only-rustc_abi-x86-sse2",
+    "only-s390x",
+    "only-sparc",
+    "only-sparc64",
+    "only-stable",
+    "only-thumb",
+    "only-tvos",
+    "only-unix",
+    "only-visionos",
+    "only-wasm32",
+    "only-wasm32-bare",
+    "only-wasm32-wasip1",
+    "only-watchos",
+    "only-windows",
+    "only-windows-gnu",
+    "only-windows-msvc",
+    "only-x86",
+    "only-x86_64",
+    "only-x86_64-apple-darwin",
+    "only-x86_64-fortanix-unknown-sgx",
+    "only-x86_64-pc-windows-gnu",
+    "only-x86_64-pc-windows-msvc",
+    "only-x86_64-unknown-linux-gnu",
+    "pp-exact",
+    "pretty-compare-only",
+    "pretty-mode",
+    "proc-macro",
+    "reference",
+    "regex-error-pattern",
+    "remap-src-base",
+    "revisions",
+    "run-crash",
+    "run-fail",
+    "run-fail-or-crash",
+    "run-flags",
+    "run-pass",
+    "run-rustfix",
+    "rustc-env",
+    "rustfix-only-machine-applicable",
+    "should-fail",
+    "should-ice",
+    "stderr-per-bitwidth",
+    "test-mir-pass",
+    "unique-doc-out-dir",
+    "unset-exec-env",
+    "unset-rustc-env",
+    // Used by the tidy check `unknown_revision`.
+    "unused-revision-names",
+    // tidy-alphabetical-end
+];
 
 const KNOWN_HTMLDOCCK_DIRECTIVE_NAMES: &[&str] = &[
     "count",
@@ -833,43 +1097,33 @@ pub(crate) struct CheckDirectiveResult<'ln> {
 
 pub(crate) fn check_directive<'a>(
     directive_ln: &'a str,
-    mode: Mode,
-    original_line: &str,
+    mode: TestMode,
 ) -> CheckDirectiveResult<'a> {
     let (directive_name, post) = directive_ln.split_once([':', ' ']).unwrap_or((directive_ln, ""));
 
+    let is_known_directive = KNOWN_DIRECTIVE_NAMES.contains(&directive_name)
+        || match mode {
+            TestMode::Rustdoc => KNOWN_HTMLDOCCK_DIRECTIVE_NAMES.contains(&directive_name),
+            TestMode::RustdocJson => KNOWN_JSONDOCCK_DIRECTIVE_NAMES.contains(&directive_name),
+            _ => false,
+        };
+
     let trailing = post.trim().split_once(' ').map(|(pre, _)| pre).unwrap_or(post);
-    let is_known = |s: &str| {
-        KNOWN_DIRECTIVE_NAMES.contains(&s)
-            || match mode {
-                Mode::Rustdoc | Mode::RustdocJson => {
-                    original_line.starts_with("//@")
-                        && match mode {
-                            Mode::Rustdoc => KNOWN_HTMLDOCCK_DIRECTIVE_NAMES,
-                            Mode::RustdocJson => KNOWN_JSONDOCCK_DIRECTIVE_NAMES,
-                            _ => unreachable!(),
-                        }
-                        .contains(&s)
-                }
-                _ => false,
-            }
-    };
     let trailing_directive = {
         // 1. is the directive name followed by a space? (to exclude `:`)
-        matches!(directive_ln.get(directive_name.len()..), Some(s) if s.starts_with(' '))
+        directive_ln.get(directive_name.len()..).is_some_and(|s| s.starts_with(' '))
             // 2. is what is after that directive also a directive (ex: "only-x86 only-arm")
-            && is_known(trailing)
+            && KNOWN_DIRECTIVE_NAMES.contains(&trailing)
     }
     .then_some(trailing);
 
-    CheckDirectiveResult { is_known_directive: is_known(&directive_name), trailing_directive }
+    CheckDirectiveResult { is_known_directive, trailing_directive }
 }
 
 const COMPILETEST_DIRECTIVE_PREFIX: &str = "//@";
 
 fn iter_directives(
-    mode: Mode,
-    _suite: &str,
+    mode: TestMode,
     poisoned: &mut bool,
     testfile: &Utf8Path,
     rdr: impl Read,
@@ -883,7 +1137,7 @@ fn iter_directives(
     // specify them manually in every test file.
     //
     // FIXME(jieyouxu): I feel like there's a better way to do this, leaving for later.
-    if mode == Mode::CoverageRun {
+    if mode == TestMode::CoverageRun {
         let extra_directives: &[&str] = &[
             "needs-profiler-runtime",
             // FIXME(pietroalbini): this test currently does not work on cross-compiled targets
@@ -914,9 +1168,9 @@ fn iter_directives(
         };
 
         // Perform unknown directive check on Rust files.
-        if testfile.extension().map(|e| e == "rs").unwrap_or(false) {
+        if testfile.extension() == Some("rs") {
             let CheckDirectiveResult { is_known_directive, trailing_directive } =
-                check_directive(directive_line.raw_directive, mode, ln);
+                check_directive(directive_line.raw_directive, mode);
 
             if !is_known_directive {
                 *poisoned = true;
@@ -936,7 +1190,7 @@ fn iter_directives(
                     "{testfile}:{line_number}: detected trailing compiletest test directive `{}`",
                     trailing_directive,
                 );
-                help!("put the trailing directive in it's own line: `//@ {}`", trailing_directive);
+                help!("put the trailing directive in its own line: `//@ {}`", trailing_directive);
 
                 return;
             }
@@ -964,7 +1218,7 @@ impl Config {
             ["CHECK", "COM", "NEXT", "SAME", "EMPTY", "NOT", "COUNT", "DAG", "LABEL"];
 
         if let Some(raw) = self.parse_name_value_directive(line, "revisions") {
-            if self.mode == Mode::RunMake {
+            if self.mode == TestMode::RunMake {
                 panic!("`run-make` tests do not support revisions: {}", testfile);
             }
 
@@ -981,7 +1235,7 @@ impl Config {
                     );
                 }
 
-                if matches!(self.mode, Mode::Assembly | Mode::Codegen | Mode::MirOpt)
+                if matches!(self.mode, TestMode::Assembly | TestMode::Codegen | TestMode::MirOpt)
                     && FILECHECK_FORBIDDEN_REVISION_NAMES.contains(&revision)
                 {
                     panic!(
@@ -1388,7 +1642,6 @@ pub(crate) fn make_test_description<R: Read>(
     // Scan through the test file to handle `ignore-*`, `only-*`, and `needs-*` directives.
     iter_directives(
         config.mode,
-        &config.suite,
         &mut local_poisoned,
         path,
         src,
@@ -1418,6 +1671,8 @@ pub(crate) fn make_test_description<R: Read>(
             decision!(cfg::handle_only(config, ln));
             decision!(needs::handle_needs(&cache.needs, config, ln));
             decision!(ignore_llvm(config, path, ln));
+            decision!(ignore_backends(config, path, ln));
+            decision!(needs_backends(config, path, ln));
             decision!(ignore_cdb(config, ln));
             decision!(ignore_gdb(config, ln));
             decision!(ignore_lldb(config, ln));
@@ -1443,7 +1698,7 @@ pub(crate) fn make_test_description<R: Read>(
     // since we run the pretty printer across all tests by default.
     // If desired, we could add a `should-fail-pretty` annotation.
     let should_panic = match config.mode {
-        crate::common::Pretty => ShouldPanic::No,
+        TestMode::Pretty => ShouldPanic::No,
         _ if should_fail => ShouldPanic::Yes,
         _ => ShouldPanic::No,
     };
@@ -1544,6 +1799,49 @@ fn ignore_lldb(config: &Config, line: &str) -> IgnoreDecision {
     IgnoreDecision::Continue
 }
 
+fn ignore_backends(config: &Config, path: &Utf8Path, line: &str) -> IgnoreDecision {
+    if let Some(backends_to_ignore) = config.parse_name_value_directive(line, "ignore-backends") {
+        for backend in backends_to_ignore.split_whitespace().map(|backend| {
+            match CodegenBackend::try_from(backend) {
+                Ok(backend) => backend,
+                Err(error) => {
+                    panic!("Invalid ignore-backends value `{backend}` in `{path}`: {error}")
+                }
+            }
+        }) {
+            if config.codegen_backend == backend {
+                return IgnoreDecision::Ignore {
+                    reason: format!("{} backend is marked as ignore", backend.as_str()),
+                };
+            }
+        }
+    }
+    IgnoreDecision::Continue
+}
+
+fn needs_backends(config: &Config, path: &Utf8Path, line: &str) -> IgnoreDecision {
+    if let Some(needed_backends) = config.parse_name_value_directive(line, "needs-backends") {
+        if !needed_backends
+            .split_whitespace()
+            .map(|backend| match CodegenBackend::try_from(backend) {
+                Ok(backend) => backend,
+                Err(error) => {
+                    panic!("Invalid needs-backends value `{backend}` in `{path}`: {error}")
+                }
+            })
+            .any(|backend| config.codegen_backend == backend)
+        {
+            return IgnoreDecision::Ignore {
+                reason: format!(
+                    "{} backend is not part of required backends",
+                    config.codegen_backend.as_str()
+                ),
+            };
+        }
+    }
+    IgnoreDecision::Continue
+}
+
 fn ignore_llvm(config: &Config, path: &Utf8Path, line: &str) -> IgnoreDecision {
     if let Some(needed_components) =
         config.parse_name_value_directive(line, "needs-llvm-components")
diff --git a/src/tools/compiletest/src/directives/tests.rs b/src/tools/compiletest/src/directives/tests.rs
index d4570f82677..5682cc57b6f 100644
--- a/src/tools/compiletest/src/directives/tests.rs
+++ b/src/tools/compiletest/src/directives/tests.rs
@@ -7,7 +7,7 @@ use super::{
     DirectivesCache, EarlyProps, extract_llvm_version, extract_version_range, iter_directives,
     parse_normalize_rule,
 };
-use crate::common::{Config, Debugger, Mode};
+use crate::common::{Config, Debugger, TestMode};
 use crate::executor::{CollectedTestDesc, ShouldPanic};
 
 fn make_test_description<R: Read>(
@@ -785,7 +785,7 @@ fn threads_support() {
 
 fn run_path(poisoned: &mut bool, path: &Utf8Path, buf: &[u8]) {
     let rdr = std::io::Cursor::new(&buf);
-    iter_directives(Mode::Ui, "ui", poisoned, path, rdr, &mut |_| {});
+    iter_directives(TestMode::Ui, poisoned, path, rdr, &mut |_| {});
 }
 
 #[test]
diff --git a/src/tools/compiletest/src/lib.rs b/src/tools/compiletest/src/lib.rs
index 9819079e284..c712185733c 100644
--- a/src/tools/compiletest/src/lib.rs
+++ b/src/tools/compiletest/src/lib.rs
@@ -31,7 +31,7 @@ use std::time::SystemTime;
 use std::{env, fs, vec};
 
 use build_helper::git::{get_git_modified_files, get_git_untracked_files};
-use camino::{Utf8Path, Utf8PathBuf};
+use camino::{Utf8Component, Utf8Path, Utf8PathBuf};
 use getopts::Options;
 use rayon::iter::{ParallelBridge, ParallelIterator};
 use tracing::debug;
@@ -39,8 +39,8 @@ use walkdir::WalkDir;
 
 use self::directives::{EarlyProps, make_test_description};
 use crate::common::{
-    CompareMode, Config, Debugger, Mode, PassMode, TestPaths, UI_EXTENSIONS, expected_output_path,
-    output_base_dir, output_relative_path,
+    CodegenBackend, CompareMode, Config, Debugger, PassMode, TestMode, TestPaths, UI_EXTENSIONS,
+    expected_output_path, output_base_dir, output_relative_path,
 };
 use crate::directives::DirectivesCache;
 use crate::executor::{CollectedTest, ColorConfig, OutputFormat};
@@ -203,6 +203,12 @@ pub fn parse_config(args: Vec<String>) -> Config {
             "debugger",
             "only test a specific debugger in debuginfo tests",
             "gdb | lldb | cdb",
+        )
+        .optopt(
+            "",
+            "codegen-backend",
+            "the codegen backend currently used",
+            "CODEGEN BACKEND NAME",
         );
 
     let (argv0, args_) = args.split_first().unwrap();
@@ -264,11 +270,20 @@ pub fn parse_config(args: Vec<String>) -> Config {
             || directives::extract_llvm_version_from_binary(&matches.opt_str("llvm-filecheck")?),
         );
 
+    let codegen_backend = match matches.opt_str("codegen-backend").as_deref() {
+        Some(backend) => match CodegenBackend::try_from(backend) {
+            Ok(backend) => backend,
+            Err(error) => panic!("invalid value `{backend}` for `--codegen-backend`: {error}"),
+        },
+        // By default, it's always llvm.
+        None => CodegenBackend::Llvm,
+    };
+
     let run_ignored = matches.opt_present("ignored");
     let with_rustc_debug_assertions = matches.opt_present("with-rustc-debug-assertions");
     let with_std_debug_assertions = matches.opt_present("with-std-debug-assertions");
     let mode = matches.opt_str("mode").unwrap().parse().expect("invalid mode");
-    let has_html_tidy = if mode == Mode::Rustdoc {
+    let has_html_tidy = if mode == TestMode::Rustdoc {
         Command::new("tidy")
             .arg("--version")
             .stdout(Stdio::null())
@@ -279,7 +294,7 @@ pub fn parse_config(args: Vec<String>) -> Config {
         false
     };
     let has_enzyme = matches.opt_present("has-enzyme");
-    let filters = if mode == Mode::RunMake {
+    let filters = if mode == TestMode::RunMake {
         matches
             .free
             .iter()
@@ -360,7 +375,7 @@ pub fn parse_config(args: Vec<String>) -> Config {
         stage_id: matches.opt_str("stage-id").unwrap(),
 
         mode,
-        suite: matches.opt_str("suite").unwrap(),
+        suite: matches.opt_str("suite").unwrap().parse().expect("invalid suite"),
         debugger: matches.opt_str("debugger").map(|debugger| {
             debugger
                 .parse::<Debugger>()
@@ -449,6 +464,8 @@ pub fn parse_config(args: Vec<String>) -> Config {
         diff_command: matches.opt_str("compiletest-diff-tool"),
 
         minicore_path: opt_path(matches, "minicore-path"),
+
+        codegen_backend,
     }
 }
 
@@ -545,7 +562,7 @@ pub fn run_tests(config: Arc<Config>) {
     unsafe { env::set_var("TARGET", &config.target) };
 
     let mut configs = Vec::new();
-    if let Mode::DebugInfo = config.mode {
+    if let TestMode::DebugInfo = config.mode {
         // Debugging emscripten code doesn't make sense today
         if !config.target.contains("emscripten") {
             match config.debugger {
@@ -782,8 +799,25 @@ fn collect_tests_from_dir(
         return Ok(TestCollector::new());
     }
 
+    let mut components = dir.components().rev();
+    if let Some(Utf8Component::Normal(last)) = components.next()
+        && let Some(("assembly" | "codegen", backend)) = last.split_once('-')
+        && let Some(Utf8Component::Normal(parent)) = components.next()
+        && parent == "tests"
+        && let Ok(backend) = CodegenBackend::try_from(backend)
+        && backend != cx.config.codegen_backend
+    {
+        // We ignore asm tests which don't match the current codegen backend.
+        warning!(
+            "Ignoring tests in `{dir}` because they don't match the configured codegen \
+             backend (`{}`)",
+            cx.config.codegen_backend.as_str(),
+        );
+        return Ok(TestCollector::new());
+    }
+
     // For run-make tests, a "test file" is actually a directory that contains an `rmake.rs`.
-    if cx.config.mode == Mode::RunMake {
+    if cx.config.mode == TestMode::RunMake {
         let mut collector = TestCollector::new();
         if dir.join("rmake.rs").exists() {
             let paths = TestPaths {
@@ -869,7 +903,7 @@ fn make_test(cx: &TestCollectorCx, collector: &mut TestCollector, testpaths: &Te
     // For run-make tests, each "test file" is actually a _directory_ containing an `rmake.rs`. But
     // for the purposes of directive parsing, we want to look at that recipe file, not the directory
     // itself.
-    let test_path = if cx.config.mode == Mode::RunMake {
+    let test_path = if cx.config.mode == TestMode::RunMake {
         testpaths.file.join("rmake.rs")
     } else {
         testpaths.file.clone()
@@ -884,7 +918,7 @@ fn make_test(cx: &TestCollectorCx, collector: &mut TestCollector, testpaths: &Te
     // - Incremental tests inherently can't run their revisions in parallel, so
     //   we treat them like non-revisioned tests here. Incremental revisions are
     //   handled internally by `runtest::run` instead.
-    let revisions = if early_props.revisions.is_empty() || cx.config.mode == Mode::Incremental {
+    let revisions = if early_props.revisions.is_empty() || cx.config.mode == TestMode::Incremental {
         vec![None]
     } else {
         early_props.revisions.iter().map(|r| Some(r.as_str())).collect()
@@ -1116,11 +1150,11 @@ fn check_for_overlapping_test_paths(found_path_stems: &HashSet<Utf8PathBuf>) {
 }
 
 pub fn early_config_check(config: &Config) {
-    if !config.has_html_tidy && config.mode == Mode::Rustdoc {
+    if !config.has_html_tidy && config.mode == TestMode::Rustdoc {
         warning!("`tidy` (html-tidy.org) is not installed; diffs will not be generated");
     }
 
-    if !config.profiler_runtime && config.mode == Mode::CoverageRun {
+    if !config.profiler_runtime && config.mode == TestMode::CoverageRun {
         let actioned = if config.bless { "blessed" } else { "checked" };
         warning!("profiler runtime is not available, so `.coverage` files won't be {actioned}");
         help!("try setting `profiler = true` in the `[build]` section of `bootstrap.toml`");
diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index 3e879e0e4bb..f66d4f98f1f 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -16,11 +16,10 @@ use regex::{Captures, Regex};
 use tracing::*;
 
 use crate::common::{
-    Assembly, Codegen, CodegenUnits, CompareMode, Config, CoverageMap, CoverageRun, Crashes,
-    DebugInfo, Debugger, FailMode, Incremental, MirOpt, PassMode, Pretty, RunMake, Rustdoc,
-    RustdocJs, RustdocJson, TestPaths, UI_EXTENSIONS, UI_FIXED, UI_RUN_STDERR, UI_RUN_STDOUT,
-    UI_STDERR, UI_STDOUT, UI_SVG, UI_WINDOWS_SVG, Ui, expected_output_path, incremental_dir,
-    output_base_dir, output_base_name, output_testname_unique,
+    CompareMode, Config, Debugger, FailMode, PassMode, RunFailMode, RunResult, TestMode, TestPaths,
+    TestSuite, UI_EXTENSIONS, UI_FIXED, UI_RUN_STDERR, UI_RUN_STDOUT, UI_STDERR, UI_STDOUT, UI_SVG,
+    UI_WINDOWS_SVG, expected_output_path, incremental_dir, output_base_dir, output_base_name,
+    output_testname_unique,
 };
 use crate::compute_diff::{DiffLine, make_diff, write_diff, write_filtered_diff};
 use crate::directives::TestProps;
@@ -154,7 +153,7 @@ pub fn run(config: Arc<Config>, testpaths: &TestPaths, revision: Option<&str>) {
         cx.init_incremental_test();
     }
 
-    if config.mode == Incremental {
+    if config.mode == TestMode::Incremental {
         // Incremental tests are special because they cannot be run in
         // parallel.
         assert!(!props.revisions.is_empty(), "Incremental tests require revisions.");
@@ -203,7 +202,7 @@ pub fn compute_stamp_hash(config: &Config) -> String {
         None => {}
     }
 
-    if let Ui = config.mode {
+    if config.mode == TestMode::Ui {
         config.force_pass_mode.hash(&mut hash);
     }
 
@@ -251,25 +250,28 @@ impl<'test> TestCx<'test> {
     /// Code executed for each revision in turn (or, if there are no
     /// revisions, exactly once, with revision == None).
     fn run_revision(&self) {
-        if self.props.should_ice && self.config.mode != Incremental && self.config.mode != Crashes {
+        if self.props.should_ice
+            && self.config.mode != TestMode::Incremental
+            && self.config.mode != TestMode::Crashes
+        {
             self.fatal("cannot use should-ice in a test that is not cfail");
         }
         match self.config.mode {
-            Pretty => self.run_pretty_test(),
-            DebugInfo => self.run_debuginfo_test(),
-            Codegen => self.run_codegen_test(),
-            Rustdoc => self.run_rustdoc_test(),
-            RustdocJson => self.run_rustdoc_json_test(),
-            CodegenUnits => self.run_codegen_units_test(),
-            Incremental => self.run_incremental_test(),
-            RunMake => self.run_rmake_test(),
-            Ui => self.run_ui_test(),
-            MirOpt => self.run_mir_opt_test(),
-            Assembly => self.run_assembly_test(),
-            RustdocJs => self.run_rustdoc_js_test(),
-            CoverageMap => self.run_coverage_map_test(), // see self::coverage
-            CoverageRun => self.run_coverage_run_test(), // see self::coverage
-            Crashes => self.run_crash_test(),
+            TestMode::Pretty => self.run_pretty_test(),
+            TestMode::DebugInfo => self.run_debuginfo_test(),
+            TestMode::Codegen => self.run_codegen_test(),
+            TestMode::Rustdoc => self.run_rustdoc_test(),
+            TestMode::RustdocJson => self.run_rustdoc_json_test(),
+            TestMode::CodegenUnits => self.run_codegen_units_test(),
+            TestMode::Incremental => self.run_incremental_test(),
+            TestMode::RunMake => self.run_rmake_test(),
+            TestMode::Ui => self.run_ui_test(),
+            TestMode::MirOpt => self.run_mir_opt_test(),
+            TestMode::Assembly => self.run_assembly_test(),
+            TestMode::RustdocJs => self.run_rustdoc_js_test(),
+            TestMode::CoverageMap => self.run_coverage_map_test(), // see self::coverage
+            TestMode::CoverageRun => self.run_coverage_run_test(), // see self::coverage
+            TestMode::Crashes => self.run_crash_test(),
         }
     }
 
@@ -279,9 +281,14 @@ impl<'test> TestCx<'test> {
 
     fn should_run(&self, pm: Option<PassMode>) -> WillExecute {
         let test_should_run = match self.config.mode {
-            Ui if pm == Some(PassMode::Run) || self.props.fail_mode == Some(FailMode::Run) => true,
-            MirOpt if pm == Some(PassMode::Run) => true,
-            Ui | MirOpt => false,
+            TestMode::Ui
+                if pm == Some(PassMode::Run)
+                    || matches!(self.props.fail_mode, Some(FailMode::Run(_))) =>
+            {
+                true
+            }
+            TestMode::MirOpt if pm == Some(PassMode::Run) => true,
+            TestMode::Ui | TestMode::MirOpt => false,
             mode => panic!("unimplemented for mode {:?}", mode),
         };
         if test_should_run { self.run_if_enabled() } else { WillExecute::No }
@@ -293,17 +300,17 @@ impl<'test> TestCx<'test> {
 
     fn should_run_successfully(&self, pm: Option<PassMode>) -> bool {
         match self.config.mode {
-            Ui | MirOpt => pm == Some(PassMode::Run),
+            TestMode::Ui | TestMode::MirOpt => pm == Some(PassMode::Run),
             mode => panic!("unimplemented for mode {:?}", mode),
         }
     }
 
     fn should_compile_successfully(&self, pm: Option<PassMode>) -> bool {
         match self.config.mode {
-            RustdocJs => true,
-            Ui => pm.is_some() || self.props.fail_mode > Some(FailMode::Build),
-            Crashes => false,
-            Incremental => {
+            TestMode::RustdocJs => true,
+            TestMode::Ui => pm.is_some() || self.props.fail_mode > Some(FailMode::Build),
+            TestMode::Crashes => false,
+            TestMode::Incremental => {
                 let revision =
                     self.revision.expect("incremental tests require a list of revisions");
                 if revision.starts_with("cpass")
@@ -349,7 +356,7 @@ impl<'test> TestCx<'test> {
             if proc_res.status.success() {
                 {
                     self.error(&format!("{} test did not emit an error", self.config.mode));
-                    if self.config.mode == crate::common::Mode::Ui {
+                    if self.config.mode == crate::common::TestMode::Ui {
                         println!("note: by default, ui tests are expected not to compile");
                     }
                     proc_res.fatal(None, || ());
@@ -892,7 +899,9 @@ impl<'test> TestCx<'test> {
 
     fn should_emit_metadata(&self, pm: Option<PassMode>) -> Emit {
         match (pm, self.props.fail_mode, self.config.mode) {
-            (Some(PassMode::Check), ..) | (_, Some(FailMode::Check), Ui) => Emit::Metadata,
+            (Some(PassMode::Check), ..) | (_, Some(FailMode::Check), TestMode::Ui) => {
+                Emit::Metadata
+            }
             _ => Emit::None,
         }
     }
@@ -926,7 +935,7 @@ impl<'test> TestCx<'test> {
         };
 
         let allow_unused = match self.config.mode {
-            Ui => {
+            TestMode::Ui => {
                 // UI tests tend to have tons of unused code as
                 // it's just testing various pieces of the compile, but we don't
                 // want to actually assert warnings about all this code. Instead
@@ -1021,7 +1030,7 @@ impl<'test> TestCx<'test> {
             .args(&self.props.compile_flags)
             .args(&self.props.doc_flags);
 
-        if self.config.mode == RustdocJson {
+        if self.config.mode == TestMode::RustdocJson {
             rustdoc.arg("--output-format").arg("json").arg("-Zunstable-options");
         }
 
@@ -1372,7 +1381,7 @@ impl<'test> TestCx<'test> {
             || self.is_vxworks_pure_static()
             || self.config.target.contains("bpf")
             || !self.config.target_cfg().dynamic_linking
-            || matches!(self.config.mode, CoverageMap | CoverageRun)
+            || matches!(self.config.mode, TestMode::CoverageMap | TestMode::CoverageRun)
         {
             // We primarily compile all auxiliary libraries as dynamic libraries
             // to avoid code size bloat and large binaries as much as possible
@@ -1486,7 +1495,10 @@ impl<'test> TestCx<'test> {
     }
 
     fn is_rustdoc(&self) -> bool {
-        matches!(self.config.suite.as_str(), "rustdoc-ui" | "rustdoc-js" | "rustdoc-json")
+        matches!(
+            self.config.suite,
+            TestSuite::RustdocUi | TestSuite::RustdocJs | TestSuite::RustdocJson
+        )
     }
 
     fn make_compile_args(
@@ -1562,14 +1574,14 @@ impl<'test> TestCx<'test> {
                 rustc.args(&["-Z", "incremental-verify-ich"]);
             }
 
-            if self.config.mode == CodegenUnits {
+            if self.config.mode == TestMode::CodegenUnits {
                 rustc.args(&["-Z", "human_readable_cgu_names"]);
             }
         }
 
         if self.config.optimize_tests && !is_rustdoc {
             match self.config.mode {
-                Ui => {
+                TestMode::Ui => {
                     // If optimize-tests is true we still only want to optimize tests that actually get
                     // executed and that don't specify their own optimization levels.
                     // Note: aux libs don't have a pass-mode, so they won't get optimized
@@ -1585,8 +1597,8 @@ impl<'test> TestCx<'test> {
                         rustc.arg("-O");
                     }
                 }
-                DebugInfo => { /* debuginfo tests must be unoptimized */ }
-                CoverageMap | CoverageRun => {
+                TestMode::DebugInfo => { /* debuginfo tests must be unoptimized */ }
+                TestMode::CoverageMap | TestMode::CoverageRun => {
                     // Coverage mappings and coverage reports are affected by
                     // optimization level, so they ignore the optimize-tests
                     // setting and set an optimization level in their mode's
@@ -1607,7 +1619,7 @@ impl<'test> TestCx<'test> {
         };
 
         match self.config.mode {
-            Incremental => {
+            TestMode::Incremental => {
                 // If we are extracting and matching errors in the new
                 // fashion, then you want JSON mode. Old-skool error
                 // patterns still match the raw compiler output.
@@ -1620,7 +1632,7 @@ impl<'test> TestCx<'test> {
                 rustc.arg("-Zui-testing");
                 rustc.arg("-Zdeduplicate-diagnostics=no");
             }
-            Ui => {
+            TestMode::Ui => {
                 if !self.props.compile_flags.iter().any(|s| s.starts_with("--error-format")) {
                     rustc.args(&["--error-format", "json"]);
                     rustc.args(&["--json", "future-incompat"]);
@@ -1633,7 +1645,7 @@ impl<'test> TestCx<'test> {
                 // FIXME: use this for other modes too, for perf?
                 rustc.arg("-Cstrip=debuginfo");
             }
-            MirOpt => {
+            TestMode::MirOpt => {
                 // We check passes under test to minimize the mir-opt test dump
                 // if files_for_miropt_test parses the passes, we dump only those passes
                 // otherwise we conservatively pass -Zdump-mir=all
@@ -1663,7 +1675,7 @@ impl<'test> TestCx<'test> {
 
                 set_mir_dump_dir(&mut rustc);
             }
-            CoverageMap => {
+            TestMode::CoverageMap => {
                 rustc.arg("-Cinstrument-coverage");
                 // These tests only compile to LLVM IR, so they don't need the
                 // profiler runtime to be present.
@@ -1673,23 +1685,28 @@ impl<'test> TestCx<'test> {
                 // by `compile-flags`.
                 rustc.arg("-Copt-level=2");
             }
-            CoverageRun => {
+            TestMode::CoverageRun => {
                 rustc.arg("-Cinstrument-coverage");
                 // Coverage reports are sometimes sensitive to optimizations,
                 // and the current snapshots assume `opt-level=2` unless
                 // overridden by `compile-flags`.
                 rustc.arg("-Copt-level=2");
             }
-            Assembly | Codegen => {
+            TestMode::Assembly | TestMode::Codegen => {
                 rustc.arg("-Cdebug-assertions=no");
             }
-            Crashes => {
+            TestMode::Crashes => {
                 set_mir_dump_dir(&mut rustc);
             }
-            CodegenUnits => {
+            TestMode::CodegenUnits => {
                 rustc.arg("-Zprint-mono-items");
             }
-            Pretty | DebugInfo | Rustdoc | RustdocJson | RunMake | RustdocJs => {
+            TestMode::Pretty
+            | TestMode::DebugInfo
+            | TestMode::Rustdoc
+            | TestMode::RustdocJson
+            | TestMode::RunMake
+            | TestMode::RustdocJs => {
                 // do not use JSON output
             }
         }
@@ -1777,6 +1794,12 @@ impl<'test> TestCx<'test> {
         // Allow tests to use internal features.
         rustc.args(&["-A", "internal_features"]);
 
+        // Allow tests to have unused parens and braces.
+        // Add #![deny(unused_parens, unused_braces)] to the test file if you want to
+        // test that these lints are working.
+        rustc.args(&["-A", "unused_parens"]);
+        rustc.args(&["-A", "unused_braces"]);
+
         if self.props.force_host {
             self.maybe_add_external_args(&mut rustc, &self.config.host_rustcflags);
             if !is_rustdoc {
@@ -1956,7 +1979,7 @@ impl<'test> TestCx<'test> {
     /// The revision, ignored for incremental compilation since it wants all revisions in
     /// the same directory.
     fn safe_revision(&self) -> Option<&str> {
-        if self.config.mode == Incremental { None } else { self.revision }
+        if self.config.mode == TestMode::Incremental { None } else { self.revision }
     }
 
     /// Gets the absolute path to the directory where all output for the given
diff --git a/src/tools/compiletest/src/runtest/coverage.rs b/src/tools/compiletest/src/runtest/coverage.rs
index 38f0e956474..d0a0c960b45 100644
--- a/src/tools/compiletest/src/runtest/coverage.rs
+++ b/src/tools/compiletest/src/runtest/coverage.rs
@@ -6,7 +6,7 @@ use std::process::Command;
 use camino::{Utf8Path, Utf8PathBuf};
 use glob::glob;
 
-use crate::common::{UI_COVERAGE, UI_COVERAGE_MAP};
+use crate::common::{TestSuite, UI_COVERAGE, UI_COVERAGE_MAP};
 use crate::runtest::{Emit, ProcRes, TestCx, WillExecute};
 use crate::util::static_regex;
 
@@ -91,7 +91,7 @@ impl<'test> TestCx<'test> {
         let mut profraw_paths = vec![profraw_path];
         let mut bin_paths = vec![self.make_exe_name()];
 
-        if self.config.suite == "coverage-run-rustdoc" {
+        if self.config.suite == TestSuite::CoverageRunRustdoc {
             self.run_doctests_for_coverage(&mut profraw_paths, &mut bin_paths);
         }
 
diff --git a/src/tools/compiletest/src/runtest/run_make.rs b/src/tools/compiletest/src/runtest/run_make.rs
index 60e8e16e25e..c8d5190c039 100644
--- a/src/tools/compiletest/src/runtest/run_make.rs
+++ b/src/tools/compiletest/src/runtest/run_make.rs
@@ -225,6 +225,19 @@ impl TestCx<'_> {
             cmd.env("RUNNER", runner);
         }
 
+        // Guard against externally-set env vars.
+        cmd.env_remove("__RUSTC_DEBUG_ASSERTIONS_ENABLED");
+        if self.config.with_rustc_debug_assertions {
+            // Used for `run_make_support::env::rustc_debug_assertions_enabled`.
+            cmd.env("__RUSTC_DEBUG_ASSERTIONS_ENABLED", "1");
+        }
+
+        cmd.env_remove("__STD_DEBUG_ASSERTIONS_ENABLED");
+        if self.config.with_std_debug_assertions {
+            // Used for `run_make_support::env::std_debug_assertions_enabled`.
+            cmd.env("__STD_DEBUG_ASSERTIONS_ENABLED", "1");
+        }
+
         // We don't want RUSTFLAGS set from the outside to interfere with
         // compiler flags set in the test cases:
         cmd.env_remove("RUSTFLAGS");
diff --git a/src/tools/compiletest/src/runtest/rustdoc.rs b/src/tools/compiletest/src/runtest/rustdoc.rs
index 637ea833357..236f021ce82 100644
--- a/src/tools/compiletest/src/runtest/rustdoc.rs
+++ b/src/tools/compiletest/src/runtest/rustdoc.rs
@@ -4,7 +4,7 @@ use super::{TestCx, remove_and_create_dir_all};
 
 impl TestCx<'_> {
     pub(super) fn run_rustdoc_test(&self) {
-        assert!(self.revision.is_none(), "revisions not relevant here");
+        assert!(self.revision.is_none(), "revisions not supported in this test suite");
 
         let out_dir = self.output_base_dir();
         remove_and_create_dir_all(&out_dir).unwrap_or_else(|e| {
diff --git a/src/tools/compiletest/src/runtest/rustdoc_json.rs b/src/tools/compiletest/src/runtest/rustdoc_json.rs
index 9f88faca892..4f35efedfde 100644
--- a/src/tools/compiletest/src/runtest/rustdoc_json.rs
+++ b/src/tools/compiletest/src/runtest/rustdoc_json.rs
@@ -6,7 +6,7 @@ impl TestCx<'_> {
     pub(super) fn run_rustdoc_json_test(&self) {
         //FIXME: Add bless option.
 
-        assert!(self.revision.is_none(), "revisions not relevant here");
+        assert!(self.revision.is_none(), "revisions not supported in this test suite");
 
         let out_dir = self.output_base_dir();
         remove_and_create_dir_all(&out_dir).unwrap_or_else(|e| {
diff --git a/src/tools/compiletest/src/runtest/ui.rs b/src/tools/compiletest/src/runtest/ui.rs
index f6bc85cd051..0507c2600ae 100644
--- a/src/tools/compiletest/src/runtest/ui.rs
+++ b/src/tools/compiletest/src/runtest/ui.rs
@@ -6,8 +6,8 @@ use rustfix::{Filter, apply_suggestions, get_suggestions_from_json};
 use tracing::debug;
 
 use super::{
-    AllowUnused, Emit, FailMode, LinkToAux, PassMode, TargetLocation, TestCx, TestOutput,
-    Truncated, UI_FIXED, WillExecute,
+    AllowUnused, Emit, FailMode, LinkToAux, PassMode, RunFailMode, RunResult, TargetLocation,
+    TestCx, TestOutput, Truncated, UI_FIXED, WillExecute,
 };
 use crate::json;
 
@@ -140,12 +140,53 @@ impl TestCx<'_> {
                     &proc_res,
                 );
             }
+            let code = proc_res.status.code();
+            let run_result = if proc_res.status.success() {
+                RunResult::Pass
+            } else if code.is_some_and(|c| c >= 1 && c <= 127) {
+                RunResult::Fail
+            } else {
+                RunResult::Crash
+            };
+            // Help users understand why the test failed by including the actual
+            // exit code and actual run result in the failure message.
+            let pass_hint = format!("code={code:?} so test would pass with `{run_result}`");
             if self.should_run_successfully(pm) {
-                if !proc_res.status.success() {
-                    self.fatal_proc_rec("test run failed!", &proc_res);
+                if run_result != RunResult::Pass {
+                    self.fatal_proc_rec(
+                        &format!("test did not exit with success! {pass_hint}"),
+                        &proc_res,
+                    );
+                }
+            } else if self.props.fail_mode == Some(FailMode::Run(RunFailMode::Fail)) {
+                // If the test is marked as `run-fail` but do not support
+                // unwinding we allow it to crash, since a panic will trigger an
+                // abort (crash) instead of unwind (exit with code 101).
+                let crash_ok = !self.config.can_unwind();
+                if run_result != RunResult::Fail && !(crash_ok && run_result == RunResult::Crash) {
+                    let err = if crash_ok {
+                        format!(
+                            "test did not exit with failure or crash (`{}` can't unwind)! {pass_hint}",
+                            self.config.target
+                        )
+                    } else {
+                        format!("test did not exit with failure! {pass_hint}")
+                    };
+                    self.fatal_proc_rec(&err, &proc_res);
                 }
-            } else if proc_res.status.success() {
-                self.fatal_proc_rec("test run succeeded!", &proc_res);
+            } else if self.props.fail_mode == Some(FailMode::Run(RunFailMode::Crash)) {
+                if run_result != RunResult::Crash {
+                    self.fatal_proc_rec(&format!("test did not crash! {pass_hint}"), &proc_res);
+                }
+            } else if self.props.fail_mode == Some(FailMode::Run(RunFailMode::FailOrCrash)) {
+                if run_result != RunResult::Fail && run_result != RunResult::Crash {
+                    self.fatal_proc_rec(
+                        &format!("test did not exit with failure or crash! {pass_hint}"),
+                        &proc_res,
+                    );
+                }
+            } else {
+                unreachable!("run_ui_test() must not be called if the test should not run");
             }
 
             self.get_output(&proc_res)
diff --git a/src/tools/compiletest/src/tests.rs b/src/tools/compiletest/src/tests.rs
index e3e4a81755d..174ec9381f6 100644
--- a/src/tools/compiletest/src/tests.rs
+++ b/src/tools/compiletest/src/tests.rs
@@ -67,11 +67,7 @@ fn is_test_test() {
 
 #[test]
 fn string_enums() {
-    // These imports are needed for the macro-generated code
-    use std::fmt;
-    use std::str::FromStr;
-
-    crate::common::string_enum! {
+    crate::util::string_enum! {
         #[derive(Clone, Copy, Debug, PartialEq)]
         enum Animal {
             Cat => "meow",
diff --git a/src/tools/compiletest/src/util.rs b/src/tools/compiletest/src/util.rs
index 202582bea8c..fb047548c45 100644
--- a/src/tools/compiletest/src/util.rs
+++ b/src/tools/compiletest/src/util.rs
@@ -104,3 +104,42 @@ macro_rules! static_regex {
     }};
 }
 pub(crate) use static_regex;
+
+macro_rules! string_enum {
+    ($(#[$meta:meta])* $vis:vis enum $name:ident { $($variant:ident => $repr:expr,)* }) => {
+        $(#[$meta])*
+        $vis enum $name {
+            $($variant,)*
+        }
+
+        impl $name {
+            $vis const VARIANTS: &'static [Self] = &[$(Self::$variant,)*];
+            $vis const STR_VARIANTS: &'static [&'static str] = &[$(Self::$variant.to_str(),)*];
+
+            $vis const fn to_str(&self) -> &'static str {
+                match self {
+                    $(Self::$variant => $repr,)*
+                }
+            }
+        }
+
+        impl ::std::fmt::Display for $name {
+            fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
+                ::std::fmt::Display::fmt(self.to_str(), f)
+            }
+        }
+
+        impl ::std::str::FromStr for $name {
+            type Err = String;
+
+            fn from_str(s: &str) -> Result<Self, Self::Err> {
+                match s {
+                    $($repr => Ok(Self::$variant),)*
+                    _ => Err(format!(concat!("unknown `", stringify!($name), "` variant: `{}`"), s)),
+                }
+            }
+        }
+    }
+}
+
+pub(crate) use string_enum;
diff --git a/src/tools/enzyme b/src/tools/enzyme
-Subproject b5098d515d5e1bd0f5470553bc0d18da9794ca8
+Subproject 2cccfba93c1650f26f1cf8be8aa875a7c1d23fb
diff --git a/src/tools/jsondocck/src/directive.rs b/src/tools/jsondocck/src/directive.rs
index fdb2fa6dbbe..c52c1686660 100644
--- a/src/tools/jsondocck/src/directive.rs
+++ b/src/tools/jsondocck/src/directive.rs
@@ -105,13 +105,10 @@ impl DirectiveKind {
                 [_path, value] => Self::HasNotValue { value: value.clone() },
                 _ => panic!("`//@ !has` must have 2 or 3 arguments, but got {args:?}"),
             },
-            // Ignore compiletest directives, like //@ edition
-            (_, false) if KNOWN_DIRECTIVE_NAMES.contains(&directive_name) => {
-                return None;
-            }
-            _ => {
-                panic!("Invalid directive `//@ {}{directive_name}`", if negated { "!" } else { "" })
-            }
+            // Ignore unknown directives as they might be compiletest directives
+            // since they share the same `//@` prefix by convention. In any case,
+            // compiletest rejects unknown directives for us.
+            _ => return None,
         };
 
         Some((kind, &args[0]))
@@ -216,10 +213,6 @@ fn get_one<'a>(matches: &[&'a Value]) -> Result<&'a Value, String> {
     }
 }
 
-// FIXME: This setup is temporary until we figure out how to improve this situation.
-//        See <https://github.com/rust-lang/rust/issues/125813#issuecomment-2141953780>.
-include!(concat!(env!("CARGO_MANIFEST_DIR"), "/../compiletest/src/directive-list.rs"));
-
 fn string_to_value<'a>(s: &str, cache: &'a Cache) -> Cow<'a, Value> {
     if s.starts_with("$") {
         Cow::Borrowed(&cache.variables.get(&s[1..]).unwrap_or_else(|| {
diff --git a/src/tools/jsondocck/src/main.rs b/src/tools/jsondocck/src/main.rs
index d84be4d3a3a..c3487565c23 100644
--- a/src/tools/jsondocck/src/main.rs
+++ b/src/tools/jsondocck/src/main.rs
@@ -47,8 +47,8 @@ static LINE_PATTERN: LazyLock<Regex> = LazyLock::new(|| {
         ^\s*
         //@\s+
         (?P<negated>!?)
-        (?P<directive>[A-Za-z0-9]+(?:-[A-Za-z0-9]+)*)
-        (?P<args>.*)$
+        (?P<directive>.+?)
+        (?:[\s:](?P<args>.*))?$
     "#,
     )
     .ignore_whitespace(true)
@@ -58,15 +58,7 @@ static LINE_PATTERN: LazyLock<Regex> = LazyLock::new(|| {
 });
 
 static DEPRECATED_LINE_PATTERN: LazyLock<Regex> = LazyLock::new(|| {
-    RegexBuilder::new(
-        r#"
-        //\s+@
-    "#,
-    )
-    .ignore_whitespace(true)
-    .unicode(true)
-    .build()
-    .unwrap()
+    RegexBuilder::new(r"//\s+@").ignore_whitespace(true).unicode(true).build().unwrap()
 });
 
 fn print_err(msg: &str, lineno: usize) {
@@ -94,7 +86,7 @@ fn get_directives(template: &str) -> Result<Vec<Directive>, ()> {
 
         let negated = &cap["negated"] == "!";
 
-        let args_str = &cap["args"];
+        let args_str = cap.name("args").map(|m| m.as_str()).unwrap_or_default();
         let Some(args) = shlex::split(args_str) else {
             print_err(&format!("Invalid arguments to shlex::split: `{args_str}`",), lineno);
             errors = true;
diff --git a/src/tools/lint-docs/Cargo.toml b/src/tools/lint-docs/Cargo.toml
index e914a2df2ba..6e1ab84ed18 100644
--- a/src/tools/lint-docs/Cargo.toml
+++ b/src/tools/lint-docs/Cargo.toml
@@ -7,7 +7,7 @@ description = "A script to extract the lint documentation for the rustc book."
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-rustc-literal-escaper = "0.0.4"
+rustc-literal-escaper = "0.0.5"
 serde_json = "1.0.57"
 tempfile = "3.1.0"
 walkdir = "2.3.1"
diff --git a/src/tools/lint-docs/src/groups.rs b/src/tools/lint-docs/src/groups.rs
index 78d4f87ed0d..a24fbbc0cea 100644
--- a/src/tools/lint-docs/src/groups.rs
+++ b/src/tools/lint-docs/src/groups.rs
@@ -26,6 +26,10 @@ static GROUP_DESCRIPTIONS: &[(&str, &str)] = &[
         "Lints that detect identifiers which will be come keywords in later editions",
     ),
     ("deprecated-safe", "Lints for functions which were erroneously marked as safe in the past"),
+    (
+        "unknown-or-malformed-diagnostic-attributes",
+        "detects unknown or malformed diagnostic attributes",
+    ),
 ];
 
 type LintGroups = BTreeMap<String, BTreeSet<String>>;
diff --git a/src/tools/miri/CONTRIBUTING.md b/src/tools/miri/CONTRIBUTING.md
index fef7f807e93..637c0dd2fdf 100644
--- a/src/tools/miri/CONTRIBUTING.md
+++ b/src/tools/miri/CONTRIBUTING.md
@@ -13,16 +13,20 @@ for a list of Miri maintainers.
 
 [Rust Zulip]: https://rust-lang.zulipchat.com
 
-### Pull review process
+### PR review process
 
 When you get a review, please take care of the requested changes in new commits. Do not amend
 existing commits. Generally avoid force-pushing. The only time you should force push is when there
 is a conflict with the master branch (in that case you should rebase across master, not merge), and
 all the way at the end of the review process when the reviewer tells you that the PR is done and you
-should squash the commits. If you are unsure how to use `git rebase` to squash commits, use `./miri
-squash` which automates the process but leaves little room for customization. (All this is to work
-around the fact that Github is quite bad at dealing with force pushes and does not support `git
-range-diff`. Maybe one day Github will be good at git and then life can become easier.)
+should squash the commits. (All this is to work around the fact that Github is quite bad at
+dealing with force pushes and does not support `git range-diff`.)
+
+The recommended way to squash commits is to use `./miri squash`, which will make everything into a
+single commit. You will be asked for the commit message; please ensure it describes the entire PR.
+You can also use `git rebase` manually if you need more control (e.g. if there should be more than
+one commit at the end), but then please use `--keep-base` to ensure the PR remains based on the same
+upstream commit.
 
 Most PRs bounce back and forth between the reviewer and the author several times, so it is good to
 keep track of who is expected to take the next step. We are using the `S-waiting-for-review` and
@@ -348,6 +352,7 @@ https. Add the following to your `.gitconfig`:
 
 The following environment variables are relevant to `./miri`:
 
+* `CARGO` sets the binary used to execute Cargo; if none is specified, defaults to `cargo`.
 * `MIRI_AUTO_OPS` indicates whether the automatic execution of rustfmt, clippy and toolchain setup
   (as controlled by the `./auto-*` files) should be skipped. If it is set to `no`, they are skipped.
   This is used to allow automated IDE actions to avoid the auto ops.
diff --git a/src/tools/miri/Cargo.lock b/src/tools/miri/Cargo.lock
index aa6f059cec2..0af4181dc15 100644
--- a/src/tools/miri/Cargo.lock
+++ b/src/tools/miri/Cargo.lock
@@ -4,18 +4,18 @@ version = 4
 
 [[package]]
 name = "addr2line"
-version = "0.21.0"
+version = "0.24.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb"
+checksum = "dfbe277e56a376000877090da837660b4427aad530e3028d44e0bffe4f89a1c1"
 dependencies = [
  "gimli",
 ]
 
 [[package]]
-name = "adler"
-version = "1.0.2"
+name = "adler2"
+version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
 
 [[package]]
 name = "aes"
@@ -44,40 +44,40 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "710e8eae58854cdc1790fcb56cca04d712a17be849eeb81da2a724bf4bae2bc4"
 dependencies = [
  "anstyle",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
 ]
 
 [[package]]
 name = "anstyle"
-version = "1.0.10"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55cc3b69f167a1ef2e161439aa98aed94e6028e5f9a59be9a6ffb47aef1651f9"
+checksum = "862ed96ca487e809f1c8e5a8447f6ee2cf102f846893800b20cebdf541fc6bbd"
 
 [[package]]
 name = "anyhow"
-version = "1.0.97"
+version = "1.0.98"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcfed56ad506cb2c684a14971b8861fdc3baaaae314b9e5f9bb532cbe3ba7a4f"
+checksum = "e16d2d3311acee920a9eb8d33b8cbc1787ce4a264e85f964c2404b969bdcd487"
 
 [[package]]
 name = "autocfg"
-version = "1.4.0"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
+checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
 
 [[package]]
 name = "backtrace"
-version = "0.3.71"
+version = "0.3.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26b05800d2e817c8b3b4b54abd461726265fa9789ae34330622f2db9ee696f9d"
+checksum = "6806a6321ec58106fea15becdad98371e28d92ccbc7c8f1b3b6dd724fe8f1002"
 dependencies = [
  "addr2line",
- "cc",
  "cfg-if",
  "libc",
  "miniz_oxide",
  "object",
  "rustc-demangle",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -91,15 +91,15 @@ dependencies = [
 
 [[package]]
 name = "bitflags"
-version = "2.9.0"
+version = "2.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c8214115b7bf84099f1309324e63141d4c5d7cc26862f97a0a857dbefe165bd"
+checksum = "1b8e56985ec62d17e9c1001dc89c88ecd7dc08e47eba5ec7c29c7b5eeecde967"
 
 [[package]]
 name = "bstr"
-version = "1.11.3"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "531a9155a481e2ee699d4f98f43c0ca4ff8ee1bfd55c31e9e98fb29d2b176fe0"
+checksum = "234113d19d0d7d613b40e86fb654acf958910802bcceab913a4f9e7cda03b1a4"
 dependencies = [
  "memchr",
  "regex-automata",
@@ -108,15 +108,15 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.17.0"
+version = "3.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1628fb46dfa0b37568d12e5edd512553eccf6a22a78e8bde00bb4aed84d5bdbf"
+checksum = "46c5e41b57b8bba42a04676d81cb89e9ee8e859a1a66f80a5a72e1cb76b34d43"
 
 [[package]]
 name = "camino"
-version = "1.1.9"
+version = "1.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b96ec4966b5813e2c0507c1f86115c8c5abaadc3980879c3424042a02fd1ad3"
+checksum = "0da45bc31171d8d6960122e222a67740df867c1dd53b4d51caa297084c185cab"
 dependencies = [
  "serde",
 ]
@@ -166,18 +166,18 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.2.17"
+version = "1.2.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fcb57c740ae1daf453ae85f16e37396f672b039e00d9d866e07ddb24e328e3a"
+checksum = "deec109607ca693028562ed836a5f1c4b8bd77755c4e132fc5ce11b0b6211ae7"
 dependencies = [
  "shlex",
 ]
 
 [[package]]
 name = "cfg-if"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+checksum = "9555578bc9e57714c812a1f84e4fc5b4d21fcb063490c624de019f7464c91268"
 
 [[package]]
 name = "cfg_aliases"
@@ -187,35 +187,24 @@ checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
 [[package]]
 name = "chrono"
-version = "0.4.40"
+version = "0.4.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a7964611d71df112cb1730f2ee67324fcf4d0fc6606acbbe9bfe06df124637c"
+checksum = "c469d952047f47f91b68d1cba3f10d63c11d73e4636f24f08daf0278abf01c4d"
 dependencies = [
  "num-traits",
 ]
 
 [[package]]
 name = "chrono-tz"
-version = "0.10.3"
+version = "0.10.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "efdce149c370f133a071ca8ef6ea340b7b88748ab0810097a9e2976eaa34b4f3"
+checksum = "a6139a8597ed92cf816dfb33f5dd6cf0bb93a6adc938f11039f371bc5bcd26c3"
 dependencies = [
  "chrono",
- "chrono-tz-build",
  "phf",
 ]
 
 [[package]]
-name = "chrono-tz-build"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f10f8c9340e31fc120ff885fcdb54a0b48e474bbd77cab557f0c30a3e569402"
-dependencies = [
- "parse-zoneinfo",
- "phf_codegen",
-]
-
-[[package]]
 name = "cipher"
 version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -227,27 +216,27 @@ dependencies = [
 
 [[package]]
 name = "color-eyre"
-version = "0.6.3"
+version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55146f5e46f237f7423d74111267d4597b59b0dad0ffaf7303bce9945d843ad5"
+checksum = "e5920befb47832a6d61ee3a3a846565cfa39b331331e68a3b1d1116630f2f26d"
 dependencies = [
  "backtrace",
  "color-spantrace",
  "eyre",
  "indenter",
  "once_cell",
- "owo-colors",
+ "owo-colors 4.2.2",
  "tracing-error",
 ]
 
 [[package]]
 name = "color-spantrace"
-version = "0.2.1"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd6be1b2a7e382e2b98b43b2adcca6bb0e465af0bdd38123873ae61eb17a72c2"
+checksum = "b8b88ea9df13354b55bc7234ebcce36e6ef896aca2e42a15de9e10edce01b427"
 dependencies = [
  "once_cell",
- "owo-colors",
+ "owo-colors 4.2.2",
  "tracing-core",
  "tracing-error",
 ]
@@ -263,6 +252,15 @@ dependencies = [
 ]
 
 [[package]]
+name = "colored"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fde0e0ec90c9dfb3b4b1a0891a7dcd0e2bffde2f7efed5fe7c9bb00e5bfb915e"
+dependencies = [
+ "windows-sys 0.59.0",
+]
+
+[[package]]
 name = "comma"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -277,7 +275,7 @@ dependencies = [
  "encode_unicode",
  "libc",
  "once_cell",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
  "windows-sys 0.59.0",
 ]
 
@@ -333,7 +331,7 @@ dependencies = [
  "libc",
  "option-ext",
  "redox_users",
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -344,12 +342,12 @@ checksum = "34aa73646ffb006b8f5147f3dc182bd4bcb190227ce861fc4a4844bf8e3cb2c0"
 
 [[package]]
 name = "errno"
-version = "0.3.11"
+version = "0.3.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "976dd42dc7e85965fe702eb8164f21f450704bdde31faefd6471dba214cb594e"
+checksum = "778e2ac28f6c47af28e4907f13ffd1e1ddbd400980a9abd7c8df189bf578a5ad"
 dependencies = [
  "libc",
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -386,20 +384,20 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.15"
+version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
+checksum = "335ff9f135e4384c8150d6f27c6daed433577f86b4750418338c01a1a2528592"
 dependencies = [
  "cfg-if",
  "libc",
- "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasi 0.11.1+wasi-snapshot-preview1",
 ]
 
 [[package]]
 name = "getrandom"
-version = "0.3.2"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73fea8450eea4bac3940448fb7ae50d91f034f941199fcd9d909a5a07aa455f0"
+checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
 dependencies = [
  "cfg-if",
  "libc",
@@ -409,9 +407,9 @@ dependencies = [
 
 [[package]]
 name = "gimli"
-version = "0.28.1"
+version = "0.31.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4271d37baee1b8c7e4b708028c57d816cf9d2434acb33a549475f78c181f6253"
+checksum = "07e28edb80900c19c28f1072f2e8aeca7fa06b23cd4169cefe1af5aa3260783f"
 
 [[package]]
 name = "indenter"
@@ -428,7 +426,7 @@ dependencies = [
  "console",
  "number_prefix",
  "portable-atomic",
- "unicode-width 0.2.0",
+ "unicode-width 0.2.1",
  "web-time",
 ]
 
@@ -443,17 +441,16 @@ dependencies = [
 
 [[package]]
 name = "ipc-channel"
-version = "0.19.0"
+version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6fb8251fb7bcd9ccd3725ed8deae9fe7db8e586495c9eb5b0c52e6233e5e75ea"
+checksum = "5b1c98b70019c830a1fc39cecfe1f60ff99c4122f0a189697c810c90ec545c14"
 dependencies = [
  "bincode",
  "crossbeam-channel",
  "fnv",
- "lazy_static",
  "libc",
  "mio",
- "rand 0.8.5",
+ "rand",
  "serde",
  "tempfile",
  "uuid",
@@ -490,15 +487,15 @@ checksum = "db13adb97ab515a3691f56e4dbab09283d0b86cb45abd991d8634a9d6f501760"
 
 [[package]]
 name = "libc"
-version = "0.2.171"
+version = "0.2.174"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c19937216e9d3aa9956d9bb8dfc0b0c8beb6058fc4f7a4dc4d850edf86a237d6"
+checksum = "1171693293099992e19cddea4e8b849964e9846f4acee11b3948bcc337be8776"
 
 [[package]]
 name = "libffi"
-version = "4.0.0"
+version = "4.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4a9434b6fc77375fb624698d5f8c49d7e80b10d59eb1219afda27d1f824d4074"
+checksum = "e7681c6fab541f799a829e44a445a0666cf8d8a6cfebf89419e6aed52c604e87"
 dependencies = [
  "libc",
  "libffi-sys",
@@ -506,28 +503,28 @@ dependencies = [
 
 [[package]]
 name = "libffi-sys"
-version = "3.2.0"
+version = "3.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ead36a2496acfc8edd6cc32352110e9478ac5b9b5f5b9856ebd3d28019addb84"
+checksum = "7b0d828d367b4450ed08e7d510dc46636cd660055f50d67ac943bfe788767c29"
 dependencies = [
  "cc",
 ]
 
 [[package]]
 name = "libloading"
-version = "0.8.6"
+version = "0.8.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc2f4eb4bc735547cfed7c0a4922cbd04a4655978c09b54f1f7b228750664c34"
+checksum = "07033963ba89ebaf1584d767badaa2e8fcec21aedea6b8c0346d487d49c28667"
 dependencies = [
  "cfg-if",
- "windows-targets",
+ "windows-targets 0.53.2",
 ]
 
 [[package]]
 name = "libredox"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0ff37bd590ca25063e35af745c343cb7a0271906fb7b37e4813e8f79f00268d"
+checksum = "1580801010e535496706ba011c15f8532df6b42297d2e471fec38ceadd8c0638"
 dependencies = [
  "bitflags",
  "libc",
@@ -535,15 +532,15 @@ dependencies = [
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.9.3"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe7db12097d22ec582439daf8618b8fdd1a7bef6270e9af3b1ebcd30893cf413"
+checksum = "cd945864f07fe9f5371a27ad7b52a172b4b499999f1d97574c9fa68373937e12"
 
 [[package]]
 name = "lock_api"
-version = "0.4.12"
+version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07af8b9cdd281b7915f413fa73f29ebd5d55d0d3f0155584dade1ff18cea1b17"
+checksum = "96936507f153605bddfcda068dd804796c84324ed2510809e5b2a624c81da765"
 dependencies = [
  "autocfg",
  "scopeguard",
@@ -557,9 +554,9 @@ checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
 
 [[package]]
 name = "measureme"
-version = "12.0.1"
+version = "12.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "570a507d8948a66a97f42cbbaf8a6bb9516a51017d4ee949502ad7a10a864395"
+checksum = "6ebd1ebda747ae161a4a377bf93f87e18d46faad2331cc0c7d25b84b1d445f49"
 dependencies = [
  "log",
  "memmap2",
@@ -571,9 +568,9 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.7.4"
+version = "2.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+checksum = "32a282da65faaf38286cf3be983213fcf1d2e2a58700e808f83f4ea9a4804bc0"
 
 [[package]]
 name = "memmap2"
@@ -586,23 +583,22 @@ dependencies = [
 
 [[package]]
 name = "miniz_oxide"
-version = "0.7.4"
+version = "0.8.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8a240ddb74feaf34a79a7add65a741f3167852fba007066dcac1ca548d89c08"
+checksum = "1fa76a2c86f704bdb222d66965fb3d63269ce38518b83cb0575fca855ebb6316"
 dependencies = [
- "adler",
+ "adler2",
 ]
 
 [[package]]
 name = "mio"
-version = "1.0.3"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2886843bf800fba2e3377cff24abf6379b4c4d5c6681eaf9ea5b0d15090450bd"
+checksum = "78bed444cc8a2160f01cbcf811ef18cac863ad68ae8ca62092e8db51d51c761c"
 dependencies = [
  "libc",
- "log",
- "wasi 0.11.0+wasi-snapshot-preview1",
- "windows-sys 0.52.0",
+ "wasi 0.11.1+wasi-snapshot-preview1",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -614,16 +610,16 @@ dependencies = [
  "capstone",
  "chrono",
  "chrono-tz",
- "colored",
+ "colored 3.0.0",
  "directories",
- "getrandom 0.3.2",
+ "getrandom 0.3.3",
  "ipc-channel",
  "libc",
  "libffi",
  "libloading",
  "measureme",
  "nix",
- "rand 0.9.0",
+ "rand",
  "regex",
  "rustc_version",
  "serde",
@@ -663,9 +659,9 @@ checksum = "830b246a0e5f20af87141b25c173cd1b609bd7779a4617d6ec582abaf90870f3"
 
 [[package]]
 name = "object"
-version = "0.32.2"
+version = "0.36.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6a622008b6e321afc04970976f62ee297fdbaa6f95318ca343e3eebb9648441"
+checksum = "62948e14d923ea95ea2c7c86c71013138b66525b86bdc08d2dcc262bdb497b87"
 dependencies = [
  "memchr",
 ]
@@ -689,6 +685,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c1b04fb49957986fdce4d6ee7a65027d55d4b6d2265e5848bbb507b58ccfdb6f"
 
 [[package]]
+name = "owo-colors"
+version = "4.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48dd4f4a2c8405440fd0462561f0e5806bd0f77e86f51c761481bdd4018b545e"
+
+[[package]]
 name = "pad"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -699,9 +701,9 @@ dependencies = [
 
 [[package]]
 name = "parking_lot"
-version = "0.12.3"
+version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1bf18183cf54e8d6059647fc3063646a1801cf30896933ec2311622cc4b9a27"
+checksum = "70d58bf43669b5795d1576d0641cfb6fbb2057bf629506267a92807158584a13"
 dependencies = [
  "lock_api",
  "parking_lot_core",
@@ -709,24 +711,15 @@ dependencies = [
 
 [[package]]
 name = "parking_lot_core"
-version = "0.9.10"
+version = "0.9.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e401f977ab385c9e4e3ab30627d6f26d00e2c73eef317493c4ec6d468726cf8"
+checksum = "bc838d2a56b5b1a6c25f55575dfc605fabb63bb2365f6c2353ef9159aa69e4a5"
 dependencies = [
  "cfg-if",
  "libc",
  "redox_syscall",
  "smallvec",
- "windows-targets",
-]
-
-[[package]]
-name = "parse-zoneinfo"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f2a05b18d44e2957b88f96ba460715e295bc1d7510468a2f3d3b44535d26c24"
-dependencies = [
- "regex",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -740,38 +733,18 @@ dependencies = [
 
 [[package]]
 name = "phf"
-version = "0.11.3"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fd6780a80ae0c52cc120a26a1a42c1ae51b247a253e4e06113d23d2c2edd078"
+checksum = "913273894cec178f401a31ec4b656318d95473527be05c0752cc41cdc32be8b7"
 dependencies = [
  "phf_shared",
 ]
 
 [[package]]
-name = "phf_codegen"
-version = "0.11.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aef8048c789fa5e851558d709946d6d79a8ff88c0440c587967f8e94bfb1216a"
-dependencies = [
- "phf_generator",
- "phf_shared",
-]
-
-[[package]]
-name = "phf_generator"
-version = "0.11.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c80231409c20246a13fddb31776fb942c38553c51e871f8cbd687a4cfb5843d"
-dependencies = [
- "phf_shared",
- "rand 0.8.5",
-]
-
-[[package]]
 name = "phf_shared"
-version = "0.11.3"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "67eabc2ef2a60eb7faa00097bd1ffdb5bd28e62bf39990626a582201b7a754e5"
+checksum = "06005508882fb681fd97892ecff4b7fd0fee13ef1aa569f8695dae7ab9099981"
 dependencies = [
  "siphasher",
 ]
@@ -784,9 +757,9 @@ checksum = "3b3cff922bd51709b605d9ead9aa71031d81447142d828eb4a6eba76fe619f9b"
 
 [[package]]
 name = "portable-atomic"
-version = "1.11.0"
+version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "350e9b48cbc6b0e028b0473b114454c6316e57336ee184ceab6e53f72c178b3e"
+checksum = "f84267b20a16ea918e43c6a88433c2d54fa145c92a811b5b047ccbe153674483"
 
 [[package]]
 name = "ppv-lite86"
@@ -803,15 +776,15 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "abec3fb083c10660b3854367697da94c674e9e82aa7511014dc958beeb7215e9"
 dependencies = [
- "owo-colors",
+ "owo-colors 3.5.0",
  "pad",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.94"
+version = "1.0.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a31971752e70b8b2686d7e46ec17fb38dad4051d94024c88df49b667caea9c84"
+checksum = "02b3e5e68a3a1a02aad3ec490a98007cbc13c37cbe84a3cd7b8e406d76e7f778"
 dependencies = [
  "unicode-ident",
 ]
@@ -827,40 +800,18 @@ dependencies = [
 
 [[package]]
 name = "r-efi"
-version = "5.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74765f6d916ee2faa39bc8e68e4f3ed8949b48cccdac59983d287a7cb71ce9c5"
-
-[[package]]
-name = "rand"
-version = "0.8.5"
+version = "5.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
-dependencies = [
- "libc",
- "rand_chacha 0.3.1",
- "rand_core 0.6.4",
-]
+checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
 
 [[package]]
 name = "rand"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3779b94aeb87e8bd4e834cee3650289ee9e0d5677f976ecdb6d219e5f4f6cd94"
-dependencies = [
- "rand_chacha 0.9.0",
- "rand_core 0.9.3",
- "zerocopy",
-]
-
-[[package]]
-name = "rand_chacha"
-version = "0.3.1"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+checksum = "9fbfd9d094a40bf3ae768db9361049ace4c0e04a4fd6b359518bd7b73a73dd97"
 dependencies = [
- "ppv-lite86",
- "rand_core 0.6.4",
+ "rand_chacha",
+ "rand_core",
 ]
 
 [[package]]
@@ -870,16 +821,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
 dependencies = [
  "ppv-lite86",
- "rand_core 0.9.3",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.6.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
-dependencies = [
- "getrandom 0.2.15",
+ "rand_core",
 ]
 
 [[package]]
@@ -888,14 +830,14 @@ version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "99d9a13982dcf210057a8a78572b2217b667c3beacbf3a0d8b454f6f82837d38"
 dependencies = [
- "getrandom 0.3.2",
+ "getrandom 0.3.3",
 ]
 
 [[package]]
 name = "redox_syscall"
-version = "0.5.10"
+version = "0.5.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b8c0c260b63a8219631167be35e6a988e9554dbd323f8bd08439c8ed1302bd1"
+checksum = "0d04b7d0ee6b4a0207a0a7adb104d23ecb0b47d6beae7152d0fa34b692b29fd6"
 dependencies = [
  "bitflags",
 ]
@@ -906,7 +848,7 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd6f9d3d47bdd2ad6945c5015a226ec6155d0bcdfd8f7cd29f86b71f8de99d2b"
 dependencies = [
- "getrandom 0.2.15",
+ "getrandom 0.2.16",
  "libredox",
  "thiserror 2.0.12",
 ]
@@ -942,9 +884,9 @@ checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
 
 [[package]]
 name = "rustc-demangle"
-version = "0.1.24"
+version = "0.1.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "719b953e2095829ee67db738b3bfa9fa368c94900df327b3f07fe6e794d2fe1f"
+checksum = "989e6739f80c4ad5b13e0fd7fe89531180375b18520cc8c82080e4dc4035b84f"
 
 [[package]]
 name = "rustc-hash"
@@ -975,18 +917,24 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "1.0.5"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d97817398dd4bb2e6da002002db259209759911da105da92bec29ccb12cf58bf"
+checksum = "11181fbabf243db407ef8df94a6ce0b2f9a733bd8be4ad02b4eda9602296cac8"
 dependencies = [
  "bitflags",
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
+name = "rustversion"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a0d197bd2c9dc6e53b84da9556a69ba4cdfab8619eb41a8bd1cc2027a0f6b1d"
+
+[[package]]
 name = "ryu"
 version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1029,9 +977,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.140"
+version = "1.0.141"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
+checksum = "30b9eff21ebe718216c6ec64e1d9ac57087aad11efc64e32002bce4a0d4c03d3"
 dependencies = [
  "itoa",
  "memchr",
@@ -1062,25 +1010,26 @@ checksum = "56199f7ddabf13fe5074ce809e7d3f42b42ae711800501b5b16ea82ad029c39d"
 
 [[package]]
 name = "smallvec"
-version = "1.14.0"
+version = "1.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fcf8323ef1faaee30a44a340193b1ac6814fd9b7b4e88e9d4519a3e4abe1cfd"
+checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
 
 [[package]]
 name = "spanned"
-version = "0.3.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "86af297923fbcfd107c20a189a6e9c872160df71a7190ae4a7a6c5dce4b2feb6"
+checksum = "c92d4b0c055fde758f086eb4a6e73410247df8a3837fd606d2caeeaf72aa566d"
 dependencies = [
+ "anyhow",
  "bstr",
  "color-eyre",
 ]
 
 [[package]]
 name = "syn"
-version = "2.0.100"
+version = "2.0.104"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
+checksum = "17b6f705963418cdb9927482fa304bc562ece2fdd4f616084c50b7023b435a40"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1089,12 +1038,12 @@ dependencies = [
 
 [[package]]
 name = "tempfile"
-version = "3.19.1"
+version = "3.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7437ac7763b9b123ccf33c338a5cc1bac6f69b45a136c19bdd8a65e3916435bf"
+checksum = "e8a64e3985349f2441a1a9ef0b853f869006c3855f2cda6862a94d26ebb9d6a1"
 dependencies = [
  "fastrand",
- "getrandom 0.3.2",
+ "getrandom 0.3.3",
  "once_cell",
  "rustix",
  "windows-sys 0.59.0",
@@ -1142,12 +1091,11 @@ dependencies = [
 
 [[package]]
 name = "thread_local"
-version = "1.1.8"
+version = "1.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b9ef9bad013ada3808854ceac7b46812a6465ba368859a37e2100283d2d719c"
+checksum = "f60246a4944f24f6e018aa17cdeffb7818b76356965d03b07d6a9886e8962185"
 dependencies = [
  "cfg-if",
- "once_cell",
 ]
 
 [[package]]
@@ -1172,9 +1120,9 @@ dependencies = [
 
 [[package]]
 name = "tracing-core"
-version = "0.1.33"
+version = "0.1.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e672c95779cf947c5311f83787af4fa8fffd12fb27e4993211a84bdfd9610f9c"
+checksum = "b9d12581f227e93f094d3af2ae690a574abb8a2b9b7a96e7cfe9647b2b617678"
 dependencies = [
  "once_cell",
  "valuable",
@@ -1209,9 +1157,9 @@ checksum = "1dccffe3ce07af9386bfd29e80c0ab1a8205a2fc34e4bcd40364df902cfa8f3f"
 
 [[package]]
 name = "ui_test"
-version = "0.29.2"
+version = "0.30.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1211b1111c752c73b33073d2958072be08825fd97c9ab4d83444da361a06634b"
+checksum = "b56a6897cc4bb6f8daf1939b0b39cd9645856997f46f4d0b3e3cb7122dfe9251"
 dependencies = [
  "annotate-snippets",
  "anyhow",
@@ -1219,7 +1167,7 @@ dependencies = [
  "cargo-platform",
  "cargo_metadata",
  "color-eyre",
- "colored",
+ "colored 2.2.0",
  "comma",
  "crossbeam-channel",
  "indicatif",
@@ -1247,17 +1195,19 @@ checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
 
 [[package]]
 name = "unicode-width"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fc81956842c57dac11422a97c3b8195a1ff727f06e85c84ed2e8aa277c9a0fd"
+checksum = "4a1a07cc7db3810833284e8d372ccdc6da29741639ecc70c9ec107df0fa6154c"
 
 [[package]]
 name = "uuid"
-version = "1.16.0"
+version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "458f7a779bf54acc9f347480ac654f68407d3aab21269a6e3c9f922acd9e2da9"
+checksum = "3cf4199d1e5d15ddd86a694e4d0dffa9c323ce759fea589f00fef9d81cc1931d"
 dependencies = [
- "getrandom 0.3.2",
+ "getrandom 0.3.3",
+ "js-sys",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -1274,9 +1224,9 @@ checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
 [[package]]
 name = "wasi"
-version = "0.11.0+wasi-snapshot-preview1"
+version = "0.11.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
 [[package]]
 name = "wasi"
@@ -1295,6 +1245,7 @@ checksum = "1edc8929d7499fc4e8f0be2262a241556cfc54a0bea223790e71446f2aab1ef5"
 dependencies = [
  "cfg-if",
  "once_cell",
+ "rustversion",
  "wasm-bindgen-macro",
 ]
 
@@ -1361,7 +1312,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd04d41d93c4992d421894c18c8b43496aa748dd4c081bac0dc93eb0489272b6"
 dependencies = [
  "windows-core",
- "windows-targets",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -1374,7 +1325,7 @@ dependencies = [
  "windows-interface",
  "windows-result",
  "windows-strings",
- "windows-targets",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -1405,7 +1356,7 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1d1043d8214f791817bab27572aaa8af63732e11bf84aa21a45a78d6c317ae0e"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -1415,25 +1366,25 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4cd9b125c486025df0eabcb585e62173c6c9eddcec5d117d3b6e8c30e2ee4d10"
 dependencies = [
  "windows-result",
- "windows-targets",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
 name = "windows-sys"
-version = "0.52.0"
+version = "0.59.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
 name = "windows-sys"
-version = "0.59.0"
+version = "0.60.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
+checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.53.2",
 ]
 
 [[package]]
@@ -1442,14 +1393,30 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
 dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_gnullvm",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
+ "windows_aarch64_gnullvm 0.52.6",
+ "windows_aarch64_msvc 0.52.6",
+ "windows_i686_gnu 0.52.6",
+ "windows_i686_gnullvm 0.52.6",
+ "windows_i686_msvc 0.52.6",
+ "windows_x86_64_gnu 0.52.6",
+ "windows_x86_64_gnullvm 0.52.6",
+ "windows_x86_64_msvc 0.52.6",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.53.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c66f69fcc9ce11da9966ddb31a40968cad001c5bedeb5c2b82ede4253ab48aef"
+dependencies = [
+ "windows_aarch64_gnullvm 0.53.0",
+ "windows_aarch64_msvc 0.53.0",
+ "windows_i686_gnu 0.53.0",
+ "windows_i686_gnullvm 0.53.0",
+ "windows_i686_msvc 0.53.0",
+ "windows_x86_64_gnu 0.53.0",
+ "windows_x86_64_gnullvm 0.53.0",
+ "windows_x86_64_msvc 0.53.0",
 ]
 
 [[package]]
@@ -1459,48 +1426,96 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
 [[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86b8d5f90ddd19cb4a147a5fa63ca848db3df085e25fee3cc10b39b6eebae764"
+
+[[package]]
 name = "windows_aarch64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
 [[package]]
+name = "windows_aarch64_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7651a1f62a11b8cbd5e0d42526e55f2c99886c77e007179efff86c2b137e66c"
+
+[[package]]
 name = "windows_i686_gnu"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
 
 [[package]]
+name = "windows_i686_gnu"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1dc67659d35f387f5f6c479dc4e28f1d4bb90ddd1a5d3da2e5d97b42d6272c3"
+
+[[package]]
 name = "windows_i686_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
 [[package]]
+name = "windows_i686_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ce6ccbdedbf6d6354471319e781c0dfef054c81fbc7cf83f338a4296c0cae11"
+
+[[package]]
 name = "windows_i686_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
 [[package]]
+name = "windows_i686_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "581fee95406bb13382d2f65cd4a908ca7b1e4c2f1917f143ba16efe98a589b5d"
+
+[[package]]
 name = "windows_x86_64_gnu"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
 [[package]]
+name = "windows_x86_64_gnu"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e55b5ac9ea33f2fc1716d1742db15574fd6fc8dadc51caab1c16a3d3b4190ba"
+
+[[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
 [[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a6e035dd0599267ce1ee132e51c27dd29437f63325753051e71dd9e42406c57"
+
+[[package]]
 name = "windows_x86_64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
 [[package]]
+name = "windows_x86_64_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
+
+[[package]]
 name = "wit-bindgen-rt"
 version = "0.39.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1511,18 +1526,18 @@ dependencies = [
 
 [[package]]
 name = "zerocopy"
-version = "0.8.24"
+version = "0.8.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2586fea28e186957ef732a5f8b3be2da217d65c5969d4b1e17f973ebbe876879"
+checksum = "1039dd0d3c310cf05de012d8a39ff557cb0d23087fd44cad61df08fc31907a2f"
 dependencies = [
  "zerocopy-derive",
 ]
 
 [[package]]
 name = "zerocopy-derive"
-version = "0.8.24"
+version = "0.8.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a996a8f63c5c4448cd959ac1bab0aaa3306ccfd060472f85943ee0750f0169be"
+checksum = "9ecf5b4cc5364572d7f4c329661bcc82724222973f2cab6f050a4e5c22f75181"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/src/tools/miri/Cargo.toml b/src/tools/miri/Cargo.toml
index 75476d7923c..d293af5cea2 100644
--- a/src/tools/miri/Cargo.toml
+++ b/src/tools/miri/Cargo.toml
@@ -38,18 +38,19 @@ features = ['unprefixed_malloc_on_supported_platforms']
 
 [target.'cfg(unix)'.dependencies]
 libc = "0.2"
-libffi = "4.0.0"
-libloading = "0.8"
+# native-lib dependencies
+libffi = { version = "4.0.0", optional = true }
+libloading = { version = "0.8", optional = true }
+serde = { version = "1.0.219", features = ["derive"], optional = true }
 
 [target.'cfg(target_os = "linux")'.dependencies]
-nix = { version = "0.30.1", features = ["mman", "ptrace", "signal"] }
-ipc-channel = "0.19.0"
-serde = { version = "1.0.219", features = ["derive"] }
-capstone = "0.13"
+nix = { version = "0.30.1", features = ["mman", "ptrace", "signal"], optional = true }
+ipc-channel = { version = "0.20.0", optional = true }
+capstone = { version = "0.13", optional = true }
 
 [dev-dependencies]
-ui_test = "0.29.1"
-colored = "2"
+ui_test = "0.30.2"
+colored = "3"
 rustc_version = "0.4"
 regex = "1.5.5"
 tempfile = "3"
@@ -64,11 +65,12 @@ name = "ui"
 harness = false
 
 [features]
-default = ["stack-cache"]
+default = ["stack-cache", "native-lib"]
 genmc = []
 stack-cache = []
 stack-cache-consistency-check = ["stack-cache"]
 tracing = ["serde_json"]
+native-lib = ["dep:libffi", "dep:libloading", "dep:capstone", "dep:ipc-channel", "dep:nix", "dep:serde"]
 
 [lints.rust.unexpected_cfgs]
 level = "warn"
diff --git a/src/tools/miri/README.md b/src/tools/miri/README.md
index b05acff72b5..7ccd27d7b83 100644
--- a/src/tools/miri/README.md
+++ b/src/tools/miri/README.md
@@ -286,11 +286,6 @@ environment variable. We first document the most relevant and most commonly used
   specific circumstances, but Miri's behavior will also be more stable across versions and targets.
   This is equivalent to `-Zmiri-fixed-schedule -Zmiri-compare-exchange-weak-failure-rate=0.0
   -Zmiri-address-reuse-cross-thread-rate=0.0 -Zmiri-disable-weak-memory-emulation`.
-* `-Zmiri-deterministic-floats` makes Miri's floating-point behavior fully deterministic. This means
-  that operations will always return the preferred NaN, imprecise operations will not have any
-  random error applied to them, and `min`/`max` as "maybe fused" multiply-add all behave
-  deterministically. Note that Miri still uses host floats for some operations, so behavior can
-  still differ depending on the host target and setup.
 * `-Zmiri-disable-isolation` disables host isolation. As a consequence,
   the program has access to host resources such as environment variables, file
   systems, and randomness.
@@ -324,6 +319,8 @@ environment variable. We first document the most relevant and most commonly used
   Can be used without a value; in that case the range defaults to `0..64`.
 * `-Zmiri-many-seeds-keep-going` tells Miri to really try all the seeds in the given range, even if
   a failing seed has already been found. This is useful to determine which fraction of seeds fails.
+* `-Zmiri-no-extra-rounding-error` stops Miri from adding extra rounding errors to float operations
+  that do not have a guaranteed precision.
 * `-Zmiri-num-cpus` states the number of available CPUs to be reported by miri. By default, the
   number of available CPUs is `1`. Note that this flag does not affect how miri handles threads in
   any way.
@@ -342,9 +339,9 @@ environment variable. We first document the most relevant and most commonly used
   is enabled (the default), this is also used to emulate system entropy. The default seed is 0. You
   can increase test coverage by running Miri multiple times with different seeds.
 * `-Zmiri-strict-provenance` enables [strict
-  provenance](https://github.com/rust-lang/rust/issues/95228) checking in Miri. This means that
-  casting an integer to a pointer will stop execution because the provenance of the pointer
-  cannot be determined.
+  provenance](https://doc.rust-lang.org/nightly/std/ptr/index.html#strict-provenance) checking in
+  Miri. This means that casting an integer to a pointer will stop execution because the provenance
+  of the pointer cannot be determined.
 * `-Zmiri-symbolic-alignment-check` makes the alignment check more strict.  By default, alignment is
   checked by casting the pointer to an integer, and making sure that is a multiple of the alignment.
   This can lead to cases where a program passes the alignment check by pure chance, because things
@@ -376,6 +373,12 @@ to Miri failing to detect cases of undefined behavior in a program.
   will always fail and `0.0` means it will never fail. Note that setting it to
   `1.0` will likely cause hangs, since it means programs using
   `compare_exchange_weak` cannot make progress.
+* `-Zmiri-deterministic-floats` makes Miri's floating-point behavior fully deterministic. This means
+  that operations will always return the preferred NaN, imprecise operations will not have any
+  random error applied to them, and `min`/`max` and "maybe fused" multiply-add all behave
+  deterministically. Note that Miri still uses host floats for some operations, so behavior can
+  still differ depending on the host target and setup. See `-Zmiri-no-extra-rounding-error` for
+  a flag that specifically only disables the random error.
 * `-Zmiri-disable-alignment-check` disables checking pointer alignment, so you
   can focus on other failures, but it means Miri can miss bugs in your program.
   Using this flag is **unsound**.
diff --git a/src/tools/miri/cargo-miri/Cargo.lock b/src/tools/miri/cargo-miri/Cargo.lock
index d37f8750bde..b3f5dafab64 100644
--- a/src/tools/miri/cargo-miri/Cargo.lock
+++ b/src/tools/miri/cargo-miri/Cargo.lock
@@ -3,31 +3,28 @@
 version = 4
 
 [[package]]
-name = "aho-corasick"
-version = "1.1.3"
+name = "anyhow"
+version = "1.0.98"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
-dependencies = [
- "memchr",
-]
+checksum = "e16d2d3311acee920a9eb8d33b8cbc1787ce4a264e85f964c2404b969bdcd487"
 
 [[package]]
-name = "anyhow"
-version = "1.0.97"
+name = "autocfg"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcfed56ad506cb2c684a14971b8861fdc3baaaae314b9e5f9bb532cbe3ba7a4f"
+checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
 
 [[package]]
 name = "bitflags"
-version = "2.9.0"
+version = "2.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c8214115b7bf84099f1309324e63141d4c5d7cc26862f97a0a857dbefe165bd"
+checksum = "1b8e56985ec62d17e9c1001dc89c88ecd7dc08e47eba5ec7c29c7b5eeecde967"
 
 [[package]]
 name = "camino"
-version = "1.1.9"
+version = "1.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b96ec4966b5813e2c0507c1f86115c8c5abaadc3980879c3424042a02fd1ad3"
+checksum = "0da45bc31171d8d6960122e222a67740df867c1dd53b4d51caa297084c185cab"
 dependencies = [
  "serde",
 ]
@@ -47,21 +44,38 @@ dependencies = [
 
 [[package]]
 name = "cargo-platform"
-version = "0.1.9"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e35af189006b9c0f00a064685c727031e3ed2d8020f7ba284d78cc2671bd36ea"
+checksum = "84982c6c0ae343635a3a4ee6dedef965513735c8b183caa7289fa6e27399ebd4"
 dependencies = [
  "serde",
 ]
 
 [[package]]
+name = "cargo-util-schemas"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7dc1a6f7b5651af85774ae5a34b4e8be397d9cf4bc063b7e6dbd99a841837830"
+dependencies = [
+ "semver",
+ "serde",
+ "serde-untagged",
+ "serde-value",
+ "thiserror",
+ "toml",
+ "unicode-xid",
+ "url",
+]
+
+[[package]]
 name = "cargo_metadata"
-version = "0.19.2"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd5eb614ed4c27c5d706420e4320fbe3216ab31fa1c33cd8246ac36dae4479ba"
+checksum = "5cfca2aaa699835ba88faf58a06342a314a950d2b9686165e038286c30316868"
 dependencies = [
  "camino",
  "cargo-platform",
+ "cargo-util-schemas",
  "semver",
  "serde",
  "serde_json",
@@ -70,9 +84,9 @@ dependencies = [
 
 [[package]]
 name = "cfg-if"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+checksum = "9555578bc9e57714c812a1f84e4fc5b4d21fcb063490c624de019f7464c91268"
 
 [[package]]
 name = "directories"
@@ -92,17 +106,44 @@ dependencies = [
  "libc",
  "option-ext",
  "redox_users",
- "windows-sys",
+ "windows-sys 0.60.2",
+]
+
+[[package]]
+name = "displaydoc"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97369cbbc041bc366949bc74d34658d6cda5621039731c6310521892a3a20ae0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "equivalent"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
+
+[[package]]
+name = "erased-serde"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e004d887f51fcb9fef17317a2f3525c887d8aa3f4f50fed920816a688284a5b7"
+dependencies = [
+ "serde",
+ "typeid",
 ]
 
 [[package]]
 name = "errno"
-version = "0.3.11"
+version = "0.3.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "976dd42dc7e85965fe702eb8164f21f450704bdde31faefd6471dba214cb594e"
+checksum = "778e2ac28f6c47af28e4907f13ffd1e1ddbd400980a9abd7c8df189bf578a5ad"
 dependencies = [
  "libc",
- "windows-sys",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -112,21 +153,30 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
 [[package]]
+name = "form_urlencoded"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e13624c2627564efccf4934284bdd98cbaa14e79b0b5a141218e507b3a823456"
+dependencies = [
+ "percent-encoding",
+]
+
+[[package]]
 name = "getrandom"
-version = "0.2.15"
+version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
+checksum = "335ff9f135e4384c8150d6f27c6daed433577f86b4750418338c01a1a2528592"
 dependencies = [
  "cfg-if",
  "libc",
- "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasi 0.11.1+wasi-snapshot-preview1",
 ]
 
 [[package]]
 name = "getrandom"
-version = "0.3.2"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73fea8450eea4bac3940448fb7ae50d91f034f941199fcd9d909a5a07aa455f0"
+checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
 dependencies = [
  "cfg-if",
  "libc",
@@ -135,6 +185,129 @@ dependencies = [
 ]
 
 [[package]]
+name = "hashbrown"
+version = "0.15.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5971ac85611da7067dbfcabef3c70ebb5606018acd9e2a3903a0da507521e0d5"
+
+[[package]]
+name = "icu_collections"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "200072f5d0e3614556f94a9930d5dc3e0662a652823904c3a75dc3b0af7fee47"
+dependencies = [
+ "displaydoc",
+ "potential_utf",
+ "yoke",
+ "zerofrom",
+ "zerovec",
+]
+
+[[package]]
+name = "icu_locale_core"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0cde2700ccaed3872079a65fb1a78f6c0a36c91570f28755dda67bc8f7d9f00a"
+dependencies = [
+ "displaydoc",
+ "litemap",
+ "tinystr",
+ "writeable",
+ "zerovec",
+]
+
+[[package]]
+name = "icu_normalizer"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "436880e8e18df4d7bbc06d58432329d6458cc84531f7ac5f024e93deadb37979"
+dependencies = [
+ "displaydoc",
+ "icu_collections",
+ "icu_normalizer_data",
+ "icu_properties",
+ "icu_provider",
+ "smallvec",
+ "zerovec",
+]
+
+[[package]]
+name = "icu_normalizer_data"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00210d6893afc98edb752b664b8890f0ef174c8adbb8d0be9710fa66fbbf72d3"
+
+[[package]]
+name = "icu_properties"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "016c619c1eeb94efb86809b015c58f479963de65bdb6253345c1a1276f22e32b"
+dependencies = [
+ "displaydoc",
+ "icu_collections",
+ "icu_locale_core",
+ "icu_properties_data",
+ "icu_provider",
+ "potential_utf",
+ "zerotrie",
+ "zerovec",
+]
+
+[[package]]
+name = "icu_properties_data"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "298459143998310acd25ffe6810ed544932242d3f07083eee1084d83a71bd632"
+
+[[package]]
+name = "icu_provider"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "03c80da27b5f4187909049ee2d72f276f0d9f99a42c306bd0131ecfe04d8e5af"
+dependencies = [
+ "displaydoc",
+ "icu_locale_core",
+ "stable_deref_trait",
+ "tinystr",
+ "writeable",
+ "yoke",
+ "zerofrom",
+ "zerotrie",
+ "zerovec",
+]
+
+[[package]]
+name = "idna"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "686f825264d630750a544639377bae737628043f20d38bbc029e8f29ea968a7e"
+dependencies = [
+ "idna_adapter",
+ "smallvec",
+ "utf8_iter",
+]
+
+[[package]]
+name = "idna_adapter"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3acae9609540aa318d1bc588455225fb2085b9ed0c4f6bd0d9d5bcd86f1a0344"
+dependencies = [
+ "icu_normalizer",
+ "icu_properties",
+]
+
+[[package]]
+name = "indexmap"
+version = "2.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fe4cd85333e22411419a0bcae1297d25e58c9443848b11dc6a86fefe8c78a661"
+dependencies = [
+ "equivalent",
+ "hashbrown",
+]
+
+[[package]]
 name = "itoa"
 version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -142,15 +315,15 @@ checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
 
 [[package]]
 name = "libc"
-version = "0.2.171"
+version = "0.2.174"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c19937216e9d3aa9956d9bb8dfc0b0c8beb6058fc4f7a4dc4d850edf86a237d6"
+checksum = "1171693293099992e19cddea4e8b849964e9846f4acee11b3948bcc337be8776"
 
 [[package]]
 name = "libredox"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0ff37bd590ca25063e35af745c343cb7a0271906fb7b37e4813e8f79f00268d"
+checksum = "1580801010e535496706ba011c15f8532df6b42297d2e471fec38ceadd8c0638"
 dependencies = [
  "bitflags",
  "libc",
@@ -158,15 +331,30 @@ dependencies = [
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.9.3"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe7db12097d22ec582439daf8618b8fdd1a7bef6270e9af3b1ebcd30893cf413"
+checksum = "cd945864f07fe9f5371a27ad7b52a172b4b499999f1d97574c9fa68373937e12"
+
+[[package]]
+name = "litemap"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "241eaef5fd12c88705a01fc1066c48c4b36e0dd4377dcdc7ec3942cea7a69956"
 
 [[package]]
 name = "memchr"
-version = "2.7.4"
+version = "2.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+checksum = "32a282da65faaf38286cf3be983213fcf1d2e2a58700e808f83f4ea9a4804bc0"
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
 
 [[package]]
 name = "once_cell"
@@ -181,10 +369,34 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
 
 [[package]]
+name = "ordered-float"
+version = "2.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68f19d67e5a2795c94e73e0bb1cc1a7edeb2e28efd39e2e1c9b7a40c1108b11c"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "percent-encoding"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
+
+[[package]]
+name = "potential_utf"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5a7c30837279ca13e7c867e9e40053bc68740f988cb07f7ca6df43cc734b585"
+dependencies = [
+ "zerovec",
+]
+
+[[package]]
 name = "proc-macro2"
-version = "1.0.94"
+version = "1.0.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a31971752e70b8b2686d7e46ec17fb38dad4051d94024c88df49b667caea9c84"
+checksum = "02b3e5e68a3a1a02aad3ec490a98007cbc13c37cbe84a3cd7b8e406d76e7f778"
 dependencies = [
  "unicode-ident",
 ]
@@ -200,9 +412,9 @@ dependencies = [
 
 [[package]]
 name = "r-efi"
-version = "5.2.0"
+version = "5.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74765f6d916ee2faa39bc8e68e4f3ed8949b48cccdac59983d287a7cb71ce9c5"
+checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
 
 [[package]]
 name = "redox_users"
@@ -210,50 +422,21 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd6f9d3d47bdd2ad6945c5015a226ec6155d0bcdfd8f7cd29f86b71f8de99d2b"
 dependencies = [
- "getrandom 0.2.15",
+ "getrandom 0.2.16",
  "libredox",
  "thiserror",
 ]
 
 [[package]]
-name = "regex"
-version = "1.11.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b544ef1b4eac5dc2db33ea63606ae9ffcfac26c1416a2806ae0bf5f56b201191"
-dependencies = [
- "aho-corasick",
- "memchr",
- "regex-automata",
- "regex-syntax",
-]
-
-[[package]]
-name = "regex-automata"
-version = "0.4.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "809e8dc61f6de73b46c85f4c96486310fe304c434cfa43669d7b40f711150908"
-dependencies = [
- "aho-corasick",
- "memchr",
- "regex-syntax",
-]
-
-[[package]]
-name = "regex-syntax"
-version = "0.8.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
-
-[[package]]
 name = "rustc-build-sysroot"
-version = "0.5.8"
+version = "0.5.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "16d115ad7e26e0d1337f64ae6598f758194696afc2e9f34c8a6f24582529c3dc"
+checksum = "fdb13874a0e55baf4ac3d49d38206aecb31a55b75d6c4d04fd850b53942c8cc8"
 dependencies = [
  "anyhow",
- "regex",
  "rustc_version",
  "tempfile",
+ "toml",
  "walkdir",
 ]
 
@@ -274,15 +457,15 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "1.0.5"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d97817398dd4bb2e6da002002db259209759911da105da92bec29ccb12cf58bf"
+checksum = "11181fbabf243db407ef8df94a6ce0b2f9a733bd8be4ad02b4eda9602296cac8"
 dependencies = [
  "bitflags",
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -319,6 +502,27 @@ dependencies = [
 ]
 
 [[package]]
+name = "serde-untagged"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "299d9c19d7d466db4ab10addd5703e4c615dec2a5a16dbbafe191045e87ee66e"
+dependencies = [
+ "erased-serde",
+ "serde",
+ "typeid",
+]
+
+[[package]]
+name = "serde-value"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3a1a3341211875ef120e117ea7fd5228530ae7e7036a779fdc9117be6b3282c"
+dependencies = [
+ "ordered-float",
+ "serde",
+]
+
+[[package]]
 name = "serde_derive"
 version = "1.0.219"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -331,9 +535,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.140"
+version = "1.0.141"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
+checksum = "30b9eff21ebe718216c6ec64e1d9ac57087aad11efc64e32002bce4a0d4c03d3"
 dependencies = [
  "itoa",
  "memchr",
@@ -342,10 +546,31 @@ dependencies = [
 ]
 
 [[package]]
+name = "serde_spanned"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf41e0cfaf7226dca15e8197172c295a782857fcb97fad1808a166870dee75a3"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "smallvec"
+version = "1.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
+
+[[package]]
+name = "stable_deref_trait"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
+
+[[package]]
 name = "syn"
-version = "2.0.100"
+version = "2.0.104"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
+checksum = "17b6f705963418cdb9927482fa304bc562ece2fdd4f616084c50b7023b435a40"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -353,16 +578,27 @@ dependencies = [
 ]
 
 [[package]]
+name = "synstructure"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "728a70f3dbaf5bab7f0c4b1ac8d7ae5ea60a4b5549c8a5914361c99147a709d2"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
 name = "tempfile"
-version = "3.19.1"
+version = "3.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7437ac7763b9b123ccf33c338a5cc1bac6f69b45a136c19bdd8a65e3916435bf"
+checksum = "e8a64e3985349f2441a1a9ef0b853f869006c3855f2cda6862a94d26ebb9d6a1"
 dependencies = [
  "fastrand",
- "getrandom 0.3.2",
+ "getrandom 0.3.3",
  "once_cell",
  "rustix",
- "windows-sys",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -386,12 +622,93 @@ dependencies = [
 ]
 
 [[package]]
+name = "tinystr"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d4f6d1145dcb577acf783d4e601bc1d76a13337bb54e6233add580b07344c8b"
+dependencies = [
+ "displaydoc",
+ "zerovec",
+]
+
+[[package]]
+name = "toml"
+version = "0.8.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc1beb996b9d83529a9e75c17a1686767d148d70663143c7854d8b4a09ced362"
+dependencies = [
+ "indexmap",
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_edit",
+]
+
+[[package]]
+name = "toml_datetime"
+version = "0.6.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22cddaf88f4fbc13c51aebbf5f8eceb5c7c5a9da2ac40a13519eb5b0a0e8f11c"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "toml_edit"
+version = "0.22.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41fe8c660ae4257887cf66394862d21dbca4a6ddd26f04a3560410406a2f819a"
+dependencies = [
+ "indexmap",
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_write",
+ "winnow",
+]
+
+[[package]]
+name = "toml_write"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d99f8c9a7727884afe522e9bd5edbfc91a3312b36a77b5fb8926e4c31a41801"
+
+[[package]]
+name = "typeid"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc7d623258602320d5c55d1bc22793b57daff0ec7efc270ea7d55ce1d5f5471c"
+
+[[package]]
 name = "unicode-ident"
 version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
 
 [[package]]
+name = "unicode-xid"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
+
+[[package]]
+name = "url"
+version = "2.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32f8b686cadd1473f4bd0117a5d28d36b1ade384ea9b5069a1c40aefed7fda60"
+dependencies = [
+ "form_urlencoded",
+ "idna",
+ "percent-encoding",
+]
+
+[[package]]
+name = "utf8_iter"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
+
+[[package]]
 name = "walkdir"
 version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -403,9 +720,9 @@ dependencies = [
 
 [[package]]
 name = "wasi"
-version = "0.11.0+wasi-snapshot-preview1"
+version = "0.11.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
 [[package]]
 name = "wasi"
@@ -422,7 +739,7 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
 dependencies = [
- "windows-sys",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -431,7 +748,16 @@ version = "0.59.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.52.6",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.60.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
+dependencies = [
+ "windows-targets 0.53.2",
 ]
 
 [[package]]
@@ -440,14 +766,30 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
 dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_gnullvm",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
+ "windows_aarch64_gnullvm 0.52.6",
+ "windows_aarch64_msvc 0.52.6",
+ "windows_i686_gnu 0.52.6",
+ "windows_i686_gnullvm 0.52.6",
+ "windows_i686_msvc 0.52.6",
+ "windows_x86_64_gnu 0.52.6",
+ "windows_x86_64_gnullvm 0.52.6",
+ "windows_x86_64_msvc 0.52.6",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.53.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c66f69fcc9ce11da9966ddb31a40968cad001c5bedeb5c2b82ede4253ab48aef"
+dependencies = [
+ "windows_aarch64_gnullvm 0.53.0",
+ "windows_aarch64_msvc 0.53.0",
+ "windows_i686_gnu 0.53.0",
+ "windows_i686_gnullvm 0.53.0",
+ "windows_i686_msvc 0.53.0",
+ "windows_x86_64_gnu 0.53.0",
+ "windows_x86_64_gnullvm 0.53.0",
+ "windows_x86_64_msvc 0.53.0",
 ]
 
 [[package]]
@@ -457,48 +799,105 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
 [[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86b8d5f90ddd19cb4a147a5fa63ca848db3df085e25fee3cc10b39b6eebae764"
+
+[[package]]
 name = "windows_aarch64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
 [[package]]
+name = "windows_aarch64_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7651a1f62a11b8cbd5e0d42526e55f2c99886c77e007179efff86c2b137e66c"
+
+[[package]]
 name = "windows_i686_gnu"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
 
 [[package]]
+name = "windows_i686_gnu"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1dc67659d35f387f5f6c479dc4e28f1d4bb90ddd1a5d3da2e5d97b42d6272c3"
+
+[[package]]
 name = "windows_i686_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
 [[package]]
+name = "windows_i686_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ce6ccbdedbf6d6354471319e781c0dfef054c81fbc7cf83f338a4296c0cae11"
+
+[[package]]
 name = "windows_i686_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
 [[package]]
+name = "windows_i686_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "581fee95406bb13382d2f65cd4a908ca7b1e4c2f1917f143ba16efe98a589b5d"
+
+[[package]]
 name = "windows_x86_64_gnu"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
 [[package]]
+name = "windows_x86_64_gnu"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e55b5ac9ea33f2fc1716d1742db15574fd6fc8dadc51caab1c16a3d3b4190ba"
+
+[[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
 [[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a6e035dd0599267ce1ee132e51c27dd29437f63325753051e71dd9e42406c57"
+
+[[package]]
 name = "windows_x86_64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
 [[package]]
+name = "windows_x86_64_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
+
+[[package]]
+name = "winnow"
+version = "0.7.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3edebf492c8125044983378ecb5766203ad3b4c2f7a922bd7dd207f6d443e95"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
 name = "wit-bindgen-rt"
 version = "0.39.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -506,3 +905,87 @@ checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
 dependencies = [
  "bitflags",
 ]
+
+[[package]]
+name = "writeable"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea2f10b9bb0928dfb1b42b65e1f9e36f7f54dbdf08457afefb38afcdec4fa2bb"
+
+[[package]]
+name = "yoke"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f41bb01b8226ef4bfd589436a297c53d118f65921786300e427be8d487695cc"
+dependencies = [
+ "serde",
+ "stable_deref_trait",
+ "yoke-derive",
+ "zerofrom",
+]
+
+[[package]]
+name = "yoke-derive"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38da3c9736e16c5d3c8c597a9aaa5d1fa565d0532ae05e27c24aa62fb32c0ab6"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zerofrom"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50cc42e0333e05660c3587f3bf9d0478688e15d870fab3346451ce7f8c9fbea5"
+dependencies = [
+ "zerofrom-derive",
+]
+
+[[package]]
+name = "zerofrom-derive"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d71e5d6e06ab090c67b5e44993ec16b72dcbaabc526db883a360057678b48502"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zerotrie"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36f0bbd478583f79edad978b407914f61b2972f5af6fa089686016be8f9af595"
+dependencies = [
+ "displaydoc",
+ "yoke",
+ "zerofrom",
+]
+
+[[package]]
+name = "zerovec"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a05eb080e015ba39cc9e23bbe5e7fb04d5fb040350f99f34e338d5fdd294428"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b96237efa0c878c64bd89c436f661be4e46b2f3eff1ebb976f7ef2321d2f58f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
diff --git a/src/tools/miri/cargo-miri/Cargo.toml b/src/tools/miri/cargo-miri/Cargo.toml
index e08733959cc..77cb1df8e74 100644
--- a/src/tools/miri/cargo-miri/Cargo.toml
+++ b/src/tools/miri/cargo-miri/Cargo.toml
@@ -17,7 +17,7 @@ doctest = false # and no doc tests
 directories = "6"
 rustc_version = "0.4"
 serde_json = "1.0.40"
-cargo_metadata = "0.19"
+cargo_metadata = "0.21"
 rustc-build-sysroot = "0.5.8"
 
 # Enable some feature flags that dev-dependencies need but dependencies
diff --git a/src/tools/miri/cargo-miri/src/util.rs b/src/tools/miri/cargo-miri/src/util.rs
index 43b2a1b6173..82c6a929357 100644
--- a/src/tools/miri/cargo-miri/src/util.rs
+++ b/src/tools/miri/cargo-miri/src/util.rs
@@ -129,7 +129,8 @@ pub fn exec(mut cmd: Command) -> ! {
     // On non-Unix imitate POSIX exec as closely as we can
     #[cfg(not(unix))]
     {
-        let exit_status = cmd.status().expect("failed to run command");
+        let exit_status =
+            cmd.status().unwrap_or_else(|err| panic!("failed to run `{cmd:?}`:\n{err}"));
         std::process::exit(exit_status.code().unwrap_or(-1))
     }
     // On Unix targets, actually exec.
@@ -138,8 +139,8 @@ pub fn exec(mut cmd: Command) -> ! {
     #[cfg(unix)]
     {
         use std::os::unix::process::CommandExt;
-        let error = cmd.exec();
-        panic!("failed to run command: {error}")
+        let err = cmd.exec();
+        panic!("failed to run `{cmd:?}`:\n{err}")
     }
 }
 
diff --git a/src/tools/miri/etc/rust_analyzer_helix.toml b/src/tools/miri/etc/rust_analyzer_helix.toml
index 9bfb09120d8..91e4070478c 100644
--- a/src/tools/miri/etc/rust_analyzer_helix.toml
+++ b/src/tools/miri/etc/rust_analyzer_helix.toml
@@ -26,5 +26,6 @@ invocationStrategy = "once"
 overrideCommand = [
     "./miri",
     "check",
+    "--no-default-features",
     "--message-format=json",
 ]
diff --git a/src/tools/miri/etc/rust_analyzer_vscode.json b/src/tools/miri/etc/rust_analyzer_vscode.json
index c646953e92b..6917c6a1fd8 100644
--- a/src/tools/miri/etc/rust_analyzer_vscode.json
+++ b/src/tools/miri/etc/rust_analyzer_vscode.json
@@ -20,6 +20,7 @@
     "rust-analyzer.cargo.buildScripts.overrideCommand": [
         "./miri",
         "check",
+        "--no-default-features",
         "--message-format=json",
     ],
 }
diff --git a/src/tools/miri/miri b/src/tools/miri/miri
index 549998ae44a..a5f2bb1550a 100755
--- a/src/tools/miri/miri
+++ b/src/tools/miri/miri
@@ -15,8 +15,9 @@ if [ -n "$MIRI_IN_RA" ]; then
   CARGO_FLAGS+=("--message-format=json" "-Zroot-dir=$ROOT_DIR")
   TARGET_DIR="$ROOT_DIR"/target
 fi
+
 # Run cargo.
-cargo $TOOLCHAIN build --manifest-path "$ROOT_DIR"/miri-script/Cargo.toml \
+${CARGO:-cargo} $TOOLCHAIN build --manifest-path "$ROOT_DIR"/miri-script/Cargo.toml \
   --target-dir "$TARGET_DIR" "${CARGO_FLAGS[@]}" || \
   ( echo "Failed to build miri-script. Is the 'stable' toolchain installed?"; exit 1 )
 # Instead of doing just `cargo run --manifest-path .. $@`, we invoke miri-script binary directly.
diff --git a/src/tools/miri/miri-script/Cargo.lock b/src/tools/miri/miri-script/Cargo.lock
index 3494a241ec5..a049bfcbccd 100644
--- a/src/tools/miri/miri-script/Cargo.lock
+++ b/src/tools/miri/miri-script/Cargo.lock
@@ -4,9 +4,9 @@ version = 4
 
 [[package]]
 name = "anstream"
-version = "0.6.18"
+version = "0.6.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8acc5369981196006228e28809f761875c0327210a891e941f4c683b3a99529b"
+checksum = "301af1932e46185686725e0fad2f8f2aa7da69dd70bf6ecc44d6b703844a3933"
 dependencies = [
  "anstyle",
  "anstyle-parse",
@@ -19,62 +19,62 @@ dependencies = [
 
 [[package]]
 name = "anstyle"
-version = "1.0.10"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55cc3b69f167a1ef2e161439aa98aed94e6028e5f9a59be9a6ffb47aef1651f9"
+checksum = "862ed96ca487e809f1c8e5a8447f6ee2cf102f846893800b20cebdf541fc6bbd"
 
 [[package]]
 name = "anstyle-parse"
-version = "0.2.6"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b2d16507662817a6a20a9ea92df6652ee4f94f914589377d69f3b21bc5798a9"
+checksum = "4e7644824f0aa2c7b9384579234ef10eb7efb6a0deb83f9630a49594dd9c15c2"
 dependencies = [
  "utf8parse",
 ]
 
 [[package]]
 name = "anstyle-query"
-version = "1.1.2"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "79947af37f4177cfead1110013d678905c37501914fba0efea834c3fe9a8d60c"
+checksum = "6c8bdeb6047d8983be085bab0ba1472e6dc604e7041dbf6fcd5e71523014fae9"
 dependencies = [
- "windows-sys",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
 name = "anstyle-wincon"
-version = "3.0.7"
+version = "3.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca3534e77181a9cc07539ad51f2141fe32f6c3ffd4df76db8ad92346b003ae4e"
+checksum = "403f75924867bb1033c59fbf0797484329750cfbe3c4325cd33127941fabc882"
 dependencies = [
  "anstyle",
- "once_cell",
- "windows-sys",
+ "once_cell_polyfill",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
 name = "anyhow"
-version = "1.0.97"
+version = "1.0.98"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcfed56ad506cb2c684a14971b8861fdc3baaaae314b9e5f9bb532cbe3ba7a4f"
+checksum = "e16d2d3311acee920a9eb8d33b8cbc1787ce4a264e85f964c2404b969bdcd487"
 
 [[package]]
 name = "bitflags"
-version = "2.9.0"
+version = "2.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c8214115b7bf84099f1309324e63141d4c5d7cc26862f97a0a857dbefe165bd"
+checksum = "1b8e56985ec62d17e9c1001dc89c88ecd7dc08e47eba5ec7c29c7b5eeecde967"
 
 [[package]]
 name = "cfg-if"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+checksum = "9555578bc9e57714c812a1f84e4fc5b4d21fcb063490c624de019f7464c91268"
 
 [[package]]
 name = "clap"
-version = "4.5.35"
+version = "4.5.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8aa86934b44c19c50f87cc2790e19f54f7a67aedb64101c2e1a2e5ecfb73944"
+checksum = "be92d32e80243a54711e5d7ce823c35c41c9d929dc4ab58e1276f625841aadf9"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -82,9 +82,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.35"
+version = "4.5.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2414dbb2dd0695280da6ea9261e327479e9d37b0630f6b53ba2a11c60c679fd9"
+checksum = "707eab41e9622f9139419d573eca0900137718000c517d47da73045f54331c3d"
 dependencies = [
  "anstream",
  "anstyle",
@@ -94,9 +94,9 @@ dependencies = [
 
 [[package]]
 name = "clap_derive"
-version = "4.5.32"
+version = "4.5.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09176aae279615badda0765c0c0b3f6ed53f4709118af73cf4655d85d1530cd7"
+checksum = "ef4f52386a59ca4c860f7393bcf8abd8dfd91ecccc0f774635ff68e92eeef491"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -106,15 +106,15 @@ dependencies = [
 
 [[package]]
 name = "clap_lex"
-version = "0.7.4"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f46ad14479a25103f283c0f10005961cf086d8dc42205bb44c46ac563475dca6"
+checksum = "b94f61472cee1439c0b966b47e3aca9ae07e45d070759512cd390ea2bebc6675"
 
 [[package]]
 name = "colorchoice"
-version = "1.0.3"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b63caa9aa9397e2d9480a9b13673856c78d8ac123288526c37d7839f2a86990"
+checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75"
 
 [[package]]
 name = "directories"
@@ -134,7 +134,7 @@ dependencies = [
  "libc",
  "option-ext",
  "redox_users",
- "windows-sys",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -150,19 +150,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
 
 [[package]]
-name = "env_home"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7f84e12ccf0a7ddc17a6c41c93326024c42920d7ee630d04950e6926645c0fe"
-
-[[package]]
 name = "errno"
-version = "0.3.11"
+version = "0.3.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "976dd42dc7e85965fe702eb8164f21f450704bdde31faefd6471dba214cb594e"
+checksum = "778e2ac28f6c47af28e4907f13ffd1e1ddbd400980a9abd7c8df189bf578a5ad"
 dependencies = [
  "libc",
- "windows-sys",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -173,20 +167,20 @@ checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
 [[package]]
 name = "getrandom"
-version = "0.2.15"
+version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
+checksum = "335ff9f135e4384c8150d6f27c6daed433577f86b4750418338c01a1a2528592"
 dependencies = [
  "cfg-if",
  "libc",
- "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasi 0.11.1+wasi-snapshot-preview1",
 ]
 
 [[package]]
 name = "getrandom"
-version = "0.3.2"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73fea8450eea4bac3940448fb7ae50d91f034f941199fcd9d909a5a07aa455f0"
+checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
 dependencies = [
  "cfg-if",
  "libc",
@@ -223,15 +217,15 @@ checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
 
 [[package]]
 name = "libc"
-version = "0.2.171"
+version = "0.2.174"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c19937216e9d3aa9956d9bb8dfc0b0c8beb6058fc4f7a4dc4d850edf86a237d6"
+checksum = "1171693293099992e19cddea4e8b849964e9846f4acee11b3948bcc337be8776"
 
 [[package]]
 name = "libredox"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0ff37bd590ca25063e35af745c343cb7a0271906fb7b37e4813e8f79f00268d"
+checksum = "1580801010e535496706ba011c15f8532df6b42297d2e471fec38ceadd8c0638"
 dependencies = [
  "bitflags",
  "libc",
@@ -239,21 +233,15 @@ dependencies = [
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.4.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d26c52dbd32dccf2d10cac7725f8eae5296885fb5703b261f7d0a0739ec807ab"
-
-[[package]]
-name = "linux-raw-sys"
-version = "0.9.3"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe7db12097d22ec582439daf8618b8fdd1a7bef6270e9af3b1ebcd30893cf413"
+checksum = "cd945864f07fe9f5371a27ad7b52a172b4b499999f1d97574c9fa68373937e12"
 
 [[package]]
 name = "memchr"
-version = "2.7.4"
+version = "2.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+checksum = "32a282da65faaf38286cf3be983213fcf1d2e2a58700e808f83f4ea9a4804bc0"
 
 [[package]]
 name = "miri-script"
@@ -272,7 +260,6 @@ dependencies = [
  "shell-words",
  "tempfile",
  "walkdir",
- "which",
  "xshell",
 ]
 
@@ -283,6 +270,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
 
 [[package]]
+name = "once_cell_polyfill"
+version = "1.70.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4895175b425cb1f87721b59f0f286c2092bd4af812243672510e1ac53e2e0ad"
+
+[[package]]
 name = "option-ext"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -296,9 +289,9 @@ checksum = "a6e819bbd49d5939f682638fa54826bf1650abddcd65d000923de8ad63cc7d15"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.94"
+version = "1.0.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a31971752e70b8b2686d7e46ec17fb38dad4051d94024c88df49b667caea9c84"
+checksum = "02b3e5e68a3a1a02aad3ec490a98007cbc13c37cbe84a3cd7b8e406d76e7f778"
 dependencies = [
  "unicode-ident",
 ]
@@ -314,9 +307,9 @@ dependencies = [
 
 [[package]]
 name = "r-efi"
-version = "5.2.0"
+version = "5.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74765f6d916ee2faa39bc8e68e4f3ed8949b48cccdac59983d287a7cb71ce9c5"
+checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
 
 [[package]]
 name = "redox_users"
@@ -324,7 +317,7 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd6f9d3d47bdd2ad6945c5015a226ec6155d0bcdfd8f7cd29f86b71f8de99d2b"
 dependencies = [
- "getrandom 0.2.15",
+ "getrandom 0.2.16",
  "libredox",
  "thiserror",
 ]
@@ -340,28 +333,15 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.38.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fdb5bc1ae2baa591800df16c9ca78619bf65c0488b41b96ccec5d11220d8c154"
-dependencies = [
- "bitflags",
- "errno",
- "libc",
- "linux-raw-sys 0.4.15",
- "windows-sys",
-]
-
-[[package]]
-name = "rustix"
-version = "1.0.5"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d97817398dd4bb2e6da002002db259209759911da105da92bec29ccb12cf58bf"
+checksum = "11181fbabf243db407ef8df94a6ce0b2f9a733bd8be4ad02b4eda9602296cac8"
 dependencies = [
  "bitflags",
  "errno",
  "libc",
- "linux-raw-sys 0.9.3",
- "windows-sys",
+ "linux-raw-sys",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -407,9 +387,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.140"
+version = "1.0.141"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
+checksum = "30b9eff21ebe718216c6ec64e1d9ac57087aad11efc64e32002bce4a0d4c03d3"
 dependencies = [
  "itoa",
  "memchr",
@@ -431,9 +411,9 @@ checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
 [[package]]
 name = "syn"
-version = "2.0.100"
+version = "2.0.104"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
+checksum = "17b6f705963418cdb9927482fa304bc562ece2fdd4f616084c50b7023b435a40"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -442,15 +422,15 @@ dependencies = [
 
 [[package]]
 name = "tempfile"
-version = "3.19.1"
+version = "3.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7437ac7763b9b123ccf33c338a5cc1bac6f69b45a136c19bdd8a65e3916435bf"
+checksum = "e8a64e3985349f2441a1a9ef0b853f869006c3855f2cda6862a94d26ebb9d6a1"
 dependencies = [
  "fastrand",
- "getrandom 0.3.2",
+ "getrandom 0.3.3",
  "once_cell",
- "rustix 1.0.5",
- "windows-sys",
+ "rustix",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -497,9 +477,9 @@ dependencies = [
 
 [[package]]
 name = "wasi"
-version = "0.11.0+wasi-snapshot-preview1"
+version = "0.11.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
 [[package]]
 name = "wasi"
@@ -511,24 +491,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "which"
-version = "7.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2774c861e1f072b3aadc02f8ba886c26ad6321567ecc294c935434cad06f1283"
-dependencies = [
- "either",
- "env_home",
- "rustix 0.38.44",
- "winsafe",
-]
-
-[[package]]
 name = "winapi-util"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
 dependencies = [
- "windows-sys",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -537,7 +505,16 @@ version = "0.59.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.52.6",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.60.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
+dependencies = [
+ "windows-targets 0.53.2",
 ]
 
 [[package]]
@@ -546,14 +523,30 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
 dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_gnullvm",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
+ "windows_aarch64_gnullvm 0.52.6",
+ "windows_aarch64_msvc 0.52.6",
+ "windows_i686_gnu 0.52.6",
+ "windows_i686_gnullvm 0.52.6",
+ "windows_i686_msvc 0.52.6",
+ "windows_x86_64_gnu 0.52.6",
+ "windows_x86_64_gnullvm 0.52.6",
+ "windows_x86_64_msvc 0.52.6",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.53.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c66f69fcc9ce11da9966ddb31a40968cad001c5bedeb5c2b82ede4253ab48aef"
+dependencies = [
+ "windows_aarch64_gnullvm 0.53.0",
+ "windows_aarch64_msvc 0.53.0",
+ "windows_i686_gnu 0.53.0",
+ "windows_i686_gnullvm 0.53.0",
+ "windows_i686_msvc 0.53.0",
+ "windows_x86_64_gnu 0.53.0",
+ "windows_x86_64_gnullvm 0.53.0",
+ "windows_x86_64_msvc 0.53.0",
 ]
 
 [[package]]
@@ -563,52 +556,94 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
 [[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86b8d5f90ddd19cb4a147a5fa63ca848db3df085e25fee3cc10b39b6eebae764"
+
+[[package]]
 name = "windows_aarch64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
 [[package]]
+name = "windows_aarch64_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7651a1f62a11b8cbd5e0d42526e55f2c99886c77e007179efff86c2b137e66c"
+
+[[package]]
 name = "windows_i686_gnu"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
 
 [[package]]
+name = "windows_i686_gnu"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1dc67659d35f387f5f6c479dc4e28f1d4bb90ddd1a5d3da2e5d97b42d6272c3"
+
+[[package]]
 name = "windows_i686_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
 [[package]]
+name = "windows_i686_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ce6ccbdedbf6d6354471319e781c0dfef054c81fbc7cf83f338a4296c0cae11"
+
+[[package]]
 name = "windows_i686_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
 [[package]]
+name = "windows_i686_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "581fee95406bb13382d2f65cd4a908ca7b1e4c2f1917f143ba16efe98a589b5d"
+
+[[package]]
 name = "windows_x86_64_gnu"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
 [[package]]
+name = "windows_x86_64_gnu"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e55b5ac9ea33f2fc1716d1742db15574fd6fc8dadc51caab1c16a3d3b4190ba"
+
+[[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
 [[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a6e035dd0599267ce1ee132e51c27dd29437f63325753051e71dd9e42406c57"
+
+[[package]]
 name = "windows_x86_64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
 [[package]]
-name = "winsafe"
-version = "0.0.19"
+name = "windows_x86_64_msvc"
+version = "0.53.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d135d17ab770252ad95e9a872d365cf3090e3be864a34ab46f48555993efc904"
+checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
 
 [[package]]
 name = "wit-bindgen-rt"
diff --git a/src/tools/miri/miri-script/Cargo.toml b/src/tools/miri/miri-script/Cargo.toml
index 462a9cc62bf..b3f82cd1d50 100644
--- a/src/tools/miri/miri-script/Cargo.toml
+++ b/src/tools/miri/miri-script/Cargo.toml
@@ -7,13 +7,13 @@ repository = "https://github.com/rust-lang/miri"
 version = "0.1.0"
 default-run = "miri-script"
 edition = "2024"
+rust-version = "1.85"
 
 [workspace]
 # We make this a workspace root so that cargo does not go looking in ../Cargo.toml for the workspace root.
 # This is needed to make this package build on stable when the parent package uses unstable cargo features.
 
 [dependencies]
-which = "7"
 walkdir = "2.3"
 itertools = "0.14"
 path_macro = "1.0"
diff --git a/src/tools/miri/miri-script/src/commands.rs b/src/tools/miri/miri-script/src/commands.rs
index e948beef004..9aaad9ca04a 100644
--- a/src/tools/miri/miri-script/src/commands.rs
+++ b/src/tools/miri/miri-script/src/commands.rs
@@ -198,9 +198,6 @@ impl Command {
     }
 
     fn toolchain(flags: Vec<String>) -> Result<()> {
-        // Make sure rustup-toolchain-install-master is installed.
-        which::which("rustup-toolchain-install-master")
-            .context("Please install rustup-toolchain-install-master by running 'cargo install rustup-toolchain-install-master'")?;
         let sh = Shell::new()?;
         sh.change_dir(miri_dir()?);
         let new_commit = sh.read_file("rust-version")?.trim().to_owned();
@@ -227,7 +224,9 @@ impl Command {
         // Install and setup new toolchain.
         cmd!(sh, "rustup toolchain uninstall miri").run()?;
 
-        cmd!(sh, "rustup-toolchain-install-master -n miri -c cargo -c rust-src -c rustc-dev -c llvm-tools -c rustfmt -c clippy {flags...} -- {new_commit}").run()?;
+        cmd!(sh, "rustup-toolchain-install-master -n miri -c cargo -c rust-src -c rustc-dev -c llvm-tools -c rustfmt -c clippy {flags...} -- {new_commit}")
+            .run()
+            .context("Failed to run rustup-toolchain-install-master. If it is not installed, run 'cargo install rustup-toolchain-install-master'.")?;
         cmd!(sh, "rustup override set miri").run()?;
         // Cleanup.
         cmd!(sh, "cargo clean").run()?;
@@ -702,7 +701,6 @@ impl Command {
         let mut early_flags = Vec::<OsString>::new();
 
         // In `dep` mode, the target is already passed via `MIRI_TEST_TARGET`
-        #[expect(clippy::collapsible_if)] // we need to wait until this is stable
         if !dep {
             if let Some(target) = &target {
                 early_flags.push("--target".into());
@@ -735,7 +733,6 @@ impl Command {
         // Add Miri flags
         let mut cmd = cmd.args(&miri_flags).args(&early_flags).args(&flags);
         // For `--dep` we also need to set the target in the env var.
-        #[expect(clippy::collapsible_if)] // we need to wait until this is stable
         if dep {
             if let Some(target) = &target {
                 cmd = cmd.env("MIRI_TEST_TARGET", target);
diff --git a/src/tools/miri/miri-script/src/main.rs b/src/tools/miri/miri-script/src/main.rs
index 673d658cf1d..e41df662ca2 100644
--- a/src/tools/miri/miri-script/src/main.rs
+++ b/src/tools/miri/miri-script/src/main.rs
@@ -75,7 +75,7 @@ pub enum Command {
     ///
     /// Also respects MIRIFLAGS environment variable.
     Run {
-        /// Build the program with the dependencies declared in `test_dependencies/Cargo.toml`.
+        /// Build the program with the dependencies declared in `tests/deps/Cargo.toml`.
         #[arg(long)]
         dep: bool,
         /// Show build progress.
diff --git a/src/tools/miri/miri-script/src/util.rs b/src/tools/miri/miri-script/src/util.rs
index c100cf195ba..6121096f823 100644
--- a/src/tools/miri/miri-script/src/util.rs
+++ b/src/tools/miri/miri-script/src/util.rs
@@ -38,6 +38,8 @@ pub struct MiriEnv {
     pub miri_dir: PathBuf,
     /// active_toolchain is passed as `+toolchain` argument to cargo/rustc invocations.
     toolchain: String,
+    /// The cargo binary to use.
+    cargo_bin: String,
     /// Extra flags to pass to cargo.
     cargo_extra_flags: Vec<String>,
     /// The rustc sysroot
@@ -106,6 +108,9 @@ impl MiriEnv {
             sh.set_var("PATH", new_path);
         }
 
+        // Get the cargo binary to use, if one is set.
+        let cargo_bin = std::env::var("CARGO").unwrap_or_else(|_| "cargo".to_string());
+
         // Get extra flags for cargo.
         let cargo_extra_flags = std::env::var("CARGO_EXTRA_FLAGS").unwrap_or_default();
         let mut cargo_extra_flags = flagsplit(&cargo_extra_flags);
@@ -119,7 +124,7 @@ impl MiriEnv {
         // Also set `-Zroot-dir` for cargo, to print diagnostics relative to the miri dir.
         cargo_extra_flags.push(format!("-Zroot-dir={}", miri_dir.display()));
 
-        Ok(MiriEnv { miri_dir, toolchain, sh, sysroot, cargo_extra_flags, libdir })
+        Ok(MiriEnv { miri_dir, toolchain, sh, sysroot, cargo_bin, cargo_extra_flags, libdir })
     }
 
     /// Make sure the `features` you pass here exist for the specified `crate_dir`. For example, the
@@ -130,12 +135,12 @@ impl MiriEnv {
         cmd: &str,
         features: &[String],
     ) -> Cmd<'_> {
-        let MiriEnv { toolchain, cargo_extra_flags, .. } = self;
+        let MiriEnv { toolchain, cargo_extra_flags, cargo_bin, .. } = self;
         let manifest_path = path!(self.miri_dir / crate_dir.as_ref() / "Cargo.toml");
         let features = features_to_args(features);
         cmd!(
             self.sh,
-            "cargo +{toolchain} {cmd} {cargo_extra_flags...} --manifest-path {manifest_path} {features...}"
+            "{cargo_bin} +{toolchain} {cmd} {cargo_extra_flags...} --manifest-path {manifest_path} {features...}"
         )
     }
 
@@ -147,12 +152,12 @@ impl MiriEnv {
         features: &[String],
         args: impl IntoIterator<Item = impl AsRef<OsStr>>,
     ) -> Result<()> {
-        let MiriEnv { sysroot, toolchain, cargo_extra_flags, .. } = self;
+        let MiriEnv { sysroot, toolchain, cargo_extra_flags, cargo_bin, .. } = self;
         let path = path!(self.miri_dir / crate_dir.as_ref());
         let features = features_to_args(features);
         // Install binaries to the miri toolchain's `sysroot` so they do not interact with other toolchains.
         // (Not using `cargo_cmd` as `install` is special and doesn't use `--manifest-path`.)
-        cmd!(self.sh, "cargo +{toolchain} install {cargo_extra_flags...} --path {path} --force --root {sysroot} {features...} {args...}").run()?;
+        cmd!(self.sh, "{cargo_bin} +{toolchain} install {cargo_extra_flags...} --path {path} --force --root {sysroot} {features...} {args...}").run()?;
         Ok(())
     }
 
diff --git a/src/tools/miri/rust-version b/src/tools/miri/rust-version
index 0130cf13a45..d734ec333a5 100644
--- a/src/tools/miri/rust-version
+++ b/src/tools/miri/rust-version
@@ -1 +1 @@
-733b47ea4b1b86216f14ef56e49440c33933f230
+6707bf0f59485cf054ac1095725df43220e4be20
diff --git a/src/tools/miri/src/alloc/alloc_bytes.rs b/src/tools/miri/src/alloc/alloc_bytes.rs
index 2a253952b27..5d00d3eafcb 100644
--- a/src/tools/miri/src/alloc/alloc_bytes.rs
+++ b/src/tools/miri/src/alloc/alloc_bytes.rs
@@ -1,20 +1,18 @@
 use std::alloc::Layout;
 use std::borrow::Cow;
+use std::cell::RefCell;
+use std::rc::Rc;
 use std::{alloc, slice};
-#[cfg(target_os = "linux")]
-use std::{cell::RefCell, rc::Rc};
 
 use rustc_abi::{Align, Size};
 use rustc_middle::mir::interpret::AllocBytes;
 
-#[cfg(target_os = "linux")]
 use crate::alloc::isolated_alloc::IsolatedAlloc;
 use crate::helpers::ToU64 as _;
 
 #[derive(Clone, Debug)]
 pub enum MiriAllocParams {
     Global,
-    #[cfg(target_os = "linux")]
     Isolated(Rc<RefCell<IsolatedAlloc>>),
 }
 
@@ -56,7 +54,6 @@ impl Drop for MiriAllocBytes {
         unsafe {
             match self.params.clone() {
                 MiriAllocParams::Global => alloc::dealloc(self.ptr, alloc_layout),
-                #[cfg(target_os = "linux")]
                 MiriAllocParams::Isolated(alloc) =>
                     alloc.borrow_mut().dealloc(self.ptr, alloc_layout),
             }
@@ -123,7 +120,6 @@ impl AllocBytes for MiriAllocBytes {
         let alloc_fn = |layout, params: &MiriAllocParams| unsafe {
             match params {
                 MiriAllocParams::Global => alloc::alloc(layout),
-                #[cfg(target_os = "linux")]
                 MiriAllocParams::Isolated(alloc) => alloc.borrow_mut().alloc(layout),
             }
         };
@@ -144,7 +140,6 @@ impl AllocBytes for MiriAllocBytes {
         let alloc_fn = |layout, params: &MiriAllocParams| unsafe {
             match params {
                 MiriAllocParams::Global => alloc::alloc_zeroed(layout),
-                #[cfg(target_os = "linux")]
                 MiriAllocParams::Isolated(alloc) => alloc.borrow_mut().alloc_zeroed(layout),
             }
         };
diff --git a/src/tools/miri/src/alloc/isolated_alloc.rs b/src/tools/miri/src/alloc/isolated_alloc.rs
index a7bb9b4da75..1745727b16b 100644
--- a/src/tools/miri/src/alloc/isolated_alloc.rs
+++ b/src/tools/miri/src/alloc/isolated_alloc.rs
@@ -1,7 +1,6 @@
 use std::alloc::Layout;
 use std::ptr::NonNull;
 
-use nix::sys::mman;
 use rustc_index::bit_set::DenseBitSet;
 
 /// How many bytes of memory each bit in the bitset represents.
@@ -44,6 +43,10 @@ impl IsolatedAlloc {
         }
     }
 
+    pub fn page_size(&self) -> usize {
+        self.page_size
+    }
+
     /// For simplicity, we serve small allocations in multiples of COMPRESSION_FACTOR
     /// bytes with at least that alignment.
     #[inline]
@@ -302,53 +305,11 @@ impl IsolatedAlloc {
         }
     }
 
-    /// Returns a vector of page addresses managed by the allocator.
-    pub fn pages(&self) -> Vec<usize> {
-        let mut pages: Vec<usize> =
-            self.page_ptrs.iter().map(|p| p.expose_provenance().get()).collect();
-        for (ptr, size) in self.huge_ptrs.iter() {
-            for i in 0..size / self.page_size {
-                pages.push(ptr.expose_provenance().get().strict_add(i * self.page_size));
-            }
-        }
-        pages
-    }
-
-    /// Protects all owned memory as `PROT_NONE`, preventing accesses.
-    ///
-    /// SAFETY: Accessing memory after this point will result in a segfault
-    /// unless it is first unprotected.
-    pub unsafe fn prepare_ffi(&mut self) -> Result<(), nix::errno::Errno> {
-        let prot = mman::ProtFlags::PROT_NONE;
-        unsafe { self.mprotect(prot) }
-    }
-
-    /// Deprotects all owned memory by setting it to RW. Erroring here is very
-    /// likely unrecoverable, so it may panic if applying those permissions
-    /// fails.
-    pub fn unprep_ffi(&mut self) {
-        let prot = mman::ProtFlags::PROT_READ | mman::ProtFlags::PROT_WRITE;
-        unsafe {
-            self.mprotect(prot).unwrap();
-        }
-    }
-
-    /// Applies `prot` to every page managed by the allocator.
-    ///
-    /// SAFETY: Accessing memory in violation of the protection flags will
-    /// trigger a segfault.
-    unsafe fn mprotect(&mut self, prot: mman::ProtFlags) -> Result<(), nix::errno::Errno> {
-        for &pg in &self.page_ptrs {
-            unsafe {
-                mman::mprotect(pg.cast(), self.page_size, prot)?;
-            }
-        }
-        for &(hpg, size) in &self.huge_ptrs {
-            unsafe {
-                mman::mprotect(hpg.cast(), size.next_multiple_of(self.page_size), prot)?;
-            }
-        }
-        Ok(())
+    /// Returns a list of page ranges managed by the allocator, given in terms of pointers
+    /// and size (in bytes).
+    pub fn pages(&self) -> impl Iterator<Item = (NonNull<u8>, usize)> {
+        let pages = self.page_ptrs.iter().map(|&p| (p, self.page_size));
+        pages.chain(self.huge_ptrs.iter().copied())
     }
 }
 
diff --git a/src/tools/miri/src/alloc/mod.rs b/src/tools/miri/src/alloc/mod.rs
index 3be885920d2..35158f50a8f 100644
--- a/src/tools/miri/src/alloc/mod.rs
+++ b/src/tools/miri/src/alloc/mod.rs
@@ -1,5 +1,31 @@
 mod alloc_bytes;
-#[cfg(target_os = "linux")]
+#[cfg(all(unix, feature = "native-lib"))]
 pub mod isolated_alloc;
+#[cfg(not(all(unix, feature = "native-lib")))]
+pub mod isolated_alloc {
+    use std::alloc::Layout;
+
+    /// Stub allocator to avoid `cfg`s in the rest of Miri.
+    #[derive(Debug)]
+    pub struct IsolatedAlloc(!);
+
+    impl IsolatedAlloc {
+        pub fn new() -> Self {
+            unreachable!()
+        }
+
+        pub unsafe fn alloc(&mut self, _layout: Layout) -> *mut u8 {
+            match self.0 {}
+        }
+
+        pub unsafe fn alloc_zeroed(&mut self, _layout: Layout) -> *mut u8 {
+            match self.0 {}
+        }
+
+        pub unsafe fn dealloc(&mut self, _ptr: *mut u8, _layout: Layout) {
+            match self.0 {}
+        }
+    }
+}
 
 pub use self::alloc_bytes::{MiriAllocBytes, MiriAllocParams};
diff --git a/src/tools/miri/src/alloc_addresses/mod.rs b/src/tools/miri/src/alloc_addresses/mod.rs
index 3cc38fa087c..334503d2994 100644
--- a/src/tools/miri/src/alloc_addresses/mod.rs
+++ b/src/tools/miri/src/alloc_addresses/mod.rs
@@ -116,14 +116,6 @@ trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
         let this = self.eval_context_ref();
         let info = this.get_alloc_info(alloc_id);
 
-        // Miri's address assignment leaks state across thread boundaries, which is incompatible
-        // with GenMC execution. So we instead let GenMC assign addresses to allocations.
-        if let Some(genmc_ctx) = this.machine.data_race.as_genmc_ref() {
-            let addr = genmc_ctx.handle_alloc(&this.machine, info.size, info.align, memory_kind)?;
-            return interp_ok(addr);
-        }
-
-        let mut rng = this.machine.rng.borrow_mut();
         // This is either called immediately after allocation (and then cached), or when
         // adjusting `tcx` pointers (which never get freed). So assert that we are looking
         // at a live allocation. This also ensures that we never re-assign an address to an
@@ -131,6 +123,19 @@ trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
         // information was removed.
         assert!(!matches!(info.kind, AllocKind::Dead));
 
+        // TypeId allocations always have a "base address" of 0 (i.e., the relative offset is the
+        // hash fragment and therefore equal to the actual integer value).
+        if matches!(info.kind, AllocKind::TypeId) {
+            return interp_ok(0);
+        }
+
+        // Miri's address assignment leaks state across thread boundaries, which is incompatible
+        // with GenMC execution. So we instead let GenMC assign addresses to allocations.
+        if let Some(genmc_ctx) = this.machine.data_race.as_genmc_ref() {
+            let addr = genmc_ctx.handle_alloc(&this.machine, info.size, info.align, memory_kind)?;
+            return interp_ok(addr);
+        }
+
         // This allocation does not have a base address yet, pick or reuse one.
         if !this.machine.native_lib.is_empty() {
             // In native lib mode, we use the "real" address of the bytes for this allocation.
@@ -169,12 +174,13 @@ trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
                     std::mem::forget(alloc_bytes);
                     ptr
                 }
-                AllocKind::Dead => unreachable!(),
+                AllocKind::TypeId | AllocKind::Dead => unreachable!(),
             };
             // We don't have to expose this pointer yet, we do that in `prepare_for_native_call`.
             return interp_ok(base_ptr.addr().to_u64());
         }
         // We are not in native lib mode, so we control the addresses ourselves.
+        let mut rng = this.machine.rng.borrow_mut();
         if let Some((reuse_addr, clock)) = global_state.reuse.take_addr(
             &mut *rng,
             info.size,
@@ -295,21 +301,25 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
                 // Store address in cache.
                 global_state.base_addr.try_insert(alloc_id, base_addr).unwrap();
 
-                // Also maintain the opposite mapping in `int_to_ptr_map`, ensuring we keep it sorted.
-                // We have a fast-path for the common case that this address is bigger than all previous ones.
-                let pos = if global_state
-                    .int_to_ptr_map
-                    .last()
-                    .is_some_and(|(last_addr, _)| *last_addr < base_addr)
-                {
-                    global_state.int_to_ptr_map.len()
-                } else {
-                    global_state
+                // Also maintain the opposite mapping in `int_to_ptr_map`, ensuring we keep it
+                // sorted. We have a fast-path for the common case that this address is bigger than
+                // all previous ones. We skip this for allocations at address 0; those can't be
+                // real, they must be TypeId "fake allocations".
+                if base_addr != 0 {
+                    let pos = if global_state
                         .int_to_ptr_map
-                        .binary_search_by_key(&base_addr, |(addr, _)| *addr)
-                        .unwrap_err()
-                };
-                global_state.int_to_ptr_map.insert(pos, (base_addr, alloc_id));
+                        .last()
+                        .is_some_and(|(last_addr, _)| *last_addr < base_addr)
+                    {
+                        global_state.int_to_ptr_map.len()
+                    } else {
+                        global_state
+                            .int_to_ptr_map
+                            .binary_search_by_key(&base_addr, |(addr, _)| *addr)
+                            .unwrap_err()
+                    };
+                    global_state.int_to_ptr_map.insert(pos, (base_addr, alloc_id));
+                }
 
                 interp_ok(base_addr)
             }
diff --git a/src/tools/miri/src/bin/log/tracing_chrome.rs b/src/tools/miri/src/bin/log/tracing_chrome.rs
index 459acea6f0b..5a96633c99e 100644
--- a/src/tools/miri/src/bin/log/tracing_chrome.rs
+++ b/src/tools/miri/src/bin/log/tracing_chrome.rs
@@ -1,8 +1,18 @@
 // SPDX-License-Identifier: MIT
 // SPDX-FileCopyrightText: Copyright (c) 2020 Thoren Paulson
-//! This file is taken unmodified from the following link, except for file attributes and
-//! `extern crate` at the top.
-//! https://github.com/thoren-d/tracing-chrome/blob/7e2625ab4aeeef2f0ef9bde9d6258dd181c04472/src/lib.rs
+//! This file was initially taken from the following link:
+//! <https://github.com/thoren-d/tracing-chrome/blob/7e2625ab4aeeef2f0ef9bde9d6258dd181c04472/src/lib.rs>
+//!
+//! The precise changes that were made to the original file can be found in git history
+//! (`git log -- path/to/tracing_chrome.rs`), but in summary:
+//! - the file attributes were changed and `extern crate` was added at the top
+//! - if a tracing span has a field called "tracing_separate_thread", it will be given a separate
+//! span ID even in [TraceStyle::Threaded] mode, to make it appear on a separate line when viewing
+//! the trace in <https://ui.perfetto.dev>. This is the syntax to trigger this behavior:
+//!   ```rust
+//!   tracing::info_span!("my_span", tracing_separate_thread = tracing::field::Empty, /* ... */)
+//!   ```
+//!
 //! Depending on the tracing-chrome crate from crates.io is unfortunately not possible, since it
 //! depends on `tracing_core` which conflicts with rustc_private's `tracing_core` (meaning it would
 //! not be possible to use the [ChromeLayer] in a context that expects a [Layer] from
@@ -79,14 +89,26 @@ where
 }
 
 /// Decides how traces will be recorded.
+/// Also see <https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview#heading=h.jh64i9l3vwa1>
 #[derive(Default)]
 pub enum TraceStyle {
-    /// Traces will be recorded as a group of threads.
+    /// Traces will be recorded as a group of threads, and all spans on the same thread will appear
+    /// on a single trace line in <https://ui.perfetto.dev>.
     /// In this style, spans should be entered and exited on the same thread.
+    ///
+    /// If a tracing span has a field called "tracing_separate_thread", it will be given a separate
+    /// span ID even in this mode, to make it appear on a separate line when viewing the trace in
+    /// <https://ui.perfetto.dev>. This is the syntax to trigger this behavior:
+    /// ```rust
+    /// tracing::info_span!("my_span", tracing_separate_thread = tracing::field::Empty, /* ... */)
+    /// ```
+    /// [tracing::field::Empty] is used so that other tracing layers (e.g. the logger) will ignore
+    /// the "tracing_separate_thread" argument and not print out anything for it.
     #[default]
     Threaded,
 
-    /// Traces will recorded as a group of asynchronous operations.
+    /// Traces will recorded as a group of asynchronous operations. All spans will be given separate
+    /// span IDs and will appear on separate trace lines in <https://ui.perfetto.dev>.
     Async,
 }
 
@@ -497,31 +519,39 @@ where
         }
     }
 
-    fn get_root_id(span: SpanRef<S>) -> u64 {
-        span.scope()
-            .from_root()
-            .take(1)
-            .next()
-            .unwrap_or(span)
-            .id()
-            .into_u64()
+    fn get_root_id(&self, span: SpanRef<S>) -> Option<u64> {
+        match self.trace_style {
+            TraceStyle::Threaded => {
+                if span.fields().field("tracing_separate_thread").is_some() {
+                    // assign an independent "id" to spans with argument "tracing_separate_thread",
+                    // so they appear a separate trace line in trace visualization tools, see
+                    // https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview#heading=h.jh64i9l3vwa1
+                    Some(span.id().into_u64())
+                } else {
+                    None
+                }
+            },
+            TraceStyle::Async => Some(
+                span.scope()
+                    .from_root()
+                    .take(1)
+                    .next()
+                    .unwrap_or(span)
+                    .id()
+                    .into_u64()
+            ),
+        }
     }
 
     fn enter_span(&self, span: SpanRef<S>, ts: f64) {
         let callsite = self.get_callsite(EventOrSpan::Span(&span));
-        let root_id = match self.trace_style {
-            TraceStyle::Async => Some(ChromeLayer::get_root_id(span)),
-            _ => None,
-        };
+        let root_id = self.get_root_id(span);
         self.send_message(Message::Enter(ts, callsite, root_id));
     }
 
     fn exit_span(&self, span: SpanRef<S>, ts: f64) {
         let callsite = self.get_callsite(EventOrSpan::Span(&span));
-        let root_id = match self.trace_style {
-            TraceStyle::Async => Some(ChromeLayer::get_root_id(span)),
-            _ => None,
-        };
+        let root_id = self.get_root_id(span);
         self.send_message(Message::Exit(ts, callsite, root_id));
     }
 
diff --git a/src/tools/miri/src/bin/miri.rs b/src/tools/miri/src/bin/miri.rs
index e3b579a4ac6..89fa980ff64 100644
--- a/src/tools/miri/src/bin/miri.rs
+++ b/src/tools/miri/src/bin/miri.rs
@@ -233,8 +233,6 @@ impl rustc_driver::Callbacks for MiriCompilerCalls {
         } else {
             let return_code = miri::eval_entry(tcx, entry_def_id, entry_type, &config, None)
                 .unwrap_or_else(|| {
-                    //#[cfg(target_os = "linux")]
-                    //miri::native_lib::register_retcode_sv(rustc_driver::EXIT_FAILURE);
                     tcx.dcx().abort_if_errors();
                     rustc_driver::EXIT_FAILURE
                 });
@@ -337,6 +335,10 @@ impl rustc_driver::Callbacks for MiriBeRustCompilerCalls {
 fn exit(exit_code: i32) -> ! {
     // Drop the tracing guard before exiting, so tracing calls are flushed correctly.
     deinit_loggers();
+    // Make sure the supervisor knows about the exit code.
+    #[cfg(all(unix, feature = "native-lib"))]
+    miri::native_lib::register_retcode_sv(exit_code);
+    // Actually exit.
     std::process::exit(exit_code);
 }
 
@@ -355,6 +357,11 @@ fn run_compiler_and_exit(
     args: &[String],
     callbacks: &mut (dyn rustc_driver::Callbacks + Send),
 ) -> ! {
+    // Install the ctrlc handler that sets `rustc_const_eval::CTRL_C_RECEIVED`, even if
+    // MIRI_BE_RUSTC is set. We do this late so that when `native_lib::init_sv` is called,
+    // there are no other threads.
+    rustc_driver::install_ctrlc_handler();
+
     // Invoke compiler, catch any unwinding panics and handle return code.
     let exit_code =
         rustc_driver::catch_with_exit_code(move || rustc_driver::run_compiler(args, callbacks));
@@ -439,10 +446,6 @@ fn main() {
     let args = rustc_driver::catch_fatal_errors(|| rustc_driver::args::raw_args(&early_dcx))
         .unwrap_or_else(|_| std::process::exit(rustc_driver::EXIT_FAILURE));
 
-    // Install the ctrlc handler that sets `rustc_const_eval::CTRL_C_RECEIVED`, even if
-    // MIRI_BE_RUSTC is set.
-    rustc_driver::install_ctrlc_handler();
-
     // If the environment asks us to actually be rustc, then do that.
     if let Some(crate_kind) = env::var_os("MIRI_BE_RUSTC") {
         // Earliest rustc setup.
@@ -559,6 +562,8 @@ fn main() {
             miri_config.force_intrinsic_fallback = true;
         } else if arg == "-Zmiri-deterministic-floats" {
             miri_config.float_nondet = false;
+        } else if arg == "-Zmiri-no-extra-rounding-error" {
+            miri_config.float_rounding_error = false;
         } else if arg == "-Zmiri-strict-provenance" {
             miri_config.provenance_mode = ProvenanceMode::Strict;
         } else if arg == "-Zmiri-permissive-provenance" {
@@ -750,15 +755,15 @@ fn main() {
 
     debug!("rustc arguments: {:?}", rustc_args);
     debug!("crate arguments: {:?}", miri_config.args);
-    #[cfg(target_os = "linux")]
     if !miri_config.native_lib.is_empty() && miri_config.native_lib_enable_tracing {
-        // FIXME: This should display a diagnostic / warning on error
-        // SAFETY: If any other threads exist at this point (namely for the ctrlc
-        // handler), they will not interact with anything on the main rustc/Miri
-        // thread in an async-signal-unsafe way such as by accessing shared
-        // semaphores, etc.; the handler only calls `sleep()` and `exit()`, which
-        // are async-signal-safe, as is accessing atomics
-        //let _ = unsafe { miri::native_lib::init_sv() };
+        // SAFETY: No other threads are running
+        #[cfg(all(unix, feature = "native-lib"))]
+        if unsafe { miri::native_lib::init_sv() }.is_err() {
+            eprintln!(
+                "warning: The native-lib tracer could not be started. Is this an x86 Linux system, and does Miri have permissions to ptrace?\n\
+                Falling back to non-tracing native-lib mode."
+            );
+        }
     }
     run_compiler_and_exit(
         &rustc_args,
diff --git a/src/tools/miri/src/borrow_tracker/mod.rs b/src/tools/miri/src/borrow_tracker/mod.rs
index 36c61053a32..ec6c2c60ca9 100644
--- a/src/tools/miri/src/borrow_tracker/mod.rs
+++ b/src/tools/miri/src/borrow_tracker/mod.rs
@@ -260,6 +260,7 @@ impl GlobalStateInner {
         kind: MemoryKind,
         machine: &MiriMachine<'_>,
     ) -> AllocState {
+        let _span = enter_trace_span!(borrow_tracker::new_allocation, ?id, ?alloc_size, ?kind);
         match self.borrow_tracker_method {
             BorrowTrackerMethod::StackedBorrows =>
                 AllocState::StackedBorrows(Box::new(RefCell::new(Stacks::new_allocation(
@@ -280,6 +281,7 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
         kind: RetagKind,
         val: &ImmTy<'tcx>,
     ) -> InterpResult<'tcx, ImmTy<'tcx>> {
+        let _span = enter_trace_span!(borrow_tracker::retag_ptr_value, ?kind, ?val.layout);
         let this = self.eval_context_mut();
         let method = this.machine.borrow_tracker.as_ref().unwrap().borrow().borrow_tracker_method;
         match method {
@@ -293,6 +295,7 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
         kind: RetagKind,
         place: &PlaceTy<'tcx>,
     ) -> InterpResult<'tcx> {
+        let _span = enter_trace_span!(borrow_tracker::retag_place_contents, ?kind, ?place);
         let this = self.eval_context_mut();
         let method = this.machine.borrow_tracker.as_ref().unwrap().borrow().borrow_tracker_method;
         match method {
@@ -302,6 +305,7 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
     }
 
     fn protect_place(&mut self, place: &MPlaceTy<'tcx>) -> InterpResult<'tcx, MPlaceTy<'tcx>> {
+        let _span = enter_trace_span!(borrow_tracker::protect_place, ?place);
         let this = self.eval_context_mut();
         let method = this.machine.borrow_tracker.as_ref().unwrap().borrow().borrow_tracker_method;
         match method {
@@ -311,6 +315,8 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
     }
 
     fn expose_tag(&self, alloc_id: AllocId, tag: BorTag) -> InterpResult<'tcx> {
+        let _span =
+            enter_trace_span!(borrow_tracker::expose_tag, alloc_id = alloc_id.0, tag = tag.0);
         let this = self.eval_context_ref();
         let method = this.machine.borrow_tracker.as_ref().unwrap().borrow().borrow_tracker_method;
         match method {
@@ -354,6 +360,7 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
         &self,
         frame: &Frame<'tcx, Provenance, FrameExtra<'tcx>>,
     ) -> InterpResult<'tcx> {
+        let _span = enter_trace_span!(borrow_tracker::on_stack_pop);
         let this = self.eval_context_ref();
         let borrow_tracker = this.machine.borrow_tracker.as_ref().unwrap();
         // The body of this loop needs `borrow_tracker` immutably
@@ -431,6 +438,7 @@ impl AllocState {
         range: AllocRange,
         machine: &MiriMachine<'tcx>,
     ) -> InterpResult<'tcx> {
+        let _span = enter_trace_span!(borrow_tracker::before_memory_read, alloc_id = alloc_id.0);
         match self {
             AllocState::StackedBorrows(sb) =>
                 sb.borrow_mut().before_memory_read(alloc_id, prov_extra, range, machine),
@@ -452,6 +460,7 @@ impl AllocState {
         range: AllocRange,
         machine: &MiriMachine<'tcx>,
     ) -> InterpResult<'tcx> {
+        let _span = enter_trace_span!(borrow_tracker::before_memory_write, alloc_id = alloc_id.0);
         match self {
             AllocState::StackedBorrows(sb) =>
                 sb.get_mut().before_memory_write(alloc_id, prov_extra, range, machine),
@@ -473,6 +482,8 @@ impl AllocState {
         size: Size,
         machine: &MiriMachine<'tcx>,
     ) -> InterpResult<'tcx> {
+        let _span =
+            enter_trace_span!(borrow_tracker::before_memory_deallocation, alloc_id = alloc_id.0);
         match self {
             AllocState::StackedBorrows(sb) =>
                 sb.get_mut().before_memory_deallocation(alloc_id, prov_extra, size, machine),
@@ -482,6 +493,7 @@ impl AllocState {
     }
 
     pub fn remove_unreachable_tags(&self, tags: &FxHashSet<BorTag>) {
+        let _span = enter_trace_span!(borrow_tracker::remove_unreachable_tags);
         match self {
             AllocState::StackedBorrows(sb) => sb.borrow_mut().remove_unreachable_tags(tags),
             AllocState::TreeBorrows(tb) => tb.borrow_mut().remove_unreachable_tags(tags),
@@ -496,6 +508,11 @@ impl AllocState {
         tag: BorTag,
         alloc_id: AllocId, // diagnostics
     ) -> InterpResult<'tcx> {
+        let _span = enter_trace_span!(
+            borrow_tracker::release_protector,
+            alloc_id = alloc_id.0,
+            tag = tag.0
+        );
         match self {
             AllocState::StackedBorrows(_sb) => interp_ok(()),
             AllocState::TreeBorrows(tb) =>
@@ -506,6 +523,7 @@ impl AllocState {
 
 impl VisitProvenance for AllocState {
     fn visit_provenance(&self, visit: &mut VisitWith<'_>) {
+        let _span = enter_trace_span!(borrow_tracker::visit_provenance);
         match self {
             AllocState::StackedBorrows(sb) => sb.visit_provenance(visit),
             AllocState::TreeBorrows(tb) => tb.visit_provenance(visit),
diff --git a/src/tools/miri/src/borrow_tracker/stacked_borrows/mod.rs b/src/tools/miri/src/borrow_tracker/stacked_borrows/mod.rs
index b8bcacf7c99..2977efaae04 100644
--- a/src/tools/miri/src/borrow_tracker/stacked_borrows/mod.rs
+++ b/src/tools/miri/src/borrow_tracker/stacked_borrows/mod.rs
@@ -30,7 +30,7 @@ pub type AllocState = Stacks;
 #[derive(Clone, Debug)]
 pub struct Stacks {
     // Even reading memory can have effects on the stack, so we need a `RefCell` here.
-    stacks: RangeMap<Stack>,
+    stacks: DedupRangeMap<Stack>,
     /// Stores past operations on this allocation
     history: AllocHistory,
     /// The set of tags that have been exposed inside this allocation.
@@ -468,7 +468,7 @@ impl<'tcx> Stacks {
         let stack = Stack::new(item);
 
         Stacks {
-            stacks: RangeMap::new(size, stack),
+            stacks: DedupRangeMap::new(size, stack),
             history: AllocHistory::new(id, item, machine),
             exposed_tags: FxHashSet::default(),
         }
@@ -650,7 +650,7 @@ trait EvalContextPrivExt<'tcx, 'ecx>: crate::MiriInterpCxExt<'tcx> {
                         dcx.log_protector();
                     }
                 },
-                AllocKind::Function | AllocKind::VTable | AllocKind::Dead => {
+                AllocKind::Function | AllocKind::VTable | AllocKind::TypeId | AllocKind::Dead => {
                     // No stacked borrows on these allocations.
                 }
             }
@@ -1021,7 +1021,7 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
                 trace!("Stacked Borrows tag {tag:?} exposed in {alloc_id:?}");
                 alloc_extra.borrow_tracker_sb().borrow_mut().exposed_tags.insert(tag);
             }
-            AllocKind::Function | AllocKind::VTable | AllocKind::Dead => {
+            AllocKind::Function | AllocKind::VTable | AllocKind::TypeId | AllocKind::Dead => {
                 // No stacked borrows on these allocations.
             }
         }
diff --git a/src/tools/miri/src/borrow_tracker/tree_borrows/mod.rs b/src/tools/miri/src/borrow_tracker/tree_borrows/mod.rs
index a0761cb07a1..ad2a67160f4 100644
--- a/src/tools/miri/src/borrow_tracker/tree_borrows/mod.rs
+++ b/src/tools/miri/src/borrow_tracker/tree_borrows/mod.rs
@@ -314,7 +314,7 @@ trait EvalContextPrivExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
         let span = this.machine.current_span();
 
         // Store initial permissions and their corresponding range.
-        let mut perms_map: RangeMap<LocationState> = RangeMap::new(
+        let mut perms_map: DedupRangeMap<LocationState> = DedupRangeMap::new(
             ptr_size,
             LocationState::new_accessed(Permission::new_disabled(), IdempotentForeignAccess::None), // this will be overwritten
         );
@@ -673,7 +673,7 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
                 trace!("Tree Borrows tag {tag:?} exposed in {alloc_id:?}");
                 alloc_extra.borrow_tracker_tb().borrow_mut().expose_tag(tag);
             }
-            AllocKind::Function | AllocKind::VTable | AllocKind::Dead => {
+            AllocKind::Function | AllocKind::VTable | AllocKind::TypeId | AllocKind::Dead => {
                 // No tree borrows on these allocations.
             }
         }
diff --git a/src/tools/miri/src/borrow_tracker/tree_borrows/tree.rs b/src/tools/miri/src/borrow_tracker/tree_borrows/tree.rs
index 48e4a19e263..1f29bcfc2b0 100644
--- a/src/tools/miri/src/borrow_tracker/tree_borrows/tree.rs
+++ b/src/tools/miri/src/borrow_tracker/tree_borrows/tree.rs
@@ -247,7 +247,7 @@ pub struct Tree {
     /// `unwrap` any `perm.get(key)`.
     ///
     /// We do uphold the fact that `keys(perms)` is a subset of `keys(nodes)`
-    pub(super) rperms: RangeMap<UniValMap<LocationState>>,
+    pub(super) rperms: DedupRangeMap<UniValMap<LocationState>>,
     /// The index of the root node.
     pub(super) root: UniIndex,
 }
@@ -609,7 +609,7 @@ impl Tree {
                     IdempotentForeignAccess::None,
                 ),
             );
-            RangeMap::new(size, perms)
+            DedupRangeMap::new(size, perms)
         };
         Self { root: root_idx, nodes, rperms, tag_mapping }
     }
@@ -631,7 +631,7 @@ impl<'tcx> Tree {
         base_offset: Size,
         parent_tag: BorTag,
         new_tag: BorTag,
-        initial_perms: RangeMap<LocationState>,
+        initial_perms: DedupRangeMap<LocationState>,
         default_perm: Permission,
         protected: bool,
         span: Span,
diff --git a/src/tools/miri/src/concurrency/data_race.rs b/src/tools/miri/src/concurrency/data_race.rs
index b5e7e9d0ac0..38d76f5cf73 100644
--- a/src/tools/miri/src/concurrency/data_race.rs
+++ b/src/tools/miri/src/concurrency/data_race.rs
@@ -997,7 +997,7 @@ pub trait EvalContextExt<'tcx>: MiriInterpCxExt<'tcx> {
 #[derive(Debug, Clone)]
 pub struct VClockAlloc {
     /// Assigning each byte a MemoryCellClocks.
-    alloc_ranges: RefCell<RangeMap<MemoryCellClocks>>,
+    alloc_ranges: RefCell<DedupRangeMap<MemoryCellClocks>>,
 }
 
 impl VisitProvenance for VClockAlloc {
@@ -1045,7 +1045,7 @@ impl VClockAlloc {
                 (VTimestamp::ZERO, global.thread_index(ThreadId::MAIN_THREAD)),
         };
         VClockAlloc {
-            alloc_ranges: RefCell::new(RangeMap::new(
+            alloc_ranges: RefCell::new(DedupRangeMap::new(
                 len,
                 MemoryCellClocks::new(alloc_timestamp, alloc_index),
             )),
diff --git a/src/tools/miri/src/concurrency/mod.rs b/src/tools/miri/src/concurrency/mod.rs
index 49bcc0d30b5..c2ea8a00dec 100644
--- a/src/tools/miri/src/concurrency/mod.rs
+++ b/src/tools/miri/src/concurrency/mod.rs
@@ -2,7 +2,6 @@ pub mod cpu_affinity;
 pub mod data_race;
 mod data_race_handler;
 pub mod init_once;
-mod range_object_map;
 pub mod sync;
 pub mod thread;
 mod vector_clock;
diff --git a/src/tools/miri/src/concurrency/thread.rs b/src/tools/miri/src/concurrency/thread.rs
index a4e93f9222c..878afdf2517 100644
--- a/src/tools/miri/src/concurrency/thread.rs
+++ b/src/tools/miri/src/concurrency/thread.rs
@@ -186,15 +186,15 @@ pub struct Thread<'tcx> {
     /// The join status.
     join_status: ThreadJoinStatus,
 
-    /// Stack of active panic payloads for the current thread. Used for storing
-    /// the argument of the call to `miri_start_unwind` (the panic payload) when unwinding.
+    /// Stack of active unwind payloads for the current thread. Used for storing
+    /// the argument of the call to `miri_start_unwind` (the payload) when unwinding.
     /// This is pointer-sized, and matches the `Payload` type in `src/libpanic_unwind/miri.rs`.
     ///
     /// In real unwinding, the payload gets passed as an argument to the landing pad,
     /// which then forwards it to 'Resume'. However this argument is implicit in MIR,
     /// so we have to store it out-of-band. When there are multiple active unwinds,
     /// the innermost one is always caught first, so we can store them as a stack.
-    pub(crate) panic_payloads: Vec<ImmTy<'tcx>>,
+    pub(crate) unwind_payloads: Vec<ImmTy<'tcx>>,
 
     /// Last OS error location in memory. It is a 32-bit integer.
     pub(crate) last_error: Option<MPlaceTy<'tcx>>,
@@ -282,7 +282,7 @@ impl<'tcx> Thread<'tcx> {
             stack: Vec::new(),
             top_user_relevant_frame: None,
             join_status: ThreadJoinStatus::Joinable,
-            panic_payloads: Vec::new(),
+            unwind_payloads: Vec::new(),
             last_error: None,
             on_stack_empty,
         }
@@ -292,7 +292,7 @@ impl<'tcx> Thread<'tcx> {
 impl VisitProvenance for Thread<'_> {
     fn visit_provenance(&self, visit: &mut VisitWith<'_>) {
         let Thread {
-            panic_payloads: panic_payload,
+            unwind_payloads: panic_payload,
             last_error,
             stack,
             top_user_relevant_frame: _,
@@ -677,6 +677,8 @@ trait EvalContextPrivExt<'tcx>: MiriInterpCxExt<'tcx> {
     fn run_on_stack_empty(&mut self) -> InterpResult<'tcx, Poll<()>> {
         let this = self.eval_context_mut();
         // Inform GenMC that a thread has finished all user code. GenMC needs to know this for scheduling.
+        // FIXME(GenMC): Thread-local destructors *are* user code, so this is odd. Also now that we
+        // support pre-main constructors, it can get called there as well.
         if let Some(genmc_ctx) = this.machine.data_race.as_genmc_ref() {
             let thread_id = this.active_thread();
             genmc_ctx.handle_thread_stack_empty(thread_id);
diff --git a/src/tools/miri/src/concurrency/weak_memory.rs b/src/tools/miri/src/concurrency/weak_memory.rs
index 95c010be2fd..a752ef7e454 100644
--- a/src/tools/miri/src/concurrency/weak_memory.rs
+++ b/src/tools/miri/src/concurrency/weak_memory.rs
@@ -90,9 +90,9 @@ use rustc_data_structures::fx::FxHashMap;
 
 use super::AllocDataRaceHandler;
 use super::data_race::{GlobalState as DataRaceState, ThreadClockSet};
-use super::range_object_map::{AccessType, RangeObjectMap};
 use super::vector_clock::{VClock, VTimestamp, VectorIdx};
 use crate::concurrency::GlobalDataRaceHandler;
+use crate::data_structures::range_object_map::{AccessType, RangeObjectMap};
 use crate::*;
 
 pub type AllocState = StoreBufferAlloc;
diff --git a/src/tools/miri/src/range_map.rs b/src/tools/miri/src/data_structures/dedup_range_map.rs
index 29a5a8537a4..56e9883b1ca 100644
--- a/src/tools/miri/src/range_map.rs
+++ b/src/tools/miri/src/data_structures/dedup_range_map.rs
@@ -17,18 +17,18 @@ struct Elem<T> {
     data: T,
 }
 #[derive(Clone, Debug)]
-pub struct RangeMap<T> {
+pub struct DedupRangeMap<T> {
     v: Vec<Elem<T>>,
 }
 
-impl<T> RangeMap<T> {
+impl<T> DedupRangeMap<T> {
     /// Creates a new `RangeMap` for the given size, and with the given initial value used for
     /// the entire range.
     #[inline(always)]
-    pub fn new(size: Size, init: T) -> RangeMap<T> {
+    pub fn new(size: Size, init: T) -> DedupRangeMap<T> {
         let size = size.bytes();
         let v = if size > 0 { vec![Elem { range: 0..size, data: init }] } else { Vec::new() };
-        RangeMap { v }
+        DedupRangeMap { v }
     }
 
     pub fn size(&self) -> Size {
@@ -246,7 +246,7 @@ mod tests {
     use super::*;
 
     /// Query the map at every offset in the range and collect the results.
-    fn to_vec<T: Copy>(map: &RangeMap<T>, offset: u64, len: u64) -> Vec<T> {
+    fn to_vec<T: Copy>(map: &DedupRangeMap<T>, offset: u64, len: u64) -> Vec<T> {
         (offset..offset + len)
             .map(|i| {
                 map.iter(Size::from_bytes(i), Size::from_bytes(1)).next().map(|(_, &t)| t).unwrap()
@@ -256,7 +256,7 @@ mod tests {
 
     #[test]
     fn basic_insert() {
-        let mut map = RangeMap::<i32>::new(Size::from_bytes(20), -1);
+        let mut map = DedupRangeMap::<i32>::new(Size::from_bytes(20), -1);
         // Insert.
         for (_, x) in map.iter_mut(Size::from_bytes(10), Size::from_bytes(1)) {
             *x = 42;
@@ -278,7 +278,7 @@ mod tests {
 
     #[test]
     fn gaps() {
-        let mut map = RangeMap::<i32>::new(Size::from_bytes(20), -1);
+        let mut map = DedupRangeMap::<i32>::new(Size::from_bytes(20), -1);
         for (_, x) in map.iter_mut(Size::from_bytes(11), Size::from_bytes(1)) {
             *x = 42;
         }
@@ -319,26 +319,26 @@ mod tests {
     #[test]
     #[should_panic]
     fn out_of_range_iter_mut() {
-        let mut map = RangeMap::<i32>::new(Size::from_bytes(20), -1);
+        let mut map = DedupRangeMap::<i32>::new(Size::from_bytes(20), -1);
         let _ = map.iter_mut(Size::from_bytes(11), Size::from_bytes(11));
     }
 
     #[test]
     #[should_panic]
     fn out_of_range_iter() {
-        let map = RangeMap::<i32>::new(Size::from_bytes(20), -1);
+        let map = DedupRangeMap::<i32>::new(Size::from_bytes(20), -1);
         let _ = map.iter(Size::from_bytes(11), Size::from_bytes(11));
     }
 
     #[test]
     fn empty_map_iter() {
-        let map = RangeMap::<i32>::new(Size::from_bytes(0), -1);
+        let map = DedupRangeMap::<i32>::new(Size::from_bytes(0), -1);
         let _ = map.iter(Size::from_bytes(0), Size::from_bytes(0));
     }
 
     #[test]
     fn empty_map_iter_mut() {
-        let mut map = RangeMap::<i32>::new(Size::from_bytes(0), -1);
+        let mut map = DedupRangeMap::<i32>::new(Size::from_bytes(0), -1);
         let _ = map.iter_mut(Size::from_bytes(0), Size::from_bytes(0));
     }
 }
diff --git a/src/tools/miri/src/data_structures/mod.rs b/src/tools/miri/src/data_structures/mod.rs
new file mode 100644
index 00000000000..d4468bc57ea
--- /dev/null
+++ b/src/tools/miri/src/data_structures/mod.rs
@@ -0,0 +1,3 @@
+pub mod dedup_range_map;
+pub mod mono_hash_map;
+pub mod range_object_map;
diff --git a/src/tools/miri/src/mono_hash_map.rs b/src/tools/miri/src/data_structures/mono_hash_map.rs
index 220233f8ff5..220233f8ff5 100644
--- a/src/tools/miri/src/mono_hash_map.rs
+++ b/src/tools/miri/src/data_structures/mono_hash_map.rs
diff --git a/src/tools/miri/src/concurrency/range_object_map.rs b/src/tools/miri/src/data_structures/range_object_map.rs
index 4c9cf3dc635..4c9cf3dc635 100644
--- a/src/tools/miri/src/concurrency/range_object_map.rs
+++ b/src/tools/miri/src/data_structures/range_object_map.rs
diff --git a/src/tools/miri/src/eval.rs b/src/tools/miri/src/eval.rs
index 425a136dfa5..3c80e60b772 100644
--- a/src/tools/miri/src/eval.rs
+++ b/src/tools/miri/src/eval.rs
@@ -11,14 +11,14 @@ use rustc_abi::ExternAbi;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_hir::def::Namespace;
 use rustc_hir::def_id::DefId;
-use rustc_middle::ty::layout::LayoutCx;
+use rustc_middle::ty::layout::{HasTyCtxt, HasTypingEnv, LayoutCx};
 use rustc_middle::ty::{self, Ty, TyCtxt};
 use rustc_session::config::EntryFnType;
 
 use crate::concurrency::GenmcCtx;
 use crate::concurrency::thread::TlsAllocAction;
 use crate::diagnostics::report_leaks;
-use crate::shims::tls;
+use crate::shims::{global_ctor, tls};
 use crate::*;
 
 #[derive(Copy, Clone, Debug)]
@@ -170,6 +170,8 @@ pub struct MiriConfig {
     pub force_intrinsic_fallback: bool,
     /// Whether floating-point operations can behave non-deterministically.
     pub float_nondet: bool,
+    /// Whether floating-point operations can have a non-deterministic rounding error.
+    pub float_rounding_error: bool,
 }
 
 impl Default for MiriConfig {
@@ -211,14 +213,23 @@ impl Default for MiriConfig {
             fixed_scheduling: false,
             force_intrinsic_fallback: false,
             float_nondet: true,
+            float_rounding_error: true,
         }
     }
 }
 
 /// The state of the main thread. Implementation detail of `on_main_stack_empty`.
-#[derive(Default, Debug)]
+#[derive(Debug)]
 enum MainThreadState<'tcx> {
-    #[default]
+    GlobalCtors {
+        ctor_state: global_ctor::GlobalCtorState<'tcx>,
+        /// The main function to call.
+        entry_id: DefId,
+        entry_type: MiriEntryFnType,
+        /// Arguments passed to `main`.
+        argc: ImmTy<'tcx>,
+        argv: ImmTy<'tcx>,
+    },
     Running,
     TlsDtors(tls::TlsDtorsState<'tcx>),
     Yield {
@@ -234,6 +245,15 @@ impl<'tcx> MainThreadState<'tcx> {
     ) -> InterpResult<'tcx, Poll<()>> {
         use MainThreadState::*;
         match self {
+            GlobalCtors { ctor_state, entry_id, entry_type, argc, argv } => {
+                match ctor_state.on_stack_empty(this)? {
+                    Poll::Pending => {} // just keep going
+                    Poll::Ready(()) => {
+                        call_main(this, *entry_id, *entry_type, argc.clone(), argv.clone())?;
+                        *self = Running;
+                    }
+                }
+            }
             Running => {
                 *self = TlsDtors(Default::default());
             }
@@ -309,13 +329,6 @@ pub fn create_ecx<'tcx>(
         MiriMachine::new(config, layout_cx, genmc_ctx),
     );
 
-    // Some parts of initialization require a full `InterpCx`.
-    MiriMachine::late_init(&mut ecx, config, {
-        let mut state = MainThreadState::default();
-        // Cannot capture anything GC-relevant here.
-        Box::new(move |m| state.on_main_stack_empty(m))
-    })?;
-
     // Make sure we have MIR. We check MIR for some stable monomorphic function in libcore.
     let sentinel =
         helpers::try_resolve_path(tcx, &["core", "ascii", "escape_default"], Namespace::ValueNS);
@@ -326,15 +339,9 @@ pub fn create_ecx<'tcx>(
         );
     }
 
-    // Setup first stack frame.
-    let entry_instance = ty::Instance::mono(tcx, entry_id);
-
-    // First argument is constructed later, because it's skipped for `miri_start.`
-
-    // Second argument (argc): length of `config.args`.
+    // Compute argc and argv from `config.args`.
     let argc =
         ImmTy::from_int(i64::try_from(config.args.len()).unwrap(), ecx.machine.layouts.isize);
-    // Third argument (`argv`): created from `config.args`.
     let argv = {
         // Put each argument in memory, collect pointers.
         let mut argvs = Vec::<Immediate<Provenance>>::with_capacity(config.args.len());
@@ -359,7 +366,7 @@ pub fn create_ecx<'tcx>(
             ecx.write_immediate(arg, &place)?;
         }
         ecx.mark_immutable(&argvs_place);
-        // Store `argc` and `argv` for macOS `_NSGetArg{c,v}`.
+        // Store `argc` and `argv` for macOS `_NSGetArg{c,v}`, and for the GC to see them.
         {
             let argc_place =
                 ecx.allocate(ecx.machine.layouts.isize, MiriMemoryKind::Machine.into())?;
@@ -374,7 +381,7 @@ pub fn create_ecx<'tcx>(
             ecx.machine.argv = Some(argv_place.ptr());
         }
         // Store command line as UTF-16 for Windows `GetCommandLineW`.
-        {
+        if tcx.sess.target.os == "windows" {
             // Construct a command string with all the arguments.
             let cmd_utf16: Vec<u16> = args_to_utf16_command_string(config.args.iter());
 
@@ -395,11 +402,43 @@ pub fn create_ecx<'tcx>(
         ImmTy::from_immediate(imm, layout)
     };
 
+    // Some parts of initialization require a full `InterpCx`.
+    MiriMachine::late_init(&mut ecx, config, {
+        let mut main_thread_state = MainThreadState::GlobalCtors {
+            entry_id,
+            entry_type,
+            argc,
+            argv,
+            ctor_state: global_ctor::GlobalCtorState::default(),
+        };
+
+        // Cannot capture anything GC-relevant here.
+        // `argc` and `argv` *are* GC_relevant, but they also get stored in `machine.argc` and
+        // `machine.argv` so we are good.
+        Box::new(move |m| main_thread_state.on_main_stack_empty(m))
+    })?;
+
+    interp_ok(ecx)
+}
+
+// Call the entry function.
+fn call_main<'tcx>(
+    ecx: &mut MiriInterpCx<'tcx>,
+    entry_id: DefId,
+    entry_type: MiriEntryFnType,
+    argc: ImmTy<'tcx>,
+    argv: ImmTy<'tcx>,
+) -> InterpResult<'tcx, ()> {
+    let tcx = ecx.tcx();
+
+    // Setup first stack frame.
+    let entry_instance = ty::Instance::mono(tcx, entry_id);
+
     // Return place (in static memory so that it does not count as leak).
     let ret_place = ecx.allocate(ecx.machine.layouts.isize, MiriMemoryKind::Machine.into())?;
     ecx.machine.main_fn_ret_place = Some(ret_place.clone());
-    // Call start function.
 
+    // Call start function.
     match entry_type {
         MiriEntryFnType::Rustc(EntryFnType::Main { .. }) => {
             let start_id = tcx.lang_items().start_fn().unwrap_or_else(|| {
@@ -409,7 +448,7 @@ pub fn create_ecx<'tcx>(
             let main_ret_ty = main_ret_ty.no_bound_vars().unwrap();
             let start_instance = ty::Instance::try_resolve(
                 tcx,
-                typing_env,
+                ecx.typing_env(),
                 start_id,
                 tcx.mk_args(&[ty::GenericArg::from(main_ret_ty)]),
             )
@@ -427,7 +466,7 @@ pub fn create_ecx<'tcx>(
                 ExternAbi::Rust,
                 &[
                     ImmTy::from_scalar(
-                        Scalar::from_pointer(main_ptr, &ecx),
+                        Scalar::from_pointer(main_ptr, ecx),
                         // FIXME use a proper fn ptr type
                         ecx.machine.layouts.const_raw_ptr,
                     ),
@@ -450,7 +489,7 @@ pub fn create_ecx<'tcx>(
         }
     }
 
-    interp_ok(ecx)
+    interp_ok(())
 }
 
 /// Evaluates the entry function specified by `entry_id`.
diff --git a/src/tools/miri/src/helpers.rs b/src/tools/miri/src/helpers.rs
index c150dc16b07..ccfff7fa94b 100644
--- a/src/tools/miri/src/helpers.rs
+++ b/src/tools/miri/src/helpers.rs
@@ -13,7 +13,7 @@ use rustc_index::IndexVec;
 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
 use rustc_middle::middle::dependency_format::Linkage;
 use rustc_middle::middle::exported_symbols::ExportedSymbol;
-use rustc_middle::ty::layout::{FnAbiOf, LayoutOf, MaybeResult, TyAndLayout};
+use rustc_middle::ty::layout::{LayoutOf, MaybeResult, TyAndLayout};
 use rustc_middle::ty::{self, Binder, FloatTy, FnSig, IntTy, Ty, TyCtxt, UintTy};
 use rustc_session::config::CrateType;
 use rustc_span::{Span, Symbol};
@@ -1235,8 +1235,11 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
         interp_ok(())
     }
 
-    /// Lookup an array of immediates stored as a linker section of name `name`.
-    fn lookup_link_section(&mut self, name: &str) -> InterpResult<'tcx, Vec<ImmTy<'tcx>>> {
+    /// Lookup an array of immediates from any linker sections matching the provided predicate.
+    fn lookup_link_section(
+        &mut self,
+        include_name: impl Fn(&str) -> bool,
+    ) -> InterpResult<'tcx, Vec<ImmTy<'tcx>>> {
         let this = self.eval_context_mut();
         let tcx = this.tcx.tcx;
 
@@ -1247,7 +1250,7 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
             let Some(link_section) = attrs.link_section else {
                 return interp_ok(());
             };
-            if link_section.as_str() == name {
+            if include_name(link_section.as_str()) {
                 let instance = ty::Instance::mono(tcx, def_id);
                 let const_val = this.eval_global(instance).unwrap_or_else(|err| {
                     panic!(
@@ -1431,3 +1434,44 @@ impl ToU64 for usize {
         self.try_into().unwrap()
     }
 }
+
+/// This struct is needed to enforce `#[must_use]` on values produced by [enter_trace_span] even
+/// when the "tracing" feature is not enabled.
+#[must_use]
+pub struct MaybeEnteredTraceSpan {
+    #[cfg(feature = "tracing")]
+    pub _entered_span: tracing::span::EnteredSpan,
+}
+
+/// Enters a [tracing::info_span] only if the "tracing" feature is enabled, otherwise does nothing.
+/// This is like [rustc_const_eval::enter_trace_span] except that it does not depend on the
+/// [Machine] trait to check if tracing is enabled, because from the Miri codebase we can directly
+/// check whether the "tracing" feature is enabled, unlike from the rustc_const_eval codebase.
+///
+/// In addition to the syntax accepted by [tracing::span!], this macro optionally allows passing
+/// the span name (i.e. the first macro argument) in the form `NAME::SUBNAME` (without quotes) to
+/// indicate that the span has name "NAME" (usually the name of the component) and has an additional
+/// more specific name "SUBNAME" (usually the function name). The latter is passed to the [tracing]
+/// infrastructure as a span field with the name "NAME". This allows not being distracted by
+/// subnames when looking at the trace in <https://ui.perfetto.dev>, but when deeper introspection
+/// is needed within a component, it's still possible to view the subnames directly in the UI by
+/// selecting a span, clicking on the "NAME" argument on the right, and clicking on "Visualize
+/// argument values".
+/// ```rust
+/// // for example, the first will expand to the second
+/// enter_trace_span!(borrow_tracker::on_stack_pop, /* ... */)
+/// enter_trace_span!("borrow_tracker", borrow_tracker = "on_stack_pop", /* ... */)
+/// ```
+#[macro_export]
+macro_rules! enter_trace_span {
+    ($name:ident :: $subname:ident $($tt:tt)*) => {{
+        enter_trace_span!(stringify!($name), $name = %stringify!(subname) $($tt)*)
+    }};
+
+    ($($tt:tt)*) => {
+        $crate::MaybeEnteredTraceSpan {
+            #[cfg(feature = "tracing")]
+            _entered_span: tracing::info_span!($($tt)*).entered()
+        }
+    };
+}
diff --git a/src/tools/miri/src/lib.rs b/src/tools/miri/src/lib.rs
index c86e33e5185..ae70257653c 100644
--- a/src/tools/miri/src/lib.rs
+++ b/src/tools/miri/src/lib.rs
@@ -1,3 +1,4 @@
+#![feature(abort_unwind)]
 #![feature(cfg_select)]
 #![feature(rustc_private)]
 #![feature(float_gamma)]
@@ -15,6 +16,7 @@
 #![feature(unqualified_local_imports)]
 #![feature(derive_coerce_pointee)]
 #![feature(arbitrary_self_types)]
+#![feature(iter_advance_by)]
 // Configure clippy and other lints
 #![allow(
     clippy::collapsible_else_if,
@@ -75,16 +77,15 @@ mod alloc_addresses;
 mod borrow_tracker;
 mod clock;
 mod concurrency;
+mod data_structures;
 mod diagnostics;
 mod eval;
 mod helpers;
 mod intrinsics;
 mod machine;
 mod math;
-mod mono_hash_map;
 mod operator;
 mod provenance_gc;
-mod range_map;
 mod shims;
 
 // Establish a "crate-wide prelude": we often import `crate::*`.
@@ -97,10 +98,10 @@ pub use rustc_const_eval::interpret::{self, AllocMap, Provenance as _};
 use rustc_middle::{bug, span_bug};
 use tracing::{info, trace};
 
-//#[cfg(target_os = "linux")]
-//pub mod native_lib {
-//    pub use crate::shims::{init_sv, register_retcode_sv};
-//}
+#[cfg(all(unix, feature = "native-lib"))]
+pub mod native_lib {
+    pub use crate::shims::{init_sv, register_retcode_sv};
+}
 
 // Type aliases that set the provenance parameter.
 pub type Pointer = interpret::Pointer<Option<machine::Provenance>>;
@@ -132,6 +133,8 @@ pub use crate::concurrency::thread::{
     ThreadManager, TimeoutAnchor, TimeoutClock, UnblockKind,
 };
 pub use crate::concurrency::{GenmcConfig, GenmcCtx};
+pub use crate::data_structures::dedup_range_map::DedupRangeMap;
+pub use crate::data_structures::mono_hash_map::MonoHashMap;
 pub use crate::diagnostics::{
     EvalContextExt as _, NonHaltingDiagnostic, TerminationInfo, report_error,
 };
@@ -139,24 +142,25 @@ pub use crate::eval::{
     AlignmentCheck, BacktraceStyle, IsolatedOp, MiriConfig, MiriEntryFnType, RejectOpWith,
     ValidationMode, create_ecx, eval_entry,
 };
-pub use crate::helpers::{AccessKind, EvalContextExt as _, ToU64 as _, ToUsize as _};
+pub use crate::helpers::{
+    AccessKind, EvalContextExt as _, MaybeEnteredTraceSpan, ToU64 as _, ToUsize as _,
+};
 pub use crate::intrinsics::EvalContextExt as _;
 pub use crate::machine::{
     AllocExtra, DynMachineCallback, FrameExtra, MachineCallback, MemoryKind, MiriInterpCx,
     MiriInterpCxExt, MiriMachine, MiriMemoryKind, PrimitiveLayouts, Provenance, ProvenanceExtra,
 };
-pub use crate::mono_hash_map::MonoHashMap;
 pub use crate::operator::EvalContextExt as _;
 pub use crate::provenance_gc::{EvalContextExt as _, LiveAllocs, VisitProvenance, VisitWith};
-pub use crate::range_map::RangeMap;
 pub use crate::shims::EmulateItemResult;
 pub use crate::shims::env::{EnvVars, EvalContextExt as _};
 pub use crate::shims::foreign_items::{DynSym, EvalContextExt as _};
 pub use crate::shims::io_error::{EvalContextExt as _, IoError, LibcError};
 pub use crate::shims::os_str::EvalContextExt as _;
-pub use crate::shims::panic::{CatchUnwindData, EvalContextExt as _};
+pub use crate::shims::panic::EvalContextExt as _;
 pub use crate::shims::time::EvalContextExt as _;
 pub use crate::shims::tls::TlsData;
+pub use crate::shims::unwind::{CatchUnwindData, EvalContextExt as _};
 
 /// Insert rustc arguments at the beginning of the argument list that Miri wants to be
 /// set per default, for maximal validation power.
diff --git a/src/tools/miri/src/machine.rs b/src/tools/miri/src/machine.rs
index 693b8916d89..ce33c870b4b 100644
--- a/src/tools/miri/src/machine.rs
+++ b/src/tools/miri/src/machine.rs
@@ -530,7 +530,6 @@ pub struct MiriMachine<'tcx> {
     pub(crate) rng: RefCell<StdRng>,
 
     /// The allocator used for the machine's `AllocBytes` in native-libs mode.
-    #[cfg(target_os = "linux")]
     pub(crate) allocator: Option<Rc<RefCell<crate::alloc::isolated_alloc::IsolatedAlloc>>>,
 
     /// The allocation IDs to report when they are being allocated
@@ -554,9 +553,9 @@ pub struct MiriMachine<'tcx> {
     pub(crate) basic_block_count: u64,
 
     /// Handle of the optional shared object file for native functions.
-    #[cfg(unix)]
+    #[cfg(all(unix, feature = "native-lib"))]
     pub native_lib: Vec<(libloading::Library, std::path::PathBuf)>,
-    #[cfg(not(unix))]
+    #[cfg(not(all(unix, feature = "native-lib")))]
     pub native_lib: Vec<!>,
 
     /// Run a garbage collector for BorTags every N basic blocks.
@@ -603,7 +602,7 @@ pub struct MiriMachine<'tcx> {
     /// Remembers whether we already warned about an extern type with Stacked Borrows.
     pub(crate) sb_extern_type_warned: Cell<bool>,
     /// Remember whether we already warned about sharing memory with a native call.
-    #[cfg(unix)]
+    #[allow(unused)]
     pub(crate) native_call_mem_warned: Cell<bool>,
     /// Remembers which shims have already shown the warning about erroring in isolation.
     pub(crate) reject_in_isolation_warned: RefCell<FxHashSet<String>>,
@@ -618,6 +617,8 @@ pub struct MiriMachine<'tcx> {
 
     /// Whether floating-point operations can behave non-deterministically.
     pub float_nondet: bool,
+    /// Whether floating-point operations can have a non-deterministic rounding error.
+    pub float_rounding_error: bool,
 }
 
 impl<'tcx> MiriMachine<'tcx> {
@@ -718,7 +719,6 @@ impl<'tcx> MiriMachine<'tcx> {
             local_crates,
             extern_statics: FxHashMap::default(),
             rng: RefCell::new(rng),
-            #[cfg(target_os = "linux")]
             allocator: if !config.native_lib.is_empty() {
                 Some(Rc::new(RefCell::new(crate::alloc::isolated_alloc::IsolatedAlloc::new())))
             } else { None },
@@ -730,7 +730,7 @@ impl<'tcx> MiriMachine<'tcx> {
             report_progress: config.report_progress,
             basic_block_count: 0,
             monotonic_clock: MonotonicClock::new(config.isolated_op == IsolatedOp::Allow),
-            #[cfg(unix)]
+            #[cfg(all(unix, feature = "native-lib"))]
             native_lib: config.native_lib.iter().map(|lib_file_path| {
                 let host_triple = rustc_session::config::host_tuple();
                 let target_triple = tcx.sess.opts.target_triple.tuple();
@@ -752,9 +752,9 @@ impl<'tcx> MiriMachine<'tcx> {
                     lib_file_path.clone(),
                 )
             }).collect(),
-            #[cfg(not(unix))]
+            #[cfg(not(all(unix, feature = "native-lib")))]
             native_lib: config.native_lib.iter().map(|_| {
-                panic!("calling functions from native libraries via FFI is only supported on Unix")
+                panic!("calling functions from native libraries via FFI is not supported in this build of Miri")
             }).collect(),
             gc_interval: config.gc_interval,
             since_gc: 0,
@@ -771,13 +771,13 @@ impl<'tcx> MiriMachine<'tcx> {
             pthread_rwlock_sanity: Cell::new(false),
             pthread_condvar_sanity: Cell::new(false),
             sb_extern_type_warned: Cell::new(false),
-            #[cfg(unix)]
             native_call_mem_warned: Cell::new(false),
             reject_in_isolation_warned: Default::default(),
             int2ptr_warned: Default::default(),
             mangle_internal_symbol_cache: Default::default(),
             force_intrinsic_fallback: config.force_intrinsic_fallback,
             float_nondet: config.float_nondet,
+            float_rounding_error: config.float_rounding_error,
         }
     }
 
@@ -924,7 +924,6 @@ impl VisitProvenance for MiriMachine<'_> {
             backtrace_style: _,
             local_crates: _,
             rng: _,
-            #[cfg(target_os = "linux")]
             allocator: _,
             tracked_alloc_ids: _,
             track_alloc_accesses: _,
@@ -949,13 +948,13 @@ impl VisitProvenance for MiriMachine<'_> {
             pthread_rwlock_sanity: _,
             pthread_condvar_sanity: _,
             sb_extern_type_warned: _,
-            #[cfg(unix)]
             native_call_mem_warned: _,
             reject_in_isolation_warned: _,
             int2ptr_warned: _,
             mangle_internal_symbol_cache: _,
             force_intrinsic_fallback: _,
             float_nondet: _,
+            float_rounding_error: _,
         } = self;
 
         threads.visit_provenance(visit);
@@ -1014,8 +1013,6 @@ impl<'tcx> Machine<'tcx> for MiriMachine<'tcx> {
 
     const PANIC_ON_ALLOC_FAIL: bool = false;
 
-    const TRACING_ENABLED: bool = cfg!(feature = "tracing");
-
     #[inline(always)]
     fn enforce_alignment(ecx: &MiriInterpCx<'tcx>) -> bool {
         ecx.machine.check_alignment != AlignmentCheck::None
@@ -1088,7 +1085,7 @@ impl<'tcx> Machine<'tcx> for MiriMachine<'tcx> {
         ecx: &MiriInterpCx<'tcx>,
         instance: ty::Instance<'tcx>,
     ) -> InterpResult<'tcx> {
-        let attrs = ecx.tcx.codegen_fn_attrs(instance.def_id());
+        let attrs = ecx.tcx.codegen_instance_attrs(instance.def);
         if attrs
             .target_features
             .iter()
@@ -1792,7 +1789,7 @@ impl<'tcx> Machine<'tcx> for MiriMachine<'tcx> {
                 ecx.tcx.sess.opts.unstable_opts.cross_crate_inline_threshold,
                 InliningThreshold::Always
             ) || !matches!(
-                ecx.tcx.codegen_fn_attrs(instance.def_id()).inline,
+                ecx.tcx.codegen_instance_attrs(instance.def).inline,
                 InlineAttr::Never
             );
             !is_generic && !can_be_inlined
@@ -1819,13 +1816,23 @@ impl<'tcx> Machine<'tcx> for MiriMachine<'tcx> {
     fn get_default_alloc_params(&self) -> <Self::Bytes as AllocBytes>::AllocParams {
         use crate::alloc::MiriAllocParams;
 
-        #[cfg(target_os = "linux")]
         match &self.allocator {
             Some(alloc) => MiriAllocParams::Isolated(alloc.clone()),
             None => MiriAllocParams::Global,
         }
-        #[cfg(not(target_os = "linux"))]
-        MiriAllocParams::Global
+    }
+
+    fn enter_trace_span(span: impl FnOnce() -> tracing::Span) -> impl EnteredTraceSpan {
+        #[cfg(feature = "tracing")]
+        {
+            span().entered()
+        }
+        #[cfg(not(feature = "tracing"))]
+        #[expect(clippy::unused_unit)]
+        {
+            let _ = span; // so we avoid the "unused variable" warning
+            ()
+        }
     }
 }
 
diff --git a/src/tools/miri/src/math.rs b/src/tools/miri/src/math.rs
index cf16a5676d6..e9e5a1070c9 100644
--- a/src/tools/miri/src/math.rs
+++ b/src/tools/miri/src/math.rs
@@ -15,7 +15,7 @@ pub(crate) fn apply_random_float_error<F: rustc_apfloat::Float>(
     val: F,
     err_scale: i32,
 ) -> F {
-    if !ecx.machine.float_nondet {
+    if !ecx.machine.float_nondet || !ecx.machine.float_rounding_error {
         return val;
     }
 
diff --git a/src/tools/miri/src/shims/foreign_items.rs b/src/tools/miri/src/shims/foreign_items.rs
index 9ddba8c2b48..94cda57658a 100644
--- a/src/tools/miri/src/shims/foreign_items.rs
+++ b/src/tools/miri/src/shims/foreign_items.rs
@@ -237,7 +237,7 @@ trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
         let this = self.eval_context_mut();
 
         // First deal with any external C functions in linked .so file.
-        #[cfg(unix)]
+        #[cfg(all(unix, feature = "native-lib"))]
         if !this.machine.native_lib.is_empty() {
             use crate::shims::native_lib::EvalContextExt as _;
             // An Ok(false) here means that the function being called was not exported
diff --git a/src/tools/miri/src/shims/global_ctor.rs b/src/tools/miri/src/shims/global_ctor.rs
new file mode 100644
index 00000000000..c56251bbe63
--- /dev/null
+++ b/src/tools/miri/src/shims/global_ctor.rs
@@ -0,0 +1,98 @@
+//! Implement global constructors.
+
+use std::task::Poll;
+
+use rustc_abi::ExternAbi;
+use rustc_target::spec::BinaryFormat;
+
+use crate::*;
+
+#[derive(Debug, Default)]
+pub struct GlobalCtorState<'tcx>(GlobalCtorStatePriv<'tcx>);
+
+#[derive(Debug, Default)]
+enum GlobalCtorStatePriv<'tcx> {
+    #[default]
+    Init,
+    /// The list of constructor functions that we still have to call.
+    Ctors(Vec<ImmTy<'tcx>>),
+    Done,
+}
+
+impl<'tcx> GlobalCtorState<'tcx> {
+    pub fn on_stack_empty(
+        &mut self,
+        this: &mut MiriInterpCx<'tcx>,
+    ) -> InterpResult<'tcx, Poll<()>> {
+        use GlobalCtorStatePriv::*;
+        let new_state = 'new_state: {
+            match &mut self.0 {
+                Init => {
+                    let this = this.eval_context_mut();
+
+                    // Lookup constructors from the relevant magic link section.
+                    let ctors = match this.tcx.sess.target.binary_format {
+                        // Read the CRT library section on Windows.
+                        BinaryFormat::Coff =>
+                            this.lookup_link_section(|section| section == ".CRT$XCU")?,
+
+                        // Read the `__mod_init_func` section on macOS.
+                        BinaryFormat::MachO =>
+                            this.lookup_link_section(|section| {
+                                let mut parts = section.splitn(3, ',');
+                                let (segment_name, section_name, section_type) =
+                                    (parts.next(), parts.next(), parts.next());
+
+                                segment_name == Some("__DATA")
+                                    && section_name == Some("__mod_init_func")
+                                    // The `mod_init_funcs` directive ensures that the
+                                    // `S_MOD_INIT_FUNC_POINTERS` flag is set on the section. LLVM
+                                    // adds this automatically so we currently do not require it.
+                                    // FIXME: is this guaranteed LLVM behavior? If not, we shouldn't
+                                    // implicitly add it here. Also see
+                                    // <https://github.com/rust-lang/miri/pull/4459#discussion_r2200115629>.
+                                    && matches!(section_type, None | Some("mod_init_funcs"))
+                            })?,
+
+                        // Read the standard `.init_array` section on platforms that use ELF, or WASM,
+                        // which supports the same linker directive.
+                        // FIXME: Add support for `.init_array.N` and `.ctors`?
+                        BinaryFormat::Elf | BinaryFormat::Wasm =>
+                            this.lookup_link_section(|section| section == ".init_array")?,
+
+                        // Other platforms have no global ctor support.
+                        _ => break 'new_state Done,
+                    };
+
+                    break 'new_state Ctors(ctors);
+                }
+                Ctors(ctors) => {
+                    if let Some(ctor) = ctors.pop() {
+                        let this = this.eval_context_mut();
+
+                        let ctor = ctor.to_scalar().to_pointer(this)?;
+                        let thread_callback = this.get_ptr_fn(ctor)?.as_instance()?;
+
+                        // The signature of this function is `unsafe extern "C" fn()`.
+                        this.call_function(
+                            thread_callback,
+                            ExternAbi::C { unwind: false },
+                            &[],
+                            None,
+                            ReturnContinuation::Stop { cleanup: true },
+                        )?;
+
+                        return interp_ok(Poll::Pending); // we stay in this state (but `ctors` got shorter)
+                    }
+
+                    // No more constructors to run.
+                    break 'new_state Done;
+                }
+                Done => return interp_ok(Poll::Ready(())),
+            }
+        };
+
+        self.0 = new_state;
+        interp_ok(Poll::Pending)
+    }
+}
diff --git a/src/tools/miri/src/shims/mod.rs b/src/tools/miri/src/shims/mod.rs
index f09fc546b3e..2a7709829ee 100644
--- a/src/tools/miri/src/shims/mod.rs
+++ b/src/tools/miri/src/shims/mod.rs
@@ -4,7 +4,7 @@ mod aarch64;
 mod alloc;
 mod backtrace;
 mod files;
-#[cfg(unix)]
+#[cfg(all(unix, feature = "native-lib"))]
 mod native_lib;
 mod unix;
 mod wasi;
@@ -14,15 +14,17 @@ mod x86;
 pub mod env;
 pub mod extern_static;
 pub mod foreign_items;
+pub mod global_ctor;
 pub mod io_error;
 pub mod os_str;
 pub mod panic;
 pub mod time;
 pub mod tls;
+pub mod unwind;
 
 pub use self::files::FdTable;
-//#[cfg(target_os = "linux")]
-//pub use self::native_lib::trace::{init_sv, register_retcode_sv};
+#[cfg(all(unix, feature = "native-lib"))]
+pub use self::native_lib::trace::{init_sv, register_retcode_sv};
 pub use self::unix::{DirTable, EpollInterestTable};
 
 /// What needs to be done after emulating an item (a shim or an intrinsic) is done.
diff --git a/src/tools/miri/src/shims/native_lib/mod.rs b/src/tools/miri/src/shims/native_lib/mod.rs
index 9b30d8ce78b..2827ed997a7 100644
--- a/src/tools/miri/src/shims/native_lib/mod.rs
+++ b/src/tools/miri/src/shims/native_lib/mod.rs
@@ -1,9 +1,5 @@
 //! Implements calling functions from a native library.
 
-// FIXME: disabled since it fails to build on many targets.
-//#[cfg(target_os = "linux")]
-//pub mod trace;
-
 use std::ops::Deref;
 
 use libffi::high::call as ffi;
@@ -12,15 +8,64 @@ use rustc_abi::{BackendRepr, HasDataLayout, Size};
 use rustc_middle::mir::interpret::Pointer;
 use rustc_middle::ty::{self as ty, IntTy, UintTy};
 use rustc_span::Symbol;
+use serde::{Deserialize, Serialize};
+
+#[cfg_attr(
+    not(all(
+        target_os = "linux",
+        target_env = "gnu",
+        any(target_arch = "x86", target_arch = "x86_64")
+    )),
+    path = "trace/stub.rs"
+)]
+pub mod trace;
 
-//#[cfg(target_os = "linux")]
-//use self::trace::Supervisor;
 use crate::*;
 
-//#[cfg(target_os = "linux")]
-//type CallResult<'tcx> = InterpResult<'tcx, (ImmTy<'tcx>, Option<self::trace::messages::MemEvents>)>;
-//#[cfg(not(target_os = "linux"))]
-type CallResult<'tcx> = InterpResult<'tcx, (ImmTy<'tcx>, Option<!>)>;
+/// The final results of an FFI trace, containing every relevant event detected
+/// by the tracer.
+#[derive(Serialize, Deserialize, Debug)]
+pub struct MemEvents {
+    /// An list of memory accesses that occurred, in the order they occurred in.
+    pub acc_events: Vec<AccessEvent>,
+}
+
+/// A single memory access.
+#[derive(Serialize, Deserialize, Clone, Debug)]
+pub enum AccessEvent {
+    /// A read occurred on this memory range.
+    Read(AccessRange),
+    /// A write may have occurred on this memory range.
+    /// Some instructions *may* write memory without *always* doing that,
+    /// so this can be an over-approximation.
+    /// The range info, however, is reliable if the access did happen.
+    /// If the second field is true, the access definitely happened.
+    Write(AccessRange, bool),
+}
+
+impl AccessEvent {
+    fn get_range(&self) -> AccessRange {
+        match self {
+            AccessEvent::Read(access_range) => access_range.clone(),
+            AccessEvent::Write(access_range, _) => access_range.clone(),
+        }
+    }
+}
+
+/// The memory touched by a given access.
+#[derive(Serialize, Deserialize, Clone, Debug)]
+pub struct AccessRange {
+    /// The base address in memory where an access occurred.
+    pub addr: usize,
+    /// The number of bytes affected from the base.
+    pub size: usize,
+}
+
+impl AccessRange {
+    fn end(&self) -> usize {
+        self.addr.strict_add(self.size)
+    }
+}
 
 impl<'tcx> EvalContextExtPriv<'tcx> for crate::MiriInterpCx<'tcx> {}
 trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
@@ -31,18 +76,17 @@ trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
         dest: &MPlaceTy<'tcx>,
         ptr: CodePtr,
         libffi_args: Vec<libffi::high::Arg<'a>>,
-    ) -> CallResult<'tcx> {
+    ) -> InterpResult<'tcx, (crate::ImmTy<'tcx>, Option<MemEvents>)> {
         let this = self.eval_context_mut();
-        //#[cfg(target_os = "linux")]
-        //let alloc = this.machine.allocator.as_ref().unwrap();
-
-        // SAFETY: We don't touch the machine memory past this point.
-        //#[cfg(target_os = "linux")]
-        //let (guard, stack_ptr) = unsafe { Supervisor::start_ffi(alloc) };
+        #[cfg(target_os = "linux")]
+        let alloc = this.machine.allocator.as_ref().unwrap();
+        #[cfg(not(target_os = "linux"))]
+        // Placeholder value.
+        let alloc = ();
 
-        // Call the function (`ptr`) with arguments `libffi_args`, and obtain the return value
-        // as the specified primitive integer type
-        let res = 'res: {
+        trace::Supervisor::do_ffi(alloc, || {
+            // Call the function (`ptr`) with arguments `libffi_args`, and obtain the return value
+            // as the specified primitive integer type
             let scalar = match dest.layout.ty.kind() {
                 // ints
                 ty::Int(IntTy::I8) => {
@@ -93,7 +137,7 @@ trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
                 // have the output_type `Tuple([])`.
                 ty::Tuple(t_list) if (*t_list).deref().is_empty() => {
                     unsafe { ffi::call::<()>(ptr, libffi_args.as_slice()) };
-                    break 'res interp_ok(ImmTy::uninit(dest.layout));
+                    return interp_ok(ImmTy::uninit(dest.layout));
                 }
                 ty::RawPtr(..) => {
                     let x = unsafe { ffi::call::<*const ()>(ptr, libffi_args.as_slice()) };
@@ -101,23 +145,14 @@ trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
                     Scalar::from_pointer(ptr, this)
                 }
                 _ =>
-                    break 'res Err(err_unsup_format!(
+                    return Err(err_unsup_format!(
                         "unsupported return type for native call: {:?}",
                         link_name
                     ))
                     .into(),
             };
             interp_ok(ImmTy::from_scalar(scalar, dest.layout))
-        };
-
-        // SAFETY: We got the guard and stack pointer from start_ffi, and
-        // the allocator is the same
-        //#[cfg(target_os = "linux")]
-        //let events = unsafe { Supervisor::end_ffi(alloc, guard, stack_ptr) };
-        //#[cfg(not(target_os = "linux"))]
-        let events = None;
-
-        interp_ok((res?, events))
+        })
     }
 
     /// Get the pointer to the function of the specified name in the shared object file,
@@ -169,6 +204,73 @@ trait EvalContextExtPriv<'tcx>: crate::MiriInterpCxExt<'tcx> {
         }
         None
     }
+
+    /// Applies the `events` to Miri's internal state. The event vector must be
+    /// ordered sequentially by when the accesses happened, and the sizes are
+    /// assumed to be exact.
+    fn tracing_apply_accesses(&mut self, events: MemEvents) -> InterpResult<'tcx> {
+        let this = self.eval_context_mut();
+
+        for evt in events.acc_events {
+            let evt_rg = evt.get_range();
+            // LLVM at least permits vectorising accesses to adjacent allocations,
+            // so we cannot assume 1 access = 1 allocation. :(
+            let mut rg = evt_rg.addr..evt_rg.end();
+            while let Some(curr) = rg.next() {
+                let Some(alloc_id) = this.alloc_id_from_addr(
+                    curr.to_u64(),
+                    rg.len().try_into().unwrap(),
+                    /* only_exposed_allocations */ true,
+                ) else {
+                    throw_ub_format!("Foreign code did an out-of-bounds access!")
+                };
+                let alloc = this.get_alloc_raw(alloc_id)?;
+                // The logical and physical address of the allocation coincide, so we can use
+                // this instead of `addr_from_alloc_id`.
+                let alloc_addr = alloc.get_bytes_unchecked_raw().addr();
+
+                // Determine the range inside the allocation that this access covers. This range is
+                // in terms of offsets from the start of `alloc`. The start of the overlap range
+                // will be `curr`; the end will be the minimum of the end of the allocation and the
+                // end of the access' range.
+                let overlap = curr.strict_sub(alloc_addr)
+                    ..std::cmp::min(alloc.len(), rg.end.strict_sub(alloc_addr));
+                // Skip forward however many bytes of the access are contained in the current
+                // allocation, subtracting 1 since the overlap range includes the current addr
+                // that was already popped off of the range.
+                rg.advance_by(overlap.len().strict_sub(1)).unwrap();
+
+                match evt {
+                    AccessEvent::Read(_) => {
+                        // FIXME: ProvenanceMap should have something like get_range().
+                        let p_map = alloc.provenance();
+                        for idx in overlap {
+                            // If a provenance was read by the foreign code, expose it.
+                            if let Some(prov) = p_map.get(Size::from_bytes(idx), this) {
+                                this.expose_provenance(prov)?;
+                            }
+                        }
+                    }
+                    AccessEvent::Write(_, certain) => {
+                        // Sometimes we aren't certain if a write happened, in which case we
+                        // only initialise that data if the allocation is mutable.
+                        if certain || alloc.mutability.is_mut() {
+                            let (alloc, cx) = this.get_alloc_raw_mut(alloc_id)?;
+                            alloc.process_native_write(
+                                &cx.tcx,
+                                Some(AllocRange {
+                                    start: Size::from_bytes(overlap.start),
+                                    size: Size::from_bytes(overlap.len()),
+                                }),
+                            )
+                        }
+                    }
+                }
+            }
+        }
+
+        interp_ok(())
+    }
 }
 
 impl<'tcx> EvalContextExt<'tcx> for crate::MiriInterpCx<'tcx> {}
@@ -194,6 +296,9 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
             }
         };
 
+        // Do we have ptrace?
+        let tracing = trace::Supervisor::is_enabled();
+
         // Get the function arguments, and convert them to `libffi`-compatible form.
         let mut libffi_args = Vec::<CArg>::with_capacity(args.len());
         for arg in args.iter() {
@@ -213,12 +318,7 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
                 // The first time this happens, print a warning.
                 if !this.machine.native_call_mem_warned.replace(true) {
                     // Newly set, so first time we get here.
-                    this.emit_diagnostic(NonHaltingDiagnostic::NativeCallSharedMem {
-                        //#[cfg(target_os = "linux")]
-                        //tracing: self::trace::Supervisor::is_enabled(),
-                        //#[cfg(not(target_os = "linux"))]
-                        tracing: false,
-                    });
+                    this.emit_diagnostic(NonHaltingDiagnostic::NativeCallSharedMem { tracing });
                 }
 
                 this.expose_provenance(prov)?;
@@ -231,7 +331,8 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
             .collect::<Vec<libffi::high::Arg<'_>>>();
 
         // Prepare all exposed memory (both previously exposed, and just newly exposed since a
-        // pointer was passed as argument).
+        // pointer was passed as argument). Uninitialised memory is left as-is, but any data
+        // exposed this way is garbage anyway.
         this.visit_reachable_allocs(this.exposed_allocs(), |this, alloc_id, info| {
             // If there is no data behind this pointer, skip this.
             if !matches!(info.kind, AllocKind::LiveData) {
@@ -244,15 +345,23 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
             // be read by FFI. The `black_box` is defensive programming as LLVM likes
             // to (incorrectly) optimize away ptr2int casts whose result is unused.
             std::hint::black_box(alloc.get_bytes_unchecked_raw().expose_provenance());
-            // Expose all provenances in this allocation, since the native code can do $whatever.
-            for prov in alloc.provenance().provenances() {
-                this.expose_provenance(prov)?;
+
+            if !tracing {
+                // Expose all provenances in this allocation, since the native code can do $whatever.
+                // Can be skipped when tracing; in that case we'll expose just the actually-read parts later.
+                for prov in alloc.provenance().provenances() {
+                    this.expose_provenance(prov)?;
+                }
             }
 
             // Prepare for possible write from native code if mutable.
             if info.mutbl.is_mut() {
-                let alloc = &mut this.get_alloc_raw_mut(alloc_id)?.0;
-                alloc.prepare_for_native_access();
+                let (alloc, cx) = this.get_alloc_raw_mut(alloc_id)?;
+                // These writes could initialize everything and wreck havoc with the pointers.
+                // We can skip that when tracing; in that case we'll later do that only for the memory that got actually written.
+                if !tracing {
+                    alloc.process_native_write(&cx.tcx, None);
+                }
                 // Also expose *mutable* provenance for the interpreter-level allocation.
                 std::hint::black_box(alloc.get_bytes_unchecked_raw_mut().expose_provenance());
             }
@@ -264,10 +373,8 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
         let (ret, maybe_memevents) =
             this.call_native_with_args(link_name, dest, code_ptr, libffi_args)?;
 
-        if cfg!(target_os = "linux")
-            && let Some(events) = maybe_memevents
-        {
-            trace!("Registered FFI events:\n{events:#0x?}");
+        if tracing {
+            this.tracing_apply_accesses(maybe_memevents.unwrap())?;
         }
 
         this.write_immediate(*ret, dest)?;
diff --git a/src/tools/miri/src/shims/native_lib/trace/child.rs b/src/tools/miri/src/shims/native_lib/trace/child.rs
index 4961e875c77..b998ba822dd 100644
--- a/src/tools/miri/src/shims/native_lib/trace/child.rs
+++ b/src/tools/miri/src/shims/native_lib/trace/child.rs
@@ -1,15 +1,26 @@
 use std::cell::RefCell;
+use std::ptr::NonNull;
 use std::rc::Rc;
 
 use ipc_channel::ipc;
-use nix::sys::{ptrace, signal};
+use nix::sys::{mman, ptrace, signal};
 use nix::unistd;
+use rustc_const_eval::interpret::InterpResult;
 
 use super::CALLBACK_STACK_SIZE;
-use super::messages::{Confirmation, MemEvents, StartFfiInfo, TraceRequest};
+use super::messages::{Confirmation, StartFfiInfo, TraceRequest};
 use super::parent::{ChildListener, sv_loop};
 use crate::alloc::isolated_alloc::IsolatedAlloc;
+use crate::shims::native_lib::MemEvents;
 
+/// A handle to the single, shared supervisor process across all `MiriMachine`s.
+/// Since it would be very difficult to trace multiple FFI calls in parallel, we
+/// need to ensure that either (a) only one `MiriMachine` is performing an FFI call
+/// at any given time, or (b) there are distinct supervisor and child processes for
+/// each machine. The former was chosen here.
+///
+/// This should only contain a `None` if the supervisor has not (yet) been initialised;
+/// otherwise, if `init_sv` was called and did not error, this will always be nonempty.
 static SUPERVISOR: std::sync::Mutex<Option<Supervisor>> = std::sync::Mutex::new(None);
 
 /// The main means of communication between the child and parent process,
@@ -34,121 +45,126 @@ impl Supervisor {
         SUPERVISOR.lock().unwrap().is_some()
     }
 
-    /// Begins preparations for doing an FFI call. This should be called at
-    /// the last possible moment before entering said call. `alloc` points to
-    /// the allocator which handed out the memory used for this machine.
-    ///
+    unsafe fn protect_pages(
+        pages: impl Iterator<Item = (NonNull<u8>, usize)>,
+        prot: mman::ProtFlags,
+    ) -> Result<(), nix::errno::Errno> {
+        for (pg, sz) in pages {
+            unsafe { mman::mprotect(pg.cast(), sz, prot)? };
+        }
+        Ok(())
+    }
+
+    /// Performs an arbitrary FFI call, enabling tracing from the supervisor.
     /// As this locks the supervisor via a mutex, no other threads may enter FFI
-    /// until this one returns and its guard is dropped via `end_ffi`. The
-    /// pointer returned should be passed to `end_ffi` to avoid a memory leak.
-    ///
-    /// SAFETY: The resulting guard must be dropped *via `end_ffi`* immediately
-    /// after the desired call has concluded.
-    pub unsafe fn start_ffi(
+    /// until this function returns.
+    pub fn do_ffi<'tcx>(
         alloc: &Rc<RefCell<IsolatedAlloc>>,
-    ) -> (std::sync::MutexGuard<'static, Option<Supervisor>>, Option<*mut [u8; CALLBACK_STACK_SIZE]>)
-    {
+        f: impl FnOnce() -> InterpResult<'tcx, crate::ImmTy<'tcx>>,
+    ) -> InterpResult<'tcx, (crate::ImmTy<'tcx>, Option<MemEvents>)> {
         let mut sv_guard = SUPERVISOR.lock().unwrap();
-        // If the supervisor is not initialised for whatever reason, fast-fail.
-        // This might be desired behaviour, as even on platforms where ptracing
-        // is not implemented it enables us to enforce that only one FFI call
+        // If the supervisor is not initialised for whatever reason, fast-return.
+        // As a side-effect, even on platforms where ptracing
+        // is not implemented, we enforce that only one FFI call
         // happens at a time.
-        let Some(sv) = sv_guard.take() else {
-            return (sv_guard, None);
-        };
+        let Some(sv) = sv_guard.as_mut() else { return f().map(|v| (v, None)) };
 
         // Get pointers to all the pages the supervisor must allow accesses in
         // and prepare the callback stack.
-        let page_ptrs = alloc.borrow().pages();
+        let alloc = alloc.borrow();
+        let page_size = alloc.page_size();
+        let page_ptrs = alloc
+            .pages()
+            .flat_map(|(pg, sz)| {
+                // Convert (page, size) pair into list of pages.
+                let start = pg.expose_provenance().get();
+                (0..sz.strict_div(alloc.page_size()))
+                    .map(move |i| start.strict_add(i.strict_mul(page_size)))
+            })
+            .collect();
         let raw_stack_ptr: *mut [u8; CALLBACK_STACK_SIZE] =
             Box::leak(Box::new([0u8; CALLBACK_STACK_SIZE])).as_mut_ptr().cast();
         let stack_ptr = raw_stack_ptr.expose_provenance();
         let start_info = StartFfiInfo { page_ptrs, stack_ptr };
 
-        // SAFETY: We do not access machine memory past this point until the
-        // supervisor is ready to allow it.
-        unsafe {
-            if alloc.borrow_mut().prepare_ffi().is_err() {
-                // Don't mess up unwinding by maybe leaving the memory partly protected
-                alloc.borrow_mut().unprep_ffi();
-                panic!("Cannot protect memory for FFI call!");
+        // Unwinding might be messed up due to partly protected memory, so let's abort if something
+        // breaks inside here.
+        let res = std::panic::abort_unwind(|| {
+            // SAFETY: We do not access machine memory past this point until the
+            // supervisor is ready to allow it.
+            // FIXME: this is sketchy, as technically the memory is still in the Rust Abstract Machine,
+            // and the compiler would be allowed to reorder accesses below this block...
+            unsafe {
+                Self::protect_pages(alloc.pages(), mman::ProtFlags::PROT_NONE).unwrap();
             }
-        }
 
-        // Send over the info.
-        // NB: if we do not wait to receive a blank confirmation response, it is
-        // possible that the supervisor is alerted of the SIGSTOP *before* it has
-        // actually received the start_info, thus deadlocking! This way, we can
-        // enforce an ordering for these events.
-        sv.message_tx.send(TraceRequest::StartFfi(start_info)).unwrap();
-        sv.confirm_rx.recv().unwrap();
-        *sv_guard = Some(sv);
-        // We need to be stopped for the supervisor to be able to make certain
-        // modifications to our memory - simply waiting on the recv() doesn't
-        // count.
-        signal::raise(signal::SIGSTOP).unwrap();
-        (sv_guard, Some(raw_stack_ptr))
-    }
+            // Send over the info.
+            // NB: if we do not wait to receive a blank confirmation response, it is
+            // possible that the supervisor is alerted of the SIGSTOP *before* it has
+            // actually received the start_info, thus deadlocking! This way, we can
+            // enforce an ordering for these events.
+            sv.message_tx.send(TraceRequest::StartFfi(start_info)).unwrap();
+            sv.confirm_rx.recv().unwrap();
+            // We need to be stopped for the supervisor to be able to make certain
+            // modifications to our memory - simply waiting on the recv() doesn't
+            // count.
+            signal::raise(signal::SIGSTOP).unwrap();
+
+            let res = f();
+
+            // We can't use IPC channels here to signal that FFI mode has ended,
+            // since they might allocate memory which could get us stuck in a SIGTRAP
+            // with no easy way out! While this could be worked around, it is much
+            // simpler and more robust to simply use the signals which are left for
+            // arbitrary usage. Since this will block until we are continued by the
+            // supervisor, we can assume past this point that everything is back to
+            // normal.
+            signal::raise(signal::SIGUSR1).unwrap();
+
+            // SAFETY: We set memory back to normal, so this is safe.
+            unsafe {
+                Self::protect_pages(
+                    alloc.pages(),
+                    mman::ProtFlags::PROT_READ | mman::ProtFlags::PROT_WRITE,
+                )
+                .unwrap();
+            }
+
+            res
+        });
 
-    /// Undoes FFI-related preparations, allowing Miri to continue as normal, then
-    /// gets the memory accesses and changes performed during the FFI call. Note
-    /// that this may include some spurious accesses done by `libffi` itself in
-    /// the process of executing the function call.
-    ///
-    /// SAFETY: The `sv_guard` and `raw_stack_ptr` passed must be the same ones
-    /// received by a prior call to `start_ffi`, and the allocator must be the
-    /// one passed to it also.
-    pub unsafe fn end_ffi(
-        alloc: &Rc<RefCell<IsolatedAlloc>>,
-        mut sv_guard: std::sync::MutexGuard<'static, Option<Supervisor>>,
-        raw_stack_ptr: Option<*mut [u8; CALLBACK_STACK_SIZE]>,
-    ) -> Option<MemEvents> {
-        // We can't use IPC channels here to signal that FFI mode has ended,
-        // since they might allocate memory which could get us stuck in a SIGTRAP
-        // with no easy way out! While this could be worked around, it is much
-        // simpler and more robust to simply use the signals which are left for
-        // arbitrary usage. Since this will block until we are continued by the
-        // supervisor, we can assume past this point that everything is back to
-        // normal.
-        signal::raise(signal::SIGUSR1).unwrap();
-
-        // This is safe! It just sets memory to normal expected permissions.
-        alloc.borrow_mut().unprep_ffi();
-
-        // If this is `None`, then `raw_stack_ptr` is None and does not need to
-        // be deallocated (and there's no need to worry about the guard, since
-        // it contains nothing).
-        let sv = sv_guard.take()?;
         // SAFETY: Caller upholds that this pointer was allocated as a box with
         // this type.
         unsafe {
-            drop(Box::from_raw(raw_stack_ptr.unwrap()));
+            drop(Box::from_raw(raw_stack_ptr));
         }
         // On the off-chance something really weird happens, don't block forever.
-        let ret = sv
+        let events = sv
             .event_rx
             .try_recv_timeout(std::time::Duration::from_secs(5))
             .map_err(|e| {
                 match e {
                     ipc::TryRecvError::IpcError(_) => (),
                     ipc::TryRecvError::Empty =>
-                        eprintln!("Waiting for accesses from supervisor timed out!"),
+                        panic!("Waiting for accesses from supervisor timed out!"),
                 }
             })
             .ok();
-        // Do *not* leave the supervisor empty, or else we might get another fork...
-        *sv_guard = Some(sv);
-        ret
+
+        res.map(|v| (v, events))
     }
 }
 
 /// Initialises the supervisor process. If this function errors, then the
 /// supervisor process could not be created successfully; else, the caller
-/// is now the child process and can communicate via `start_ffi`/`end_ffi`,
-/// receiving back events through `get_events`.
+/// is now the child process and can communicate via `do_ffi`, receiving back
+/// events at the end.
 ///
 /// # Safety
-/// The invariants for `fork()` must be upheld by the caller.
+/// The invariants for `fork()` must be upheld by the caller, namely either:
+/// - Other threads do not exist, or;
+/// - If they do exist, either those threads or the resulting child process
+///   only ever act in [async-signal-safe](https://www.man7.org/linux/man-pages/man7/signal-safety.7.html) ways.
 pub unsafe fn init_sv() -> Result<(), SvInitError> {
     // FIXME: Much of this could be reimplemented via the mitosis crate if we upstream the
     // relevant missing bits.
@@ -191,8 +207,7 @@ pub unsafe fn init_sv() -> Result<(), SvInitError> {
                 // The child process is free to unwind, so we won't to avoid doubly freeing
                 // system resources.
                 let init = std::panic::catch_unwind(|| {
-                    let listener =
-                        ChildListener { message_rx, attached: false, override_retcode: None };
+                    let listener = ChildListener::new(message_rx, confirm_tx.clone());
                     // Trace as many things as possible, to be able to handle them as needed.
                     let options = ptrace::Options::PTRACE_O_TRACESYSGOOD
                         | ptrace::Options::PTRACE_O_TRACECLONE
@@ -218,7 +233,9 @@ pub unsafe fn init_sv() -> Result<(), SvInitError> {
                     // The "Ok" case means that we couldn't ptrace.
                     Ok(e) => return Err(e),
                     Err(p) => {
-                        eprintln!("Supervisor process panicked!\n{p:?}");
+                        eprintln!(
+                            "Supervisor process panicked!\n{p:?}\n\nTry running again without using the native-lib tracer."
+                        );
                         std::process::exit(1);
                     }
                 }
@@ -239,13 +256,11 @@ pub unsafe fn init_sv() -> Result<(), SvInitError> {
 }
 
 /// Instruct the supervisor process to return a particular code. Useful if for
-/// whatever reason this code fails to be intercepted normally. In the case of
-/// `abort_if_errors()` used in `bin/miri.rs`, the return code is erroneously
-/// given as a 0 if this is not used.
+/// whatever reason this code fails to be intercepted normally.
 pub fn register_retcode_sv(code: i32) {
     let mut sv_guard = SUPERVISOR.lock().unwrap();
-    if let Some(sv) = sv_guard.take() {
+    if let Some(sv) = sv_guard.as_mut() {
         sv.message_tx.send(TraceRequest::OverrideRetcode(code)).unwrap();
-        *sv_guard = Some(sv);
+        sv.confirm_rx.recv().unwrap();
     }
 }
diff --git a/src/tools/miri/src/shims/native_lib/trace/messages.rs b/src/tools/miri/src/shims/native_lib/trace/messages.rs
index 8a83dab5c09..bef6cc1b2f3 100644
--- a/src/tools/miri/src/shims/native_lib/trace/messages.rs
+++ b/src/tools/miri/src/shims/native_lib/trace/messages.rs
@@ -1,25 +1,28 @@
 //! Houses the types that are directly sent across the IPC channels.
 //!
-//! The overall structure of a traced FFI call, from the child process's POV, is
-//! as follows:
+//! When forking to initialise the supervisor during `init_sv`, the child raises
+//! a `SIGSTOP`; if the parent successfully ptraces the child, it will allow it
+//! to resume. Else, the child will be killed by the parent.
+//!
+//! After initialisation is done, the overall structure of a traced FFI call from
+//! the child process's POV is as follows:
 //! ```
 //! message_tx.send(TraceRequest::StartFfi);
-//! confirm_rx.recv();
+//! confirm_rx.recv(); // receives a `Confirmation`
 //! raise(SIGSTOP);
 //! /* do ffi call */
 //! raise(SIGUSR1); // morally equivalent to some kind of "TraceRequest::EndFfi"
-//! let events = event_rx.recv();
+//! let events = event_rx.recv(); // receives a `MemEvents`
 //! ```
 //! `TraceRequest::OverrideRetcode` can be sent at any point in the above, including
-//! before or after all of them.
+//! before or after all of them. `confirm_rx.recv()` is to be called after, to ensure
+//! that the child does not exit before the supervisor has registered the return code.
 //!
 //! NB: sending these events out of order, skipping steps, etc. will result in
 //! unspecified behaviour from the supervisor process, so use the abstractions
-//! in `super::child` (namely `start_ffi()` and `end_ffi()`) to handle this. It is
+//! in `super::child` (namely `do_ffi()`) to handle this. It is
 //! trivially easy to cause a deadlock or crash by messing this up!
 
-use std::ops::Range;
-
 /// An IPC request sent by the child process to the parent.
 ///
 /// The sender for this channel should live on the child process.
@@ -34,14 +37,15 @@ pub enum TraceRequest {
     StartFfi(StartFfiInfo),
     /// Manually overrides the code that the supervisor will return upon exiting.
     /// Once set, it is permanent. This can be called again to change the value.
+    ///
+    /// After sending this, the child must wait to receive a `Confirmation`.
     OverrideRetcode(i32),
 }
 
 /// Information needed to begin tracing.
 #[derive(serde::Serialize, serde::Deserialize, Debug, Clone)]
 pub struct StartFfiInfo {
-    /// A vector of page addresses. These should have been automatically obtained
-    /// with `IsolatedAlloc::pages` and prepared with `IsolatedAlloc::prepare_ffi`.
+    /// A vector of page addresses that store the miri heap which is accessible from C.
     pub page_ptrs: Vec<usize>,
     /// The address of an allocation that can serve as a temporary stack.
     /// This should be a leaked `Box<[u8; CALLBACK_STACK_SIZE]>` cast to an int.
@@ -54,27 +58,3 @@ pub struct StartFfiInfo {
 /// The sender for this channel should live on the parent process.
 #[derive(serde::Serialize, serde::Deserialize, Debug)]
 pub struct Confirmation;
-
-/// The final results of an FFI trace, containing every relevant event detected
-/// by the tracer. Sent by the supervisor after receiving a `SIGUSR1` signal.
-///
-/// The sender for this channel should live on the parent process.
-#[derive(serde::Serialize, serde::Deserialize, Debug)]
-pub struct MemEvents {
-    /// An ordered list of memory accesses that occurred. These should be assumed
-    /// to be overcautious; that is, if the size of an access is uncertain it is
-    /// pessimistically rounded up, and if the type (read/write/both) is uncertain
-    /// it is reported as whatever would be safest to assume; i.e. a read + maybe-write
-    /// becomes a read + write, etc.
-    pub acc_events: Vec<AccessEvent>,
-}
-
-/// A single memory access, conservatively overestimated
-/// in case of ambiguity.
-#[derive(serde::Serialize, serde::Deserialize, Debug)]
-pub enum AccessEvent {
-    /// A read may have occurred on no more than the specified address range.
-    Read(Range<usize>),
-    /// A write may have occurred on no more than the specified address range.
-    Write(Range<usize>),
-}
diff --git a/src/tools/miri/src/shims/native_lib/trace/mod.rs b/src/tools/miri/src/shims/native_lib/trace/mod.rs
index 174b06b3ac5..c8abacfb5e2 100644
--- a/src/tools/miri/src/shims/native_lib/trace/mod.rs
+++ b/src/tools/miri/src/shims/native_lib/trace/mod.rs
@@ -5,4 +5,6 @@ mod parent;
 pub use self::child::{Supervisor, init_sv, register_retcode_sv};
 
 /// The size of the temporary stack we use for callbacks that the server executes in the client.
+/// This should be big enough that `mempr_on` and `mempr_off` can safely be jumped into with the
+/// stack pointer pointing to a "stack" of this size without overflowing it.
 const CALLBACK_STACK_SIZE: usize = 1024;
diff --git a/src/tools/miri/src/shims/native_lib/trace/parent.rs b/src/tools/miri/src/shims/native_lib/trace/parent.rs
index dfb0b35da69..83f6c7a13fc 100644
--- a/src/tools/miri/src/shims/native_lib/trace/parent.rs
+++ b/src/tools/miri/src/shims/native_lib/trace/parent.rs
@@ -5,26 +5,17 @@ use nix::sys::{ptrace, signal, wait};
 use nix::unistd;
 
 use super::CALLBACK_STACK_SIZE;
-use super::messages::{AccessEvent, Confirmation, MemEvents, StartFfiInfo, TraceRequest};
+use super::messages::{Confirmation, StartFfiInfo, TraceRequest};
+use crate::shims::native_lib::{AccessEvent, AccessRange, MemEvents};
 
 /// The flags to use when calling `waitid()`.
-/// Since bitwise or on the nix version of these flags is implemented as a trait,
-/// this cannot be const directly so we do it this way.
 const WAIT_FLAGS: wait::WaitPidFlag =
-    wait::WaitPidFlag::from_bits_truncate(libc::WUNTRACED | libc::WEXITED);
-
-/// Arch-specific maximum size a single access might perform. x86 value is set
-/// assuming nothing bigger than AVX-512 is available.
-#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-const ARCH_MAX_ACCESS_SIZE: usize = 64;
-/// The largest arm64 simd instruction operates on 16 bytes.
-#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
-const ARCH_MAX_ACCESS_SIZE: usize = 16;
+    wait::WaitPidFlag::WUNTRACED.union(wait::WaitPidFlag::WEXITED);
 
 /// The default word size on a given platform, in bytes.
-#[cfg(any(target_arch = "x86", target_arch = "arm"))]
+#[cfg(target_arch = "x86")]
 const ARCH_WORD_SIZE: usize = 4;
-#[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))]
+#[cfg(target_arch = "x86_64")]
 const ARCH_WORD_SIZE: usize = 8;
 
 /// The address of the page set to be edited, initialised to a sentinel null
@@ -53,39 +44,25 @@ trait ArchIndependentRegs {
 // It's fine / desirable behaviour for values to wrap here, we care about just
 // preserving the bit pattern.
 #[cfg(target_arch = "x86_64")]
-#[expect(clippy::as_conversions)]
 #[rustfmt::skip]
 impl ArchIndependentRegs for libc::user_regs_struct {
     #[inline]
-    fn ip(&self) -> usize { self.rip as _ }
+    fn ip(&self) -> usize { self.rip.try_into().unwrap() }
     #[inline]
-    fn set_ip(&mut self, ip: usize) { self.rip = ip as _ }
+    fn set_ip(&mut self, ip: usize) { self.rip = ip.try_into().unwrap() }
     #[inline]
-    fn set_sp(&mut self, sp: usize) { self.rsp = sp as _ }
+    fn set_sp(&mut self, sp: usize) { self.rsp = sp.try_into().unwrap() }
 }
 
 #[cfg(target_arch = "x86")]
-#[expect(clippy::as_conversions)]
 #[rustfmt::skip]
 impl ArchIndependentRegs for libc::user_regs_struct {
     #[inline]
-    fn ip(&self) -> usize { self.eip as _ }
+    fn ip(&self) -> usize { self.eip.cast_unsigned().try_into().unwrap() }
     #[inline]
-    fn set_ip(&mut self, ip: usize) { self.eip = ip as _ }
+    fn set_ip(&mut self, ip: usize) { self.eip = ip.cast_signed().try_into().unwrap() }
     #[inline]
-    fn set_sp(&mut self, sp: usize) { self.esp = sp as _ }
-}
-
-#[cfg(target_arch = "aarch64")]
-#[expect(clippy::as_conversions)]
-#[rustfmt::skip]
-impl ArchIndependentRegs for libc::user_regs_struct {
-    #[inline]
-    fn ip(&self) -> usize { self.pc as _ }
-    #[inline]
-    fn set_ip(&mut self, ip: usize) { self.pc = ip as _ }
-    #[inline]
-    fn set_sp(&mut self, sp: usize) { self.sp = sp as _ }
+    fn set_sp(&mut self, sp: usize) { self.esp = sp.cast_signed().try_into().unwrap() }
 }
 
 /// A unified event representing something happening on the child process. Wraps
@@ -109,11 +86,24 @@ pub enum ExecEvent {
 /// A listener for the FFI start info channel along with relevant state.
 pub struct ChildListener {
     /// The matching channel for the child's `Supervisor` struct.
-    pub message_rx: ipc::IpcReceiver<TraceRequest>,
+    message_rx: ipc::IpcReceiver<TraceRequest>,
+    /// ...
+    confirm_tx: ipc::IpcSender<Confirmation>,
     /// Whether an FFI call is currently ongoing.
-    pub attached: bool,
+    attached: bool,
     /// If `Some`, overrides the return code with the given value.
-    pub override_retcode: Option<i32>,
+    override_retcode: Option<i32>,
+    /// Last code obtained from a child exiting.
+    last_code: Option<i32>,
+}
+
+impl ChildListener {
+    pub fn new(
+        message_rx: ipc::IpcReceiver<TraceRequest>,
+        confirm_tx: ipc::IpcSender<Confirmation>,
+    ) -> Self {
+        Self { message_rx, confirm_tx, attached: false, override_retcode: None, last_code: None }
+    }
 }
 
 impl Iterator for ChildListener {
@@ -133,16 +123,10 @@ impl Iterator for ChildListener {
                 Ok(stat) =>
                     match stat {
                         // Child exited normally with a specific code set.
-                        wait::WaitStatus::Exited(_, code) => {
-                            let code = self.override_retcode.unwrap_or(code);
-                            return Some(ExecEvent::Died(Some(code)));
-                        }
+                        wait::WaitStatus::Exited(_, code) => self.last_code = Some(code),
                         // Child was killed by a signal, without giving a code.
-                        wait::WaitStatus::Signaled(_, _, _) =>
-                            return Some(ExecEvent::Died(self.override_retcode)),
-                        // Child entered a syscall. Since we're always technically
-                        // tracing, only pass this along if we're actively
-                        // monitoring the child.
+                        wait::WaitStatus::Signaled(_, _, _) => self.last_code = None,
+                        // Child entered or exited a syscall.
                         wait::WaitStatus::PtraceSyscall(pid) =>
                             if self.attached {
                                 return Some(ExecEvent::Syscall(pid));
@@ -179,10 +163,8 @@ impl Iterator for ChildListener {
                             },
                         _ => (),
                     },
-                // This case should only trigger if all children died and we
-                // somehow missed that, but it's best we not allow any room
-                // for deadlocks.
-                Err(_) => return Some(ExecEvent::Died(None)),
+                // This case should only trigger when all children died.
+                Err(_) => return Some(ExecEvent::Died(self.override_retcode.or(self.last_code))),
             }
 
             // Similarly, do a non-blocking poll of the IPC channel.
@@ -196,7 +178,10 @@ impl Iterator for ChildListener {
                             self.attached = true;
                             return Some(ExecEvent::Start(info));
                         },
-                    TraceRequest::OverrideRetcode(code) => self.override_retcode = Some(code),
+                    TraceRequest::OverrideRetcode(code) => {
+                        self.override_retcode = Some(code);
+                        self.confirm_tx.send(Confirmation).unwrap();
+                    }
                 }
             }
 
@@ -211,6 +196,12 @@ impl Iterator for ChildListener {
 #[derive(Debug)]
 pub struct ExecEnd(pub Option<i32>);
 
+/// Whether to call `ptrace::cont()` immediately. Used exclusively by `wait_for_signal`.
+enum InitialCont {
+    Yes,
+    No,
+}
+
 /// This is the main loop of the supervisor process. It runs in a separate
 /// process from the rest of Miri (but because we fork, addresses for anything
 /// created before the fork - like statics - are the same).
@@ -239,12 +230,12 @@ pub fn sv_loop(
     let mut curr_pid = init_pid;
 
     // There's an initial sigstop we need to deal with.
-    wait_for_signal(Some(curr_pid), signal::SIGSTOP, false)?;
+    wait_for_signal(Some(curr_pid), signal::SIGSTOP, InitialCont::No)?;
     ptrace::cont(curr_pid, None).unwrap();
 
     for evt in listener {
         match evt {
-            // start_ffi was called by the child, so prep memory.
+            // Child started ffi, so prep memory.
             ExecEvent::Start(ch_info) => {
                 // All the pages that the child process is "allowed to" access.
                 ch_pages = ch_info.page_ptrs;
@@ -252,17 +243,17 @@ pub fn sv_loop(
                 ch_stack = Some(ch_info.stack_ptr);
 
                 // We received the signal and are no longer in the main listener loop,
-                // so we can let the child move on to the end of start_ffi where it will
+                // so we can let the child move on to the end of the ffi prep where it will
                 // raise a SIGSTOP. We need it to be signal-stopped *and waited for* in
                 // order to do most ptrace operations!
                 confirm_tx.send(Confirmation).unwrap();
                 // We can't trust simply calling `Pid::this()` in the child process to give the right
                 // PID for us, so we get it this way.
-                curr_pid = wait_for_signal(None, signal::SIGSTOP, false).unwrap();
+                curr_pid = wait_for_signal(None, signal::SIGSTOP, InitialCont::No).unwrap();
 
                 ptrace::syscall(curr_pid, None).unwrap();
             }
-            // end_ffi was called by the child.
+            // Child wants to end tracing.
             ExecEvent::End => {
                 // Hand over the access info we traced.
                 event_tx.send(MemEvents { acc_events }).unwrap();
@@ -322,10 +313,6 @@ fn get_disasm() -> capstone::Capstone {
         {cs_pre.x86().mode(arch::x86::ArchMode::Mode64)}
         #[cfg(target_arch = "x86")]
         {cs_pre.x86().mode(arch::x86::ArchMode::Mode32)}
-        #[cfg(target_arch = "aarch64")]
-        {cs_pre.arm64().mode(arch::arm64::ArchMode::Arm)}
-        #[cfg(target_arch = "arm")]
-        {cs_pre.arm().mode(arch::arm::ArchMode::Arm)}
     }
     .detail(true)
     .build()
@@ -339,9 +326,9 @@ fn get_disasm() -> capstone::Capstone {
 fn wait_for_signal(
     pid: Option<unistd::Pid>,
     wait_signal: signal::Signal,
-    init_cont: bool,
+    init_cont: InitialCont,
 ) -> Result<unistd::Pid, ExecEnd> {
-    if init_cont {
+    if matches!(init_cont, InitialCont::Yes) {
         ptrace::cont(pid.unwrap(), None).unwrap();
     }
     // Repeatedly call `waitid` until we get the signal we want, or the process dies.
@@ -374,6 +361,84 @@ fn wait_for_signal(
     }
 }
 
+/// Add the memory events from `op` being executed while there is a memory access at `addr` to
+/// `acc_events`. Return whether this was a memory operand.
+fn capstone_find_events(
+    addr: usize,
+    op: &capstone::arch::ArchOperand,
+    acc_events: &mut Vec<AccessEvent>,
+) -> bool {
+    use capstone::prelude::*;
+    match op {
+        #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+        arch::ArchOperand::X86Operand(x86_operand) => {
+            match x86_operand.op_type {
+                // We only care about memory accesses
+                arch::x86::X86OperandType::Mem(_) => {
+                    let push = AccessRange { addr, size: x86_operand.size.into() };
+                    // It's called a "RegAccessType" but it also applies to memory
+                    let acc_ty = x86_operand.access.unwrap();
+                    // The same instruction might do both reads and writes, so potentially add both.
+                    // We do not know the order in which they happened, but writing and then reading
+                    // makes little sense so we put the read first. That is also the more
+                    // conservative choice.
+                    if acc_ty.is_readable() {
+                        acc_events.push(AccessEvent::Read(push.clone()));
+                    }
+                    if acc_ty.is_writable() {
+                        // FIXME: This could be made certain; either determine all cases where
+                        // only reads happen, or have an intermediate mempr_* function to first
+                        // map the page(s) as readonly and check if a segfault occurred.
+
+                        // Per https://docs.rs/iced-x86/latest/iced_x86/enum.OpAccess.html,
+                        // we know that the possible access types are Read, CondRead, Write,
+                        // CondWrite, ReadWrite, and ReadCondWrite. Since we got a segfault
+                        // we know some kind of access happened so Cond{Read, Write}s are
+                        // certain reads and writes; the only uncertainty is with an RW op
+                        // as it might be a ReadCondWrite with the write condition unmet.
+                        acc_events.push(AccessEvent::Write(push, !acc_ty.is_readable()));
+                    }
+
+                    return true;
+                }
+                _ => (),
+            }
+        }
+        // FIXME: arm64
+        _ => unimplemented!(),
+    }
+
+    false
+}
+
+/// Extract the events from the given instruction.
+fn capstone_disassemble(
+    instr: &[u8],
+    addr: usize,
+    cs: &capstone::Capstone,
+    acc_events: &mut Vec<AccessEvent>,
+) -> capstone::CsResult<()> {
+    // The arch_detail is what we care about, but it relies on these temporaries
+    // that we can't drop. 0x1000 is the default base address for Captsone, and
+    // we're expecting 1 instruction.
+    let insns = cs.disasm_count(instr, 0x1000, 1)?;
+    let ins_detail = cs.insn_detail(&insns[0])?;
+    let arch_detail = ins_detail.arch_detail();
+
+    let mut found_mem_op = false;
+
+    for op in arch_detail.operands() {
+        if capstone_find_events(addr, &op, acc_events) {
+            if found_mem_op {
+                panic!("more than one memory operand found; we don't know which one accessed what");
+            }
+            found_mem_op = true;
+        }
+    }
+
+    Ok(())
+}
+
 /// Grabs the access that caused a segfault and logs it down if it's to our memory,
 /// or kills the child and returns the appropriate error otherwise.
 fn handle_segfault(
@@ -384,116 +449,10 @@ fn handle_segfault(
     cs: &capstone::Capstone,
     acc_events: &mut Vec<AccessEvent>,
 ) -> Result<(), ExecEnd> {
-    /// This is just here to not pollute the main namespace with `capstone::prelude::*`.
-    #[inline]
-    fn capstone_disassemble(
-        instr: &[u8],
-        addr: usize,
-        cs: &capstone::Capstone,
-        acc_events: &mut Vec<AccessEvent>,
-    ) -> capstone::CsResult<()> {
-        use capstone::prelude::*;
-
-        // The arch_detail is what we care about, but it relies on these temporaries
-        // that we can't drop. 0x1000 is the default base address for Captsone, and
-        // we're expecting 1 instruction.
-        let insns = cs.disasm_count(instr, 0x1000, 1)?;
-        let ins_detail = cs.insn_detail(&insns[0])?;
-        let arch_detail = ins_detail.arch_detail();
-
-        for op in arch_detail.operands() {
-            match op {
-                #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-                arch::ArchOperand::X86Operand(x86_operand) => {
-                    match x86_operand.op_type {
-                        // We only care about memory accesses
-                        arch::x86::X86OperandType::Mem(_) => {
-                            let push = addr..addr.strict_add(usize::from(x86_operand.size));
-                            // It's called a "RegAccessType" but it also applies to memory
-                            let acc_ty = x86_operand.access.unwrap();
-                            if acc_ty.is_readable() {
-                                acc_events.push(AccessEvent::Read(push.clone()));
-                            }
-                            if acc_ty.is_writable() {
-                                acc_events.push(AccessEvent::Write(push));
-                            }
-                        }
-                        _ => (),
-                    }
-                }
-                #[cfg(target_arch = "aarch64")]
-                arch::ArchOperand::Arm64Operand(arm64_operand) => {
-                    // Annoyingly, we don't always get the size here, so just be pessimistic for now.
-                    match arm64_operand.op_type {
-                        arch::arm64::Arm64OperandType::Mem(_) => {
-                            // B = 1 byte, H = 2 bytes, S = 4 bytes, D = 8 bytes, Q = 16 bytes.
-                            let size = match arm64_operand.vas {
-                                // Not an fp/simd instruction.
-                                arch::arm64::Arm64Vas::ARM64_VAS_INVALID => ARCH_WORD_SIZE,
-                                // 1 byte.
-                                arch::arm64::Arm64Vas::ARM64_VAS_1B => 1,
-                                // 2 bytes.
-                                arch::arm64::Arm64Vas::ARM64_VAS_1H => 2,
-                                // 4 bytes.
-                                arch::arm64::Arm64Vas::ARM64_VAS_4B
-                                | arch::arm64::Arm64Vas::ARM64_VAS_2H
-                                | arch::arm64::Arm64Vas::ARM64_VAS_1S => 4,
-                                // 8 bytes.
-                                arch::arm64::Arm64Vas::ARM64_VAS_8B
-                                | arch::arm64::Arm64Vas::ARM64_VAS_4H
-                                | arch::arm64::Arm64Vas::ARM64_VAS_2S
-                                | arch::arm64::Arm64Vas::ARM64_VAS_1D => 8,
-                                // 16 bytes.
-                                arch::arm64::Arm64Vas::ARM64_VAS_16B
-                                | arch::arm64::Arm64Vas::ARM64_VAS_8H
-                                | arch::arm64::Arm64Vas::ARM64_VAS_4S
-                                | arch::arm64::Arm64Vas::ARM64_VAS_2D
-                                | arch::arm64::Arm64Vas::ARM64_VAS_1Q => 16,
-                            };
-                            let push = addr..addr.strict_add(size);
-                            // FIXME: This now has access type info in the latest
-                            // git version of capstone because this pissed me off
-                            // and I added it. Change this when it updates.
-                            acc_events.push(AccessEvent::Read(push.clone()));
-                            acc_events.push(AccessEvent::Write(push));
-                        }
-                        _ => (),
-                    }
-                }
-                #[cfg(target_arch = "arm")]
-                arch::ArchOperand::ArmOperand(arm_operand) =>
-                    match arm_operand.op_type {
-                        arch::arm::ArmOperandType::Mem(_) => {
-                            // We don't get info on the size of the access, but
-                            // we're at least told if it's a vector instruction.
-                            let size = if arm_operand.vector_index.is_some() {
-                                ARCH_MAX_ACCESS_SIZE
-                            } else {
-                                ARCH_WORD_SIZE
-                            };
-                            let push = addr..addr.strict_add(size);
-                            let acc_ty = arm_operand.access.unwrap();
-                            if acc_ty.is_readable() {
-                                acc_events.push(AccessEvent::Read(push.clone()));
-                            }
-                            if acc_ty.is_writable() {
-                                acc_events.push(AccessEvent::Write(push));
-                            }
-                        }
-                        _ => (),
-                    },
-                _ => unimplemented!(),
-            }
-        }
-
-        Ok(())
-    }
-
     // Get information on what caused the segfault. This contains the address
     // that triggered it.
     let siginfo = ptrace::getsiginfo(pid).unwrap();
-    // All x86, ARM, etc. instructions only have at most one memory operand
-    // (thankfully!)
+    // All x86 instructions only have at most one memory operand (thankfully!)
     // SAFETY: si_addr is safe to call.
     let addr = unsafe { siginfo.si_addr().addr() };
     let page_addr = addr.strict_sub(addr.strict_rem(page_size));
@@ -515,7 +474,7 @@ fn handle_segfault(
     //   global atomic variables. This is what we use the temporary callback stack for.
     // - Step 1 instruction
     // - Parse executed code to estimate size & type of access
-    // - Reprotect the memory by executing `mempr_on` in the child.
+    // - Reprotect the memory by executing `mempr_on` in the child, using the callback stack again.
     // - Continue
 
     // Ensure the stack is properly zeroed out!
@@ -540,7 +499,7 @@ fn handle_segfault(
     ptrace::write(
         pid,
         (&raw const PAGE_ADDR).cast_mut().cast(),
-        libc::c_long::try_from(page_addr).unwrap(),
+        libc::c_long::try_from(page_addr.cast_signed()).unwrap(),
     )
     .unwrap();
 
@@ -552,7 +511,7 @@ fn handle_segfault(
     ptrace::setregs(pid, new_regs).unwrap();
 
     // Our mempr_* functions end with a raise(SIGSTOP).
-    wait_for_signal(Some(pid), signal::SIGSTOP, true)?;
+    wait_for_signal(Some(pid), signal::SIGSTOP, InitialCont::Yes)?;
 
     // Step 1 instruction.
     ptrace::setregs(pid, regs_bak).unwrap();
@@ -573,6 +532,12 @@ fn handle_segfault(
     let regs_bak = ptrace::getregs(pid).unwrap();
     new_regs = regs_bak;
     let ip_poststep = regs_bak.ip();
+
+    // Ensure that we've actually gone forwards.
+    assert!(ip_poststep > ip_prestep);
+    // But not by too much. 64 bytes should be "big enough" on ~any architecture.
+    assert!(ip_prestep.strict_add(64) > ip_poststep);
+
     // We need to do reads/writes in word-sized chunks.
     let diff = (ip_poststep.strict_sub(ip_prestep)).div_ceil(ARCH_WORD_SIZE);
     let instr = (ip_prestep..ip_prestep.strict_add(diff)).fold(vec![], |mut ret, ip| {
@@ -587,20 +552,14 @@ fn handle_segfault(
     });
 
     // Now figure out the size + type of access and log it down.
-    // This will mark down e.g. the same area being read multiple times,
-    // since it's more efficient to compress the accesses at the end.
-    if capstone_disassemble(&instr, addr, cs, acc_events).is_err() {
-        // Read goes first because we need to be pessimistic.
-        acc_events.push(AccessEvent::Read(addr..addr.strict_add(ARCH_MAX_ACCESS_SIZE)));
-        acc_events.push(AccessEvent::Write(addr..addr.strict_add(ARCH_MAX_ACCESS_SIZE)));
-    }
+    capstone_disassemble(&instr, addr, cs, acc_events).expect("Failed to disassemble instruction");
 
     // Reprotect everything and continue.
     #[expect(clippy::as_conversions)]
     new_regs.set_ip(mempr_on as usize);
     new_regs.set_sp(stack_ptr);
     ptrace::setregs(pid, new_regs).unwrap();
-    wait_for_signal(Some(pid), signal::SIGSTOP, true)?;
+    wait_for_signal(Some(pid), signal::SIGSTOP, InitialCont::Yes)?;
 
     ptrace::setregs(pid, regs_bak).unwrap();
     ptrace::syscall(pid, None).unwrap();
diff --git a/src/tools/miri/src/shims/native_lib/trace/stub.rs b/src/tools/miri/src/shims/native_lib/trace/stub.rs
new file mode 100644
index 00000000000..22787a6f6fa
--- /dev/null
+++ b/src/tools/miri/src/shims/native_lib/trace/stub.rs
@@ -0,0 +1,34 @@
+use rustc_const_eval::interpret::InterpResult;
+
+static SUPERVISOR: std::sync::Mutex<()> = std::sync::Mutex::new(());
+
+pub struct Supervisor;
+
+#[derive(Debug)]
+pub struct SvInitError;
+
+impl Supervisor {
+    #[inline(always)]
+    pub fn is_enabled() -> bool {
+        false
+    }
+
+    pub fn do_ffi<'tcx, T>(
+        _: T,
+        f: impl FnOnce() -> InterpResult<'tcx, crate::ImmTy<'tcx>>,
+    ) -> InterpResult<'tcx, (crate::ImmTy<'tcx>, Option<super::MemEvents>)> {
+        // We acquire the lock to ensure that no two FFI calls run concurrently.
+        let _g = SUPERVISOR.lock().unwrap();
+        f().map(|v| (v, None))
+    }
+}
+
+#[inline(always)]
+#[allow(dead_code, clippy::missing_safety_doc)]
+pub unsafe fn init_sv() -> Result<!, SvInitError> {
+    Err(SvInitError)
+}
+
+#[inline(always)]
+#[allow(dead_code)]
+pub fn register_retcode_sv<T>(_: T) {}
diff --git a/src/tools/miri/src/shims/panic.rs b/src/tools/miri/src/shims/panic.rs
index 9490761d0c9..85564e47685 100644
--- a/src/tools/miri/src/shims/panic.rs
+++ b/src/tools/miri/src/shims/panic.rs
@@ -1,162 +1,12 @@
-//! Panic runtime for Miri.
-//!
-//! The core pieces of the runtime are:
-//! - An implementation of `__rust_maybe_catch_panic` that pushes the invoked stack frame with
-//!   some extra metadata derived from the panic-catching arguments of `__rust_maybe_catch_panic`.
-//! - A hack in `libpanic_unwind` that calls the `miri_start_unwind` intrinsic instead of the
-//!   target-native panic runtime. (This lives in the rustc repo.)
-//! - An implementation of `miri_start_unwind` that stores its argument (the panic payload), and then
-//!   immediately returns, but on the *unwind* edge (not the normal return edge), thus initiating unwinding.
-//! - A hook executed each time a frame is popped, such that if the frame pushed by `__rust_maybe_catch_panic`
-//!   gets popped *during unwinding*, we take the panic payload and store it according to the extra
-//!   metadata we remembered when pushing said frame.
+//! Helper functions for causing panics.
 
 use rustc_abi::ExternAbi;
 use rustc_middle::{mir, ty};
-use rustc_target::spec::PanicStrategy;
 
-use self::helpers::check_intrinsic_arg_count;
 use crate::*;
 
-/// Holds all of the relevant data for when unwinding hits a `try` frame.
-#[derive(Debug)]
-pub struct CatchUnwindData<'tcx> {
-    /// The `catch_fn` callback to call in case of a panic.
-    catch_fn: Pointer,
-    /// The `data` argument for that callback.
-    data: ImmTy<'tcx>,
-    /// The return place from the original call to `try`.
-    dest: MPlaceTy<'tcx>,
-    /// The return block from the original call to `try`.
-    ret: Option<mir::BasicBlock>,
-}
-
-impl VisitProvenance for CatchUnwindData<'_> {
-    fn visit_provenance(&self, visit: &mut VisitWith<'_>) {
-        let CatchUnwindData { catch_fn, data, dest, ret: _ } = self;
-        catch_fn.visit_provenance(visit);
-        data.visit_provenance(visit);
-        dest.visit_provenance(visit);
-    }
-}
-
 impl<'tcx> EvalContextExt<'tcx> for crate::MiriInterpCx<'tcx> {}
 pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
-    /// Handles the special `miri_start_unwind` intrinsic, which is called
-    /// by libpanic_unwind to delegate the actual unwinding process to Miri.
-    fn handle_miri_start_unwind(&mut self, payload: &OpTy<'tcx>) -> InterpResult<'tcx> {
-        let this = self.eval_context_mut();
-
-        trace!("miri_start_unwind: {:?}", this.frame().instance());
-
-        let payload = this.read_immediate(payload)?;
-        let thread = this.active_thread_mut();
-        thread.panic_payloads.push(payload);
-
-        interp_ok(())
-    }
-
-    /// Handles the `catch_unwind` intrinsic.
-    fn handle_catch_unwind(
-        &mut self,
-        args: &[OpTy<'tcx>],
-        dest: &MPlaceTy<'tcx>,
-        ret: Option<mir::BasicBlock>,
-    ) -> InterpResult<'tcx> {
-        let this = self.eval_context_mut();
-
-        // Signature:
-        //   fn catch_unwind(try_fn: fn(*mut u8), data: *mut u8, catch_fn: fn(*mut u8, *mut u8)) -> i32
-        // Calls `try_fn` with `data` as argument. If that executes normally, returns 0.
-        // If that unwinds, calls `catch_fn` with the first argument being `data` and
-        // then second argument being a target-dependent `payload` (i.e. it is up to us to define
-        // what that is), and returns 1.
-        // The `payload` is passed (by libstd) to `__rust_panic_cleanup`, which is then expected to
-        // return a `Box<dyn Any + Send + 'static>`.
-        // In Miri, `miri_start_unwind` is passed exactly that type, so we make the `payload` simply
-        // a pointer to `Box<dyn Any + Send + 'static>`.
-
-        // Get all the arguments.
-        let [try_fn, data, catch_fn] = check_intrinsic_arg_count(args)?;
-        let try_fn = this.read_pointer(try_fn)?;
-        let data = this.read_immediate(data)?;
-        let catch_fn = this.read_pointer(catch_fn)?;
-
-        // Now we make a function call, and pass `data` as first and only argument.
-        let f_instance = this.get_ptr_fn(try_fn)?.as_instance()?;
-        trace!("try_fn: {:?}", f_instance);
-        #[allow(clippy::cloned_ref_to_slice_refs)] // the code is clearer as-is
-        this.call_function(
-            f_instance,
-            ExternAbi::Rust,
-            &[data.clone()],
-            None,
-            // Directly return to caller.
-            ReturnContinuation::Goto { ret, unwind: mir::UnwindAction::Continue },
-        )?;
-
-        // We ourselves will return `0`, eventually (will be overwritten if we catch a panic).
-        this.write_null(dest)?;
-
-        // In unwind mode, we tag this frame with the extra data needed to catch unwinding.
-        // This lets `handle_stack_pop` (below) know that we should stop unwinding
-        // when we pop this frame.
-        if this.tcx.sess.panic_strategy() == PanicStrategy::Unwind {
-            this.frame_mut().extra.catch_unwind =
-                Some(CatchUnwindData { catch_fn, data, dest: dest.clone(), ret });
-        }
-
-        interp_ok(())
-    }
-
-    fn handle_stack_pop_unwind(
-        &mut self,
-        mut extra: FrameExtra<'tcx>,
-        unwinding: bool,
-    ) -> InterpResult<'tcx, ReturnAction> {
-        let this = self.eval_context_mut();
-        trace!("handle_stack_pop_unwind(extra = {:?}, unwinding = {})", extra, unwinding);
-
-        // We only care about `catch_panic` if we're unwinding - if we're doing a normal
-        // return, then we don't need to do anything special.
-        if let (true, Some(catch_unwind)) = (unwinding, extra.catch_unwind.take()) {
-            // We've just popped a frame that was pushed by `catch_unwind`,
-            // and we are unwinding, so we should catch that.
-            trace!(
-                "unwinding: found catch_panic frame during unwinding: {:?}",
-                this.frame().instance()
-            );
-
-            // We set the return value of `catch_unwind` to 1, since there was a panic.
-            this.write_scalar(Scalar::from_i32(1), &catch_unwind.dest)?;
-
-            // The Thread's `panic_payload` holds what was passed to `miri_start_unwind`.
-            // This is exactly the second argument we need to pass to `catch_fn`.
-            let payload = this.active_thread_mut().panic_payloads.pop().unwrap();
-
-            // Push the `catch_fn` stackframe.
-            let f_instance = this.get_ptr_fn(catch_unwind.catch_fn)?.as_instance()?;
-            trace!("catch_fn: {:?}", f_instance);
-            this.call_function(
-                f_instance,
-                ExternAbi::Rust,
-                &[catch_unwind.data, payload],
-                None,
-                // Directly return to caller of `catch_unwind`.
-                ReturnContinuation::Goto {
-                    ret: catch_unwind.ret,
-                    // `catch_fn` must not unwind.
-                    unwind: mir::UnwindAction::Unreachable,
-                },
-            )?;
-
-            // We pushed a new stack frame, the engine should not do any jumping now!
-            interp_ok(ReturnAction::NoJump)
-        } else {
-            interp_ok(ReturnAction::Normal)
-        }
-    }
-
     /// Start a panic in the interpreter with the given message as payload.
     fn start_panic(&mut self, msg: &str, unwind: mir::UnwindAction) -> InterpResult<'tcx> {
         let this = self.eval_context_mut();
diff --git a/src/tools/miri/src/shims/tls.rs b/src/tools/miri/src/shims/tls.rs
index 7182637437a..1200029692d 100644
--- a/src/tools/miri/src/shims/tls.rs
+++ b/src/tools/miri/src/shims/tls.rs
@@ -302,7 +302,7 @@ trait EvalContextPrivExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
 
         // Windows has a special magic linker section that is run on certain events.
         // We don't support most of that, but just enough to make thread-local dtors in `std` work.
-        interp_ok(this.lookup_link_section(".CRT$XLB")?)
+        interp_ok(this.lookup_link_section(|section| section == ".CRT$XLB")?)
     }
 
     fn schedule_windows_tls_dtor(&mut self, dtor: ImmTy<'tcx>) -> InterpResult<'tcx> {
diff --git a/src/tools/miri/src/shims/unix/fs.rs b/src/tools/miri/src/shims/unix/fs.rs
index 0f7d453b296..0f2878ad26c 100644
--- a/src/tools/miri/src/shims/unix/fs.rs
+++ b/src/tools/miri/src/shims/unix/fs.rs
@@ -132,12 +132,12 @@ trait EvalContextExtPrivate<'tcx>: crate::MiriInterpCxExt<'tcx> {
         let buf = this.deref_pointer_as(buf_op, this.libc_ty_layout("stat"))?;
         this.write_int_fields_named(
             &[
-                ("st_dev", 0),
+                ("st_dev", metadata.dev.into()),
                 ("st_mode", mode.try_into().unwrap()),
                 ("st_nlink", 0),
                 ("st_ino", 0),
-                ("st_uid", 0),
-                ("st_gid", 0),
+                ("st_uid", metadata.uid.into()),
+                ("st_gid", metadata.gid.into()),
                 ("st_rdev", 0),
                 ("st_atime", access_sec.into()),
                 ("st_mtime", modified_sec.into()),
@@ -1544,6 +1544,9 @@ struct FileMetadata {
     created: Option<(u64, u32)>,
     accessed: Option<(u64, u32)>,
     modified: Option<(u64, u32)>,
+    dev: u64,
+    uid: u32,
+    gid: u32,
 }
 
 impl FileMetadata {
@@ -1601,6 +1604,21 @@ impl FileMetadata {
         let modified = extract_sec_and_nsec(metadata.modified())?;
 
         // FIXME: Provide more fields using platform specific methods.
-        interp_ok(Ok(FileMetadata { mode, size, created, accessed, modified }))
+
+        cfg_select! {
+            unix => {
+                use std::os::unix::fs::MetadataExt;
+                let dev = metadata.dev();
+                let uid = metadata.uid();
+                let gid = metadata.gid();
+            }
+            _ => {
+                let dev = 0;
+                let uid = 0;
+                let gid = 0;
+            }
+        }
+
+        interp_ok(Ok(FileMetadata { mode, size, created, accessed, modified, dev, uid, gid }))
     }
 }
diff --git a/src/tools/miri/src/shims/unwind.rs b/src/tools/miri/src/shims/unwind.rs
new file mode 100644
index 00000000000..ba0c50b54b4
--- /dev/null
+++ b/src/tools/miri/src/shims/unwind.rs
@@ -0,0 +1,160 @@
+//! Unwinding runtime for Miri.
+//!
+//! The core pieces of the runtime are:
+//! - An implementation of `catch_unwind` that pushes the invoked stack frame with
+//!   some extra metadata derived from the panic-catching arguments of `catch_unwind`.
+//! - A hack in `libpanic_unwind` that calls the `miri_start_unwind` intrinsic instead of the
+//!   target-native panic runtime. (This lives in the rustc repo.)
+//! - An implementation of `miri_start_unwind` that stores its argument (the panic payload), and
+//!   then immediately returns, but on the *unwind* edge (not the normal return edge), thus
+//!   initiating unwinding.
+//! - A hook executed each time a frame is popped, such that if the frame pushed by `catch_unwind`
+//!   gets popped *during unwinding*, we take the panic payload and store it according to the extra
+//!   metadata we remembered when pushing said frame.
+
+use rustc_abi::ExternAbi;
+use rustc_middle::mir;
+use rustc_target::spec::PanicStrategy;
+
+use self::helpers::check_intrinsic_arg_count;
+use crate::*;
+
+/// Holds all of the relevant data for when unwinding hits a `try` frame.
+#[derive(Debug)]
+pub struct CatchUnwindData<'tcx> {
+    /// The `catch_fn` callback to call in case of a panic.
+    catch_fn: Pointer,
+    /// The `data` argument for that callback.
+    data: ImmTy<'tcx>,
+    /// The return place from the original call to `try`.
+    dest: MPlaceTy<'tcx>,
+    /// The return block from the original call to `try`.
+    ret: Option<mir::BasicBlock>,
+}
+
+impl VisitProvenance for CatchUnwindData<'_> {
+    fn visit_provenance(&self, visit: &mut VisitWith<'_>) {
+        let CatchUnwindData { catch_fn, data, dest, ret: _ } = self;
+        catch_fn.visit_provenance(visit);
+        data.visit_provenance(visit);
+        dest.visit_provenance(visit);
+    }
+}
+
+impl<'tcx> EvalContextExt<'tcx> for crate::MiriInterpCx<'tcx> {}
+pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
+    /// Handles the special `miri_start_unwind` intrinsic, which is called
+    /// by libpanic_unwind to delegate the actual unwinding process to Miri.
+    fn handle_miri_start_unwind(&mut self, payload: &OpTy<'tcx>) -> InterpResult<'tcx> {
+        let this = self.eval_context_mut();
+
+        trace!("miri_start_unwind: {:?}", this.frame().instance());
+
+        let payload = this.read_immediate(payload)?;
+        let thread = this.active_thread_mut();
+        thread.unwind_payloads.push(payload);
+
+        interp_ok(())
+    }
+
+    /// Handles the `catch_unwind` intrinsic.
+    fn handle_catch_unwind(
+        &mut self,
+        args: &[OpTy<'tcx>],
+        dest: &MPlaceTy<'tcx>,
+        ret: Option<mir::BasicBlock>,
+    ) -> InterpResult<'tcx> {
+        let this = self.eval_context_mut();
+
+        // Signature:
+        //   fn catch_unwind(try_fn: fn(*mut u8), data: *mut u8, catch_fn: fn(*mut u8, *mut u8)) -> i32
+        // Calls `try_fn` with `data` as argument. If that executes normally, returns 0.
+        // If that unwinds, calls `catch_fn` with the first argument being `data` and
+        // then second argument being a target-dependent `payload` (i.e. it is up to us to define
+        // what that is), and returns 1.
+        // The `payload` is passed (by libstd) to `__rust_panic_cleanup`, which is then expected to
+        // return a `Box<dyn Any + Send + 'static>`.
+        // In Miri, `miri_start_unwind` is passed exactly that type, so we make the `payload` simply
+        // a pointer to `Box<dyn Any + Send + 'static>`.
+
+        // Get all the arguments.
+        let [try_fn, data, catch_fn] = check_intrinsic_arg_count(args)?;
+        let try_fn = this.read_pointer(try_fn)?;
+        let data = this.read_immediate(data)?;
+        let catch_fn = this.read_pointer(catch_fn)?;
+
+        // Now we make a function call, and pass `data` as first and only argument.
+        let f_instance = this.get_ptr_fn(try_fn)?.as_instance()?;
+        trace!("try_fn: {:?}", f_instance);
+        #[allow(clippy::cloned_ref_to_slice_refs)] // the code is clearer as-is
+        this.call_function(
+            f_instance,
+            ExternAbi::Rust,
+            &[data.clone()],
+            None,
+            // Directly return to caller.
+            ReturnContinuation::Goto { ret, unwind: mir::UnwindAction::Continue },
+        )?;
+
+        // We ourselves will return `0`, eventually (will be overwritten if we catch a panic).
+        this.write_null(dest)?;
+
+        // In unwind mode, we tag this frame with the extra data needed to catch unwinding.
+        // This lets `handle_stack_pop` (below) know that we should stop unwinding
+        // when we pop this frame.
+        if this.tcx.sess.panic_strategy() == PanicStrategy::Unwind {
+            this.frame_mut().extra.catch_unwind =
+                Some(CatchUnwindData { catch_fn, data, dest: dest.clone(), ret });
+        }
+
+        interp_ok(())
+    }
+
+    fn handle_stack_pop_unwind(
+        &mut self,
+        mut extra: FrameExtra<'tcx>,
+        unwinding: bool,
+    ) -> InterpResult<'tcx, ReturnAction> {
+        let this = self.eval_context_mut();
+        trace!("handle_stack_pop_unwind(extra = {:?}, unwinding = {})", extra, unwinding);
+
+        // We only care about `catch_panic` if we're unwinding - if we're doing a normal
+        // return, then we don't need to do anything special.
+        if let (true, Some(catch_unwind)) = (unwinding, extra.catch_unwind.take()) {
+            // We've just popped a frame that was pushed by `catch_unwind`,
+            // and we are unwinding, so we should catch that.
+            trace!(
+                "unwinding: found catch_panic frame during unwinding: {:?}",
+                this.frame().instance()
+            );
+
+            // We set the return value of `catch_unwind` to 1, since there was a panic.
+            this.write_scalar(Scalar::from_i32(1), &catch_unwind.dest)?;
+
+            // The Thread's `panic_payload` holds what was passed to `miri_start_unwind`.
+            // This is exactly the second argument we need to pass to `catch_fn`.
+            let payload = this.active_thread_mut().unwind_payloads.pop().unwrap();
+
+            // Push the `catch_fn` stackframe.
+            let f_instance = this.get_ptr_fn(catch_unwind.catch_fn)?.as_instance()?;
+            trace!("catch_fn: {:?}", f_instance);
+            this.call_function(
+                f_instance,
+                ExternAbi::Rust,
+                &[catch_unwind.data, payload],
+                None,
+                // Directly return to caller of `catch_unwind`.
+                ReturnContinuation::Goto {
+                    ret: catch_unwind.ret,
+                    // `catch_fn` must not unwind.
+                    unwind: mir::UnwindAction::Unreachable,
+                },
+            )?;
+
+            // We pushed a new stack frame, the engine should not do any jumping now!
+            interp_ok(ReturnAction::NoJump)
+        } else {
+            interp_ok(ReturnAction::Normal)
+        }
+    }
+}
diff --git a/src/tools/miri/test_dependencies/Cargo.lock b/src/tools/miri/tests/deps/Cargo.lock
index 276c518e74f..4b783ebdc4e 100644
--- a/src/tools/miri/test_dependencies/Cargo.lock
+++ b/src/tools/miri/tests/deps/Cargo.lock
@@ -13,15 +13,15 @@ dependencies = [
 
 [[package]]
 name = "adler2"
-version = "2.0.0"
+version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "512761e0bb2578dd7380c6baaa0f4ce03e84f95e960231d1dec8bf4d7d6e2627"
+checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
 
 [[package]]
 name = "backtrace"
-version = "0.3.74"
+version = "0.3.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d82cb332cdfaed17ae235a638438ac4d4839913cc2af585c3c6746e8f8bee1a"
+checksum = "6806a6321ec58106fea15becdad98371e28d92ccbc7c8f1b3b6dd724fe8f1002"
 dependencies = [
  "addr2line",
  "cfg-if",
@@ -29,20 +29,20 @@ dependencies = [
  "miniz_oxide",
  "object",
  "rustc-demangle",
- "windows-targets",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
 name = "bitflags"
-version = "2.9.0"
+version = "2.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c8214115b7bf84099f1309324e63141d4c5d7cc26862f97a0a857dbefe165bd"
+checksum = "1b8e56985ec62d17e9c1001dc89c88ecd7dc08e47eba5ec7c29c7b5eeecde967"
 
 [[package]]
 name = "bumpalo"
-version = "3.17.0"
+version = "3.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1628fb46dfa0b37568d12e5edd512553eccf6a22a78e8bde00bb4aed84d5bdbf"
+checksum = "46c5e41b57b8bba42a04676d81cb89e9ee8e859a1a66f80a5a72e1cb76b34d43"
 
 [[package]]
 name = "bytes"
@@ -52,18 +52,18 @@ checksum = "d71b6127be86fdcfddb610f7182ac57211d4b18a3e9c82eb2d17662f2227ad6a"
 
 [[package]]
 name = "cfg-if"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+checksum = "9555578bc9e57714c812a1f84e4fc5b4d21fcb063490c624de019f7464c91268"
 
 [[package]]
 name = "errno"
-version = "0.3.11"
+version = "0.3.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "976dd42dc7e85965fe702eb8164f21f450704bdde31faefd6471dba214cb594e"
+checksum = "778e2ac28f6c47af28e4907f13ffd1e1ddbd400980a9abd7c8df189bf578a5ad"
 dependencies = [
  "libc",
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -85,22 +85,22 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.15"
+version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
+checksum = "335ff9f135e4384c8150d6f27c6daed433577f86b4750418338c01a1a2528592"
 dependencies = [
  "cfg-if",
  "js-sys",
  "libc",
- "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasi 0.11.1+wasi-snapshot-preview1",
  "wasm-bindgen",
 ]
 
 [[package]]
 name = "getrandom"
-version = "0.3.2"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73fea8450eea4bac3940448fb7ae50d91f034f941199fcd9d909a5a07aa455f0"
+checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
 dependencies = [
  "cfg-if",
  "libc",
@@ -116,9 +116,20 @@ checksum = "07e28edb80900c19c28f1072f2e8aeca7fa06b23cd4169cefe1af5aa3260783f"
 
 [[package]]
 name = "hermit-abi"
-version = "0.3.9"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc0fef456e4baa96da950455cd02c081ca953b141298e41db3fc7e36b1da849c"
+
+[[package]]
+name = "io-uring"
+version = "0.7.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
+checksum = "b86e202f00093dcba4275d4636b93ef9dd75d025ae560d2521b45ea28ab49013"
+dependencies = [
+ "bitflags",
+ "cfg-if",
+ "libc",
+]
 
 [[package]]
 name = "js-sys"
@@ -132,15 +143,15 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.171"
+version = "0.2.174"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c19937216e9d3aa9956d9bb8dfc0b0c8beb6058fc4f7a4dc4d850edf86a237d6"
+checksum = "1171693293099992e19cddea4e8b849964e9846f4acee11b3948bcc337be8776"
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.9.3"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe7db12097d22ec582439daf8618b8fdd1a7bef6270e9af3b1ebcd30893cf413"
+checksum = "cd945864f07fe9f5371a27ad7b52a172b4b499999f1d97574c9fa68373937e12"
 
 [[package]]
 name = "log"
@@ -150,28 +161,28 @@ checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
 
 [[package]]
 name = "memchr"
-version = "2.7.4"
+version = "2.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+checksum = "32a282da65faaf38286cf3be983213fcf1d2e2a58700e808f83f4ea9a4804bc0"
 
 [[package]]
 name = "miniz_oxide"
-version = "0.8.8"
+version = "0.8.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3be647b768db090acb35d5ec5db2b0e1f1de11133ca123b9eacf5137868f892a"
+checksum = "1fa76a2c86f704bdb222d66965fb3d63269ce38518b83cb0575fca855ebb6316"
 dependencies = [
  "adler2",
 ]
 
 [[package]]
 name = "mio"
-version = "1.0.3"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2886843bf800fba2e3377cff24abf6379b4c4d5c6681eaf9ea5b0d15090450bd"
+checksum = "78bed444cc8a2160f01cbcf811ef18cac863ad68ae8ca62092e8db51d51c761c"
 dependencies = [
  "libc",
- "wasi 0.11.0+wasi-snapshot-preview1",
- "windows-sys 0.52.0",
+ "wasi 0.11.1+wasi-snapshot-preview1",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -180,21 +191,21 @@ version = "0.1.0"
 dependencies = [
  "cfg-if",
  "getrandom 0.1.16",
- "getrandom 0.2.15",
- "getrandom 0.3.2",
+ "getrandom 0.2.16",
+ "getrandom 0.3.3",
  "libc",
  "num_cpus",
  "page_size",
  "tempfile",
  "tokio",
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
 name = "num_cpus"
-version = "1.16.0"
+version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
+checksum = "91df4bbde75afed763b708b7eee1e8e7651e02d97f6d5dd763e89367e957b23b"
 dependencies = [
  "hermit-abi",
  "libc",
@@ -233,9 +244,9 @@ checksum = "3b3cff922bd51709b605d9ead9aa71031d81447142d828eb4a6eba76fe619f9b"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.94"
+version = "1.0.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a31971752e70b8b2686d7e46ec17fb38dad4051d94024c88df49b667caea9c84"
+checksum = "02b3e5e68a3a1a02aad3ec490a98007cbc13c37cbe84a3cd7b8e406d76e7f778"
 dependencies = [
  "unicode-ident",
 ]
@@ -251,43 +262,49 @@ dependencies = [
 
 [[package]]
 name = "r-efi"
-version = "5.2.0"
+version = "5.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74765f6d916ee2faa39bc8e68e4f3ed8949b48cccdac59983d287a7cb71ce9c5"
+checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
 
 [[package]]
 name = "rustc-demangle"
-version = "0.1.24"
+version = "0.1.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "719b953e2095829ee67db738b3bfa9fa368c94900df327b3f07fe6e794d2fe1f"
+checksum = "989e6739f80c4ad5b13e0fd7fe89531180375b18520cc8c82080e4dc4035b84f"
 
 [[package]]
 name = "rustix"
-version = "1.0.5"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d97817398dd4bb2e6da002002db259209759911da105da92bec29ccb12cf58bf"
+checksum = "11181fbabf243db407ef8df94a6ce0b2f9a733bd8be4ad02b4eda9602296cac8"
 dependencies = [
  "bitflags",
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
 name = "signal-hook-registry"
-version = "1.4.2"
+version = "1.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9e9e0b4211b72e7b8b6e85c807d36c212bdb33ea8587f7569562a84df5465b1"
+checksum = "9203b8055f63a2a00e2f593bb0510367fe707d7ff1e5c872de2f537b339e5410"
 dependencies = [
  "libc",
 ]
 
 [[package]]
+name = "slab"
+version = "0.4.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04dc19736151f35336d325007ac991178d504a119863a2fcb3758cdb5e52c50d"
+
+[[package]]
 name = "socket2"
-version = "0.5.9"
+version = "0.5.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f5fd57c80058a56cf5c777ab8a126398ece8e442983605d280a44ce79d0edef"
+checksum = "e22376abed350d73dd1cd119b57ffccad95b4e585a7cda43e286245ce23c0678"
 dependencies = [
  "libc",
  "windows-sys 0.52.0",
@@ -295,9 +312,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.100"
+version = "2.0.104"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
+checksum = "17b6f705963418cdb9927482fa304bc562ece2fdd4f616084c50b7023b435a40"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -306,12 +323,12 @@ dependencies = [
 
 [[package]]
 name = "tempfile"
-version = "3.19.1"
+version = "3.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7437ac7763b9b123ccf33c338a5cc1bac6f69b45a136c19bdd8a65e3916435bf"
+checksum = "e8a64e3985349f2441a1a9ef0b853f869006c3855f2cda6862a94d26ebb9d6a1"
 dependencies = [
  "fastrand",
- "getrandom 0.3.2",
+ "getrandom 0.3.3",
  "once_cell",
  "rustix",
  "windows-sys 0.59.0",
@@ -319,16 +336,18 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "1.44.2"
+version = "1.46.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6b88822cbe49de4185e3a4cbf8321dd487cf5fe0c5c65695fef6346371e9c48"
+checksum = "0cc3a2344dafbe23a245241fe8b09735b521110d30fcefbbd5feb1797ca35d17"
 dependencies = [
  "backtrace",
  "bytes",
+ "io-uring",
  "libc",
  "mio",
  "pin-project-lite",
  "signal-hook-registry",
+ "slab",
  "socket2",
  "tokio-macros",
  "windows-sys 0.52.0",
@@ -359,9 +378,9 @@ checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 
 [[package]]
 name = "wasi"
-version = "0.11.0+wasi-snapshot-preview1"
+version = "0.11.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
 [[package]]
 name = "wasi"
@@ -457,7 +476,7 @@ version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -466,7 +485,16 @@ version = "0.59.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.52.6",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.60.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
+dependencies = [
+ "windows-targets 0.53.2",
 ]
 
 [[package]]
@@ -475,14 +503,30 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
 dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_gnullvm",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
+ "windows_aarch64_gnullvm 0.52.6",
+ "windows_aarch64_msvc 0.52.6",
+ "windows_i686_gnu 0.52.6",
+ "windows_i686_gnullvm 0.52.6",
+ "windows_i686_msvc 0.52.6",
+ "windows_x86_64_gnu 0.52.6",
+ "windows_x86_64_gnullvm 0.52.6",
+ "windows_x86_64_msvc 0.52.6",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.53.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c66f69fcc9ce11da9966ddb31a40968cad001c5bedeb5c2b82ede4253ab48aef"
+dependencies = [
+ "windows_aarch64_gnullvm 0.53.0",
+ "windows_aarch64_msvc 0.53.0",
+ "windows_i686_gnu 0.53.0",
+ "windows_i686_gnullvm 0.53.0",
+ "windows_i686_msvc 0.53.0",
+ "windows_x86_64_gnu 0.53.0",
+ "windows_x86_64_gnullvm 0.53.0",
+ "windows_x86_64_msvc 0.53.0",
 ]
 
 [[package]]
@@ -492,48 +536,96 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
 [[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86b8d5f90ddd19cb4a147a5fa63ca848db3df085e25fee3cc10b39b6eebae764"
+
+[[package]]
 name = "windows_aarch64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
 [[package]]
+name = "windows_aarch64_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7651a1f62a11b8cbd5e0d42526e55f2c99886c77e007179efff86c2b137e66c"
+
+[[package]]
 name = "windows_i686_gnu"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
 
 [[package]]
+name = "windows_i686_gnu"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1dc67659d35f387f5f6c479dc4e28f1d4bb90ddd1a5d3da2e5d97b42d6272c3"
+
+[[package]]
 name = "windows_i686_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
 [[package]]
+name = "windows_i686_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ce6ccbdedbf6d6354471319e781c0dfef054c81fbc7cf83f338a4296c0cae11"
+
+[[package]]
 name = "windows_i686_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
 [[package]]
+name = "windows_i686_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "581fee95406bb13382d2f65cd4a908ca7b1e4c2f1917f143ba16efe98a589b5d"
+
+[[package]]
 name = "windows_x86_64_gnu"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
 [[package]]
+name = "windows_x86_64_gnu"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e55b5ac9ea33f2fc1716d1742db15574fd6fc8dadc51caab1c16a3d3b4190ba"
+
+[[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
 [[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a6e035dd0599267ce1ee132e51c27dd29437f63325753051e71dd9e42406c57"
+
+[[package]]
 name = "windows_x86_64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
 [[package]]
+name = "windows_x86_64_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
+
+[[package]]
 name = "wit-bindgen-rt"
 version = "0.39.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/src/tools/miri/test_dependencies/Cargo.toml b/src/tools/miri/tests/deps/Cargo.toml
index fa833b51fa3..d85723f0915 100644
--- a/src/tools/miri/test_dependencies/Cargo.toml
+++ b/src/tools/miri/tests/deps/Cargo.toml
@@ -25,7 +25,7 @@ page_size = "0.6"
 tokio = { version = "1", features = ["macros", "rt-multi-thread", "time", "net", "fs", "sync", "signal", "io-util"] }
 
 [target.'cfg(windows)'.dependencies]
-windows-sys = { version = "0.59", features = [
+windows-sys = { version = "0.60", features = [
     "Win32_Foundation",
     "Win32_System_Threading",
     "Win32_Storage_FileSystem",
@@ -34,4 +34,5 @@ windows-sys = { version = "0.59", features = [
     "Wdk_Storage_FileSystem",
 ] }
 
+# Make sure we are not part of the rustc workspace.
 [workspace]
diff --git a/src/tools/miri/tests/deps/src/main.rs b/src/tools/miri/tests/deps/src/main.rs
new file mode 100644
index 00000000000..f328e4d9d04
--- /dev/null
+++ b/src/tools/miri/tests/deps/src/main.rs
@@ -0,0 +1 @@
+fn main() {}
diff --git a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_cond_double_destroy.rs b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_cond_double_destroy.rs
index 047fe07df14..5778765589d 100644
--- a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_cond_double_destroy.rs
+++ b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_cond_double_destroy.rs
@@ -1,4 +1,6 @@
 //@ignore-target: windows # No pthreads on Windows
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
 
 /// Test that destroying a pthread_cond twice fails, even without a check for number validity
 
@@ -15,6 +17,6 @@ fn main() {
         libc::pthread_cond_destroy(cond.as_mut_ptr());
 
         libc::pthread_cond_destroy(cond.as_mut_ptr());
-        //~^ ERROR: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+        //~^ ERROR: /Undefined Behavior: reading memory .*, but memory is uninitialized/
     }
 }
diff --git a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_cond_double_destroy.stderr b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_cond_double_destroy.stderr
index 7abdfa87f75..6156070cf95 100644
--- a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_cond_double_destroy.stderr
+++ b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_cond_double_destroy.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail-dep/concurrency/libc_pthread_cond_double_destroy.rs:LL:CC
    |
 LL |         libc::pthread_cond_destroy(cond.as_mut_ptr());
@@ -9,6 +9,9 @@ LL |         libc::pthread_cond_destroy(cond.as_mut_ptr());
    = note: BACKTRACE:
    = note: inside `main` at tests/fail-dep/concurrency/libc_pthread_cond_double_destroy.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_condattr_double_destroy.rs b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_condattr_double_destroy.rs
index 90e33d58673..91169660491 100644
--- a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_condattr_double_destroy.rs
+++ b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_condattr_double_destroy.rs
@@ -1,5 +1,7 @@
 //@ignore-target: windows # No pthreads on Windows
 //@ignore-target: apple # Our macOS condattr don't have any fields so we do not notice this.
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
 
 /// Test that destroying a pthread_condattr twice fails, even without a check for number validity
 
@@ -13,6 +15,6 @@ fn main() {
         libc::pthread_condattr_destroy(attr.as_mut_ptr());
 
         libc::pthread_condattr_destroy(attr.as_mut_ptr());
-        //~^ ERROR: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+        //~^ ERROR: /Undefined Behavior: reading memory .*, but memory is uninitialized/
     }
 }
diff --git a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_condattr_double_destroy.stderr b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_condattr_double_destroy.stderr
index 28a66253ae8..da64970ff2e 100644
--- a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_condattr_double_destroy.stderr
+++ b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_condattr_double_destroy.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail-dep/concurrency/libc_pthread_condattr_double_destroy.rs:LL:CC
    |
 LL |         libc::pthread_condattr_destroy(attr.as_mut_ptr());
@@ -9,6 +9,9 @@ LL |         libc::pthread_condattr_destroy(attr.as_mut_ptr());
    = note: BACKTRACE:
    = note: inside `main` at tests/fail-dep/concurrency/libc_pthread_condattr_double_destroy.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutex_double_destroy.rs b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutex_double_destroy.rs
index 1792c227e13..f04fe8be6b3 100644
--- a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutex_double_destroy.rs
+++ b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutex_double_destroy.rs
@@ -1,4 +1,6 @@
 //@ignore-target: windows # No pthreads on Windows
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
 
 /// Test that destroying a pthread_mutex twice fails, even without a check for number validity
 
@@ -16,6 +18,6 @@ fn main() {
         libc::pthread_mutex_destroy(mutex.as_mut_ptr());
 
         libc::pthread_mutex_destroy(mutex.as_mut_ptr());
-        //~^ ERROR: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+        //~^ ERROR: /Undefined Behavior: reading memory .*, but memory is uninitialized/
     }
 }
diff --git a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutex_double_destroy.stderr b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutex_double_destroy.stderr
index e7a6dee0203..05db823b252 100644
--- a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutex_double_destroy.stderr
+++ b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutex_double_destroy.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail-dep/concurrency/libc_pthread_mutex_double_destroy.rs:LL:CC
    |
 LL |         libc::pthread_mutex_destroy(mutex.as_mut_ptr());
@@ -9,6 +9,9 @@ LL |         libc::pthread_mutex_destroy(mutex.as_mut_ptr());
    = note: BACKTRACE:
    = note: inside `main` at tests/fail-dep/concurrency/libc_pthread_mutex_double_destroy.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutexattr_double_destroy.rs b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutexattr_double_destroy.rs
index 3711c1f8dc1..d9daf5259bb 100644
--- a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutexattr_double_destroy.rs
+++ b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutexattr_double_destroy.rs
@@ -1,4 +1,6 @@
 //@ignore-target: windows # No pthreads on Windows
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
 
 /// Test that destroying a pthread_mutexattr twice fails, even without a check for number validity
 
@@ -12,6 +14,6 @@ fn main() {
         libc::pthread_mutexattr_destroy(attr.as_mut_ptr());
 
         libc::pthread_mutexattr_destroy(attr.as_mut_ptr());
-        //~^ ERROR: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+        //~^ ERROR: /Undefined Behavior: reading memory .*, but memory is uninitialized/
     }
 }
diff --git a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutexattr_double_destroy.stderr b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutexattr_double_destroy.stderr
index 0c9ee71de45..ee3883de36b 100644
--- a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutexattr_double_destroy.stderr
+++ b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_mutexattr_double_destroy.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail-dep/concurrency/libc_pthread_mutexattr_double_destroy.rs:LL:CC
    |
 LL |         libc::pthread_mutexattr_destroy(attr.as_mut_ptr());
@@ -9,6 +9,9 @@ LL |         libc::pthread_mutexattr_destroy(attr.as_mut_ptr());
    = note: BACKTRACE:
    = note: inside `main` at tests/fail-dep/concurrency/libc_pthread_mutexattr_double_destroy.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_rwlock_double_destroy.rs b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_rwlock_double_destroy.rs
index 6a31e972e68..720ba71d238 100644
--- a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_rwlock_double_destroy.rs
+++ b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_rwlock_double_destroy.rs
@@ -1,4 +1,6 @@
 //@ignore-target: windows # No pthreads on Windows
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
 
 /// Test that destroying a pthread_rwlock twice fails, even without a check for number validity
 
@@ -9,6 +11,6 @@ fn main() {
         libc::pthread_rwlock_destroy(&mut lock);
 
         libc::pthread_rwlock_destroy(&mut lock);
-        //~^ ERROR: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+        //~^ ERROR: /Undefined Behavior: reading memory .*, but memory is uninitialized/
     }
 }
diff --git a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_rwlock_double_destroy.stderr b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_rwlock_double_destroy.stderr
index 836f0d060bd..430398dc8fd 100644
--- a/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_rwlock_double_destroy.stderr
+++ b/src/tools/miri/tests/fail-dep/concurrency/libc_pthread_rwlock_double_destroy.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail-dep/concurrency/libc_pthread_rwlock_double_destroy.rs:LL:CC
    |
 LL |         libc::pthread_rwlock_destroy(&mut lock);
@@ -9,6 +9,9 @@ LL |         libc::pthread_rwlock_destroy(&mut lock);
    = note: BACKTRACE:
    = note: inside `main` at tests/fail-dep/concurrency/libc_pthread_rwlock_double_destroy.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/dangling_pointers/out_of_bounds_read_neg_offset.rs b/src/tools/miri/tests/fail/dangling_pointers/out_of_bounds_read_neg_offset.rs
new file mode 100644
index 00000000000..107a3db91d8
--- /dev/null
+++ b/src/tools/miri/tests/fail/dangling_pointers/out_of_bounds_read_neg_offset.rs
@@ -0,0 +1,6 @@
+fn main() {
+    let v: Vec<u16> = vec![1, 2];
+    // This read is also misaligned. We make sure that the OOB message has priority.
+    let x = unsafe { *v.as_ptr().wrapping_byte_sub(5) }; //~ ERROR: before the beginning of the allocation
+    panic!("this should never print: {}", x);
+}
diff --git a/src/tools/miri/tests/fail/dangling_pointers/out_of_bounds_read_neg_offset.stderr b/src/tools/miri/tests/fail/dangling_pointers/out_of_bounds_read_neg_offset.stderr
new file mode 100644
index 00000000000..5c37caa1ebf
--- /dev/null
+++ b/src/tools/miri/tests/fail/dangling_pointers/out_of_bounds_read_neg_offset.stderr
@@ -0,0 +1,21 @@
+error: Undefined Behavior: memory access failed: attempting to access 2 bytes, but got ALLOC-0x5 which points to before the beginning of the allocation
+  --> tests/fail/dangling_pointers/out_of_bounds_read_neg_offset.rs:LL:CC
+   |
+LL |     let x = unsafe { *v.as_ptr().wrapping_byte_sub(5) };
+   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Undefined Behavior occurred here
+   |
+   = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
+   = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
+help: ALLOC was allocated here:
+  --> tests/fail/dangling_pointers/out_of_bounds_read_neg_offset.rs:LL:CC
+   |
+LL |     let v: Vec<u16> = vec![1, 2];
+   |                       ^^^^^^^^^^
+   = note: BACKTRACE (of the first span):
+   = note: inside `main` at tests/fail/dangling_pointers/out_of_bounds_read_neg_offset.rs:LL:CC
+   = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
+
+error: aborting due to 1 previous error
+
diff --git a/src/tools/miri/tests/fail/function_calls/arg_inplace_observe_after.stderr b/src/tools/miri/tests/fail/function_calls/arg_inplace_observe_after.stderr
index 6a7d9a495f9..3252368ea6d 100644
--- a/src/tools/miri/tests/fail/function_calls/arg_inplace_observe_after.stderr
+++ b/src/tools/miri/tests/fail/function_calls/arg_inplace_observe_after.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0x0..0x4], but memory is uninitialized at [0x0..0x4], and this operation requires initialized memory
   --> tests/fail/function_calls/arg_inplace_observe_after.rs:LL:CC
    |
 LL |             _observe = non_copy.0;
@@ -9,6 +9,11 @@ LL |             _observe = non_copy.0;
    = note: BACKTRACE:
    = note: inside `main` at tests/fail/function_calls/arg_inplace_observe_after.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0x0..0x4], in this allocation:
+ALLOC (stack variable, size: 4, align: 4) {
+    __ __ __ __                                     │ ░░░░
+}
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/function_calls/arg_inplace_observe_during.none.stderr b/src/tools/miri/tests/fail/function_calls/arg_inplace_observe_during.none.stderr
index 0fc634bb7fc..09a5b9a6496 100644
--- a/src/tools/miri/tests/fail/function_calls/arg_inplace_observe_during.none.stderr
+++ b/src/tools/miri/tests/fail/function_calls/arg_inplace_observe_during.none.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0x0..0x4], but memory is uninitialized at [0x0..0x4], and this operation requires initialized memory
   --> tests/fail/function_calls/arg_inplace_observe_during.rs:LL:CC
    |
 LL |     unsafe { ptr.read() };
@@ -14,6 +14,11 @@ note: inside `main`
 LL |             Call(_unit = change_arg(Move(*ptr), ptr), ReturnTo(after_call), UnwindContinue())
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+Uninitialized memory occurred at ALLOC[0x0..0x4], in this allocation:
+ALLOC (stack variable, size: 4, align: 4) {
+    __ __ __ __                                     │ ░░░░
+}
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/function_calls/return_pointer_aliasing_read.none.stderr b/src/tools/miri/tests/fail/function_calls/return_pointer_aliasing_read.none.stderr
index 746ab2e59ca..24091547258 100644
--- a/src/tools/miri/tests/fail/function_calls/return_pointer_aliasing_read.none.stderr
+++ b/src/tools/miri/tests/fail/function_calls/return_pointer_aliasing_read.none.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0x0..0x4], but memory is uninitialized at [0x0..0x4], and this operation requires initialized memory
   --> tests/fail/function_calls/return_pointer_aliasing_read.rs:LL:CC
    |
 LL |     unsafe { ptr.read() };
@@ -14,6 +14,11 @@ note: inside `main`
 LL |             Call(*ptr = myfun(ptr), ReturnTo(after_call), UnwindContinue())
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+Uninitialized memory occurred at ALLOC[0x0..0x4], in this allocation:
+ALLOC (stack variable, size: 4, align: 4) {
+    __ __ __ __                                     │ ░░░░
+}
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/function_calls/return_pointer_on_unwind.stderr b/src/tools/miri/tests/fail/function_calls/return_pointer_on_unwind.stderr
index 7747a75d1cf..93720ca7d27 100644
--- a/src/tools/miri/tests/fail/function_calls/return_pointer_on_unwind.stderr
+++ b/src/tools/miri/tests/fail/function_calls/return_pointer_on_unwind.stderr
@@ -3,7 +3,7 @@ thread 'main' panicked at tests/fail/function_calls/return_pointer_on_unwind.rs:
 explicit panic
 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 note: in Miri, you may have to set `MIRIFLAGS=-Zmiri-env-forward=RUST_BACKTRACE` for the environment variable to have an effect
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0x0..0x4], but memory is uninitialized at [0x0..0x4], and this operation requires initialized memory
   --> tests/fail/function_calls/return_pointer_on_unwind.rs:LL:CC
    |
 LL |     dbg!(x.0);
@@ -15,6 +15,19 @@ LL |     dbg!(x.0);
    = note: inside `main` at RUSTLIB/std/src/macros.rs:LL:CC
    = note: this error originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info)
 
+Uninitialized memory occurred at ALLOC[0x0..0x4], in this allocation:
+ALLOC (stack variable, size: 132, align: 4) {
+    0x00 │ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░
+    0x10 │ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░
+    0x20 │ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░
+    0x30 │ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░
+    0x40 │ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░
+    0x50 │ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░
+    0x60 │ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░
+    0x70 │ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░
+    0x80 │ __ __ __ __                                     │ ░░░░
+}
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_data.rs b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_data.rs
index 0c305eed6e1..c03e468cfba 100644
--- a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_data.rs
+++ b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_data.rs
@@ -1,4 +1,7 @@
 //@compile-flags: -Zmiri-disable-validation
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
+
 #![feature(core_intrinsics, custom_mir)]
 use std::intrinsics::mir::*;
 
@@ -9,7 +12,7 @@ use std::intrinsics::mir::*;
 pub unsafe fn deref_meta(p: *const *const [i32]) -> usize {
     mir! {
         {
-            RET = PtrMetadata(*p); //~ ERROR: Undefined Behavior: using uninitialized data
+            RET = PtrMetadata(*p); //~ ERROR: /Undefined Behavior: .* but memory is uninitialized/
             Return()
         }
     }
diff --git a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_data.stderr b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_data.stderr
index 1c22876ba43..1e7f500edb2 100644
--- a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_data.stderr
+++ b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_data.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail/intrinsics/ptr_metadata_uninit_slice_data.rs:LL:CC
    |
 LL |             RET = PtrMetadata(*p);
@@ -14,6 +14,9 @@ note: inside `main`
 LL |         let _meta = deref_meta(p.as_ptr().cast());
    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_len.rs b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_len.rs
index a2ffdc92c4e..7053c0f6e18 100644
--- a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_len.rs
+++ b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_len.rs
@@ -1,4 +1,7 @@
 //@compile-flags: -Zmiri-disable-validation
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]+..0x[0-9a-z]+\]" -> "[0xX..0xY]"
+
 #![feature(core_intrinsics, custom_mir)]
 use std::intrinsics::mir::*;
 
@@ -9,7 +12,7 @@ use std::intrinsics::mir::*;
 pub unsafe fn deref_meta(p: *const *const [i32]) -> usize {
     mir! {
         {
-            RET = PtrMetadata(*p); //~ ERROR: Undefined Behavior: using uninitialized data
+            RET = PtrMetadata(*p); //~ ERROR: /Undefined Behavior: .* but memory is uninitialized/
             Return()
         }
     }
diff --git a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_len.stderr b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_len.stderr
index 00e63b1275f..80b4c8bec0d 100644
--- a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_len.stderr
+++ b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_slice_len.stderr
@@ -12,7 +12,7 @@ LL |         (*p.as_mut_ptr().cast::<[*const i32; 2]>())[0] = 4 as *const i32;
    = note: BACKTRACE:
    = note: inside `main` at tests/fail/intrinsics/ptr_metadata_uninit_slice_len.rs:LL:CC
 
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail/intrinsics/ptr_metadata_uninit_slice_len.rs:LL:CC
    |
 LL |             RET = PtrMetadata(*p);
@@ -28,6 +28,9 @@ note: inside `main`
 LL |         let _meta = deref_meta(p.as_ptr().cast());
    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error; 1 warning emitted
diff --git a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_thin.rs b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_thin.rs
index e5a51289a8a..3ba29847337 100644
--- a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_thin.rs
+++ b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_thin.rs
@@ -1,4 +1,7 @@
 //@compile-flags: -Zmiri-disable-validation
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
+
 #![feature(core_intrinsics, custom_mir)]
 use std::intrinsics::mir::*;
 
@@ -9,7 +12,7 @@ use std::intrinsics::mir::*;
 pub unsafe fn deref_meta(p: *const *const i32) -> () {
     mir! {
         {
-            RET = PtrMetadata(*p); //~ ERROR: Undefined Behavior: using uninitialized data
+            RET = PtrMetadata(*p); //~ ERROR: /Undefined Behavior: .*, but memory is uninitialized/
             Return()
         }
     }
diff --git a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_thin.stderr b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_thin.stderr
index 24066953d79..7a1f3d6ea84 100644
--- a/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_thin.stderr
+++ b/src/tools/miri/tests/fail/intrinsics/ptr_metadata_uninit_thin.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail/intrinsics/ptr_metadata_uninit_thin.rs:LL:CC
    |
 LL |             RET = PtrMetadata(*p);
@@ -14,6 +14,9 @@ note: inside `main`
 LL |         let _meta = deref_meta(p.as_ptr());
    |                     ^^^^^^^^^^^^^^^^^^^^^^
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/intrinsics/ptr_offset_out_of_bounds_neg2.rs b/src/tools/miri/tests/fail/intrinsics/ptr_offset_out_of_bounds_neg2.rs
new file mode 100644
index 00000000000..0085e2af367
--- /dev/null
+++ b/src/tools/miri/tests/fail/intrinsics/ptr_offset_out_of_bounds_neg2.rs
@@ -0,0 +1,6 @@
+fn main() {
+    let v = [0i8; 4];
+    let x = &v as *const i8;
+    let x = unsafe { x.wrapping_offset(-1).offset(-1) }; //~ERROR: before the beginning of the allocation
+    panic!("this should never print: {:?}", x);
+}
diff --git a/src/tools/miri/tests/fail/intrinsics/ptr_offset_out_of_bounds_neg2.stderr b/src/tools/miri/tests/fail/intrinsics/ptr_offset_out_of_bounds_neg2.stderr
new file mode 100644
index 00000000000..495aaf8d40e
--- /dev/null
+++ b/src/tools/miri/tests/fail/intrinsics/ptr_offset_out_of_bounds_neg2.stderr
@@ -0,0 +1,20 @@
+error: Undefined Behavior: in-bounds pointer arithmetic failed: attempting to offset pointer by -1 bytes, but got ALLOC-0x1 which points to before the beginning of the allocation
+  --> tests/fail/intrinsics/ptr_offset_out_of_bounds_neg2.rs:LL:CC
+   |
+LL |     let x = unsafe { x.wrapping_offset(-1).offset(-1) };
+   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Undefined Behavior occurred here
+   |
+   = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
+   = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
+help: ALLOC was allocated here:
+  --> tests/fail/intrinsics/ptr_offset_out_of_bounds_neg2.rs:LL:CC
+   |
+LL |     let v = [0i8; 4];
+   |         ^
+   = note: BACKTRACE (of the first span):
+   = note: inside `main` at tests/fail/intrinsics/ptr_offset_out_of_bounds_neg2.rs:LL:CC
+
+note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
+
+error: aborting due to 1 previous error
+
diff --git a/src/tools/miri/tests/fail/read_from_trivial_switch.rs b/src/tools/miri/tests/fail/read_from_trivial_switch.rs
index d34b1cd5820..2696c42aeae 100644
--- a/src/tools/miri/tests/fail/read_from_trivial_switch.rs
+++ b/src/tools/miri/tests/fail/read_from_trivial_switch.rs
@@ -4,11 +4,14 @@
 //
 // See <https://github.com/rust-lang/miri/issues/4237>.
 
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
+
 use std::mem::MaybeUninit;
 
 fn main() {
     let uninit: MaybeUninit<i32> = MaybeUninit::uninit();
     let bad_ref: &i32 = unsafe { uninit.assume_init_ref() };
     let &(0 | _) = bad_ref;
-    //~^ ERROR: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+    //~^ ERROR: /Undefined Behavior: .*, but memory is uninitialized .* requires initialized memory/
 }
diff --git a/src/tools/miri/tests/fail/read_from_trivial_switch.stderr b/src/tools/miri/tests/fail/read_from_trivial_switch.stderr
index 923d836ee0c..1dcc341b7e6 100644
--- a/src/tools/miri/tests/fail/read_from_trivial_switch.stderr
+++ b/src/tools/miri/tests/fail/read_from_trivial_switch.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail/read_from_trivial_switch.rs:LL:CC
    |
 LL |     let &(0 | _) = bad_ref;
@@ -9,6 +9,9 @@ LL |     let &(0 | _) = bad_ref;
    = note: BACKTRACE:
    = note: inside `main` at tests/fail/read_from_trivial_switch.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/uninit/padding-enum.rs b/src/tools/miri/tests/fail/uninit/padding-enum.rs
index e1a16bea23c..606fa21016f 100644
--- a/src/tools/miri/tests/fail/uninit/padding-enum.rs
+++ b/src/tools/miri/tests/fail/uninit/padding-enum.rs
@@ -1,3 +1,6 @@
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
+
 use std::mem;
 
 // We have three fields to avoid the ScalarPair optimization.
diff --git a/src/tools/miri/tests/fail/uninit/padding-enum.stderr b/src/tools/miri/tests/fail/uninit/padding-enum.stderr
index a9a5568f4e8..64229ac8817 100644
--- a/src/tools/miri/tests/fail/uninit/padding-enum.stderr
+++ b/src/tools/miri/tests/fail/uninit/padding-enum.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail/uninit/padding-enum.rs:LL:CC
    |
 LL |         let _val = *c.add(padding_offset);
@@ -9,6 +9,9 @@ LL |         let _val = *c.add(padding_offset);
    = note: BACKTRACE:
    = note: inside `main` at tests/fail/uninit/padding-enum.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/uninit/padding-pair.rs b/src/tools/miri/tests/fail/uninit/padding-pair.rs
index c8c00b3c65a..70ae48ff77d 100644
--- a/src/tools/miri/tests/fail/uninit/padding-pair.rs
+++ b/src/tools/miri/tests/fail/uninit/padding-pair.rs
@@ -1,3 +1,6 @@
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
+
 #![feature(core_intrinsics)]
 
 use std::mem::{self, MaybeUninit};
diff --git a/src/tools/miri/tests/fail/uninit/padding-pair.stderr b/src/tools/miri/tests/fail/uninit/padding-pair.stderr
index d281a351d41..2e7a577f204 100644
--- a/src/tools/miri/tests/fail/uninit/padding-pair.stderr
+++ b/src/tools/miri/tests/fail/uninit/padding-pair.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail/uninit/padding-pair.rs:LL:CC
    |
 LL |     let v = unsafe { *z.offset(first_undef) };
@@ -9,6 +9,9 @@ LL |     let v = unsafe { *z.offset(first_undef) };
    = note: BACKTRACE:
    = note: inside `main` at tests/fail/uninit/padding-pair.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/uninit/padding-struct.stderr b/src/tools/miri/tests/fail/uninit/padding-struct.stderr
index 3298f6a4510..05d754625d3 100644
--- a/src/tools/miri/tests/fail/uninit/padding-struct.stderr
+++ b/src/tools/miri/tests/fail/uninit/padding-struct.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0x1..0x2], but memory is uninitialized at [0x1..0x2], and this operation requires initialized memory
   --> tests/fail/uninit/padding-struct.rs:LL:CC
    |
 LL |         let _val = *c.add(1);
@@ -9,6 +9,11 @@ LL |         let _val = *c.add(1);
    = note: BACKTRACE:
    = note: inside `main` at tests/fail/uninit/padding-struct.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0x1..0x2], in this allocation:
+ALLOC (stack variable, size: 4, align: 2) {
+    00 __ 00 00                                     │ .░..
+}
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/uninit/padding-wide-ptr.rs b/src/tools/miri/tests/fail/uninit/padding-wide-ptr.rs
index 4e363dbf81e..549785e0223 100644
--- a/src/tools/miri/tests/fail/uninit/padding-wide-ptr.rs
+++ b/src/tools/miri/tests/fail/uninit/padding-wide-ptr.rs
@@ -1,3 +1,6 @@
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
+
 use std::mem;
 
 // If this is `None`, the metadata becomes padding.
diff --git a/src/tools/miri/tests/fail/uninit/padding-wide-ptr.stderr b/src/tools/miri/tests/fail/uninit/padding-wide-ptr.stderr
index d92d05ae631..ce11320ca1b 100644
--- a/src/tools/miri/tests/fail/uninit/padding-wide-ptr.stderr
+++ b/src/tools/miri/tests/fail/uninit/padding-wide-ptr.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail/uninit/padding-wide-ptr.rs:LL:CC
    |
 LL |         let _val = *c.add(mem::size_of::<*const u8>());
@@ -9,6 +9,9 @@ LL |         let _val = *c.add(mem::size_of::<*const u8>());
    = note: BACKTRACE:
    = note: inside `main` at tests/fail/uninit/padding-wide-ptr.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/uninit/transmute-pair-uninit.rs b/src/tools/miri/tests/fail/uninit/transmute-pair-uninit.rs
index 0ba5520a544..c1d284c7057 100644
--- a/src/tools/miri/tests/fail/uninit/transmute-pair-uninit.rs
+++ b/src/tools/miri/tests/fail/uninit/transmute-pair-uninit.rs
@@ -1,3 +1,6 @@
+//@ normalize-stderr-test: "(\n)ALLOC \(.*\) \{\n(.*\n)*\}(\n)" -> "${1}ALLOC DUMP${3}"
+//@ normalize-stderr-test: "\[0x[0-9a-z]..0x[0-9a-z]\]" -> "[0xX..0xY]"
+
 #![feature(core_intrinsics)]
 
 use std::mem::{self, MaybeUninit};
diff --git a/src/tools/miri/tests/fail/uninit/transmute-pair-uninit.stderr b/src/tools/miri/tests/fail/uninit/transmute-pair-uninit.stderr
index 0ae0ce5de9c..eb049dd41ec 100644
--- a/src/tools/miri/tests/fail/uninit/transmute-pair-uninit.stderr
+++ b/src/tools/miri/tests/fail/uninit/transmute-pair-uninit.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0xX..0xY], but memory is uninitialized at [0xX..0xY], and this operation requires initialized memory
   --> tests/fail/uninit/transmute-pair-uninit.rs:LL:CC
    |
 LL |     let v = unsafe { *z.offset(first_undef) };
@@ -9,6 +9,9 @@ LL |     let v = unsafe { *z.offset(first_undef) };
    = note: BACKTRACE:
    = note: inside `main` at tests/fail/uninit/transmute-pair-uninit.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0xX..0xY], in this allocation:
+ALLOC DUMP
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/uninit/uninit_byte_read.stderr b/src/tools/miri/tests/fail/uninit/uninit_byte_read.stderr
index d2a5a2d3831..5a5aa12987c 100644
--- a/src/tools/miri/tests/fail/uninit/uninit_byte_read.stderr
+++ b/src/tools/miri/tests/fail/uninit/uninit_byte_read.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0x5..0x6], but memory is uninitialized at [0x5..0x6], and this operation requires initialized memory
   --> tests/fail/uninit/uninit_byte_read.rs:LL:CC
    |
 LL |     let undef = unsafe { *v.as_ptr().add(5) };
@@ -9,6 +9,11 @@ LL |     let undef = unsafe { *v.as_ptr().add(5) };
    = note: BACKTRACE:
    = note: inside `main` at tests/fail/uninit/uninit_byte_read.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0x5..0x6], in this allocation:
+ALLOC (Rust heap, size: 10, align: 1) {
+    __ __ __ __ __ __ __ __ __ __                   │ ░░░░░░░░░░
+}
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/fail/validity/invalid_int_op.stderr b/src/tools/miri/tests/fail/validity/invalid_int_op.stderr
index 6e24cadfc20..0b1915621b2 100644
--- a/src/tools/miri/tests/fail/validity/invalid_int_op.stderr
+++ b/src/tools/miri/tests/fail/validity/invalid_int_op.stderr
@@ -1,4 +1,4 @@
-error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
+error: Undefined Behavior: reading memory at ALLOC[0x0..0x4], but memory is uninitialized at [0x0..0x4], and this operation requires initialized memory
   --> tests/fail/validity/invalid_int_op.rs:LL:CC
    |
 LL |     let i = unsafe { std::mem::MaybeUninit::<i32>::uninit().assume_init() };
@@ -9,6 +9,11 @@ LL |     let i = unsafe { std::mem::MaybeUninit::<i32>::uninit().assume_init() }
    = note: BACKTRACE:
    = note: inside `main` at tests/fail/validity/invalid_int_op.rs:LL:CC
 
+Uninitialized memory occurred at ALLOC[0x0..0x4], in this allocation:
+ALLOC (stack variable, size: 4, align: 4) {
+    __ __ __ __                                     │ ░░░░
+}
+
 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
 
 error: aborting due to 1 previous error
diff --git a/src/tools/miri/tests/native-lib/fail/tracing/partial_init.rs b/src/tools/miri/tests/native-lib/fail/tracing/partial_init.rs
new file mode 100644
index 00000000000..7ab160773ff
--- /dev/null
+++ b/src/tools/miri/tests/native-lib/fail/tracing/partial_init.rs
@@ -0,0 +1,25 @@
+//@only-target: x86_64-unknown-linux-gnu i686-unknown-linux-gnu
+//@compile-flags: -Zmiri-native-lib-enable-tracing
+
+extern "C" {
+    fn init_n(n: i32, ptr: *mut u8);
+}
+
+fn main() {
+    partial_init();
+}
+
+// Initialise the first 2 elements of the slice from native code, and check
+// that the 3rd is correctly deemed uninit.
+fn partial_init() {
+    let mut slice = std::mem::MaybeUninit::<[u8; 3]>::uninit();
+    let slice_ptr = slice.as_mut_ptr().cast::<u8>();
+    unsafe {
+        // Initialize the first two elements.
+        init_n(2, slice_ptr);
+        assert!(*slice_ptr == 0);
+        assert!(*slice_ptr.offset(1) == 0);
+        // Reading the third is UB!
+        let _val = *slice_ptr.offset(2); //~ ERROR: /Undefined Behavior: reading memory.*, but memory is uninitialized/
+    }
+}
diff --git a/src/tools/miri/tests/native-lib/fail/tracing/partial_init.stderr b/src/tools/miri/tests/native-lib/fail/tracing/partial_init.stderr
new file mode 100644
index 00000000000..74a599ede5c
--- /dev/null
+++ b/src/tools/miri/tests/native-lib/fail/tracing/partial_init.stderr
@@ -0,0 +1,44 @@
+warning: sharing memory with a native function called via FFI
+  --> tests/native-lib/fail/tracing/partial_init.rs:LL:CC
+   |
+LL |         init_n(2, slice_ptr);
+   |         ^^^^^^^^^^^^^^^^^^^^ sharing memory with a native function
+   |
+   = help: when memory is shared with a native function call, Miri can only track initialisation and provenance on a best-effort basis
+   = help: in particular, Miri assumes that the native call initializes all memory it has written to
+   = help: Miri also assumes that any part of this memory may be a pointer that is permitted to point to arbitrary exposed memory
+   = help: what this means is that Miri will easily miss Undefined Behavior related to incorrect usage of this shared memory, so you should not take a clean Miri run as a signal that your FFI code is UB-free
+   = help: tracing memory accesses in native code is not yet fully implemented, so there can be further imprecisions beyond what is documented here
+   = note: BACKTRACE:
+   = note: inside `partial_init` at tests/native-lib/fail/tracing/partial_init.rs:LL:CC
+note: inside `main`
+  --> tests/native-lib/fail/tracing/partial_init.rs:LL:CC
+   |
+LL |     partial_init();
+   |     ^^^^^^^^^^^^^^
+
+error: Undefined Behavior: reading memory at ALLOC[0x2..0x3], but memory is uninitialized at [0x2..0x3], and this operation requires initialized memory
+  --> tests/native-lib/fail/tracing/partial_init.rs:LL:CC
+   |
+LL |         let _val = *slice_ptr.offset(2);
+   |                    ^^^^^^^^^^^^^^^^^^^^ Undefined Behavior occurred here
+   |
+   = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
+   = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
+   = note: BACKTRACE:
+   = note: inside `partial_init` at tests/native-lib/fail/tracing/partial_init.rs:LL:CC
+note: inside `main`
+  --> tests/native-lib/fail/tracing/partial_init.rs:LL:CC
+   |
+LL |     partial_init();
+   |     ^^^^^^^^^^^^^^
+
+Uninitialized memory occurred at ALLOC[0x2..0x3], in this allocation:
+ALLOC (stack variable, size: 3, align: 1) {
+    ╾00[wildcard] (1 ptr byte)╼ ╾00[wildcard] (1 ptr byte)╼ __                                        │ ━━░
+}
+
+note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
+
+error: aborting due to 1 previous error; 1 warning emitted
+
diff --git a/src/tools/miri/tests/native-lib/fail/tracing/unexposed_reachable_alloc.rs b/src/tools/miri/tests/native-lib/fail/tracing/unexposed_reachable_alloc.rs
new file mode 100644
index 00000000000..b78c29d98db
--- /dev/null
+++ b/src/tools/miri/tests/native-lib/fail/tracing/unexposed_reachable_alloc.rs
@@ -0,0 +1,29 @@
+//@only-target: x86_64-unknown-linux-gnu i686-unknown-linux-gnu
+//@compile-flags: -Zmiri-permissive-provenance -Zmiri-native-lib-enable-tracing
+
+extern "C" {
+    fn do_one_deref(ptr: *const *const *const i32) -> usize;
+}
+
+fn main() {
+    unexposed_reachable_alloc();
+}
+
+// Expose 2 pointers by virtue of doing a native read and assert that the 3rd in
+// the chain remains properly unexposed.
+fn unexposed_reachable_alloc() {
+    let inner = 42;
+    let intermediate_a = &raw const inner;
+    let intermediate_b = &raw const intermediate_a;
+    let exposed = &raw const intermediate_b;
+    // Discard the return value; it's just there so the access in C doesn't get optimised away.
+    unsafe { do_one_deref(exposed) };
+    // Native read should have exposed the address of intermediate_b...
+    let valid: *const i32 = std::ptr::with_exposed_provenance(intermediate_b.addr());
+    // but not of intermediate_a.
+    let invalid: *const i32 = std::ptr::with_exposed_provenance(intermediate_a.addr());
+    unsafe {
+        let _ok = *valid;
+        let _not_ok = *invalid; //~ ERROR: Undefined Behavior: memory access failed: attempting to access
+    }
+}
diff --git a/src/tools/miri/tests/native-lib/fail/tracing/unexposed_reachable_alloc.stderr b/src/tools/miri/tests/native-lib/fail/tracing/unexposed_reachable_alloc.stderr
new file mode 100644
index 00000000000..2d34dac1b3f
--- /dev/null
+++ b/src/tools/miri/tests/native-lib/fail/tracing/unexposed_reachable_alloc.stderr
@@ -0,0 +1,39 @@
+warning: sharing memory with a native function called via FFI
+  --> tests/native-lib/fail/tracing/unexposed_reachable_alloc.rs:LL:CC
+   |
+LL |     unsafe { do_one_deref(exposed) };
+   |              ^^^^^^^^^^^^^^^^^^^^^ sharing memory with a native function
+   |
+   = help: when memory is shared with a native function call, Miri can only track initialisation and provenance on a best-effort basis
+   = help: in particular, Miri assumes that the native call initializes all memory it has written to
+   = help: Miri also assumes that any part of this memory may be a pointer that is permitted to point to arbitrary exposed memory
+   = help: what this means is that Miri will easily miss Undefined Behavior related to incorrect usage of this shared memory, so you should not take a clean Miri run as a signal that your FFI code is UB-free
+   = help: tracing memory accesses in native code is not yet fully implemented, so there can be further imprecisions beyond what is documented here
+   = note: BACKTRACE:
+   = note: inside `unexposed_reachable_alloc` at tests/native-lib/fail/tracing/unexposed_reachable_alloc.rs:LL:CC
+note: inside `main`
+  --> tests/native-lib/fail/tracing/unexposed_reachable_alloc.rs:LL:CC
+   |
+LL |     unexposed_reachable_alloc();
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: Undefined Behavior: memory access failed: attempting to access 4 bytes, but got $HEX[noalloc] which is a dangling pointer (it has no provenance)
+  --> tests/native-lib/fail/tracing/unexposed_reachable_alloc.rs:LL:CC
+   |
+LL |         let _not_ok = *invalid;
+   |                       ^^^^^^^^ Undefined Behavior occurred here
+   |
+   = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
+   = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
+   = note: BACKTRACE:
+   = note: inside `unexposed_reachable_alloc` at tests/native-lib/fail/tracing/unexposed_reachable_alloc.rs:LL:CC
+note: inside `main`
+  --> tests/native-lib/fail/tracing/unexposed_reachable_alloc.rs:LL:CC
+   |
+LL |     unexposed_reachable_alloc();
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
+
+error: aborting due to 1 previous error; 1 warning emitted
+
diff --git a/src/tools/miri/tests/native-lib/pass/ptr_read_access.stderr b/src/tools/miri/tests/native-lib/pass/ptr_read_access.notrace.stderr
index 04a3025baef..04a3025baef 100644
--- a/src/tools/miri/tests/native-lib/pass/ptr_read_access.stderr
+++ b/src/tools/miri/tests/native-lib/pass/ptr_read_access.notrace.stderr
diff --git a/src/tools/miri/tests/native-lib/pass/ptr_read_access.stdout b/src/tools/miri/tests/native-lib/pass/ptr_read_access.notrace.stdout
index 1a8799abfc9..1a8799abfc9 100644
--- a/src/tools/miri/tests/native-lib/pass/ptr_read_access.stdout
+++ b/src/tools/miri/tests/native-lib/pass/ptr_read_access.notrace.stdout
diff --git a/src/tools/miri/tests/native-lib/pass/ptr_read_access.rs b/src/tools/miri/tests/native-lib/pass/ptr_read_access.rs
index 4c852135367..4f3c37f00c1 100644
--- a/src/tools/miri/tests/native-lib/pass/ptr_read_access.rs
+++ b/src/tools/miri/tests/native-lib/pass/ptr_read_access.rs
@@ -1,3 +1,7 @@
+//@revisions: trace notrace
+//@[trace] only-target: x86_64-unknown-linux-gnu i686-unknown-linux-gnu
+//@[trace] compile-flags: -Zmiri-native-lib-enable-tracing
+
 fn main() {
     test_access_pointer();
     test_access_simple();
diff --git a/src/tools/miri/tests/native-lib/pass/ptr_read_access.trace.stderr b/src/tools/miri/tests/native-lib/pass/ptr_read_access.trace.stderr
new file mode 100644
index 00000000000..c2a4508b7fc
--- /dev/null
+++ b/src/tools/miri/tests/native-lib/pass/ptr_read_access.trace.stderr
@@ -0,0 +1,19 @@
+warning: sharing memory with a native function called via FFI
+  --> tests/native-lib/pass/ptr_read_access.rs:LL:CC
+   |
+LL |     unsafe { print_pointer(&x) };
+   |              ^^^^^^^^^^^^^^^^^ sharing memory with a native function
+   |
+   = help: when memory is shared with a native function call, Miri can only track initialisation and provenance on a best-effort basis
+   = help: in particular, Miri assumes that the native call initializes all memory it has written to
+   = help: Miri also assumes that any part of this memory may be a pointer that is permitted to point to arbitrary exposed memory
+   = help: what this means is that Miri will easily miss Undefined Behavior related to incorrect usage of this shared memory, so you should not take a clean Miri run as a signal that your FFI code is UB-free
+   = help: tracing memory accesses in native code is not yet fully implemented, so there can be further imprecisions beyond what is documented here
+   = note: BACKTRACE:
+   = note: inside `test_access_pointer` at tests/native-lib/pass/ptr_read_access.rs:LL:CC
+note: inside `main`
+  --> tests/native-lib/pass/ptr_read_access.rs:LL:CC
+   |
+LL |     test_access_pointer();
+   |     ^^^^^^^^^^^^^^^^^^^^^
+
diff --git a/src/tools/miri/tests/native-lib/pass/ptr_read_access.trace.stdout b/src/tools/miri/tests/native-lib/pass/ptr_read_access.trace.stdout
new file mode 100644
index 00000000000..1a8799abfc9
--- /dev/null
+++ b/src/tools/miri/tests/native-lib/pass/ptr_read_access.trace.stdout
@@ -0,0 +1 @@
+printing pointer dereference from C: 42
diff --git a/src/tools/miri/tests/native-lib/pass/ptr_write_access.stderr b/src/tools/miri/tests/native-lib/pass/ptr_write_access.notrace.stderr
index c893b0d9f65..c893b0d9f65 100644
--- a/src/tools/miri/tests/native-lib/pass/ptr_write_access.stderr
+++ b/src/tools/miri/tests/native-lib/pass/ptr_write_access.notrace.stderr
diff --git a/src/tools/miri/tests/native-lib/pass/ptr_write_access.rs b/src/tools/miri/tests/native-lib/pass/ptr_write_access.rs
index 86a9c97f4ce..57def78b0ab 100644
--- a/src/tools/miri/tests/native-lib/pass/ptr_write_access.rs
+++ b/src/tools/miri/tests/native-lib/pass/ptr_write_access.rs
@@ -1,3 +1,6 @@
+//@revisions: trace notrace
+//@[trace] only-target: x86_64-unknown-linux-gnu i686-unknown-linux-gnu
+//@[trace] compile-flags: -Zmiri-native-lib-enable-tracing
 //@compile-flags: -Zmiri-permissive-provenance
 
 #![feature(box_as_ptr)]
diff --git a/src/tools/miri/tests/native-lib/pass/ptr_write_access.trace.stderr b/src/tools/miri/tests/native-lib/pass/ptr_write_access.trace.stderr
new file mode 100644
index 00000000000..dbf021b15be
--- /dev/null
+++ b/src/tools/miri/tests/native-lib/pass/ptr_write_access.trace.stderr
@@ -0,0 +1,19 @@
+warning: sharing memory with a native function called via FFI
+  --> tests/native-lib/pass/ptr_write_access.rs:LL:CC
+   |
+LL |     unsafe { increment_int(&mut x) };
+   |              ^^^^^^^^^^^^^^^^^^^^^ sharing memory with a native function
+   |
+   = help: when memory is shared with a native function call, Miri can only track initialisation and provenance on a best-effort basis
+   = help: in particular, Miri assumes that the native call initializes all memory it has written to
+   = help: Miri also assumes that any part of this memory may be a pointer that is permitted to point to arbitrary exposed memory
+   = help: what this means is that Miri will easily miss Undefined Behavior related to incorrect usage of this shared memory, so you should not take a clean Miri run as a signal that your FFI code is UB-free
+   = help: tracing memory accesses in native code is not yet fully implemented, so there can be further imprecisions beyond what is documented here
+   = note: BACKTRACE:
+   = note: inside `test_increment_int` at tests/native-lib/pass/ptr_write_access.rs:LL:CC
+note: inside `main`
+  --> tests/native-lib/pass/ptr_write_access.rs:LL:CC
+   |
+LL |     test_increment_int();
+   |     ^^^^^^^^^^^^^^^^^^^^
+
diff --git a/src/tools/miri/tests/native-lib/ptr_read_access.c b/src/tools/miri/tests/native-lib/ptr_read_access.c
index b89126d3d7c..021eb6adca4 100644
--- a/src/tools/miri/tests/native-lib/ptr_read_access.c
+++ b/src/tools/miri/tests/native-lib/ptr_read_access.c
@@ -49,3 +49,9 @@ typedef struct Static {
 EXPORT int32_t access_static(const Static *s_ptr) {
   return s_ptr->recurse->recurse->value;
 }
+
+/* Test: unexposed_reachable_alloc */
+
+EXPORT uintptr_t do_one_deref(const int32_t ***ptr) {
+  return (uintptr_t)*ptr;
+}
diff --git a/src/tools/miri/tests/native-lib/ptr_write_access.c b/src/tools/miri/tests/native-lib/ptr_write_access.c
index fd8b005499c..5260d0b3651 100644
--- a/src/tools/miri/tests/native-lib/ptr_write_access.c
+++ b/src/tools/miri/tests/native-lib/ptr_write_access.c
@@ -107,3 +107,11 @@ EXPORT void set_shared_mem(int32_t** ptr) {
 EXPORT void init_ptr_stored_in_shared_mem(int32_t val) {
   **shared_place = val;
 }
+
+/* Test: partial_init */
+
+EXPORT void init_n(int32_t n, char* ptr) {
+  for (int i=0; i<n; i++) {
+    *(ptr+i) = 0;
+  }
+}
diff --git a/src/tools/miri/tests/panic/mir-validation.stderr b/src/tools/miri/tests/panic/mir-validation.stderr
index dc70d129da3..f801ac907e6 100644
--- a/src/tools/miri/tests/panic/mir-validation.stderr
+++ b/src/tools/miri/tests/panic/mir-validation.stderr
@@ -1,11 +1,15 @@
+error: internal compiler error: compiler/rustc_mir_transform/src/validate.rs:LL:CC: broken MIR in Item(DefId) (after phase change to runtime-optimized) at bb0[1]:
+                                place (*(_2.0: *mut i32)) has deref as a later projection (it is only permitted as the first projection)
+  --> tests/panic/mir-validation.rs:LL:CC
+   |
+LL |             *(tuple.0) = 1;
+   |             ^^^^^^^^^^^^^^
+
 
 thread 'rustc' panicked at compiler/rustc_mir_transform/src/validate.rs:LL:CC:
-broken MIR in Item(DefId) (after phase change to runtime-optimized) at bb0[1]:
-place (*(_2.0: *mut i32)) has deref as a later projection (it is only permitted as the first projection)
+Box<dyn Any>
 stack backtrace:
 
-error: the compiler unexpectedly panicked. this is a bug.
-
 
 
 
@@ -20,3 +24,5 @@ LL |     extern "rust-call" fn call_once(self, args: Args) -> Self::Output;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
 
+error: aborting due to 1 previous error
+
diff --git a/src/tools/miri/tests/pass-dep/libc/libc-time.rs b/src/tools/miri/tests/pass-dep/libc/libc-time.rs
index e8957846ad5..9e9fadfca9e 100644
--- a/src/tools/miri/tests/pass-dep/libc/libc-time.rs
+++ b/src/tools/miri/tests/pass-dep/libc/libc-time.rs
@@ -336,7 +336,7 @@ fn test_nanosleep() {
     let remainder = ptr::null_mut::<libc::timespec>();
     let is_error = unsafe { libc::nanosleep(&duration_zero, remainder) };
     assert_eq!(is_error, 0);
-    assert!(start_test_sleep.elapsed() < Duration::from_millis(10));
+    assert!(start_test_sleep.elapsed() < Duration::from_millis(100));
 
     let start_test_sleep = Instant::now();
     let duration_100_millis = libc::timespec { tv_sec: 0, tv_nsec: 1_000_000_000 / 10 };
@@ -390,7 +390,7 @@ mod test_clock_nanosleep {
             )
         };
         assert_eq!(error, 0);
-        assert!(start_test_sleep.elapsed() < Duration::from_millis(10));
+        assert!(start_test_sleep.elapsed() < Duration::from_millis(100));
 
         let start_test_sleep = Instant::now();
         let hunderd_millis_after_start = add_100_millis(timespec_now(libc::CLOCK_MONOTONIC));
@@ -417,7 +417,7 @@ mod test_clock_nanosleep {
             libc::clock_nanosleep(libc::CLOCK_MONOTONIC, NO_FLAGS, &duration_zero, remainder)
         };
         assert_eq!(error, 0);
-        assert!(start_test_sleep.elapsed() < Duration::from_millis(10));
+        assert!(start_test_sleep.elapsed() < Duration::from_millis(100));
 
         let start_test_sleep = Instant::now();
         let duration_100_millis = libc::timespec { tv_sec: 0, tv_nsec: 1_000_000_000 / 10 };
diff --git a/src/tools/miri/tests/pass/0weak_memory_consistency.rs b/src/tools/miri/tests/pass/0weak_memory_consistency.rs
index b33aefaf1d5..e4ed9675de8 100644
--- a/src/tools/miri/tests/pass/0weak_memory_consistency.rs
+++ b/src/tools/miri/tests/pass/0weak_memory_consistency.rs
@@ -41,7 +41,15 @@ fn static_atomic_bool(val: bool) -> &'static AtomicBool {
 }
 
 /// Spins until it acquires a pre-determined value.
-fn loads_value(loc: &AtomicI32, ord: Ordering, val: i32) -> i32 {
+fn spin_until_i32(loc: &AtomicI32, ord: Ordering, val: i32) -> i32 {
+    while loc.load(ord) != val {
+        std::hint::spin_loop();
+    }
+    val
+}
+
+/// Spins until it acquires a pre-determined boolean.
+fn spin_until_bool(loc: &AtomicBool, ord: Ordering, val: bool) -> bool {
     while loc.load(ord) != val {
         std::hint::spin_loop();
     }
@@ -65,7 +73,7 @@ fn test_corr() {
     }); //                                           |                    |
     #[rustfmt::skip] //                              |synchronizes-with   |happens-before
     let j3 = spawn(move || { //                      |                    |
-        loads_value(&y, Acquire, 1); // <------------+                    |
+        spin_until_i32(&y, Acquire, 1); // <---------+                    |
         x.load(Relaxed) // <----------------------------------------------+
         // The two reads on x are ordered by hb, so they cannot observe values
         // differently from the modification order. If the first read observed
@@ -90,12 +98,12 @@ fn test_wrc() {
     }); //                                           |                     |
     #[rustfmt::skip] //                              |synchronizes-with    |
     let j2 = spawn(move || { //                      |                     |
-        loads_value(&x, Acquire, 1); // <------------+                     |
+        spin_until_i32(&x, Acquire, 1); // <---------+                     |
         y.store(1, Release); // ---------------------+                     |happens-before
     }); //                                           |                     |
     #[rustfmt::skip] //                              |synchronizes-with    |
     let j3 = spawn(move || { //                      |                     |
-        loads_value(&y, Acquire, 1); // <------------+                     |
+        spin_until_i32(&y, Acquire, 1); // <---------+                     |
         x.load(Relaxed) // <-----------------------------------------------+
     });
 
@@ -121,7 +129,7 @@ fn test_message_passing() {
     #[rustfmt::skip] //                              |synchronizes-with  | happens-before
     let j2 = spawn(move || { //                      |                   |
         let x = x; // avoid field capturing          |                   |
-        loads_value(&y, Acquire, 1); // <------------+                   |
+        spin_until_i32(&y, Acquire, 1); // <---------+                   |
         unsafe { *x.0 } // <---------------------------------------------+
     });
 
@@ -216,12 +224,12 @@ fn test_sync_through_rmw_and_fences() {
     let go = static_atomic_bool(false);
 
     let t1 = spawn(move || {
-        while !go.load(Relaxed) {}
+        spin_until_bool(go, Relaxed, true);
         rdmw(y, x, z)
     });
 
     let t2 = spawn(move || {
-        while !go.load(Relaxed) {}
+        spin_until_bool(go, Relaxed, true);
         rdmw(z, x, y)
     });
 
diff --git a/src/tools/miri/tests/pass/0weak_memory_consistency_sc.rs b/src/tools/miri/tests/pass/0weak_memory_consistency_sc.rs
index 45cc5e6e722..937c2a8cf28 100644
--- a/src/tools/miri/tests/pass/0weak_memory_consistency_sc.rs
+++ b/src/tools/miri/tests/pass/0weak_memory_consistency_sc.rs
@@ -20,7 +20,15 @@ fn static_atomic_bool(val: bool) -> &'static AtomicBool {
 }
 
 /// Spins until it acquires a pre-determined value.
-fn loads_value(loc: &AtomicI32, ord: Ordering, val: i32) -> i32 {
+fn spin_until_i32(loc: &AtomicI32, ord: Ordering, val: i32) -> i32 {
+    while loc.load(ord) != val {
+        std::hint::spin_loop();
+    }
+    val
+}
+
+/// Spins until it acquires a pre-determined boolean.
+fn spin_until_bool(loc: &AtomicBool, ord: Ordering, val: bool) -> bool {
     while loc.load(ord) != val {
         std::hint::spin_loop();
     }
@@ -60,11 +68,11 @@ fn test_iriw_sc_rlx() {
     let a = spawn(move || x.store(true, Relaxed));
     let b = spawn(move || y.store(true, Relaxed));
     let c = spawn(move || {
-        while !x.load(SeqCst) {}
+        spin_until_bool(x, SeqCst, true);
         y.load(SeqCst)
     });
     let d = spawn(move || {
-        while !y.load(SeqCst) {}
+        spin_until_bool(y, SeqCst, true);
         x.load(SeqCst)
     });
 
@@ -136,7 +144,7 @@ fn test_cpp20_rwc_syncs() {
     });
 
     let j2 = spawn(move || {
-        loads_value(&x, Relaxed, 1);
+        spin_until_i32(&x, Relaxed, 1);
         fence(SeqCst);
         y.load(Relaxed)
     });
diff --git a/src/tools/miri/tests/pass/alloc-access-tracking.rs b/src/tools/miri/tests/pass/alloc-access-tracking.rs
index 0e88951dc43..9eba0ca171b 100644
--- a/src/tools/miri/tests/pass/alloc-access-tracking.rs
+++ b/src/tools/miri/tests/pass/alloc-access-tracking.rs
@@ -1,7 +1,7 @@
 #![no_std]
 #![no_main]
-//@compile-flags: -Zmiri-track-alloc-id=20 -Zmiri-track-alloc-accesses -Cpanic=abort
-//@normalize-stderr-test: "id 20" -> "id $$ALLOC"
+//@compile-flags: -Zmiri-track-alloc-id=19 -Zmiri-track-alloc-accesses -Cpanic=abort
+//@normalize-stderr-test: "id 19" -> "id $$ALLOC"
 //@only-target: linux # alloc IDs differ between OSes (due to extern static allocations)
 
 extern "Rust" {
diff --git a/src/tools/miri/tests/pass/fn_align.rs b/src/tools/miri/tests/pass/fn_align.rs
index 28f92995880..9752d033458 100644
--- a/src/tools/miri/tests/pass/fn_align.rs
+++ b/src/tools/miri/tests/pass/fn_align.rs
@@ -1,15 +1,19 @@
 //@compile-flags: -Zmin-function-alignment=8
+
+// FIXME(rust-lang/rust#82232, rust-lang/rust#143834): temporarily renamed to mitigate `#[align]`
+// nameres ambiguity
+#![feature(rustc_attrs)]
 #![feature(fn_align)]
 
 // When a function uses `align(N)`, the function address should be a multiple of `N`.
 
-#[align(256)]
+#[rustc_align(256)]
 fn foo() {}
 
-#[align(16)]
+#[rustc_align(16)]
 fn bar() {}
 
-#[align(4)]
+#[rustc_align(4)]
 fn baz() {}
 
 fn main() {
diff --git a/src/tools/miri/tests/pass/intrinsics/portable-simd.rs b/src/tools/miri/tests/pass/intrinsics/portable-simd.rs
index 726d4c01cc3..e2cd08733af 100644
--- a/src/tools/miri/tests/pass/intrinsics/portable-simd.rs
+++ b/src/tools/miri/tests/pass/intrinsics/portable-simd.rs
@@ -349,12 +349,15 @@ fn simd_mask() {
     // Non-power-of-2 multi-byte mask.
     #[repr(simd, packed)]
     #[allow(non_camel_case_types)]
-    #[derive(Copy, Clone, Debug, PartialEq)]
+    #[derive(Copy, Clone)]
     struct i32x10([i32; 10]);
     impl i32x10 {
         fn splat(x: i32) -> Self {
             Self([x; 10])
         }
+        fn into_array(self) -> [i32; 10] {
+            unsafe { std::mem::transmute(self) }
+        }
     }
     unsafe {
         let mask = i32x10([!0, !0, 0, !0, 0, 0, !0, 0, !0, 0]);
@@ -377,19 +380,22 @@ fn simd_mask() {
             i32x10::splat(!0), // yes
             i32x10::splat(0),  // no
         );
-        assert_eq!(selected1, mask);
-        assert_eq!(selected2, mask);
+        assert_eq!(selected1.into_array(), mask.into_array());
+        assert_eq!(selected2.into_array(), mask.into_array());
     }
 
     // Test for a mask where the next multiple of 8 is not a power of two.
     #[repr(simd, packed)]
     #[allow(non_camel_case_types)]
-    #[derive(Copy, Clone, Debug, PartialEq)]
+    #[derive(Copy, Clone)]
     struct i32x20([i32; 20]);
     impl i32x20 {
         fn splat(x: i32) -> Self {
             Self([x; 20])
         }
+        fn into_array(self) -> [i32; 20] {
+            unsafe { std::mem::transmute(self) }
+        }
     }
     unsafe {
         let mask = i32x20([!0, !0, 0, !0, 0, 0, !0, 0, !0, 0, 0, 0, 0, !0, !0, !0, !0, !0, !0, !0]);
@@ -419,8 +425,8 @@ fn simd_mask() {
             i32x20::splat(!0), // yes
             i32x20::splat(0),  // no
         );
-        assert_eq!(selected1, mask);
-        assert_eq!(selected2, mask);
+        assert_eq!(selected1.into_array(), mask.into_array());
+        assert_eq!(selected2.into_array(), mask.into_array());
     }
 }
 
@@ -708,12 +714,12 @@ fn simd_ops_non_pow2() {
     let x = SimdPacked([1u32; 3]);
     let y = SimdPacked([2u32; 3]);
     let z = unsafe { intrinsics::simd_add(x, y) };
-    assert_eq!({ z.0 }, [3u32; 3]);
+    assert_eq!(unsafe { *(&raw const z).cast::<[u32; 3]>() }, [3u32; 3]);
 
     let x = SimdPadded([1u32; 3]);
     let y = SimdPadded([2u32; 3]);
     let z = unsafe { intrinsics::simd_add(x, y) };
-    assert_eq!(z.0, [3u32; 3]);
+    assert_eq!(unsafe { *(&raw const z).cast::<[u32; 3]>() }, [3u32; 3]);
 }
 
 fn main() {
diff --git a/src/tools/miri/tests/pass/intrinsics/type-id.rs b/src/tools/miri/tests/pass/intrinsics/type-id.rs
new file mode 100644
index 00000000000..123fdbdc9ce
--- /dev/null
+++ b/src/tools/miri/tests/pass/intrinsics/type-id.rs
@@ -0,0 +1,19 @@
+use std::any::{Any, TypeId};
+
+fn main() {
+    let t1 = TypeId::of::<u64>();
+    let t2 = TypeId::of::<u64>();
+    assert_eq!(t1, t2);
+    let t3 = TypeId::of::<usize>();
+    assert_ne!(t1, t3);
+
+    let _ = format!("{t1:?}"); // test that we can debug-print
+
+    let b = Box::new(0u64) as Box<dyn Any>;
+    assert_eq!(*b.downcast_ref::<u64>().unwrap(), 0);
+    assert!(b.downcast_ref::<usize>().is_none());
+
+    // Get the first pointer chunk and try to make it a ZST ref.
+    // This used to trigger an error because TypeId allocs got misclassified as "LiveData".
+    let _raw_chunk = unsafe { (&raw const t1).cast::<&()>().read() };
+}
diff --git a/src/tools/miri/tests/pass/shims/ctor.rs b/src/tools/miri/tests/pass/shims/ctor.rs
new file mode 100644
index 00000000000..b997d2386b8
--- /dev/null
+++ b/src/tools/miri/tests/pass/shims/ctor.rs
@@ -0,0 +1,46 @@
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+static COUNT: AtomicUsize = AtomicUsize::new(0);
+
+unsafe extern "C" fn ctor() {
+    COUNT.fetch_add(1, Ordering::Relaxed);
+}
+
+#[rustfmt::skip]
+macro_rules! ctor {
+    ($ident:ident = $ctor:ident) => {
+        #[cfg_attr(
+            all(any(
+                target_os = "linux",
+                target_os = "android",
+                target_os = "dragonfly",
+                target_os = "freebsd",
+                target_os = "haiku",
+                target_os = "illumos",
+                target_os = "netbsd",
+                target_os = "openbsd",
+                target_os = "solaris",
+                target_os = "none",
+                target_family = "wasm",
+            )),
+            link_section = ".init_array"
+        )]
+        #[cfg_attr(windows, link_section = ".CRT$XCU")]
+        #[cfg_attr(
+            any(target_os = "macos", target_os = "ios"),
+            // We do not set the `mod_init_funcs` flag here since ctor/inventory also do not do
+            // that. See <https://github.com/rust-lang/miri/pull/4459#discussion_r2200115629>.
+            link_section = "__DATA,__mod_init_func"
+        )]
+        #[used]
+        static $ident: unsafe extern "C" fn() = $ctor;
+    };
+}
+
+ctor! { CTOR1 = ctor }
+ctor! { CTOR2 = ctor }
+ctor! { CTOR3 = ctor }
+
+fn main() {
+    assert_eq!(COUNT.load(Ordering::Relaxed), 3, "ctors did not run");
+}
diff --git a/src/tools/miri/tests/pass/shims/random.rs b/src/tools/miri/tests/pass/shims/random.rs
index ae75ebdcd3f..2a5c8993662 100644
--- a/src/tools/miri/tests/pass/shims/random.rs
+++ b/src/tools/miri/tests/pass/shims/random.rs
@@ -1,5 +1,5 @@
 #![feature(random)]
 
 fn main() {
-    let _x: i32 = std::random::random();
+    let _x: i32 = std::random::random(..);
 }
diff --git a/src/tools/miri/tests/pass/weak_memory/weak.rs b/src/tools/miri/tests/pass/weak_memory/weak.rs
index eeab4ebf129..199f83f0528 100644
--- a/src/tools/miri/tests/pass/weak_memory/weak.rs
+++ b/src/tools/miri/tests/pass/weak_memory/weak.rs
@@ -24,7 +24,7 @@ fn static_atomic(val: usize) -> &'static AtomicUsize {
 }
 
 // Spins until it reads the given value
-fn reads_value(loc: &AtomicUsize, val: usize) -> usize {
+fn spin_until(loc: &AtomicUsize, val: usize) -> usize {
     while loc.load(Relaxed) != val {
         std::hint::spin_loop();
     }
@@ -85,7 +85,7 @@ fn initialization_write(add_fence: bool) -> bool {
     });
 
     let j2 = spawn(move || {
-        reads_value(wait, 1);
+        spin_until(wait, 1);
         if add_fence {
             fence(AcqRel);
         }
@@ -119,12 +119,12 @@ fn faa_replaced_by_load() -> bool {
     let go = static_atomic(0);
 
     let t1 = spawn(move || {
-        while go.load(Relaxed) == 0 {}
+        spin_until(go, 1);
         rdmw(y, x, z)
     });
 
     let t2 = spawn(move || {
-        while go.load(Relaxed) == 0 {}
+        spin_until(go, 1);
         rdmw(z, x, y)
     });
 
diff --git a/src/tools/miri/tests/ui.rs b/src/tools/miri/tests/ui.rs
index 5239f8338ee..cb915b11b67 100644
--- a/src/tools/miri/tests/ui.rs
+++ b/src/tools/miri/tests/ui.rs
@@ -13,7 +13,8 @@ use ui_test::custom_flags::edition::Edition;
 use ui_test::dependencies::DependencyBuilder;
 use ui_test::per_test_config::TestConfig;
 use ui_test::spanned::Spanned;
-use ui_test::{CommandBuilder, Config, Format, Match, ignore_output_conflict, status_emitter};
+use ui_test::status_emitter::StatusEmitter;
+use ui_test::{CommandBuilder, Config, Match, ignore_output_conflict};
 
 #[derive(Copy, Clone, Debug)]
 enum Mode {
@@ -97,6 +98,8 @@ fn miri_config(
     let mut config = Config {
         target: Some(target.to_owned()),
         program,
+        // When changing this, remember to also adjust the logic in bootstrap, in Miri's test step,
+        // that deletes the `miri_ui` dir when it needs a rebuild.
         out_dir: PathBuf::from(env!("CARGO_TARGET_TMPDIR")).join("miri_ui"),
         threads: std::env::var("MIRI_TEST_THREADS")
             .ok()
@@ -139,7 +142,7 @@ fn miri_config(
                     envs: vec![("RUSTFLAGS".into(), None)],
                     ..CommandBuilder::cargo()
                 },
-                crate_manifest_path: Path::new("test_dependencies").join("Cargo.toml"),
+                crate_manifest_path: Path::new("tests/deps").join("Cargo.toml"),
                 build_std: None,
                 bless_lockfile: bless,
             },
@@ -214,10 +217,7 @@ fn run_tests(
         // This could be used to overwrite the `Config` on a per-test basis.
         |_, _| {},
         // No GHA output as that would also show in the main rustc repo.
-        match args.format {
-            Format::Terse => status_emitter::Text::quiet(),
-            Format::Pretty => status_emitter::Text::verbose(),
-        },
+        Box::<dyn StatusEmitter>::from(args.format),
     )
 }
 
@@ -333,7 +333,7 @@ fn main() -> Result<()> {
     ui(Mode::Panic, "tests/panic", &target, WithDependencies, tmpdir.path())?;
     ui(Mode::Fail, "tests/fail", &target, WithoutDependencies, tmpdir.path())?;
     ui(Mode::Fail, "tests/fail-dep", &target, WithDependencies, tmpdir.path())?;
-    if cfg!(unix) && target == host {
+    if cfg!(all(unix, feature = "native-lib")) && target == host {
         ui(Mode::Pass, "tests/native-lib/pass", &target, WithoutDependencies, tmpdir.path())?;
         ui(Mode::Fail, "tests/native-lib/fail", &target, WithoutDependencies, tmpdir.path())?;
     }
diff --git a/src/tools/miri/triagebot.toml b/src/tools/miri/triagebot.toml
index 60e80c3f673..a0ce9f80024 100644
--- a/src/tools/miri/triagebot.toml
+++ b/src/tools/miri/triagebot.toml
@@ -16,7 +16,13 @@ allow-unauthenticated = [
 # Enables assigning users to issues and PRs.
 [assign]
 warn_non_default_branch = true
-contributing_url = "https://github.com/rust-lang/miri/blob/master/CONTRIBUTING.md"
+contributing_url = "https://github.com/rust-lang/miri/blob/master/CONTRIBUTING.md#pr-review-process"
+[assign.custom_welcome_messages]
+welcome-message = "(unused)"
+welcome-message-no-reviewer = """
+Thank you for contributing to Miri!
+Please remember to not force-push to the PR branch except when you need to rebase due to a conflict or when the reviewer asks you for it.
+"""
 
 [no-merges]
 exclude_titles = ["Rustup"]
@@ -38,6 +44,12 @@ remove = []
 add = ["S-waiting-on-author"]
 unless = ["S-blocked", "S-waiting-on-team", "S-waiting-on-review"]
 
+[autolabel."S-waiting-on-review"]
+new_pr = true
+
+[autolabel."S-waiting-on-author"]
+new_draft = true
+
 # Automatically close and reopen PRs made by bots to run CI on them
 [bot-pull-requests]
 
diff --git a/src/tools/opt-dist/Cargo.toml b/src/tools/opt-dist/Cargo.toml
index dfa884bc3f7..2ed3fbac709 100644
--- a/src/tools/opt-dist/Cargo.toml
+++ b/src/tools/opt-dist/Cargo.toml
@@ -10,7 +10,7 @@ log = "0.4"
 anyhow = "1"
 humantime = "2"
 humansize = "2"
-sysinfo = { version = "0.35.0", default-features = false, features = ["disk"] }
+sysinfo = { version = "0.36.0", default-features = false, features = ["disk"] }
 fs_extra = "1"
 camino = "1"
 tar = "0.4"
diff --git a/src/tools/opt-dist/src/environment.rs b/src/tools/opt-dist/src/environment.rs
index 946e926a3c0..2cae0785f33 100644
--- a/src/tools/opt-dist/src/environment.rs
+++ b/src/tools/opt-dist/src/environment.rs
@@ -27,6 +27,9 @@ pub struct Environment {
     shared_llvm: bool,
     run_tests: bool,
     fast_try_build: bool,
+    build_llvm: bool,
+    #[builder(default)]
+    stage0_root: Option<Utf8PathBuf>,
 }
 
 impl Environment {
@@ -47,7 +50,7 @@ impl Environment {
     }
 
     pub fn build_artifacts(&self) -> Utf8PathBuf {
-        self.build_root().join("build").join(&self.host_tuple)
+        self.build_root().join(&self.host_tuple)
     }
 
     pub fn artifact_dir(&self) -> Utf8PathBuf {
@@ -55,17 +58,11 @@ impl Environment {
     }
 
     pub fn cargo_stage_0(&self) -> Utf8PathBuf {
-        self.build_artifacts()
-            .join("stage0")
-            .join("bin")
-            .join(format!("cargo{}", executable_extension()))
+        self.stage0().join("bin").join(format!("cargo{}", executable_extension()))
     }
 
     pub fn rustc_stage_0(&self) -> Utf8PathBuf {
-        self.build_artifacts()
-            .join("stage0")
-            .join("bin")
-            .join(format!("rustc{}", executable_extension()))
+        self.stage0().join("bin").join(format!("rustc{}", executable_extension()))
     }
 
     pub fn rustc_stage_2(&self) -> Utf8PathBuf {
@@ -111,6 +108,14 @@ impl Environment {
     pub fn is_fast_try_build(&self) -> bool {
         self.fast_try_build
     }
+
+    pub fn build_llvm(&self) -> bool {
+        self.build_llvm
+    }
+
+    pub fn stage0(&self) -> Utf8PathBuf {
+        self.stage0_root.clone().unwrap_or_else(|| self.build_artifacts().join("stage0"))
+    }
 }
 
 /// What is the extension of binary executables on this platform?
diff --git a/src/tools/opt-dist/src/exec.rs b/src/tools/opt-dist/src/exec.rs
index 0dc6e56b9d5..a8d4c93d160 100644
--- a/src/tools/opt-dist/src/exec.rs
+++ b/src/tools/opt-dist/src/exec.rs
@@ -99,7 +99,7 @@ pub struct Bootstrap {
 
 impl Bootstrap {
     pub fn build(env: &Environment) -> Self {
-        let metrics_path = env.build_root().join("build").join("metrics.json");
+        let metrics_path = env.build_root().join("metrics.json");
         let cmd = cmd(&[
             env.python_binary(),
             env.checkout_path().join("x.py").as_str(),
@@ -119,7 +119,7 @@ impl Bootstrap {
     }
 
     pub fn dist(env: &Environment, dist_args: &[String]) -> Self {
-        let metrics_path = env.build_root().join("build").join("metrics.json");
+        let metrics_path = env.build_root().join("metrics.json");
         let args = dist_args.iter().map(|arg| arg.as_str()).collect::<Vec<_>>();
         let cmd = cmd(&args).env("RUST_BACKTRACE", "full");
         let mut cmd = add_shared_x_flags(env, cmd);
@@ -139,8 +139,10 @@ impl Bootstrap {
         self
     }
 
-    pub fn llvm_pgo_optimize(mut self, profile: &LlvmPGOProfile) -> Self {
-        self.cmd = self.cmd.arg("--llvm-profile-use").arg(profile.0.as_str());
+    pub fn llvm_pgo_optimize(mut self, profile: Option<&LlvmPGOProfile>) -> Self {
+        if let Some(prof) = profile {
+            self.cmd = self.cmd.arg("--llvm-profile-use").arg(prof.0.as_str());
+        }
         self
     }
 
@@ -174,8 +176,10 @@ impl Bootstrap {
         self
     }
 
-    pub fn with_bolt_profile(mut self, profile: BoltProfile) -> Self {
-        self.cmd = self.cmd.arg("--reproducible-artifact").arg(profile.0.as_str());
+    pub fn with_bolt_profile(mut self, profile: Option<BoltProfile>) -> Self {
+        if let Some(prof) = profile {
+            self.cmd = self.cmd.arg("--reproducible-artifact").arg(prof.0.as_str());
+        }
         self
     }
 
diff --git a/src/tools/opt-dist/src/main.rs b/src/tools/opt-dist/src/main.rs
index 9c8a6637a3b..19706b4a4f0 100644
--- a/src/tools/opt-dist/src/main.rs
+++ b/src/tools/opt-dist/src/main.rs
@@ -62,7 +62,7 @@ enum EnvironmentCmd {
         python: String,
 
         /// Directory where artifacts (like PGO profiles or rustc-perf) of this workflow
-        /// will be stored.
+        /// will be stored. Relative to `checkout_dir`
         #[arg(long, default_value = "opt-artifacts")]
         artifact_dir: Utf8PathBuf,
 
@@ -98,6 +98,19 @@ enum EnvironmentCmd {
         /// Perform tests after final build if it's not a fast try build
         #[arg(long)]
         run_tests: bool,
+
+        /// Will be LLVM built during the run?
+        #[arg(long, default_value_t = true, action(clap::ArgAction::Set))]
+        build_llvm: bool,
+
+        /// Set build artifacts dir. Relative to `checkout_dir`, should point to the directory set
+        /// in bootstrap.toml via `build.build-dir` option
+        #[arg(long, default_value = "build")]
+        build_dir: Utf8PathBuf,
+
+        /// Path to custom stage0 root
+        #[arg(long)]
+        stage0_root: Option<Utf8PathBuf>,
     },
     /// Perform an optimized build on Linux CI, from inside Docker.
     LinuxCi {
@@ -133,14 +146,17 @@ fn create_environment(args: Args) -> anyhow::Result<(Environment, Vec<String>)>
             benchmark_cargo_config,
             shared,
             run_tests,
+            build_llvm,
+            build_dir,
+            stage0_root,
         } => {
             let env = EnvironmentBuilder::default()
                 .host_tuple(target_triple)
                 .python_binary(python)
                 .checkout_dir(checkout_dir.clone())
                 .host_llvm_dir(llvm_dir)
-                .artifact_dir(artifact_dir)
-                .build_dir(checkout_dir)
+                .artifact_dir(checkout_dir.join(artifact_dir))
+                .build_dir(checkout_dir.join(build_dir))
                 .prebuilt_rustc_perf(rustc_perf_checkout_dir)
                 .shared_llvm(llvm_shared)
                 .use_bolt(use_bolt)
@@ -148,6 +164,8 @@ fn create_environment(args: Args) -> anyhow::Result<(Environment, Vec<String>)>
                 .benchmark_cargo_config(benchmark_cargo_config)
                 .run_tests(run_tests)
                 .fast_try_build(is_fast_try_build)
+                .build_llvm(build_llvm)
+                .stage0_root(stage0_root)
                 .build()?;
 
             (env, shared.build_args)
@@ -165,13 +183,14 @@ fn create_environment(args: Args) -> anyhow::Result<(Environment, Vec<String>)>
                 .checkout_dir(checkout_dir.clone())
                 .host_llvm_dir(Utf8PathBuf::from("/rustroot"))
                 .artifact_dir(Utf8PathBuf::from("/tmp/tmp-multistage/opt-artifacts"))
-                .build_dir(checkout_dir.join("obj"))
+                .build_dir(checkout_dir.join("obj").join("build"))
                 .shared_llvm(true)
                 // FIXME: Enable bolt for aarch64 once it's fixed upstream. Broken as of December 2024.
                 .use_bolt(!is_aarch64)
                 .skipped_tests(vec![])
                 .run_tests(true)
                 .fast_try_build(is_fast_try_build)
+                .build_llvm(true)
                 .build()?;
 
             (env, shared.build_args)
@@ -187,12 +206,13 @@ fn create_environment(args: Args) -> anyhow::Result<(Environment, Vec<String>)>
                 .checkout_dir(checkout_dir.clone())
                 .host_llvm_dir(checkout_dir.join("citools").join("clang-rust"))
                 .artifact_dir(checkout_dir.join("opt-artifacts"))
-                .build_dir(checkout_dir)
+                .build_dir(checkout_dir.join("build"))
                 .shared_llvm(false)
                 .use_bolt(false)
                 .skipped_tests(vec![])
                 .run_tests(true)
                 .fast_try_build(is_fast_try_build)
+                .build_llvm(true)
                 .build()?;
 
             (env, shared.build_args)
@@ -255,30 +275,35 @@ fn execute_pipeline(
     // Stage 2: Gather LLVM PGO profiles
     // Here we build a PGO instrumented LLVM, reusing the previously PGO optimized rustc.
     // Then we use the instrumented LLVM to gather LLVM PGO profiles.
-    let llvm_pgo_profile = timer.section("Stage 2 (LLVM PGO)", |stage| {
-        // Remove the previous, uninstrumented build of LLVM.
-        clear_llvm_files(env)?;
+    let llvm_pgo_profile = if env.build_llvm() {
+        timer.section("Stage 2 (LLVM PGO)", |stage| {
+            // Remove the previous, uninstrumented build of LLVM.
+            clear_llvm_files(env)?;
 
-        let llvm_profile_dir_root = env.artifact_dir().join("llvm-pgo");
+            let llvm_profile_dir_root = env.artifact_dir().join("llvm-pgo");
 
-        stage.section("Build PGO instrumented LLVM", |section| {
-            Bootstrap::build(env)
-                .llvm_pgo_instrument(&llvm_profile_dir_root)
-                .avoid_rustc_rebuild()
-                .run(section)
-        })?;
+            stage.section("Build PGO instrumented LLVM", |section| {
+                Bootstrap::build(env)
+                    .llvm_pgo_instrument(&llvm_profile_dir_root)
+                    .avoid_rustc_rebuild()
+                    .run(section)
+            })?;
 
-        let profile = stage
-            .section("Gather profiles", |_| gather_llvm_profiles(env, &llvm_profile_dir_root))?;
+            let profile = stage.section("Gather profiles", |_| {
+                gather_llvm_profiles(env, &llvm_profile_dir_root)
+            })?;
 
-        print_free_disk_space()?;
+            print_free_disk_space()?;
 
-        // Proactively delete the instrumented artifacts, to avoid using them by accident in
-        // follow-up stages.
-        clear_llvm_files(env)?;
+            // Proactively delete the instrumented artifacts, to avoid using them by accident in
+            // follow-up stages.
+            clear_llvm_files(env)?;
 
-        Ok(profile)
-    })?;
+            Ok(Some(profile))
+        })?
+    } else {
+        None
+    };
 
     let bolt_profiles = if env.use_bolt() {
         // Stage 3: Build BOLT instrumented LLVM
@@ -286,37 +311,43 @@ fn execute_pipeline(
         // Note that we don't remove LLVM artifacts after this step, so that they are reused in the final dist build.
         // BOLT instrumentation is performed "on-the-fly" when the LLVM library is copied to the sysroot of rustc,
         // therefore the LLVM artifacts on disk are not "tainted" with BOLT instrumentation and they can be reused.
+        let libdir = env.build_artifacts().join("stage2").join("lib");
         timer.section("Stage 3 (BOLT)", |stage| {
-            stage.section("Build PGO optimized LLVM", |stage| {
-                Bootstrap::build(env)
-                    .with_llvm_bolt_ldflags()
-                    .llvm_pgo_optimize(&llvm_pgo_profile)
-                    .avoid_rustc_rebuild()
-                    .run(stage)
-            })?;
-
-            let libdir = env.build_artifacts().join("stage2").join("lib");
-            // The actual name will be something like libLLVM.so.18.1-rust-dev.
-            let llvm_lib = io::find_file_in_dir(&libdir, "libLLVM.so", "")?;
-
-            log::info!("Optimizing {llvm_lib} with BOLT");
-
-            // FIXME(kobzol): try gather profiles together, at once for LLVM and rustc
-            // Instrument the libraries and gather profiles
-            let llvm_profile = with_bolt_instrumented(&llvm_lib, |llvm_profile_dir| {
-                stage.section("Gather profiles", |_| {
-                    gather_bolt_profiles(env, "LLVM", llvm_benchmarks(env), llvm_profile_dir)
-                })
-            })?;
-            print_free_disk_space()?;
-
-            // Now optimize the library with BOLT. The `libLLVM-XXX.so` library is actually hard-linked
-            // from several places, and this specific path (`llvm_lib`) will *not* be packaged into
-            // the final dist build. However, when BOLT optimizes an artifact, it does so *in-place*,
-            // therefore it will actually optimize all the hard links, which means that the final
-            // packaged `libLLVM.so` file *will* be BOLT optimized.
-            bolt_optimize(&llvm_lib, &llvm_profile, env)
-                .context("Could not optimize LLVM with BOLT")?;
+            let llvm_profile = if env.build_llvm() {
+                stage.section("Build PGO optimized LLVM", |stage| {
+                    Bootstrap::build(env)
+                        .with_llvm_bolt_ldflags()
+                        .llvm_pgo_optimize(llvm_pgo_profile.as_ref())
+                        .avoid_rustc_rebuild()
+                        .run(stage)
+                })?;
+
+                // The actual name will be something like libLLVM.so.18.1-rust-dev.
+                let llvm_lib = io::find_file_in_dir(&libdir, "libLLVM.so", "")?;
+
+                log::info!("Optimizing {llvm_lib} with BOLT");
+
+                // FIXME(kobzol): try gather profiles together, at once for LLVM and rustc
+                // Instrument the libraries and gather profiles
+                let llvm_profile = with_bolt_instrumented(&llvm_lib, |llvm_profile_dir| {
+                    stage.section("Gather profiles", |_| {
+                        gather_bolt_profiles(env, "LLVM", llvm_benchmarks(env), llvm_profile_dir)
+                    })
+                })?;
+                print_free_disk_space()?;
+
+                // Now optimize the library with BOLT. The `libLLVM-XXX.so` library is actually hard-linked
+                // from several places, and this specific path (`llvm_lib`) will *not* be packaged into
+                // the final dist build. However, when BOLT optimizes an artifact, it does so *in-place*,
+                // therefore it will actually optimize all the hard links, which means that the final
+                // packaged `libLLVM.so` file *will* be BOLT optimized.
+                bolt_optimize(&llvm_lib, &llvm_profile, env)
+                    .context("Could not optimize LLVM with BOLT")?;
+
+                Some(llvm_profile)
+            } else {
+                None
+            };
 
             let rustc_lib = io::find_file_in_dir(&libdir, "librustc_driver", ".so")?;
 
@@ -334,15 +365,16 @@ fn execute_pipeline(
             bolt_optimize(&rustc_lib, &rustc_profile, env)
                 .context("Could not optimize rustc with BOLT")?;
 
-            // LLVM is not being cleared here, we want to use the BOLT-optimized LLVM
-            Ok(vec![llvm_profile, rustc_profile])
+            // LLVM is not being cleared here. Either we built it and we want to use the BOLT-optimized LLVM, or we
+            // didn't build it, so we don't want to remove it.
+            Ok(vec![llvm_profile, Some(rustc_profile)])
         })?
     } else {
         vec![]
     };
 
     let mut dist = Bootstrap::dist(env, &dist_args)
-        .llvm_pgo_optimize(&llvm_pgo_profile)
+        .llvm_pgo_optimize(llvm_pgo_profile.as_ref())
         .rustc_pgo_optimize(&rustc_pgo_profile)
         .avoid_rustc_rebuild();
 
diff --git a/src/tools/opt-dist/src/tests.rs b/src/tools/opt-dist/src/tests.rs
index 705a1750ae8..c9a21fc6fb2 100644
--- a/src/tools/opt-dist/src/tests.rs
+++ b/src/tools/opt-dist/src/tests.rs
@@ -13,7 +13,7 @@ pub fn run_tests(env: &Environment) -> anyhow::Result<()> {
     // and then use that extracted rustc as a stage0 compiler.
     // Then we run a subset of tests using that compiler, to have a basic smoke test which checks
     // whether the optimization pipeline hasn't broken something.
-    let build_dir = env.build_root().join("build");
+    let build_dir = env.build_root();
     let dist_dir = build_dir.join("dist");
     let unpacked_dist_dir = build_dir.join("unpacked-dist");
     std::fs::create_dir_all(&unpacked_dist_dir)?;
@@ -100,13 +100,16 @@ llvm-config = "{llvm_config}"
             env.host_tuple(),
             "--stage",
             "0",
-            "tests/assembly",
-            "tests/codegen",
+            "tests/assembly-llvm",
+            "tests/codegen-llvm",
             "tests/codegen-units",
             "tests/incremental",
             "tests/mir-opt",
             "tests/pretty",
+            // Make sure that we don't use too new GLIBC symbols on x64
             "tests/run-make/glibc-symbols-x86_64-unknown-linux-gnu",
+            // Make sure that we use LLD by default on x64
+            "tests/run-make/rust-lld-x86_64-unknown-linux-gnu-dist",
             "tests/ui",
             "tests/crashes",
         ];
diff --git a/src/tools/opt-dist/src/training.rs b/src/tools/opt-dist/src/training.rs
index 36a7d6a7cba..ae062d5c60c 100644
--- a/src/tools/opt-dist/src/training.rs
+++ b/src/tools/opt-dist/src/training.rs
@@ -163,7 +163,9 @@ pub fn gather_rustc_profiles(
     let merged_profile = env.artifact_dir().join("rustc-pgo.profdata");
     log::info!("Merging Rustc PGO profiles to {merged_profile}");
 
-    merge_llvm_profiles(env, &merged_profile, profile_root, LlvmProfdata::Target)?;
+    let llvm_profdata = if env.build_llvm() { LlvmProfdata::Target } else { LlvmProfdata::Host };
+
+    merge_llvm_profiles(env, &merged_profile, profile_root, llvm_profdata)?;
     log_profile_stats("Rustc", &merged_profile, profile_root)?;
 
     // We don't need the individual .profraw files now that they have been merged
diff --git a/src/tools/remote-test-client/src/main.rs b/src/tools/remote-test-client/src/main.rs
index bda08423487..b9741431b50 100644
--- a/src/tools/remote-test-client/src/main.rs
+++ b/src/tools/remote-test-client/src/main.rs
@@ -335,7 +335,9 @@ fn run(support_lib_count: usize, exe: String, all_args: Vec<String>) {
         std::process::exit(code);
     } else {
         println!("died due to signal {}", code);
-        std::process::exit(3);
+        // Behave like bash and other tools and exit with 128 + the signal
+        // number. That way we can avoid special case code in other places.
+        std::process::exit(128 + code);
     }
 }
 
diff --git a/src/tools/run-make-support/CHANGELOG.md b/src/tools/run-make-support/CHANGELOG.md
deleted file mode 100644
index c1b7b618a92..00000000000
--- a/src/tools/run-make-support/CHANGELOG.md
+++ /dev/null
@@ -1,83 +0,0 @@
-# Changelog
-
-All notable changes to the `run_make_support` library should be documented in this file.
-
-The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/) and the support
-library should adhere to [Semantic Versioning](https://semver.org/spec/v2.0.0.html) even if it's
-not intended for public consumption (it's moreso to help internally, to help test writers track
-changes to the support library).
-
-This support library will probably never reach 1.0. Please bump the minor version in `Cargo.toml` if
-you make any breaking changes or other significant changes, or bump the patch version for bug fixes.
-
-## [0.2.0] - 2024-06-11
-
-### Added
-
-- Added `fs_wrapper` module which provides panic-on-fail helpers for their respective `std::fs`
-  counterparts, the motivation is to:
-    - Reduce littering `.unwrap()` or `.expect()` everywhere for fs operations
-    - Help the test writer avoid forgetting to check fs results (even though enforced by
-      `-Dunused_must_use`)
-    - Provide better panic messages by default
-- Added `path()` helper which creates a `Path` relative to `cwd()` (but is less noisy).
-
-### Changed
-
-- Marked many functions with `#[must_use]`, and rmake.rs are now compiled with `-Dunused_must_use`.
-
-## [0.1.0] - 2024-06-09
-
-### Changed
-
-- Use *drop bombs* to enforce that commands are executed; a command invocation will panic if it is
-  constructed but never executed. Execution methods `Command::{run, run_fail}` will defuse the drop
-  bomb.
-- Added `Command` helpers that forward to `std::process::Command` counterparts.
-
-### Removed
-
-- The `env_var` method which was incorrectly named and is `env_clear` underneath and is a footgun
-  from `impl_common_helpers`. For example, removing `TMPDIR` on Unix and `TMP`/`TEMP` breaks
-  `std::env::temp_dir` and wrecks anything using that, such as rustc's codgen.
-- Removed `Deref`/`DerefMut` for `run_make_support::Command` -> `std::process::Command` because it
-  causes a method chain like `htmldocck().arg().run()` to fail, because `arg()` resolves to
-  `std::process::Command` which also returns a `&mut std::process::Command`, causing the `run()` to
-  be not found.
-
-## [0.0.0] - 2024-06-09
-
-Consider this version to contain all changes made to the support library before we started to track
-changes in this changelog.
-
-### Added
-
-- Custom command wrappers around `std::process::Command` (`run_make_support::Command`) and custom
-  wrapper around `std::process::Output` (`CompletedProcess`) to make it more convenient to work with
-  commands and their output, and help avoid forgetting to check for exit status.
-    - `Command`: `set_stdin`, `run`, `run_fail`.
-    - `CompletedProcess`: `std{err,out}_utf8`, `status`, `assert_std{err,out}_{equals, contains,
-      not_contains}`, `assert_exit_code`.
-- `impl_common_helpers` macro to avoid repeating adding common convenience methods, including:
-    - Environment manipulation methods: `env`, `env_remove`
-    - Command argument providers: `arg`, `args`
-    - Common invocation inspection (of the command invocation up until `inspect` is called):
-      `inspect`
-    - Execution methods: `run` (for commands expected to succeed execution, exit status `0`) and
-      `run_fail` (for commands expected to fail execution, exit status non-zero).
-- Command wrappers around: `rustc`, `clang`, `cc`, `rustc`, `rustdoc`, `llvm-readobj`.
-- Thin helpers to construct `python` and `htmldocck` commands.
-- `run` and `run_fail` (like `Command::{run, run_fail}`) for running binaries, which sets suitable
-  env vars (like `LD_LIB_PATH` or equivalent, `TARGET_RPATH_ENV`, `PATH` on Windows).
-- Pseudo command `diff` which has similar functionality as the cli util but not the same API.
-- Convenience panic-on-fail helpers `env_var`, `env_var_os`, `cwd` for their `std::env` conterparts.
-- Convenience panic-on-fail helpers for reading respective env vars: `target`, `source_root`.
-- Platform check helpers: `is_windows`, `is_msvc`, `cygpath_windows`, `uname`.
-- fs helpers: `copy_dir_all`.
-- `recursive_diff` helper.
-- Generic `assert_not_contains` helper.
-- Scoped run-with-teardown helper `run_in_tmpdir` which is designed to run commands in a temporary
-  directory that is cleared when closure returns.
-- Helpers for constructing the name of binaries and libraries: `rust_lib_name`, `static_lib_name`,
-  `bin_name`, `dynamic_lib_name`.
-- Re-export libraries: `gimli`, `object`, `regex`, `wasmparsmer`.
diff --git a/src/tools/run-make-support/Cargo.toml b/src/tools/run-make-support/Cargo.toml
index 3226f467ba4..a4e7534137d 100644
--- a/src/tools/run-make-support/Cargo.toml
+++ b/src/tools/run-make-support/Cargo.toml
@@ -1,18 +1,27 @@
 [package]
 name = "run_make_support"
-version = "0.2.0"
-edition = "2021"
+version = "0.0.0"
+edition = "2024"
 
 [dependencies]
+
+# These dependencies are either used to implement part of support library
+# functionality, or re-exported to test recipe programs via the support library,
+# or both.
+
+# tidy-alphabetical-start
 bstr = "1.12"
+gimli = "0.32"
+libc = "0.2"
 object = "0.37"
+regex = "1.11"
+serde_json = "1.0"
 similar = "2.7"
 wasmparser = { version = "0.219", default-features = false, features = ["std"] }
-regex = "1.11"
-gimli = "0.32"
+# tidy-alphabetical-end
+
+# Shared with bootstrap and compiletest
 build_helper = { path = "../../build_helper" }
-serde_json = "1.0"
-libc = "0.2"
 
 [lib]
 crate-type = ["lib", "dylib"]
diff --git a/src/tools/run-make-support/src/artifact_names.rs b/src/tools/run-make-support/src/artifact_names.rs
index b0d588d3550..a889b30e145 100644
--- a/src/tools/run-make-support/src/artifact_names.rs
+++ b/src/tools/run-make-support/src/artifact_names.rs
@@ -2,7 +2,7 @@
 //! libraries which are target-dependent.
 
 use crate::target;
-use crate::targets::is_msvc;
+use crate::targets::is_windows_msvc;
 
 /// Construct the static library name based on the target.
 #[track_caller]
@@ -10,7 +10,7 @@ use crate::targets::is_msvc;
 pub fn static_lib_name(name: &str) -> String {
     assert!(!name.contains(char::is_whitespace), "static library name cannot contain whitespace");
 
-    if is_msvc() { format!("{name}.lib") } else { format!("lib{name}.a") }
+    if is_windows_msvc() { format!("{name}.lib") } else { format!("lib{name}.a") }
 }
 
 /// Construct the dynamic library name based on the target.
@@ -45,7 +45,7 @@ pub fn dynamic_lib_extension() -> &'static str {
 #[track_caller]
 #[must_use]
 pub fn msvc_import_dynamic_lib_name(name: &str) -> String {
-    assert!(is_msvc(), "this function is exclusive to MSVC");
+    assert!(is_windows_msvc(), "this function is exclusive to MSVC");
     assert!(!name.contains(char::is_whitespace), "import library name cannot contain whitespace");
 
     format!("{name}.dll.lib")
diff --git a/src/tools/run-make-support/src/env.rs b/src/tools/run-make-support/src/env.rs
index 9acbb16d73e..cf1a6f7351a 100644
--- a/src/tools/run-make-support/src/env.rs
+++ b/src/tools/run-make-support/src/env.rs
@@ -18,11 +18,20 @@ pub fn env_var_os(name: &str) -> OsString {
     }
 }
 
-/// Check if `NO_DEBUG_ASSERTIONS` is set (usually this may be set in CI jobs).
+/// Check if staged `rustc`-under-test was built with debug assertions.
 #[track_caller]
 #[must_use]
-pub fn no_debug_assertions() -> bool {
-    std::env::var_os("NO_DEBUG_ASSERTIONS").is_some()
+pub fn rustc_debug_assertions_enabled() -> bool {
+    // Note: we assume this env var is set when the test recipe is being executed.
+    std::env::var_os("__RUSTC_DEBUG_ASSERTIONS_ENABLED").is_some()
+}
+
+/// Check if staged `std`-under-test was built with debug assertions.
+#[track_caller]
+#[must_use]
+pub fn std_debug_assertions_enabled() -> bool {
+    // Note: we assume this env var is set when the test recipe is being executed.
+    std::env::var_os("__STD_DEBUG_ASSERTIONS_ENABLED").is_some()
 }
 
 /// A wrapper around [`std::env::set_current_dir`] which includes the directory
diff --git a/src/tools/run-make-support/src/external_deps/c_build.rs b/src/tools/run-make-support/src/external_deps/c_build.rs
index 9dd30713f95..ecbf5ba8fe0 100644
--- a/src/tools/run-make-support/src/external_deps/c_build.rs
+++ b/src/tools/run-make-support/src/external_deps/c_build.rs
@@ -4,7 +4,7 @@ use crate::artifact_names::{dynamic_lib_name, static_lib_name};
 use crate::external_deps::c_cxx_compiler::{cc, cxx};
 use crate::external_deps::llvm::llvm_ar;
 use crate::path_helpers::path;
-use crate::targets::{is_darwin, is_msvc, is_windows};
+use crate::targets::{is_darwin, is_windows, is_windows_msvc};
 
 // FIXME(Oneirical): These native build functions should take a Path-based generic.
 
@@ -24,12 +24,12 @@ pub fn build_native_static_lib_optimized(lib_name: &str) -> PathBuf {
 
 #[track_caller]
 fn build_native_static_lib_internal(lib_name: &str, optimzed: bool) -> PathBuf {
-    let obj_file = if is_msvc() { format!("{lib_name}") } else { format!("{lib_name}.o") };
+    let obj_file = if is_windows_msvc() { format!("{lib_name}") } else { format!("{lib_name}.o") };
     let src = format!("{lib_name}.c");
     let lib_path = static_lib_name(lib_name);
 
     let mut cc = cc();
-    if !is_msvc() {
+    if !is_windows_msvc() {
         cc.arg("-v");
     }
     if optimzed {
@@ -37,7 +37,7 @@ fn build_native_static_lib_internal(lib_name: &str, optimzed: bool) -> PathBuf {
     }
     cc.arg("-c").out_exe(&obj_file).input(src).optimize().run();
 
-    let obj_file = if is_msvc() {
+    let obj_file = if is_windows_msvc() {
         PathBuf::from(format!("{lib_name}.obj"))
     } else {
         PathBuf::from(format!("{lib_name}.o"))
@@ -50,16 +50,17 @@ fn build_native_static_lib_internal(lib_name: &str, optimzed: bool) -> PathBuf {
 /// [`std::env::consts::DLL_PREFIX`] and [`std::env::consts::DLL_EXTENSION`].
 #[track_caller]
 pub fn build_native_dynamic_lib(lib_name: &str) -> PathBuf {
-    let obj_file = if is_msvc() { format!("{lib_name}") } else { format!("{lib_name}.o") };
+    let obj_file = if is_windows_msvc() { format!("{lib_name}") } else { format!("{lib_name}.o") };
     let src = format!("{lib_name}.c");
     let lib_path = dynamic_lib_name(lib_name);
-    if is_msvc() {
+    if is_windows_msvc() {
         cc().arg("-c").out_exe(&obj_file).input(src).run();
     } else {
         cc().arg("-v").arg("-c").out_exe(&obj_file).input(src).run();
     };
-    let obj_file = if is_msvc() { format!("{lib_name}.obj") } else { format!("{lib_name}.o") };
-    if is_msvc() {
+    let obj_file =
+        if is_windows_msvc() { format!("{lib_name}.obj") } else { format!("{lib_name}.o") };
+    if is_windows_msvc() {
         let out_arg = format!("-out:{lib_path}");
         cc().input(&obj_file).args(&["-link", "-dll", &out_arg]).run();
     } else if is_darwin() {
@@ -79,15 +80,15 @@ pub fn build_native_dynamic_lib(lib_name: &str) -> PathBuf {
 /// Built from a C++ file.
 #[track_caller]
 pub fn build_native_static_lib_cxx(lib_name: &str) -> PathBuf {
-    let obj_file = if is_msvc() { format!("{lib_name}") } else { format!("{lib_name}.o") };
+    let obj_file = if is_windows_msvc() { format!("{lib_name}") } else { format!("{lib_name}.o") };
     let src = format!("{lib_name}.cpp");
     let lib_path = static_lib_name(lib_name);
-    if is_msvc() {
+    if is_windows_msvc() {
         cxx().arg("-EHs").arg("-c").out_exe(&obj_file).input(src).run();
     } else {
         cxx().arg("-c").out_exe(&obj_file).input(src).run();
     };
-    let obj_file = if is_msvc() {
+    let obj_file = if is_windows_msvc() {
         PathBuf::from(format!("{lib_name}.obj"))
     } else {
         PathBuf::from(format!("{lib_name}.o"))
diff --git a/src/tools/run-make-support/src/external_deps/c_cxx_compiler/cc.rs b/src/tools/run-make-support/src/external_deps/c_cxx_compiler/cc.rs
index 0e6d6ea6075..31469e669e1 100644
--- a/src/tools/run-make-support/src/external_deps/c_cxx_compiler/cc.rs
+++ b/src/tools/run-make-support/src/external_deps/c_cxx_compiler/cc.rs
@@ -1,7 +1,7 @@
 use std::path::Path;
 
 use crate::command::Command;
-use crate::{env_var, is_msvc};
+use crate::{env_var, is_windows_msvc};
 
 /// Construct a new platform-specific C compiler invocation.
 ///
@@ -82,7 +82,7 @@ impl Cc {
     pub fn out_exe(&mut self, name: &str) -> &mut Self {
         let mut path = std::path::PathBuf::from(name);
 
-        if is_msvc() {
+        if is_windows_msvc() {
             path.set_extension("exe");
             let fe_path = path.clone();
             path.set_extension("");
@@ -108,7 +108,7 @@ impl Cc {
     /// Optimize the output.
     /// Equivalent to `-O3` for GNU-compatible linkers or `-O2` for MSVC linkers.
     pub fn optimize(&mut self) -> &mut Self {
-        if is_msvc() {
+        if is_windows_msvc() {
             self.cmd.arg("-O2");
         } else {
             self.cmd.arg("-O3");
diff --git a/src/tools/run-make-support/src/external_deps/c_cxx_compiler/extras.rs b/src/tools/run-make-support/src/external_deps/c_cxx_compiler/extras.rs
index c0317633873..ac7392641c0 100644
--- a/src/tools/run-make-support/src/external_deps/c_cxx_compiler/extras.rs
+++ b/src/tools/run-make-support/src/external_deps/c_cxx_compiler/extras.rs
@@ -1,9 +1,9 @@
-use crate::{is_msvc, is_win7, is_windows, uname};
+use crate::{is_win7, is_windows, is_windows_msvc, uname};
 
 /// `EXTRACFLAGS`
 pub fn extra_c_flags() -> Vec<&'static str> {
     if is_windows() {
-        if is_msvc() {
+        if is_windows_msvc() {
             let mut libs =
                 vec!["ws2_32.lib", "userenv.lib", "bcrypt.lib", "ntdll.lib", "synchronization.lib"];
             if is_win7() {
@@ -29,7 +29,7 @@ pub fn extra_c_flags() -> Vec<&'static str> {
 /// `EXTRACXXFLAGS`
 pub fn extra_cxx_flags() -> Vec<&'static str> {
     if is_windows() {
-        if is_msvc() { vec![] } else { vec!["-lstdc++"] }
+        if is_windows_msvc() { vec![] } else { vec!["-lstdc++"] }
     } else {
         match &uname()[..] {
             "Darwin" => vec!["-lc++"],
diff --git a/src/tools/run-make-support/src/external_deps/rustc.rs b/src/tools/run-make-support/src/external_deps/rustc.rs
index 72a1e062a38..08ba1388dc1 100644
--- a/src/tools/run-make-support/src/external_deps/rustc.rs
+++ b/src/tools/run-make-support/src/external_deps/rustc.rs
@@ -6,7 +6,7 @@ use crate::command::Command;
 use crate::env::env_var;
 use crate::path_helpers::cwd;
 use crate::util::set_host_compiler_dylib_path;
-use crate::{is_aix, is_darwin, is_msvc, is_windows, target, uname};
+use crate::{is_aix, is_darwin, is_windows, is_windows_msvc, target, uname};
 
 /// Construct a new `rustc` invocation. This will automatically set the library
 /// search path as `-L cwd()`. Use [`bare_rustc`] to avoid this.
@@ -52,13 +52,20 @@ impl Rustc {
     // `rustc` invocation constructor methods
 
     /// Construct a new `rustc` invocation. This will automatically set the library
-    /// search path as `-L cwd()` and also the compilation target.
+    /// search path as `-L cwd()`, configure the compilation target and enable
+    /// dynamic linkage by default on musl hosts.
     /// Use [`bare_rustc`] to avoid this.
     #[track_caller]
     pub fn new() -> Self {
         let mut cmd = setup_common();
         cmd.arg("-L").arg(cwd());
 
+        // FIXME: On musl hosts, we currently default to static linkage, while
+        // for running run-make tests, we rely on dynamic linkage by default
+        if std::env::var("IS_MUSL_HOST").is_ok_and(|i| i == "1") {
+            cmd.arg("-Ctarget-feature=-crt-static");
+        }
+
         // Automatically default to cross-compilation
         Self { cmd, target: Some(target()) }
     }
@@ -377,7 +384,7 @@ impl Rustc {
             // So we end up with the following hack: we link use static:-bundle to only
             // link the parts of libstdc++ that we actually use, which doesn't include
             // the dependency on the pthreads DLL.
-            if !is_msvc() {
+            if !is_windows_msvc() {
                 self.cmd.arg("-lstatic:-bundle=stdc++");
             };
         } else if is_darwin() {
diff --git a/src/tools/run-make-support/src/lib.rs b/src/tools/run-make-support/src/lib.rs
index 67d8c351a59..29cd6c4ad15 100644
--- a/src/tools/run-make-support/src/lib.rs
+++ b/src/tools/run-make-support/src/lib.rs
@@ -3,9 +3,6 @@
 //! notably is built via cargo: this means that if your test wants some non-trivial utility, such
 //! as `object` or `wasmparser`, they can be re-exported and be made available through this library.
 
-// We want to control use declaration ordering and spacing (and preserve use group comments), so
-// skip rustfmt on this file.
-#![cfg_attr(rustfmt, rustfmt::skip)]
 #![warn(unreachable_pub)]
 
 mod command;
@@ -22,8 +19,8 @@ pub mod path_helpers;
 pub mod run;
 pub mod scoped_run;
 pub mod string;
-pub mod targets;
 pub mod symbols;
+pub mod targets;
 
 // Internally we call our fs-related support module as `fs`, but re-export its content as `rfs`
 // to tests to avoid colliding with commonly used `use std::fs;`.
@@ -36,77 +33,56 @@ pub mod rfs {
 }
 
 // Re-exports of third-party library crates.
-// tidy-alphabetical-start
-pub use bstr;
-pub use gimli;
-pub use libc;
-pub use object;
-pub use regex;
-pub use serde_json;
-pub use similar;
-pub use wasmparser;
-// tidy-alphabetical-end
+pub use {bstr, gimli, libc, object, regex, serde_json, similar, wasmparser};
 
-// Re-exports of external dependencies.
-pub use external_deps::{
-    cargo, c_build, c_cxx_compiler, clang, htmldocck, llvm, python, rustc, rustdoc
+// Helpers for building names of output artifacts that are potentially target-specific.
+pub use crate::artifact_names::{
+    bin_name, dynamic_lib_extension, dynamic_lib_name, msvc_import_dynamic_lib_name, rust_lib_name,
+    static_lib_name,
 };
-
-// These rely on external dependencies.
-pub use c_cxx_compiler::{Cc, Gcc, cc, cxx, extra_c_flags, extra_cxx_flags, gcc};
-pub use c_build::{
+pub use crate::assertion_helpers::{
+    assert_contains, assert_contains_regex, assert_count_is, assert_dirs_are_equal, assert_equals,
+    assert_not_contains, assert_not_contains_regex,
+};
+// `diff` is implemented in terms of the [similar] library.
+//
+// [similar]: https://github.com/mitsuhiko/similar
+pub use crate::diff::{Diff, diff};
+// Panic-on-fail [`std::env::var`] and [`std::env::var_os`] wrappers.
+pub use crate::env::{env_var, env_var_os, set_current_dir};
+pub use crate::external_deps::c_build::{
     build_native_dynamic_lib, build_native_static_lib, build_native_static_lib_cxx,
     build_native_static_lib_optimized,
 };
-pub use cargo::cargo;
-pub use clang::{clang, Clang};
-pub use htmldocck::htmldocck;
-pub use llvm::{
-    llvm_ar, llvm_bcanalyzer, llvm_dis, llvm_dwarfdump, llvm_filecheck, llvm_nm, llvm_objcopy,
-    llvm_objdump, llvm_profdata, llvm_readobj, LlvmAr, LlvmBcanalyzer, LlvmDis, LlvmDwarfdump,
-    LlvmFilecheck, LlvmNm, LlvmObjcopy, LlvmObjdump, LlvmProfdata, LlvmReadobj,
-};
-pub use python::python_command;
-pub use rustc::{bare_rustc, rustc, rustc_path, Rustc};
-pub use rustdoc::{bare_rustdoc, rustdoc, Rustdoc};
-
-/// [`diff`][mod@diff] is implemented in terms of the [similar] library.
-///
-/// [similar]: https://github.com/mitsuhiko/similar
-pub use diff::{diff, Diff};
-
-/// Panic-on-fail [`std::env::var`] and [`std::env::var_os`] wrappers.
-pub use env::{env_var, env_var_os, set_current_dir};
-
-/// Convenience helpers for running binaries and other commands.
-pub use run::{cmd, run, run_fail, run_with_args};
-
-/// Helpers for checking target information.
-pub use targets::{
-    apple_os, is_aix, is_darwin, is_msvc, is_windows, is_windows_gnu, is_windows_msvc, is_win7, llvm_components_contain,
-    target, uname,
+// Re-exports of external dependencies.
+pub use crate::external_deps::c_cxx_compiler::{
+    Cc, Gcc, cc, cxx, extra_c_flags, extra_cxx_flags, gcc,
 };
-
-/// Helpers for building names of output artifacts that are potentially target-specific.
-pub use artifact_names::{
-    bin_name, dynamic_lib_extension, dynamic_lib_name, msvc_import_dynamic_lib_name, rust_lib_name,
-    static_lib_name,
+pub use crate::external_deps::cargo::cargo;
+pub use crate::external_deps::clang::{Clang, clang};
+pub use crate::external_deps::htmldocck::htmldocck;
+pub use crate::external_deps::llvm::{
+    self, LlvmAr, LlvmBcanalyzer, LlvmDis, LlvmDwarfdump, LlvmFilecheck, LlvmNm, LlvmObjcopy,
+    LlvmObjdump, LlvmProfdata, LlvmReadobj, llvm_ar, llvm_bcanalyzer, llvm_dis, llvm_dwarfdump,
+    llvm_filecheck, llvm_nm, llvm_objcopy, llvm_objdump, llvm_profdata, llvm_readobj,
 };
-
-/// Path-related helpers.
-pub use path_helpers::{
+pub use crate::external_deps::python::python_command;
+pub use crate::external_deps::rustc::{self, Rustc, bare_rustc, rustc, rustc_path};
+pub use crate::external_deps::rustdoc::{Rustdoc, bare_rustdoc, rustdoc};
+// Path-related helpers.
+pub use crate::path_helpers::{
     build_root, cwd, filename_contains, filename_not_in_denylist, has_extension, has_prefix,
     has_suffix, not_contains, path, shallow_find_directories, shallow_find_files, source_root,
 };
-
-/// Helpers for scoped test execution where certain properties are attempted to be maintained.
-pub use scoped_run::{run_in_tmpdir, test_while_readonly};
-
-pub use assertion_helpers::{
-    assert_contains, assert_contains_regex, assert_count_is, assert_dirs_are_equal, assert_equals,
-    assert_not_contains, assert_not_contains_regex,
-};
-
-pub use string::{
+// Convenience helpers for running binaries and other commands.
+pub use crate::run::{cmd, run, run_fail, run_with_args};
+// Helpers for scoped test execution where certain properties are attempted to be maintained.
+pub use crate::scoped_run::{run_in_tmpdir, test_while_readonly};
+pub use crate::string::{
     count_regex_matches_in_files_with_extension, invalid_utf8_contains, invalid_utf8_not_contains,
 };
+// Helpers for checking target information.
+pub use crate::targets::{
+    apple_os, is_aix, is_darwin, is_win7, is_windows, is_windows_gnu, is_windows_msvc,
+    llvm_components_contain, target, uname,
+};
diff --git a/src/tools/run-make-support/src/linker.rs b/src/tools/run-make-support/src/linker.rs
index 89093cf0113..b2893ad88fe 100644
--- a/src/tools/run-make-support/src/linker.rs
+++ b/src/tools/run-make-support/src/linker.rs
@@ -1,6 +1,6 @@
 use regex::Regex;
 
-use crate::{Rustc, is_msvc};
+use crate::{Rustc, is_windows_msvc};
 
 /// Asserts that `rustc` uses LLD for linking when executed.
 pub fn assert_rustc_uses_lld(rustc: &mut Rustc) {
@@ -22,7 +22,7 @@ pub fn assert_rustc_doesnt_use_lld(rustc: &mut Rustc) {
 
 fn get_stderr_with_linker_messages(rustc: &mut Rustc) -> String {
     // lld-link is used if msvc, otherwise a gnu-compatible lld is used.
-    let linker_version_flag = if is_msvc() { "--version" } else { "-Wl,-v" };
+    let linker_version_flag = if is_windows_msvc() { "--version" } else { "-Wl,-v" };
 
     let output = rustc.arg("-Wlinker-messages").link_arg(linker_version_flag).run();
     output.stderr_utf8()
diff --git a/src/tools/run-make-support/src/symbols.rs b/src/tools/run-make-support/src/symbols.rs
index e4d244e14a4..0e11360bd5a 100644
--- a/src/tools/run-make-support/src/symbols.rs
+++ b/src/tools/run-make-support/src/symbols.rs
@@ -1,6 +1,7 @@
+use std::collections::BTreeSet;
 use std::path::Path;
 
-use object::{self, Object, ObjectSymbol, SymbolIterator};
+use object::{self, Object, ObjectSymbol};
 
 /// Given an [`object::File`], find the exported dynamic symbol names via
 /// [`object::Object::exports`]. This does not distinguish between which section the symbols appear
@@ -14,47 +15,180 @@ pub fn exported_dynamic_symbol_names<'file>(file: &'file object::File<'file>) ->
         .collect()
 }
 
-/// Iterate through the symbols in an object file. See [`object::Object::symbols`].
+/// Check an object file's symbols for any matching **substrings**. That is, if an object file
+/// contains a symbol named `hello_world`, it will be matched against a provided `substrings` of
+/// `["hello", "bar"]`.
+///
+/// Returns `true` if **any** of the symbols found in the object file at `path` contain a
+/// **substring** listed in `substrings`.
 ///
 /// Panics if `path` is not a valid object file readable by the current user or if `path` cannot be
 /// parsed as a recognized object file.
+///
+/// # Platform-specific behavior
+///
+/// On Windows MSVC, the binary (e.g. `main.exe`) does not contain the symbols, but in the separate
+/// PDB file instead. Furthermore, you will need to use [`crate::llvm::llvm_pdbutil`] as `object`
+/// crate does not handle PDB files.
 #[track_caller]
-pub fn with_symbol_iter<P, F, R>(path: P, func: F) -> R
+pub fn object_contains_any_symbol_substring<P, S>(path: P, substrings: &[S]) -> bool
 where
     P: AsRef<Path>,
-    F: FnOnce(&mut SymbolIterator<'_, '_>) -> R,
+    S: AsRef<str>,
 {
     let path = path.as_ref();
     let blob = crate::fs::read(path);
-    let f = object::File::parse(&*blob)
+    let obj = object::File::parse(&*blob)
         .unwrap_or_else(|e| panic!("failed to parse `{}`: {e}", path.display()));
-    let mut iter = f.symbols();
-    func(&mut iter)
+    let substrings = substrings.iter().map(|s| s.as_ref()).collect::<Vec<_>>();
+    for sym in obj.symbols() {
+        for substring in &substrings {
+            if sym.name_bytes().unwrap().windows(substring.len()).any(|x| x == substring.as_bytes())
+            {
+                return true;
+            }
+        }
+    }
+    false
 }
 
-/// Check an object file's symbols for substrings.
+/// Check an object file's symbols for any exact matches against those provided in
+/// `candidate_symbols`.
 ///
-/// Returns `true` if any of the symbols found in the object file at `path` contain a substring
-/// listed in `substrings`.
+/// Returns `true` if **any** of the symbols found in the object file at `path` contain an **exact
+/// match** against those listed in `candidate_symbols`. Take care to account for (1) platform
+/// differences and (2) calling convention and symbol decorations differences.
 ///
 /// Panics if `path` is not a valid object file readable by the current user or if `path` cannot be
 /// parsed as a recognized object file.
+///
+/// # Platform-specific behavior
+///
+/// See [`object_contains_any_symbol_substring`].
 #[track_caller]
-pub fn any_symbol_contains(path: impl AsRef<Path>, substrings: &[&str]) -> bool {
-    with_symbol_iter(path, |syms| {
-        for sym in syms {
-            for substring in substrings {
-                if sym
-                    .name_bytes()
-                    .unwrap()
-                    .windows(substring.len())
-                    .any(|x| x == substring.as_bytes())
-                {
-                    eprintln!("{:?} contains {}", sym, substring);
-                    return true;
-                }
+pub fn object_contains_any_symbol<P, S>(path: P, candidate_symbols: &[S]) -> bool
+where
+    P: AsRef<Path>,
+    S: AsRef<str>,
+{
+    let path = path.as_ref();
+    let blob = crate::fs::read(path);
+    let obj = object::File::parse(&*blob)
+        .unwrap_or_else(|e| panic!("failed to parse `{}`: {e}", path.display()));
+    let candidate_symbols = candidate_symbols.iter().map(|s| s.as_ref()).collect::<Vec<_>>();
+    for sym in obj.symbols() {
+        for candidate_symbol in &candidate_symbols {
+            if sym.name_bytes().unwrap() == candidate_symbol.as_bytes() {
+                return true;
             }
         }
-        false
-    })
+    }
+    false
+}
+
+#[derive(Debug, PartialEq)]
+pub enum ContainsAllSymbolSubstringsOutcome<'a> {
+    Ok,
+    MissingSymbolSubstrings(BTreeSet<&'a str>),
+}
+
+/// Check an object file's symbols for presence of all of provided **substrings**. That is, if an
+/// object file contains symbols `["hello", "goodbye", "world"]`, it will be matched against a list
+/// of `substrings` of `["he", "go"]`. In this case, `he` is a substring of `hello`, and `go` is a
+/// substring of `goodbye`, so each of `substrings` was found.
+///
+/// Returns `true` if **all** `substrings` were present in the names of symbols for the given object
+/// file (as substrings of symbol names).
+///
+/// Panics if `path` is not a valid object file readable by the current user or if `path` cannot be
+/// parsed as a recognized object file.
+///
+/// # Platform-specific behavior
+///
+/// See [`object_contains_any_symbol_substring`].
+#[track_caller]
+pub fn object_contains_all_symbol_substring<'s, P, S>(
+    path: P,
+    substrings: &'s [S],
+) -> ContainsAllSymbolSubstringsOutcome<'s>
+where
+    P: AsRef<Path>,
+    S: AsRef<str>,
+{
+    let path = path.as_ref();
+    let blob = crate::fs::read(path);
+    let obj = object::File::parse(&*blob)
+        .unwrap_or_else(|e| panic!("failed to parse `{}`: {e}", path.display()));
+    let substrings = substrings.iter().map(|s| s.as_ref());
+    let mut unmatched_symbol_substrings = BTreeSet::from_iter(substrings);
+    unmatched_symbol_substrings.retain(|unmatched_symbol_substring| {
+        for sym in obj.symbols() {
+            if sym
+                .name_bytes()
+                .unwrap()
+                .windows(unmatched_symbol_substring.len())
+                .any(|x| x == unmatched_symbol_substring.as_bytes())
+            {
+                return false;
+            }
+        }
+
+        true
+    });
+
+    if unmatched_symbol_substrings.is_empty() {
+        ContainsAllSymbolSubstringsOutcome::Ok
+    } else {
+        ContainsAllSymbolSubstringsOutcome::MissingSymbolSubstrings(unmatched_symbol_substrings)
+    }
+}
+
+#[derive(Debug, PartialEq)]
+pub enum ContainsAllSymbolsOutcome<'a> {
+    Ok,
+    MissingSymbols(BTreeSet<&'a str>),
+}
+
+/// Check an object file contains all symbols provided in `candidate_symbols`.
+///
+/// Returns `true` if **all** of the symbols in `candidate_symbols` are found within the object file
+/// at `path` by **exact match**. Take care to account for (1) platform differences and (2) calling
+/// convention and symbol decorations differences.
+///
+/// Panics if `path` is not a valid object file readable by the current user or if `path` cannot be
+/// parsed as a recognized object file.
+///
+/// # Platform-specific behavior
+///
+/// See [`object_contains_any_symbol_substring`].
+#[track_caller]
+pub fn object_contains_all_symbols<P, S>(
+    path: P,
+    candidate_symbols: &[S],
+) -> ContainsAllSymbolsOutcome<'_>
+where
+    P: AsRef<Path>,
+    S: AsRef<str>,
+{
+    let path = path.as_ref();
+    let blob = crate::fs::read(path);
+    let obj = object::File::parse(&*blob)
+        .unwrap_or_else(|e| panic!("failed to parse `{}`: {e}", path.display()));
+    let candidate_symbols = candidate_symbols.iter().map(|s| s.as_ref());
+    let mut unmatched_symbols = BTreeSet::from_iter(candidate_symbols);
+    unmatched_symbols.retain(|unmatched_symbol| {
+        for sym in obj.symbols() {
+            if sym.name_bytes().unwrap() == unmatched_symbol.as_bytes() {
+                return false;
+            }
+        }
+
+        true
+    });
+
+    if unmatched_symbols.is_empty() {
+        ContainsAllSymbolsOutcome::Ok
+    } else {
+        ContainsAllSymbolsOutcome::MissingSymbols(unmatched_symbols)
+    }
 }
diff --git a/src/tools/run-make-support/src/targets.rs b/src/tools/run-make-support/src/targets.rs
index 1ab2e2ab2be..b20e12561fb 100644
--- a/src/tools/run-make-support/src/targets.rs
+++ b/src/tools/run-make-support/src/targets.rs
@@ -16,10 +16,10 @@ pub fn is_windows() -> bool {
     target().contains("windows")
 }
 
-/// Check if target uses msvc.
+/// Check if target is windows-msvc.
 #[must_use]
-pub fn is_msvc() -> bool {
-    target().contains("msvc")
+pub fn is_windows_msvc() -> bool {
+    target().ends_with("windows-msvc")
 }
 
 /// Check if target is windows-gnu.
@@ -28,12 +28,6 @@ pub fn is_windows_gnu() -> bool {
     target().ends_with("windows-gnu")
 }
 
-/// Check if target is windows-msvc.
-#[must_use]
-pub fn is_windows_msvc() -> bool {
-    target().ends_with("windows-msvc")
-}
-
 /// Check if target is win7.
 #[must_use]
 pub fn is_win7() -> bool {
diff --git a/src/tools/rust-analyzer/Cargo.lock b/src/tools/rust-analyzer/Cargo.lock
index 7432a82080d..c471234bbe3 100644
--- a/src/tools/rust-analyzer/Cargo.lock
+++ b/src/tools/rust-analyzer/Cargo.lock
@@ -154,6 +154,22 @@ dependencies = [
 ]
 
 [[package]]
+name = "cargo-util-schemas"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7dc1a6f7b5651af85774ae5a34b4e8be397d9cf4bc063b7e6dbd99a841837830"
+dependencies = [
+ "semver",
+ "serde",
+ "serde-untagged",
+ "serde-value",
+ "thiserror 2.0.12",
+ "toml",
+ "unicode-xid",
+ "url",
+]
+
+[[package]]
 name = "cargo_metadata"
 version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -161,7 +177,22 @@ checksum = "4f7835cfc6135093070e95eb2b53e5d9b5c403dc3a6be6040ee026270aa82502"
 dependencies = [
  "camino",
  "cargo-platform",
- "cargo-util-schemas",
+ "cargo-util-schemas 0.2.0",
+ "semver",
+ "serde",
+ "serde_json",
+ "thiserror 2.0.12",
+]
+
+[[package]]
+name = "cargo_metadata"
+version = "0.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5cfca2aaa699835ba88faf58a06342a314a950d2b9686165e038286c30316868"
+dependencies = [
+ "camino",
+ "cargo-platform",
+ "cargo-util-schemas 0.8.2",
  "semver",
  "serde",
  "serde_json",
@@ -1190,13 +1221,16 @@ checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
 name = "lsp-server"
 version = "0.7.8"
 dependencies = [
+ "anyhow",
  "crossbeam-channel",
  "ctrlc",
  "log",
  "lsp-types",
+ "rustc-hash 2.1.1",
  "serde",
  "serde_derive",
  "serde_json",
+ "toolchain",
 ]
 
 [[package]]
@@ -1234,7 +1268,7 @@ dependencies = [
  "expect-test",
  "intern",
  "parser",
- "ra-ap-rustc_lexer",
+ "ra-ap-rustc_lexer 0.122.0",
  "rustc-hash 2.1.1",
  "smallvec",
  "span",
@@ -1470,8 +1504,8 @@ dependencies = [
  "drop_bomb",
  "edition",
  "expect-test",
- "ra-ap-rustc_lexer",
- "rustc-literal-escaper 0.0.4",
+ "ra-ap-rustc_lexer 0.122.0",
+ "rustc-literal-escaper",
  "stdx",
  "tracing",
 ]
@@ -1580,7 +1614,7 @@ dependencies = [
  "object",
  "paths",
  "proc-macro-test",
- "ra-ap-rustc_lexer",
+ "ra-ap-rustc_lexer 0.122.0",
  "span",
  "syntax-bridge",
  "tt",
@@ -1599,7 +1633,7 @@ dependencies = [
 name = "proc-macro-test"
 version = "0.0.0"
 dependencies = [
- "cargo_metadata",
+ "cargo_metadata 0.20.0",
 ]
 
 [[package]]
@@ -1640,7 +1674,7 @@ version = "0.0.0"
 dependencies = [
  "anyhow",
  "base-db",
- "cargo_metadata",
+ "cargo_metadata 0.21.0",
  "cfg",
  "expect-test",
  "intern",
@@ -1722,9 +1756,9 @@ dependencies = [
 
 [[package]]
 name = "ra-ap-rustc_abi"
-version = "0.116.0"
+version = "0.122.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a967e3a9cd3e38b543f503978e0eccee461e3aea3f7b10e944959bff41dbe612"
+checksum = "fb01e1fec578003c85481c1cad4ff8cd8195b07c2dc85ae3f716108507ae15d5"
 dependencies = [
  "bitflags 2.9.1",
  "ra-ap-rustc_hashes",
@@ -1734,18 +1768,18 @@ dependencies = [
 
 [[package]]
 name = "ra-ap-rustc_hashes"
-version = "0.116.0"
+version = "0.122.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ea4c755ecbbffa5743c251344f484ebe571ec7bc5b36d80b2a8ae775d1a7a40"
+checksum = "e0ec056e72a472ffef8761ce96ece6c626eb07368c09d0105b6df30d27d07673"
 dependencies = [
  "rustc-stable-hash",
 ]
 
 [[package]]
 name = "ra-ap-rustc_index"
-version = "0.116.0"
+version = "0.122.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aca7ad7cf911538c619caa2162339fe98637e9e46f11bb0484ef96735df4d64a"
+checksum = "0fcdd1001db0295e59052e9f53aeda588bbe81e362534f4687d41bd44777b5a7"
 dependencies = [
  "ra-ap-rustc_index_macros",
  "smallvec",
@@ -1753,9 +1787,9 @@ dependencies = [
 
 [[package]]
 name = "ra-ap-rustc_index_macros"
-version = "0.116.0"
+version = "0.122.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8767ba551c9355bc3031be072cc4bb0381106e5e7cd275e72b7a8c76051c4070"
+checksum = "728d64dd98e25530b32e3f7c7c1e844e52722b269360daa1cdeba9dff9727a26"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1764,9 +1798,20 @@ dependencies = [
 
 [[package]]
 name = "ra-ap-rustc_lexer"
-version = "0.116.0"
+version = "0.121.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6101374afb267e6c27e4e2eb0b1352e9f3504c1a8f716f619cd39244e2ed92ab"
+checksum = "22944e31fb91e9b3e75bcbc91e37d958b8c0825a6160927f2856831d2ce83b36"
+dependencies = [
+ "memchr",
+ "unicode-properties",
+ "unicode-xid",
+]
+
+[[package]]
+name = "ra-ap-rustc_lexer"
+version = "0.122.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "415f0821f512608d825b3215489a6a6a2c18ed9f0045953d514e7ec23d4b90ab"
 dependencies = [
  "memchr",
  "unicode-properties",
@@ -1775,19 +1820,19 @@ dependencies = [
 
 [[package]]
 name = "ra-ap-rustc_parse_format"
-version = "0.116.0"
+version = "0.121.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ecd88a19f00da4f43e6727d5013444cbc399804b5046dfa2bbcd28ebed3970ce"
+checksum = "81057891bc2063ad9e353f29462fbc47a0f5072560af34428ae9313aaa5e9d97"
 dependencies = [
- "ra-ap-rustc_lexer",
- "rustc-literal-escaper 0.0.2",
+ "ra-ap-rustc_lexer 0.121.0",
+ "rustc-literal-escaper",
 ]
 
 [[package]]
 name = "ra-ap-rustc_pattern_analysis"
-version = "0.116.0"
+version = "0.122.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb332dd32d7850a799862533b1c021e6062558861a4ad57817bf522499fbb892"
+checksum = "4657fcfdfe06e2a02ec8180d4e7c95aecf4811ba50367e363d1a2300b7623284"
 dependencies = [
  "ra-ap-rustc_index",
  "rustc-hash 2.1.1",
@@ -1855,7 +1900,7 @@ version = "0.0.0"
 dependencies = [
  "anyhow",
  "base64",
- "cargo_metadata",
+ "cargo_metadata 0.21.0",
  "cfg",
  "crossbeam-channel",
  "dirs",
@@ -1934,12 +1979,6 @@ checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"
 
 [[package]]
 name = "rustc-literal-escaper"
-version = "0.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0041b6238913c41fe704213a4a9329e2f685a156d1781998128b4149c230ad04"
-
-[[package]]
-name = "rustc-literal-escaper"
 version = "0.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ab03008eb631b703dd16978282ae36c73282e7922fe101a4bd072a40ecea7b8b"
@@ -2231,7 +2270,7 @@ dependencies = [
  "rayon",
  "rowan",
  "rustc-hash 2.1.1",
- "rustc-literal-escaper 0.0.4",
+ "rustc-literal-escaper",
  "rustc_apfloat",
  "smol_str",
  "stdx",
@@ -2553,7 +2592,7 @@ version = "0.0.0"
 dependencies = [
  "arrayvec",
  "intern",
- "ra-ap-rustc_lexer",
+ "ra-ap-rustc_lexer 0.122.0",
  "stdx",
  "text-size",
 ]
diff --git a/src/tools/rust-analyzer/Cargo.toml b/src/tools/rust-analyzer/Cargo.toml
index d268ce5b0bb..700c116ec18 100644
--- a/src/tools/rust-analyzer/Cargo.toml
+++ b/src/tools/rust-analyzer/Cargo.toml
@@ -4,7 +4,7 @@ exclude = ["crates/proc-macro-srv/proc-macro-test/imp"]
 resolver = "2"
 
 [workspace.package]
-rust-version = "1.86"
+rust-version = "1.88"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 authors = ["rust-analyzer team"]
@@ -89,11 +89,11 @@ vfs-notify = { path = "./crates/vfs-notify", version = "0.0.0" }
 vfs = { path = "./crates/vfs", version = "0.0.0" }
 edition = { path = "./crates/edition", version = "0.0.0" }
 
-ra-ap-rustc_lexer = { version = "0.116", default-features = false }
-ra-ap-rustc_parse_format = { version = "0.116", default-features = false }
-ra-ap-rustc_index = { version = "0.116", default-features = false }
-ra-ap-rustc_abi = { version = "0.116", default-features = false }
-ra-ap-rustc_pattern_analysis = { version = "0.116", default-features = false }
+ra-ap-rustc_lexer = { version = "0.122", default-features = false }
+ra-ap-rustc_parse_format = { version = "0.121", default-features = false }
+ra-ap-rustc_index = { version = "0.122", default-features = false }
+ra-ap-rustc_abi = { version = "0.122", default-features = false }
+ra-ap-rustc_pattern_analysis = { version = "0.122", default-features = false }
 
 # local crates that aren't published to crates.io. These should not have versions.
 
@@ -106,7 +106,7 @@ lsp-server = { version = "0.7.8" }
 anyhow = "1.0.98"
 arrayvec = "0.7.6"
 bitflags = "2.9.1"
-cargo_metadata = "0.20.0"
+cargo_metadata = "0.21.0"
 camino = "1.1.10"
 chalk-solve = { version = "0.103.0", default-features = false }
 chalk-ir = "0.103.0"
@@ -138,7 +138,11 @@ rayon = "1.10.0"
 rowan = "=0.15.15"
 # Ideally we'd not enable the macros feature but unfortunately the `tracked` attribute does not work
 # on impls without it
-salsa = { version = "0.23.0", default-features = true, features = ["rayon","salsa_unstable", "macros"] }
+salsa = { version = "0.23.0", default-features = true, features = [
+  "rayon",
+  "salsa_unstable",
+  "macros",
+] }
 salsa-macros = "0.23.0"
 semver = "1.0.26"
 serde = { version = "1.0.219" }
diff --git a/src/tools/rust-analyzer/crates/cfg/src/cfg_expr.rs b/src/tools/rust-analyzer/crates/cfg/src/cfg_expr.rs
index 0ec082dfa7f..aed00aa9fc4 100644
--- a/src/tools/rust-analyzer/crates/cfg/src/cfg_expr.rs
+++ b/src/tools/rust-analyzer/crates/cfg/src/cfg_expr.rs
@@ -68,6 +68,11 @@ impl CfgExpr {
         next_cfg_expr(&mut tt.iter()).unwrap_or(CfgExpr::Invalid)
     }
 
+    #[cfg(feature = "tt")]
+    pub fn parse_from_iter<S: Copy>(tt: &mut tt::iter::TtIter<'_, S>) -> CfgExpr {
+        next_cfg_expr(tt).unwrap_or(CfgExpr::Invalid)
+    }
+
     /// Fold the cfg by querying all basic `Atom` and `KeyValue` predicates.
     pub fn fold(&self, query: &dyn Fn(&CfgAtom) -> bool) -> Option<bool> {
         match self {
@@ -96,7 +101,14 @@ fn next_cfg_expr<S: Copy>(it: &mut tt::iter::TtIter<'_, S>) -> Option<CfgExpr> {
     };
 
     let ret = match it.peek() {
-        Some(TtElement::Leaf(tt::Leaf::Punct(punct))) if punct.char == '=' => {
+        Some(TtElement::Leaf(tt::Leaf::Punct(punct)))
+            // Don't consume on e.g. `=>`.
+            if punct.char == '='
+                && (punct.spacing == tt::Spacing::Alone
+                    || it.remaining().flat_tokens().get(1).is_none_or(|peek2| {
+                        !matches!(peek2, tt::TokenTree::Leaf(tt::Leaf::Punct(_)))
+                    })) =>
+        {
             match it.remaining().flat_tokens().get(1) {
                 Some(tt::TokenTree::Leaf(tt::Leaf::Literal(literal))) => {
                     it.next();
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs
index 51612f341a1..d3dfc05eb29 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs
@@ -22,6 +22,7 @@ use rustc_hash::FxHashMap;
 use smallvec::SmallVec;
 use span::{Edition, SyntaxContext};
 use syntax::{AstPtr, SyntaxNodePtr, ast};
+use thin_vec::ThinVec;
 use triomphe::Arc;
 use tt::TextRange;
 
@@ -93,17 +94,17 @@ pub type TypeSource = InFile<TypePtr>;
 pub type LifetimePtr = AstPtr<ast::Lifetime>;
 pub type LifetimeSource = InFile<LifetimePtr>;
 
+// We split the store into types-only and expressions, because most stores (e.g. generics)
+// don't store any expressions and this saves memory. Same thing for the source map.
 #[derive(Debug, PartialEq, Eq)]
-pub struct ExpressionStore {
-    pub exprs: Arena<Expr>,
-    pub pats: Arena<Pat>,
-    pub bindings: Arena<Binding>,
-    pub labels: Arena<Label>,
-    pub types: Arena<TypeRef>,
-    pub lifetimes: Arena<LifetimeRef>,
+struct ExpressionOnlyStore {
+    exprs: Arena<Expr>,
+    pats: Arena<Pat>,
+    bindings: Arena<Binding>,
+    labels: Arena<Label>,
     /// Id of the closure/coroutine that owns the corresponding binding. If a binding is owned by the
     /// top level expression, it will not be listed in here.
-    pub binding_owners: FxHashMap<BindingId, ExprId>,
+    binding_owners: FxHashMap<BindingId, ExprId>,
     /// Block expressions in this store that may contain inner items.
     block_scopes: Box<[BlockId]>,
 
@@ -114,8 +115,15 @@ pub struct ExpressionStore {
     ident_hygiene: FxHashMap<ExprOrPatId, HygieneId>,
 }
 
+#[derive(Debug, PartialEq, Eq)]
+pub struct ExpressionStore {
+    expr_only: Option<Box<ExpressionOnlyStore>>,
+    pub types: Arena<TypeRef>,
+    pub lifetimes: Arena<LifetimeRef>,
+}
+
 #[derive(Debug, Eq, Default)]
-pub struct ExpressionStoreSourceMap {
+struct ExpressionOnlySourceMap {
     // AST expressions can create patterns in destructuring assignments. Therefore, `ExprSource` can also map
     // to `PatId`, and `PatId` can also map to `ExprSource` (the other way around is unaffected).
     expr_map: FxHashMap<ExprSource, ExprOrPatId>,
@@ -127,12 +135,6 @@ pub struct ExpressionStoreSourceMap {
     label_map: FxHashMap<LabelSource, LabelId>,
     label_map_back: ArenaMap<LabelId, LabelSource>,
 
-    types_map_back: ArenaMap<TypeRefId, TypeSource>,
-    types_map: FxHashMap<TypeSource, TypeRefId>,
-
-    lifetime_map_back: ArenaMap<LifetimeRefId, LifetimeSource>,
-    lifetime_map: FxHashMap<LifetimeSource, LifetimeRefId>,
-
     binding_definitions:
         ArenaMap<BindingId, SmallVec<[PatId; 2 * size_of::<usize>() / size_of::<PatId>()]>>,
 
@@ -143,14 +145,17 @@ pub struct ExpressionStoreSourceMap {
 
     template_map: Option<Box<FormatTemplate>>,
 
-    pub expansions: FxHashMap<InFile<MacroCallPtr>, MacroCallId>,
+    expansions: FxHashMap<InFile<MacroCallPtr>, MacroCallId>,
 
     /// Diagnostics accumulated during lowering. These contain `AstPtr`s and so are stored in
     /// the source map (since they're just as volatile).
-    pub diagnostics: Vec<ExpressionStoreDiagnostics>,
+    //
+    // We store diagnostics on the `ExpressionOnlySourceMap` because diagnostics are rare (except
+    // maybe for cfgs, and they are also not common in type places).
+    diagnostics: ThinVec<ExpressionStoreDiagnostics>,
 }
 
-impl PartialEq for ExpressionStoreSourceMap {
+impl PartialEq for ExpressionOnlySourceMap {
     fn eq(&self, other: &Self) -> bool {
         // we only need to compare one of the two mappings
         // as the other is a reverse mapping and thus will compare
@@ -162,10 +167,6 @@ impl PartialEq for ExpressionStoreSourceMap {
             pat_map_back,
             label_map: _,
             label_map_back,
-            types_map_back,
-            types_map: _,
-            lifetime_map_back,
-            lifetime_map: _,
             // If this changed, our pattern data must have changed
             binding_definitions: _,
             // If this changed, our expression data must have changed
@@ -179,14 +180,40 @@ impl PartialEq for ExpressionStoreSourceMap {
         *expr_map_back == other.expr_map_back
             && *pat_map_back == other.pat_map_back
             && *label_map_back == other.label_map_back
-            && *types_map_back == other.types_map_back
-            && *lifetime_map_back == other.lifetime_map_back
             && *template_map == other.template_map
             && *expansions == other.expansions
             && *diagnostics == other.diagnostics
     }
 }
 
+#[derive(Debug, Eq, Default)]
+pub struct ExpressionStoreSourceMap {
+    expr_only: Option<Box<ExpressionOnlySourceMap>>,
+
+    types_map_back: ArenaMap<TypeRefId, TypeSource>,
+    types_map: FxHashMap<TypeSource, TypeRefId>,
+
+    lifetime_map_back: ArenaMap<LifetimeRefId, LifetimeSource>,
+    #[expect(
+        unused,
+        reason = "this is here for completeness, and maybe we'll need it in the future"
+    )]
+    lifetime_map: FxHashMap<LifetimeSource, LifetimeRefId>,
+}
+
+impl PartialEq for ExpressionStoreSourceMap {
+    fn eq(&self, other: &Self) -> bool {
+        // we only need to compare one of the two mappings
+        // as the other is a reverse mapping and thus will compare
+        // the same as normal mapping
+        let Self { expr_only, types_map_back, types_map: _, lifetime_map_back, lifetime_map: _ } =
+            self;
+        *expr_only == other.expr_only
+            && *types_map_back == other.types_map_back
+            && *lifetime_map_back == other.lifetime_map_back
+    }
+}
+
 /// The body of an item (function, const etc.).
 #[derive(Debug, Eq, PartialEq, Default)]
 pub struct ExpressionStoreBuilder {
@@ -199,6 +226,42 @@ pub struct ExpressionStoreBuilder {
     pub types: Arena<TypeRef>,
     block_scopes: Vec<BlockId>,
     ident_hygiene: FxHashMap<ExprOrPatId, HygieneId>,
+
+    // AST expressions can create patterns in destructuring assignments. Therefore, `ExprSource` can also map
+    // to `PatId`, and `PatId` can also map to `ExprSource` (the other way around is unaffected).
+    expr_map: FxHashMap<ExprSource, ExprOrPatId>,
+    expr_map_back: ArenaMap<ExprId, ExprOrPatSource>,
+
+    pat_map: FxHashMap<PatSource, ExprOrPatId>,
+    pat_map_back: ArenaMap<PatId, ExprOrPatSource>,
+
+    label_map: FxHashMap<LabelSource, LabelId>,
+    label_map_back: ArenaMap<LabelId, LabelSource>,
+
+    types_map_back: ArenaMap<TypeRefId, TypeSource>,
+    types_map: FxHashMap<TypeSource, TypeRefId>,
+
+    lifetime_map_back: ArenaMap<LifetimeRefId, LifetimeSource>,
+    lifetime_map: FxHashMap<LifetimeSource, LifetimeRefId>,
+
+    binding_definitions:
+        ArenaMap<BindingId, SmallVec<[PatId; 2 * size_of::<usize>() / size_of::<PatId>()]>>,
+
+    /// We don't create explicit nodes for record fields (`S { record_field: 92 }`).
+    /// Instead, we use id of expression (`92`) to identify the field.
+    field_map_back: FxHashMap<ExprId, FieldSource>,
+    pat_field_map_back: FxHashMap<PatId, PatFieldSource>,
+
+    template_map: Option<Box<FormatTemplate>>,
+
+    expansions: FxHashMap<InFile<MacroCallPtr>, MacroCallId>,
+
+    /// Diagnostics accumulated during lowering. These contain `AstPtr`s and so are stored in
+    /// the source map (since they're just as volatile).
+    //
+    // We store diagnostics on the `ExpressionOnlySourceMap` because diagnostics are rare (except
+    // maybe for cfgs, and they are also not common in type places).
+    pub(crate) diagnostics: Vec<ExpressionStoreDiagnostics>,
 }
 
 #[derive(Default, Debug, Eq, PartialEq)]
@@ -226,7 +289,7 @@ pub enum ExpressionStoreDiagnostics {
 }
 
 impl ExpressionStoreBuilder {
-    pub fn finish(self) -> ExpressionStore {
+    pub fn finish(self) -> (ExpressionStore, ExpressionStoreSourceMap) {
         let Self {
             block_scopes,
             mut exprs,
@@ -237,6 +300,23 @@ impl ExpressionStoreBuilder {
             mut ident_hygiene,
             mut types,
             mut lifetimes,
+
+            mut expr_map,
+            mut expr_map_back,
+            mut pat_map,
+            mut pat_map_back,
+            mut label_map,
+            mut label_map_back,
+            mut types_map_back,
+            mut types_map,
+            mut lifetime_map_back,
+            mut lifetime_map,
+            mut binding_definitions,
+            mut field_map_back,
+            mut pat_field_map_back,
+            mut template_map,
+            mut expansions,
+            diagnostics,
         } = self;
         exprs.shrink_to_fit();
         labels.shrink_to_fit();
@@ -247,24 +327,90 @@ impl ExpressionStoreBuilder {
         types.shrink_to_fit();
         lifetimes.shrink_to_fit();
 
-        ExpressionStore {
-            exprs,
-            pats,
-            bindings,
-            labels,
-            binding_owners,
-            types,
-            lifetimes,
-            block_scopes: block_scopes.into_boxed_slice(),
-            ident_hygiene,
+        expr_map.shrink_to_fit();
+        expr_map_back.shrink_to_fit();
+        pat_map.shrink_to_fit();
+        pat_map_back.shrink_to_fit();
+        label_map.shrink_to_fit();
+        label_map_back.shrink_to_fit();
+        types_map_back.shrink_to_fit();
+        types_map.shrink_to_fit();
+        lifetime_map_back.shrink_to_fit();
+        lifetime_map.shrink_to_fit();
+        binding_definitions.shrink_to_fit();
+        field_map_back.shrink_to_fit();
+        pat_field_map_back.shrink_to_fit();
+        if let Some(template_map) = &mut template_map {
+            let FormatTemplate {
+                format_args_to_captures,
+                asm_to_captures,
+                implicit_capture_to_source,
+            } = &mut **template_map;
+            format_args_to_captures.shrink_to_fit();
+            asm_to_captures.shrink_to_fit();
+            implicit_capture_to_source.shrink_to_fit();
         }
+        expansions.shrink_to_fit();
+
+        let has_exprs =
+            !exprs.is_empty() || !labels.is_empty() || !pats.is_empty() || !bindings.is_empty();
+
+        let store = {
+            let expr_only = if has_exprs {
+                Some(Box::new(ExpressionOnlyStore {
+                    exprs,
+                    pats,
+                    bindings,
+                    labels,
+                    binding_owners,
+                    block_scopes: block_scopes.into_boxed_slice(),
+                    ident_hygiene,
+                }))
+            } else {
+                None
+            };
+            ExpressionStore { expr_only, types, lifetimes }
+        };
+
+        let source_map = {
+            let expr_only = if has_exprs || !expansions.is_empty() || !diagnostics.is_empty() {
+                Some(Box::new(ExpressionOnlySourceMap {
+                    expr_map,
+                    expr_map_back,
+                    pat_map,
+                    pat_map_back,
+                    label_map,
+                    label_map_back,
+                    binding_definitions,
+                    field_map_back,
+                    pat_field_map_back,
+                    template_map,
+                    expansions,
+                    diagnostics: ThinVec::from_iter(diagnostics),
+                }))
+            } else {
+                None
+            };
+            ExpressionStoreSourceMap {
+                expr_only,
+                types_map_back,
+                types_map,
+                lifetime_map_back,
+                lifetime_map,
+            }
+        };
+
+        (store, source_map)
     }
 }
 
 impl ExpressionStore {
-    pub fn empty_singleton() -> Arc<Self> {
-        static EMPTY: LazyLock<Arc<ExpressionStore>> =
-            LazyLock::new(|| Arc::new(ExpressionStoreBuilder::default().finish()));
+    pub fn empty_singleton() -> (Arc<ExpressionStore>, Arc<ExpressionStoreSourceMap>) {
+        static EMPTY: LazyLock<(Arc<ExpressionStore>, Arc<ExpressionStoreSourceMap>)> =
+            LazyLock::new(|| {
+                let (store, source_map) = ExpressionStoreBuilder::default().finish();
+                (Arc::new(store), Arc::new(source_map))
+            });
         EMPTY.clone()
     }
 
@@ -273,7 +419,12 @@ impl ExpressionStore {
         &'a self,
         db: &'a dyn DefDatabase,
     ) -> impl Iterator<Item = (BlockId, &'a DefMap)> + 'a {
-        self.block_scopes.iter().map(move |&block| (block, block_def_map(db, block)))
+        self.expr_only
+            .as_ref()
+            .map(|it| &*it.block_scopes)
+            .unwrap_or_default()
+            .iter()
+            .map(move |&block| (block, block_def_map(db, block)))
     }
 
     pub fn walk_bindings_in_pat(&self, pat_id: PatId, mut f: impl FnMut(BindingId)) {
@@ -320,7 +471,8 @@ impl ExpressionStore {
     }
 
     pub fn is_binding_upvar(&self, binding: BindingId, relative_to: ExprId) -> bool {
-        match self.binding_owners.get(&binding) {
+        let Some(expr_only) = &self.expr_only else { return false };
+        match expr_only.binding_owners.get(&binding) {
             Some(it) => {
                 // We assign expression ids in a way that outer closures will receive
                 // a lower id
@@ -330,6 +482,11 @@ impl ExpressionStore {
         }
     }
 
+    #[inline]
+    pub fn binding_owner(&self, id: BindingId) -> Option<ExprId> {
+        self.expr_only.as_ref()?.binding_owners.get(&id).copied()
+    }
+
     /// Walks the immediate children expressions and calls `f` for each child expression.
     ///
     /// Note that this does not walk const blocks.
@@ -601,16 +758,22 @@ impl ExpressionStore {
         });
     }
 
+    #[inline]
+    #[track_caller]
+    fn assert_expr_only(&self) -> &ExpressionOnlyStore {
+        self.expr_only.as_ref().expect("should have `ExpressionStore::expr_only`")
+    }
+
     fn binding_hygiene(&self, binding: BindingId) -> HygieneId {
-        self.bindings[binding].hygiene
+        self.assert_expr_only().bindings[binding].hygiene
     }
 
     pub fn expr_path_hygiene(&self, expr: ExprId) -> HygieneId {
-        self.ident_hygiene.get(&expr.into()).copied().unwrap_or(HygieneId::ROOT)
+        self.assert_expr_only().ident_hygiene.get(&expr.into()).copied().unwrap_or(HygieneId::ROOT)
     }
 
     pub fn pat_path_hygiene(&self, pat: PatId) -> HygieneId {
-        self.ident_hygiene.get(&pat.into()).copied().unwrap_or(HygieneId::ROOT)
+        self.assert_expr_only().ident_hygiene.get(&pat.into()).copied().unwrap_or(HygieneId::ROOT)
     }
 
     pub fn expr_or_pat_path_hygiene(&self, id: ExprOrPatId) -> HygieneId {
@@ -619,43 +782,72 @@ impl ExpressionStore {
             ExprOrPatId::PatId(id) => self.pat_path_hygiene(id),
         }
     }
+
+    #[inline]
+    pub fn exprs(&self) -> impl Iterator<Item = (ExprId, &Expr)> {
+        match &self.expr_only {
+            Some(it) => it.exprs.iter(),
+            None => const { &Arena::new() }.iter(),
+        }
+    }
+
+    #[inline]
+    pub fn pats(&self) -> impl Iterator<Item = (PatId, &Pat)> {
+        match &self.expr_only {
+            Some(it) => it.pats.iter(),
+            None => const { &Arena::new() }.iter(),
+        }
+    }
+
+    #[inline]
+    pub fn bindings(&self) -> impl Iterator<Item = (BindingId, &Binding)> {
+        match &self.expr_only {
+            Some(it) => it.bindings.iter(),
+            None => const { &Arena::new() }.iter(),
+        }
+    }
 }
 
 impl Index<ExprId> for ExpressionStore {
     type Output = Expr;
 
+    #[inline]
     fn index(&self, expr: ExprId) -> &Expr {
-        &self.exprs[expr]
+        &self.assert_expr_only().exprs[expr]
     }
 }
 
 impl Index<PatId> for ExpressionStore {
     type Output = Pat;
 
+    #[inline]
     fn index(&self, pat: PatId) -> &Pat {
-        &self.pats[pat]
+        &self.assert_expr_only().pats[pat]
     }
 }
 
 impl Index<LabelId> for ExpressionStore {
     type Output = Label;
 
+    #[inline]
     fn index(&self, label: LabelId) -> &Label {
-        &self.labels[label]
+        &self.assert_expr_only().labels[label]
     }
 }
 
 impl Index<BindingId> for ExpressionStore {
     type Output = Binding;
 
+    #[inline]
     fn index(&self, b: BindingId) -> &Binding {
-        &self.bindings[b]
+        &self.assert_expr_only().bindings[b]
     }
 }
 
 impl Index<TypeRefId> for ExpressionStore {
     type Output = TypeRef;
 
+    #[inline]
     fn index(&self, b: TypeRefId) -> &TypeRef {
         &self.types[b]
     }
@@ -664,6 +856,7 @@ impl Index<TypeRefId> for ExpressionStore {
 impl Index<LifetimeRefId> for ExpressionStore {
     type Output = LifetimeRef;
 
+    #[inline]
     fn index(&self, b: LifetimeRefId) -> &LifetimeRef {
         &self.lifetimes[b]
     }
@@ -684,12 +877,6 @@ impl Index<PathId> for ExpressionStore {
 // FIXME: Change `node_` prefix to something more reasonable.
 // Perhaps `expr_syntax` and `expr_id`?
 impl ExpressionStoreSourceMap {
-    pub fn empty_singleton() -> Arc<Self> {
-        static EMPTY: LazyLock<Arc<ExpressionStoreSourceMap>> =
-            LazyLock::new(|| Arc::new(ExpressionStoreSourceMap::default()));
-        EMPTY.clone()
-    }
-
     pub fn expr_or_pat_syntax(&self, id: ExprOrPatId) -> Result<ExprOrPatSource, SyntheticSyntax> {
         match id {
             ExprOrPatId::ExprId(id) => self.expr_syntax(id),
@@ -697,30 +884,46 @@ impl ExpressionStoreSourceMap {
         }
     }
 
+    #[inline]
+    fn expr_or_synthetic(&self) -> Result<&ExpressionOnlySourceMap, SyntheticSyntax> {
+        self.expr_only.as_deref().ok_or(SyntheticSyntax)
+    }
+
+    #[inline]
+    fn expr_only(&self) -> Option<&ExpressionOnlySourceMap> {
+        self.expr_only.as_deref()
+    }
+
+    #[inline]
+    #[track_caller]
+    fn assert_expr_only(&self) -> &ExpressionOnlySourceMap {
+        self.expr_only.as_ref().expect("should have `ExpressionStoreSourceMap::expr_only`")
+    }
+
     pub fn expr_syntax(&self, expr: ExprId) -> Result<ExprOrPatSource, SyntheticSyntax> {
-        self.expr_map_back.get(expr).cloned().ok_or(SyntheticSyntax)
+        self.expr_or_synthetic()?.expr_map_back.get(expr).cloned().ok_or(SyntheticSyntax)
     }
 
     pub fn node_expr(&self, node: InFile<&ast::Expr>) -> Option<ExprOrPatId> {
         let src = node.map(AstPtr::new);
-        self.expr_map.get(&src).cloned()
+        self.expr_only()?.expr_map.get(&src).cloned()
     }
 
     pub fn node_macro_file(&self, node: InFile<&ast::MacroCall>) -> Option<MacroCallId> {
         let src = node.map(AstPtr::new);
-        self.expansions.get(&src).cloned()
+        self.expr_only()?.expansions.get(&src).cloned()
     }
 
     pub fn macro_calls(&self) -> impl Iterator<Item = (InFile<MacroCallPtr>, MacroCallId)> + '_ {
-        self.expansions.iter().map(|(&a, &b)| (a, b))
+        self.expr_only().into_iter().flat_map(|it| it.expansions.iter().map(|(&a, &b)| (a, b)))
     }
 
     pub fn pat_syntax(&self, pat: PatId) -> Result<ExprOrPatSource, SyntheticSyntax> {
-        self.pat_map_back.get(pat).cloned().ok_or(SyntheticSyntax)
+        self.expr_or_synthetic()?.pat_map_back.get(pat).cloned().ok_or(SyntheticSyntax)
     }
 
     pub fn node_pat(&self, node: InFile<&ast::Pat>) -> Option<ExprOrPatId> {
-        self.pat_map.get(&node.map(AstPtr::new)).cloned()
+        self.expr_only()?.pat_map.get(&node.map(AstPtr::new)).cloned()
     }
 
     pub fn type_syntax(&self, id: TypeRefId) -> Result<TypeSource, SyntheticSyntax> {
@@ -732,49 +935,50 @@ impl ExpressionStoreSourceMap {
     }
 
     pub fn label_syntax(&self, label: LabelId) -> LabelSource {
-        self.label_map_back[label]
+        self.assert_expr_only().label_map_back[label]
     }
 
     pub fn patterns_for_binding(&self, binding: BindingId) -> &[PatId] {
-        self.binding_definitions.get(binding).map_or(&[], Deref::deref)
+        self.assert_expr_only().binding_definitions.get(binding).map_or(&[], Deref::deref)
     }
 
     pub fn node_label(&self, node: InFile<&ast::Label>) -> Option<LabelId> {
         let src = node.map(AstPtr::new);
-        self.label_map.get(&src).cloned()
+        self.expr_only()?.label_map.get(&src).cloned()
     }
 
     pub fn field_syntax(&self, expr: ExprId) -> FieldSource {
-        self.field_map_back[&expr]
+        self.assert_expr_only().field_map_back[&expr]
     }
 
     pub fn pat_field_syntax(&self, pat: PatId) -> PatFieldSource {
-        self.pat_field_map_back[&pat]
+        self.assert_expr_only().pat_field_map_back[&pat]
     }
 
     pub fn macro_expansion_expr(&self, node: InFile<&ast::MacroExpr>) -> Option<ExprOrPatId> {
         let src = node.map(AstPtr::new).map(AstPtr::upcast::<ast::MacroExpr>).map(AstPtr::upcast);
-        self.expr_map.get(&src).copied()
+        self.expr_only()?.expr_map.get(&src).copied()
     }
 
     pub fn expansions(&self) -> impl Iterator<Item = (&InFile<MacroCallPtr>, &MacroCallId)> {
-        self.expansions.iter()
+        self.expr_only().into_iter().flat_map(|it| it.expansions.iter())
     }
 
     pub fn expansion(&self, node: InFile<&ast::MacroCall>) -> Option<MacroCallId> {
-        self.expansions.get(&node.map(AstPtr::new)).copied()
+        self.expr_only()?.expansions.get(&node.map(AstPtr::new)).copied()
     }
 
     pub fn implicit_format_args(
         &self,
         node: InFile<&ast::FormatArgsExpr>,
     ) -> Option<(HygieneId, &[(syntax::TextRange, Name)])> {
+        let expr_only = self.expr_only()?;
         let src = node.map(AstPtr::new).map(AstPtr::upcast::<ast::Expr>);
-        let (hygiene, names) = self
+        let (hygiene, names) = expr_only
             .template_map
             .as_ref()?
             .format_args_to_captures
-            .get(&self.expr_map.get(&src)?.as_expr()?)?;
+            .get(&expr_only.expr_map.get(&src)?.as_expr()?)?;
         Some((*hygiene, &**names))
     }
 
@@ -782,67 +986,28 @@ impl ExpressionStoreSourceMap {
         &self,
         capture_expr: ExprId,
     ) -> Option<InFile<(ExprPtr, TextRange)>> {
-        self.template_map.as_ref()?.implicit_capture_to_source.get(&capture_expr).copied()
+        self.expr_only()?
+            .template_map
+            .as_ref()?
+            .implicit_capture_to_source
+            .get(&capture_expr)
+            .copied()
     }
 
     pub fn asm_template_args(
         &self,
         node: InFile<&ast::AsmExpr>,
     ) -> Option<(ExprId, &[Vec<(syntax::TextRange, usize)>])> {
+        let expr_only = self.expr_only()?;
         let src = node.map(AstPtr::new).map(AstPtr::upcast::<ast::Expr>);
-        let expr = self.expr_map.get(&src)?.as_expr()?;
-        Some(expr)
-            .zip(self.template_map.as_ref()?.asm_to_captures.get(&expr).map(std::ops::Deref::deref))
+        let expr = expr_only.expr_map.get(&src)?.as_expr()?;
+        Some(expr).zip(
+            expr_only.template_map.as_ref()?.asm_to_captures.get(&expr).map(std::ops::Deref::deref),
+        )
     }
 
     /// Get a reference to the source map's diagnostics.
     pub fn diagnostics(&self) -> &[ExpressionStoreDiagnostics] {
-        &self.diagnostics
-    }
-
-    fn shrink_to_fit(&mut self) {
-        let Self {
-            expr_map,
-            expr_map_back,
-            pat_map,
-            pat_map_back,
-            label_map,
-            label_map_back,
-            field_map_back,
-            pat_field_map_back,
-            expansions,
-            template_map,
-            diagnostics,
-            binding_definitions,
-            types_map,
-            types_map_back,
-            lifetime_map_back,
-            lifetime_map,
-        } = self;
-        if let Some(template_map) = template_map {
-            let FormatTemplate {
-                format_args_to_captures,
-                asm_to_captures,
-                implicit_capture_to_source,
-            } = &mut **template_map;
-            format_args_to_captures.shrink_to_fit();
-            asm_to_captures.shrink_to_fit();
-            implicit_capture_to_source.shrink_to_fit();
-        }
-        expr_map.shrink_to_fit();
-        expr_map_back.shrink_to_fit();
-        pat_map.shrink_to_fit();
-        pat_map_back.shrink_to_fit();
-        label_map.shrink_to_fit();
-        label_map_back.shrink_to_fit();
-        field_map_back.shrink_to_fit();
-        pat_field_map_back.shrink_to_fit();
-        expansions.shrink_to_fit();
-        diagnostics.shrink_to_fit();
-        binding_definitions.shrink_to_fit();
-        types_map.shrink_to_fit();
-        types_map_back.shrink_to_fit();
-        lifetime_map.shrink_to_fit();
-        lifetime_map_back.shrink_to_fit();
+        self.expr_only().map(|it| &*it.diagnostics).unwrap_or_default()
     }
 }
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/body.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/body.rs
index fb6d931e0e4..c955393b9cf 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/body.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/body.rs
@@ -36,6 +36,7 @@ pub struct Body {
 impl ops::Deref for Body {
     type Target = ExpressionStore;
 
+    #[inline]
     fn deref(&self) -> &Self::Target {
         &self.store
     }
@@ -61,6 +62,7 @@ pub struct BodySourceMap {
 impl ops::Deref for BodySourceMap {
     type Target = ExpressionStoreSourceMap;
 
+    #[inline]
     fn deref(&self) -> &Self::Target {
         &self.store
     }
@@ -102,9 +104,7 @@ impl Body {
             }
         };
         let module = def.module(db);
-        let (body, mut source_map) =
-            lower_body(db, def, file_id, module, params, body, is_async_fn);
-        source_map.store.shrink_to_fit();
+        let (body, source_map) = lower_body(db, def, file_id, module, params, body, is_async_fn);
 
         (Arc::new(body), Arc::new(source_map))
     }
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower.rs
index c0e51b338b4..4e877748ca2 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower.rs
@@ -121,14 +121,10 @@ pub(super) fn lower_body(
             params = (0..count).map(|_| collector.missing_pat()).collect();
         };
         let body_expr = collector.missing_expr();
+        let (store, source_map) = collector.store.finish();
         return (
-            Body {
-                store: collector.store.finish(),
-                params: params.into_boxed_slice(),
-                self_param,
-                body_expr,
-            },
-            BodySourceMap { self_param: source_map_self_param, store: collector.source_map },
+            Body { store, params: params.into_boxed_slice(), self_param, body_expr },
+            BodySourceMap { self_param: source_map_self_param, store: source_map },
         );
     }
 
@@ -171,14 +167,10 @@ pub(super) fn lower_body(
         },
     );
 
+    let (store, source_map) = collector.store.finish();
     (
-        Body {
-            store: collector.store.finish(),
-            params: params.into_boxed_slice(),
-            self_param,
-            body_expr,
-        },
-        BodySourceMap { self_param: source_map_self_param, store: collector.source_map },
+        Body { store, params: params.into_boxed_slice(), self_param, body_expr },
+        BodySourceMap { self_param: source_map_self_param, store: source_map },
     )
 }
 
@@ -190,7 +182,8 @@ pub(crate) fn lower_type_ref(
     let mut expr_collector = ExprCollector::new(db, module, type_ref.file_id);
     let type_ref =
         expr_collector.lower_type_ref_opt(type_ref.value, &mut ExprCollector::impl_trait_allocator);
-    (expr_collector.store.finish(), expr_collector.source_map, type_ref)
+    let (store, source_map) = expr_collector.store.finish();
+    (store, source_map, type_ref)
 }
 
 pub(crate) fn lower_generic_params(
@@ -205,7 +198,8 @@ pub(crate) fn lower_generic_params(
     let mut collector = generics::GenericParamsCollector::new(def);
     collector.lower(&mut expr_collector, param_list, where_clause);
     let params = collector.finish();
-    (Arc::new(expr_collector.store.finish()), params, expr_collector.source_map)
+    let (store, source_map) = expr_collector.store.finish();
+    (Arc::new(store), params, source_map)
 }
 
 pub(crate) fn lower_impl(
@@ -232,7 +226,8 @@ pub(crate) fn lower_impl(
         impl_syntax.value.where_clause(),
     );
     let params = collector.finish();
-    (expr_collector.store.finish(), expr_collector.source_map, self_ty, trait_, params)
+    let (store, source_map) = expr_collector.store.finish();
+    (store, source_map, self_ty, trait_, params)
 }
 
 pub(crate) fn lower_trait(
@@ -253,7 +248,8 @@ pub(crate) fn lower_trait(
         trait_syntax.value.where_clause(),
     );
     let params = collector.finish();
-    (expr_collector.store.finish(), expr_collector.source_map, params)
+    let (store, source_map) = expr_collector.store.finish();
+    (store, source_map, params)
 }
 
 pub(crate) fn lower_trait_alias(
@@ -274,7 +270,8 @@ pub(crate) fn lower_trait_alias(
         trait_syntax.value.where_clause(),
     );
     let params = collector.finish();
-    (expr_collector.store.finish(), expr_collector.source_map, params)
+    let (store, source_map) = expr_collector.store.finish();
+    (store, source_map, params)
 }
 
 pub(crate) fn lower_type_alias(
@@ -313,7 +310,8 @@ pub(crate) fn lower_type_alias(
         .value
         .ty()
         .map(|ty| expr_collector.lower_type_ref(ty, &mut ExprCollector::impl_trait_allocator));
-    (expr_collector.store.finish(), expr_collector.source_map, params, bounds, type_ref)
+    let (store, source_map) = expr_collector.store.finish();
+    (store, source_map, params, bounds, type_ref)
 }
 
 pub(crate) fn lower_function(
@@ -421,9 +419,10 @@ pub(crate) fn lower_function(
     } else {
         return_type
     };
+    let (store, source_map) = expr_collector.store.finish();
     (
-        expr_collector.store.finish(),
-        expr_collector.source_map,
+        store,
+        source_map,
         generics,
         params.into_boxed_slice(),
         return_type,
@@ -440,7 +439,6 @@ pub struct ExprCollector<'db> {
     local_def_map: &'db LocalDefMap,
     module: ModuleId,
     pub store: ExpressionStoreBuilder,
-    pub(crate) source_map: ExpressionStoreSourceMap,
 
     // state stuff
     // Prevent nested impl traits like `impl Foo<impl Bar>`.
@@ -551,7 +549,6 @@ impl ExprCollector<'_> {
             module,
             def_map,
             local_def_map,
-            source_map: ExpressionStoreSourceMap::default(),
             store: ExpressionStoreBuilder::default(),
             expander,
             current_try_block_label: None,
@@ -698,7 +695,7 @@ impl ExprCollector<'_> {
                     let id = self.collect_macro_call(mcall, macro_ptr, true, |this, expansion| {
                         this.lower_type_ref_opt(expansion, impl_trait_lower_fn)
                     });
-                    self.source_map.types_map.insert(src, id);
+                    self.store.types_map.insert(src, id);
                     return id;
                 }
                 None => TypeRef::Error,
@@ -732,8 +729,8 @@ impl ExprCollector<'_> {
     fn alloc_type_ref(&mut self, type_ref: TypeRef, node: TypePtr) -> TypeRefId {
         let id = self.store.types.alloc(type_ref);
         let ptr = self.expander.in_file(node);
-        self.source_map.types_map_back.insert(id, ptr);
-        self.source_map.types_map.insert(ptr, id);
+        self.store.types_map_back.insert(id, ptr);
+        self.store.types_map.insert(ptr, id);
         id
     }
 
@@ -744,8 +741,8 @@ impl ExprCollector<'_> {
     ) -> LifetimeRefId {
         let id = self.store.lifetimes.alloc(lifetime_ref);
         let ptr = self.expander.in_file(node);
-        self.source_map.lifetime_map_back.insert(id, ptr);
-        self.source_map.lifetime_map.insert(ptr, id);
+        self.store.lifetime_map_back.insert(id, ptr);
+        self.store.lifetime_map.insert(ptr, id);
         id
     }
 
@@ -1190,14 +1187,14 @@ impl ExprCollector<'_> {
             }
             ast::Expr::ContinueExpr(e) => {
                 let label = self.resolve_label(e.lifetime()).unwrap_or_else(|e| {
-                    self.source_map.diagnostics.push(e);
+                    self.store.diagnostics.push(e);
                     None
                 });
                 self.alloc_expr(Expr::Continue { label }, syntax_ptr)
             }
             ast::Expr::BreakExpr(e) => {
                 let label = self.resolve_label(e.lifetime()).unwrap_or_else(|e| {
-                    self.source_map.diagnostics.push(e);
+                    self.store.diagnostics.push(e);
                     None
                 });
                 let expr = e.expr().map(|e| self.collect_expr(e));
@@ -1207,7 +1204,7 @@ impl ExprCollector<'_> {
                 let inner = self.collect_expr_opt(e.expr());
                 // make the paren expr point to the inner expression as well for IDE resolution
                 let src = self.expander.in_file(syntax_ptr);
-                self.source_map.expr_map.insert(src, inner.into());
+                self.store.expr_map.insert(src, inner.into());
                 inner
             }
             ast::Expr::ReturnExpr(e) => {
@@ -1248,7 +1245,7 @@ impl ExprCollector<'_> {
                                 None => self.missing_expr(),
                             };
                             let src = self.expander.in_file(AstPtr::new(&field));
-                            self.source_map.field_map_back.insert(expr, src);
+                            self.store.field_map_back.insert(expr, src);
                             Some(RecordLitField { name, expr })
                         })
                         .collect();
@@ -1271,12 +1268,10 @@ impl ExprCollector<'_> {
             ast::Expr::AwaitExpr(e) => {
                 let expr = self.collect_expr_opt(e.expr());
                 if let Awaitable::No(location) = self.is_lowering_awaitable_block() {
-                    self.source_map.diagnostics.push(
-                        ExpressionStoreDiagnostics::AwaitOutsideOfAsync {
-                            node: self.expander.in_file(AstPtr::new(&e)),
-                            location: location.to_string(),
-                        },
-                    );
+                    self.store.diagnostics.push(ExpressionStoreDiagnostics::AwaitOutsideOfAsync {
+                        node: self.expander.in_file(AstPtr::new(&e)),
+                        location: location.to_string(),
+                    });
                 }
                 self.alloc_expr(Expr::Await { expr }, syntax_ptr)
             }
@@ -1442,7 +1437,7 @@ impl ExprCollector<'_> {
                         // Make the macro-call point to its expanded expression so we can query
                         // semantics on syntax pointers to the macro
                         let src = self.expander.in_file(syntax_ptr);
-                        self.source_map.expr_map.insert(src, id.into());
+                        self.store.expr_map.insert(src, id.into());
                         id
                     }
                     None => self.alloc_expr(Expr::Missing, syntax_ptr),
@@ -1486,7 +1481,7 @@ impl ExprCollector<'_> {
             let expr = self.collect_expr(expr);
             // Do not use `alloc_pat_from_expr()` here, it will override the entry in `expr_map`.
             let id = self.store.pats.alloc(Pat::Expr(expr));
-            self.source_map.pat_map_back.insert(id, src);
+            self.store.pat_map_back.insert(id, src);
             id
         })
     }
@@ -1555,7 +1550,7 @@ impl ExprCollector<'_> {
                 let id = self.collect_macro_call(e, macro_ptr, true, |this, expansion| {
                     this.collect_expr_as_pat_opt(expansion)
                 });
-                self.source_map.expr_map.insert(src, id.into());
+                self.store.expr_map.insert(src, id.into());
                 id
             }
             ast::Expr::RecordExpr(e) => {
@@ -1576,7 +1571,7 @@ impl ExprCollector<'_> {
                         let pat = self.collect_expr_as_pat(field_expr);
                         let name = f.field_name()?.as_name();
                         let src = self.expander.in_file(AstPtr::new(&f).wrap_left());
-                        self.source_map.pat_field_map_back.insert(pat, src);
+                        self.store.pat_field_map_back.insert(pat, src);
                         Some(RecordFieldPat { name, pat })
                     })
                     .collect();
@@ -1622,7 +1617,7 @@ impl ExprCollector<'_> {
                         );
                         if let Either::Left(pat) = pat {
                             let src = this.expander.in_file(AstPtr::new(&expr).wrap_left());
-                            this.source_map.pat_map_back.insert(pat, src);
+                            this.store.pat_map_back.insert(pat, src);
                         }
                         pat
                     }
@@ -1968,7 +1963,7 @@ impl ExprCollector<'_> {
                     self.module.krate(),
                     resolver,
                     &mut |ptr, call| {
-                        _ = self.source_map.expansions.insert(ptr.map(|(it, _)| it), call);
+                        _ = self.store.expansions.insert(ptr.map(|(it, _)| it), call);
                     },
                 )
             }
@@ -1978,19 +1973,17 @@ impl ExprCollector<'_> {
             Ok(res) => res,
             Err(UnresolvedMacro { path }) => {
                 if record_diagnostics {
-                    self.source_map.diagnostics.push(
-                        ExpressionStoreDiagnostics::UnresolvedMacroCall {
-                            node: self.expander.in_file(syntax_ptr),
-                            path,
-                        },
-                    );
+                    self.store.diagnostics.push(ExpressionStoreDiagnostics::UnresolvedMacroCall {
+                        node: self.expander.in_file(syntax_ptr),
+                        path,
+                    });
                 }
                 return collector(self, None);
             }
         };
         if record_diagnostics {
             if let Some(err) = res.err {
-                self.source_map
+                self.store
                     .diagnostics
                     .push(ExpressionStoreDiagnostics::MacroError { node: macro_call_ptr, err });
             }
@@ -2001,7 +1994,7 @@ impl ExprCollector<'_> {
                 // Keep collecting even with expansion errors so we can provide completions and
                 // other services in incomplete macro expressions.
                 if let Some(macro_file) = self.expander.current_file_id().macro_file() {
-                    self.source_map.expansions.insert(macro_call_ptr, macro_file);
+                    self.store.expansions.insert(macro_call_ptr, macro_file);
                 }
 
                 if record_diagnostics {
@@ -2050,7 +2043,7 @@ impl ExprCollector<'_> {
             // Make the macro-call point to its expanded expression so we can query
             // semantics on syntax pointers to the macro
             let src = self.expander.in_file(syntax_ptr);
-            self.source_map.expr_map.insert(src, tail.into());
+            self.store.expr_map.insert(src, tail.into());
         })
     }
 
@@ -2361,7 +2354,7 @@ impl ExprCollector<'_> {
                         let pat = self.collect_pat(ast_pat, binding_list);
                         let name = f.field_name()?.as_name();
                         let src = self.expander.in_file(AstPtr::new(&f).wrap_right());
-                        self.source_map.pat_field_map_back.insert(pat, src);
+                        self.store.pat_field_map_back.insert(pat, src);
                         Some(RecordFieldPat { name, pat })
                     })
                     .collect();
@@ -2424,7 +2417,7 @@ impl ExprCollector<'_> {
                         self.collect_macro_call(call, macro_ptr, true, |this, expanded_pat| {
                             this.collect_pat_opt(expanded_pat, binding_list)
                         });
-                    self.source_map.pat_map.insert(src, pat.into());
+                    self.store.pat_map.insert(src, pat.into());
                     return pat;
                 }
                 None => Pat::Missing,
@@ -2515,7 +2508,7 @@ impl ExprCollector<'_> {
                             }
                         });
                     if let Some(pat) = pat.left() {
-                        self.source_map.pat_map.insert(src, pat.into());
+                        self.store.pat_map.insert(src, pat.into());
                     }
                     pat
                 }
@@ -2537,7 +2530,7 @@ impl ExprCollector<'_> {
         match enabled {
             Ok(()) => true,
             Err(cfg) => {
-                self.source_map.diagnostics.push(ExpressionStoreDiagnostics::InactiveCode {
+                self.store.diagnostics.push(ExpressionStoreDiagnostics::InactiveCode {
                     node: self.expander.in_file(SyntaxNodePtr::new(owner.syntax())),
                     cfg,
                     opts: self.cfg_options.clone(),
@@ -2548,7 +2541,7 @@ impl ExprCollector<'_> {
     }
 
     fn add_definition_to_binding(&mut self, binding_id: BindingId, pat_id: PatId) {
-        self.source_map.binding_definitions.entry(binding_id).or_default().push(pat_id);
+        self.store.binding_definitions.entry(binding_id).or_default().push(pat_id);
     }
 
     // region: labels
@@ -2724,7 +2717,7 @@ impl ExprCollector<'_> {
                     |name, range| {
                         let expr_id = self.alloc_expr_desugared(Expr::Path(Path::from(name)));
                         if let Some(range) = range {
-                            self.source_map
+                            self.store
                                 .template_map
                                 .get_or_insert_with(Default::default)
                                 .implicit_capture_to_source
@@ -2836,7 +2829,7 @@ impl ExprCollector<'_> {
             )
         };
 
-        self.source_map
+        self.store
             .template_map
             .get_or_insert_with(Default::default)
             .format_args_to_captures
@@ -3386,8 +3379,8 @@ impl ExprCollector<'_> {
     fn alloc_expr(&mut self, expr: Expr, ptr: ExprPtr) -> ExprId {
         let src = self.expander.in_file(ptr);
         let id = self.store.exprs.alloc(expr);
-        self.source_map.expr_map_back.insert(id, src.map(AstPtr::wrap_left));
-        self.source_map.expr_map.insert(src, id.into());
+        self.store.expr_map_back.insert(id, src.map(AstPtr::wrap_left));
+        self.store.expr_map.insert(src, id.into());
         id
     }
     // FIXME: desugared exprs don't have ptr, that's wrong and should be fixed.
@@ -3398,9 +3391,9 @@ impl ExprCollector<'_> {
     fn alloc_expr_desugared_with_ptr(&mut self, expr: Expr, ptr: ExprPtr) -> ExprId {
         let src = self.expander.in_file(ptr);
         let id = self.store.exprs.alloc(expr);
-        self.source_map.expr_map_back.insert(id, src.map(AstPtr::wrap_left));
+        self.store.expr_map_back.insert(id, src.map(AstPtr::wrap_left));
         // We intentionally don't fill this as it could overwrite a non-desugared entry
-        // self.source_map.expr_map.insert(src, id);
+        // self.store.expr_map.insert(src, id);
         id
     }
     fn missing_expr(&mut self) -> ExprId {
@@ -3423,24 +3416,24 @@ impl ExprCollector<'_> {
     fn alloc_pat_from_expr(&mut self, pat: Pat, ptr: ExprPtr) -> PatId {
         let src = self.expander.in_file(ptr);
         let id = self.store.pats.alloc(pat);
-        self.source_map.expr_map.insert(src, id.into());
-        self.source_map.pat_map_back.insert(id, src.map(AstPtr::wrap_left));
+        self.store.expr_map.insert(src, id.into());
+        self.store.pat_map_back.insert(id, src.map(AstPtr::wrap_left));
         id
     }
 
     fn alloc_expr_from_pat(&mut self, expr: Expr, ptr: PatPtr) -> ExprId {
         let src = self.expander.in_file(ptr);
         let id = self.store.exprs.alloc(expr);
-        self.source_map.pat_map.insert(src, id.into());
-        self.source_map.expr_map_back.insert(id, src.map(AstPtr::wrap_right));
+        self.store.pat_map.insert(src, id.into());
+        self.store.expr_map_back.insert(id, src.map(AstPtr::wrap_right));
         id
     }
 
     fn alloc_pat(&mut self, pat: Pat, ptr: PatPtr) -> PatId {
         let src = self.expander.in_file(ptr);
         let id = self.store.pats.alloc(pat);
-        self.source_map.pat_map_back.insert(id, src.map(AstPtr::wrap_right));
-        self.source_map.pat_map.insert(src, id.into());
+        self.store.pat_map_back.insert(id, src.map(AstPtr::wrap_right));
+        self.store.pat_map.insert(src, id.into());
         id
     }
     // FIXME: desugared pats don't have ptr, that's wrong and should be fixed somehow.
@@ -3454,8 +3447,8 @@ impl ExprCollector<'_> {
     fn alloc_label(&mut self, label: Label, ptr: LabelPtr) -> LabelId {
         let src = self.expander.in_file(ptr);
         let id = self.store.labels.alloc(label);
-        self.source_map.label_map_back.insert(id, src);
-        self.source_map.label_map.insert(src, id);
+        self.store.label_map_back.insert(id, src);
+        self.store.label_map.insert(src, id);
         id
     }
     // FIXME: desugared labels don't have ptr, that's wrong and should be fixed somehow.
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower/asm.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower/asm.rs
index d36e5205c73..3bc4afb5c8a 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower/asm.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower/asm.rs
@@ -10,7 +10,7 @@ use tt::TextRange;
 
 use crate::{
     expr_store::lower::{ExprCollector, FxIndexSet},
-    hir::{AsmOperand, AsmOptions, Expr, ExprId, InlineAsm, InlineAsmRegOrRegClass},
+    hir::{AsmOperand, AsmOptions, Expr, ExprId, InlineAsm, InlineAsmKind, InlineAsmRegOrRegClass},
 };
 
 impl ExprCollector<'_> {
@@ -269,11 +269,20 @@ impl ExprCollector<'_> {
                     }
                 })
         };
+
+        let kind = if asm.global_asm_token().is_some() {
+            InlineAsmKind::GlobalAsm
+        } else if asm.naked_asm_token().is_some() {
+            InlineAsmKind::NakedAsm
+        } else {
+            InlineAsmKind::Asm
+        };
+
         let idx = self.alloc_expr(
-            Expr::InlineAsm(InlineAsm { operands: operands.into_boxed_slice(), options }),
+            Expr::InlineAsm(InlineAsm { operands: operands.into_boxed_slice(), options, kind }),
             syntax_ptr,
         );
-        self.source_map
+        self.store
             .template_map
             .get_or_insert_with(Default::default)
             .asm_to_captures
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower/path/tests.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower/path/tests.rs
index 8fd81c7b3df..f507841a91b 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower/path/tests.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/lower/path/tests.rs
@@ -23,7 +23,7 @@ fn lower_path(path: ast::Path) -> (TestDB, ExpressionStore, Option<Path>) {
     let mut ctx =
         ExprCollector::new(&db, crate_def_map(&db, krate).root_module_id(), file_id.into());
     let lowered_path = ctx.lower_path(path, &mut ExprCollector::impl_trait_allocator);
-    let store = ctx.store.finish();
+    let (store, _) = ctx.store.finish();
     (db, store, lowered_path)
 }
 
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/pretty.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/pretty.rs
index 87bcd33ed7b..f1b011333d9 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/pretty.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/pretty.rs
@@ -902,7 +902,7 @@ impl Printer<'_> {
                         let mut same_name = false;
                         if let Pat::Bind { id, subpat: None } = &self.store[arg.pat] {
                             if let Binding { name, mode: BindingAnnotation::Unannotated, .. } =
-                                &self.store.bindings[*id]
+                                &self.store.assert_expr_only().bindings[*id]
                             {
                                 if name.as_str() == field_name {
                                     same_name = true;
@@ -1063,7 +1063,7 @@ impl Printer<'_> {
     }
 
     fn print_binding(&mut self, id: BindingId) {
-        let Binding { name, mode, .. } = &self.store.bindings[id];
+        let Binding { name, mode, .. } = &self.store.assert_expr_only().bindings[id];
         let mode = match mode {
             BindingAnnotation::Unannotated => "",
             BindingAnnotation::Mutable => "mut ",
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/scope.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/scope.rs
index 2dd0b9bdb86..1952dae9d71 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/scope.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/scope.rs
@@ -106,7 +106,9 @@ impl ExprScopes {
         let mut scopes = ExprScopes {
             scopes: Arena::default(),
             scope_entries: Arena::default(),
-            scope_by_expr: ArenaMap::with_capacity(body.exprs.len()),
+            scope_by_expr: ArenaMap::with_capacity(
+                body.expr_only.as_ref().map_or(0, |it| it.exprs.len()),
+            ),
         };
         let mut root = scopes.root_scope();
         if let Some(self_param) = body.self_param {
@@ -179,7 +181,7 @@ impl ExprScopes {
         binding: BindingId,
         hygiene: HygieneId,
     ) {
-        let Binding { name, .. } = &store.bindings[binding];
+        let Binding { name, .. } = &store[binding];
         let entry = self.scope_entries.alloc(ScopeEntry { name: name.clone(), binding, hygiene });
         self.scopes[scope].entries =
             IdxRange::new_inclusive(self.scopes[scope].entries.start()..=entry);
@@ -251,7 +253,7 @@ fn compute_expr_scopes(
     scope: &mut ScopeId,
 ) {
     let make_label =
-        |label: &Option<LabelId>| label.map(|label| (label, store.labels[label].name.clone()));
+        |label: &Option<LabelId>| label.map(|label| (label, store[label].name.clone()));
 
     let compute_expr_scopes = |scopes: &mut ExprScopes, expr: ExprId, scope: &mut ScopeId| {
         compute_expr_scopes(expr, store, scopes, scope)
@@ -534,9 +536,8 @@ fn foo() {
         };
 
         let resolved = scopes.resolve_name_in_scope(expr_scope, &name_ref.as_name()).unwrap();
-        let pat_src = source_map
-            .pat_syntax(*source_map.binding_definitions[resolved.binding()].first().unwrap())
-            .unwrap();
+        let pat_src =
+            source_map.pat_syntax(source_map.patterns_for_binding(resolved.binding())[0]).unwrap();
 
         let local_name = pat_src.value.syntax_node_ptr().to_node(file.syntax());
         assert_eq!(local_name.text_range(), expected_name.syntax().text_range());
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/tests/body.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/tests/body.rs
index 927e280d739..c31428be28f 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store/tests/body.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store/tests/body.rs
@@ -508,9 +508,9 @@ fn f() {
 }
     "#,
     );
-    assert_eq!(body.bindings.len(), 1, "should have a binding for `B`");
+    assert_eq!(body.assert_expr_only().bindings.len(), 1, "should have a binding for `B`");
     assert_eq!(
-        body.bindings[BindingId::from_raw(RawIdx::from_u32(0))].name.as_str(),
+        body[BindingId::from_raw(RawIdx::from_u32(0))].name.as_str(),
         "B",
         "should have a binding for `B`",
     );
@@ -566,6 +566,7 @@ const fn f(x: i32) -> i32 {
     );
 
     let mtch_arms = body
+        .assert_expr_only()
         .exprs
         .iter()
         .find_map(|(_, expr)| {
@@ -578,10 +579,10 @@ const fn f(x: i32) -> i32 {
         .unwrap();
 
     let MatchArm { pat, .. } = mtch_arms[1];
-    match body.pats[pat] {
+    match body[pat] {
         Pat::Range { start, end } => {
-            let hir_start = &body.exprs[start.unwrap()];
-            let hir_end = &body.exprs[end.unwrap()];
+            let hir_start = &body[start.unwrap()];
+            let hir_end = &body[end.unwrap()];
 
             assert!(matches!(hir_start, Expr::Path { .. }));
             assert!(matches!(hir_end, Expr::Path { .. }));
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/hir.rs b/src/tools/rust-analyzer/crates/hir-def/src/hir.rs
index 0fc7857d978..e70cd2cd6c5 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/hir.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/hir.rs
@@ -332,6 +332,17 @@ pub struct OffsetOf {
 pub struct InlineAsm {
     pub operands: Box<[(Option<Name>, AsmOperand)]>,
     pub options: AsmOptions,
+    pub kind: InlineAsmKind,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum InlineAsmKind {
+    /// `asm!()`.
+    Asm,
+    /// `global_asm!()`.
+    GlobalAsm,
+    /// `naked_asm!()`.
+    NakedAsm,
 }
 
 #[derive(Clone, Copy, PartialEq, Eq, Hash)]
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/item_tree/lower.rs b/src/tools/rust-analyzer/crates/hir-def/src/item_tree/lower.rs
index f3273667158..5ab61c89394 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/item_tree/lower.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/item_tree/lower.rs
@@ -143,6 +143,8 @@ impl<'a> Ctx<'a> {
             ast::Item::MacroRules(ast) => self.lower_macro_rules(ast)?.into(),
             ast::Item::MacroDef(ast) => self.lower_macro_def(ast)?.into(),
             ast::Item::ExternBlock(ast) => self.lower_extern_block(ast).into(),
+            // FIXME: Handle `global_asm!()`.
+            ast::Item::AsmExpr(_) => return None,
         };
         let attrs = RawAttrs::new(self.db, item, self.span_map());
         self.add_attrs(mod_item.ast_id(), attrs);
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/item_tree/tests.rs b/src/tools/rust-analyzer/crates/hir-def/src/item_tree/tests.rs
index 5923b3ea491..91b42bef8f7 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/item_tree/tests.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/item_tree/tests.rs
@@ -35,10 +35,10 @@ use a::{c, d::{e}};
             #![no_std]
             #![doc = " another file comment"]
 
-            // AstId: ExternCrate[5A82, 0]
+            // AstId: ExternCrate[070B, 0]
             pub(self) extern crate self as renamed;
 
-            // AstId: ExternCrate[7E1C, 0]
+            // AstId: ExternCrate[1EA5, 0]
             pub(in super) extern crate bli;
 
             // AstId: Use[0000, 0]
@@ -78,15 +78,15 @@ extern "C" {
             // AstId: ExternBlock[0000, 0]
             extern {
                 #[on_extern_type]
-                // AstId: TypeAlias[9FDF, 0]
+                // AstId: TypeAlias[A09C, 0]
                 pub(self) type ExType;
 
                 #[on_extern_static]
-                // AstId: Static[43C1, 0]
+                // AstId: Static[D85E, 0]
                 pub(self) static EX_STATIC = _;
 
                 #[on_extern_fn]
-                // AstId: Fn[452D, 0]
+                // AstId: Fn[B240, 0]
                 pub(self) fn ex_fn;
             }
         "#]],
@@ -124,20 +124,20 @@ enum E {
 }
         "#,
         expect![[r#"
-            // AstId: Struct[DFF3, 0]
+            // AstId: Struct[ED35, 0]
             pub(self) struct Unit;
 
             #[derive(Debug)]
-            // AstId: Struct[C7A1, 0]
+            // AstId: Struct[A47C, 0]
             pub(self) struct Struct { ... }
 
-            // AstId: Struct[DAC2, 0]
+            // AstId: Struct[C8C9, 0]
             pub(self) struct Tuple(...);
 
-            // AstId: Union[2DBB, 0]
+            // AstId: Union[2797, 0]
             pub(self) union Ize { ... }
 
-            // AstId: Enum[7FF8, 0]
+            // AstId: Enum[7D23, 0]
             pub(self) enum E { ... }
         "#]],
     );
@@ -162,18 +162,18 @@ trait Tr: SuperTrait + 'lifetime {
 }
         "#,
         expect![[r#"
-            // AstId: Static[B393, 0]
+            // AstId: Static[F7C1, 0]
             pub static ST = _;
 
-            // AstId: Const[B309, 0]
+            // AstId: Const[84BB, 0]
             pub(self) const _ = _;
 
             #[attr]
             #[inner_attr_in_fn]
-            // AstId: Fn[75E3, 0]
+            // AstId: Fn[BE8F, 0]
             pub(self) fn f;
 
-            // AstId: Trait[2998, 0]
+            // AstId: Trait[9320, 0]
             pub(self) trait Tr { ... }
         "#]],
     );
@@ -197,16 +197,16 @@ mod outline;
         expect![[r##"
             #[doc = " outer"]
             #[doc = " inner"]
-            // AstId: Module[CF93, 0]
+            // AstId: Module[03AE, 0]
             pub(self) mod inline {
                 // AstId: Use[0000, 0]
                 pub(self) use super::*;
 
-                // AstId: Fn[1B26, 0]
+                // AstId: Fn[2A78, 0]
                 pub(self) fn fn_in_module;
             }
 
-            // AstId: Module[8994, 0]
+            // AstId: Module[C08B, 0]
             pub(self) mod outline;
         "##]],
     );
@@ -225,13 +225,13 @@ pub macro m2() {}
 m!();
         "#,
         expect![[r#"
-            // AstId: MacroRules[88CE, 0]
+            // AstId: MacroRules[7E68, 0]
             macro_rules! m { ... }
 
-            // AstId: MacroDef[DC34, 0]
+            // AstId: MacroDef[1C1E, 0]
             pub macro m2 { ... }
 
-            // AstId: MacroCall[612F, 0], SyntaxContextId: ROOT2024, ExpandTo: Items
+            // AstId: MacroCall[7E68, 0], SyntaxContextId: ROOT2024, ExpandTo: Items
             m!(...);
         "#]],
     );
@@ -244,7 +244,7 @@ fn pub_self() {
 pub(self) struct S;
         "#,
         expect![[r#"
-            // AstId: Struct[42E2, 0]
+            // AstId: Struct[5024, 0]
             pub(self) struct S;
         "#]],
     )
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/builtin_fn_macro.rs b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/builtin_fn_macro.rs
index 293868df613..eeaf865338b 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/builtin_fn_macro.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/builtin_fn_macro.rs
@@ -28,6 +28,19 @@ fn test_asm_expand() {
         r#"
 #[rustc_builtin_macro]
 macro_rules! asm {() => {}}
+#[rustc_builtin_macro]
+macro_rules! global_asm {() => {}}
+#[rustc_builtin_macro]
+macro_rules! naked_asm {() => {}}
+
+global_asm! {
+    ""
+}
+
+#[unsafe(naked)]
+extern "C" fn foo() {
+    naked_asm!("");
+}
 
 fn main() {
     let i: u64 = 3;
@@ -45,6 +58,17 @@ fn main() {
         expect![[r##"
 #[rustc_builtin_macro]
 macro_rules! asm {() => {}}
+#[rustc_builtin_macro]
+macro_rules! global_asm {() => {}}
+#[rustc_builtin_macro]
+macro_rules! naked_asm {() => {}}
+
+builtin #global_asm ("")
+
+#[unsafe(naked)]
+extern "C" fn foo() {
+    builtin #naked_asm ("");
+}
 
 fn main() {
     let i: u64 = 3;
@@ -526,3 +550,51 @@ fn main() { "\"hello\""; }
 "##]],
     );
 }
+
+#[test]
+fn cfg_select() {
+    check(
+        r#"
+#[rustc_builtin_macro]
+pub macro cfg_select($($tt:tt)*) {}
+
+cfg_select! {
+    false => { fn false_1() {} }
+    any(false, true) => { fn true_1() {} }
+}
+
+cfg_select! {
+    false => { fn false_2() {} }
+    _ => { fn true_2() {} }
+}
+
+cfg_select! {
+    false => { fn false_3() {} }
+}
+
+cfg_select! {
+    false
+}
+
+cfg_select! {
+    false =>
+}
+
+    "#,
+        expect![[r#"
+#[rustc_builtin_macro]
+pub macro cfg_select($($tt:tt)*) {}
+
+fn true_1() {}
+
+fn true_2() {}
+
+/* error: none of the predicates in this `cfg_select` evaluated to true */
+
+/* error: expected `=>` after cfg expression */
+
+/* error: expected a token tree after `=>` */
+
+    "#]],
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mbe.rs b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mbe.rs
index c6d901ec93b..c489c1f7c1d 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mbe.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mbe.rs
@@ -35,9 +35,9 @@ macro_rules! f {
     };
 }
 
-struct#0:MacroRules[8C8E, 0]@58..64#14336# MyTraitMap2#0:MacroCall[D499, 0]@31..42#ROOT2024# {#0:MacroRules[8C8E, 0]@72..73#14336#
-    map#0:MacroRules[8C8E, 0]@86..89#14336#:#0:MacroRules[8C8E, 0]@89..90#14336# #0:MacroRules[8C8E, 0]@89..90#14336#::#0:MacroRules[8C8E, 0]@91..93#14336#std#0:MacroRules[8C8E, 0]@93..96#14336#::#0:MacroRules[8C8E, 0]@96..98#14336#collections#0:MacroRules[8C8E, 0]@98..109#14336#::#0:MacroRules[8C8E, 0]@109..111#14336#HashSet#0:MacroRules[8C8E, 0]@111..118#14336#<#0:MacroRules[8C8E, 0]@118..119#14336#(#0:MacroRules[8C8E, 0]@119..120#14336#)#0:MacroRules[8C8E, 0]@120..121#14336#>#0:MacroRules[8C8E, 0]@121..122#14336#,#0:MacroRules[8C8E, 0]@122..123#14336#
-}#0:MacroRules[8C8E, 0]@132..133#14336#
+struct#0:MacroRules[BE8F, 0]@58..64#14336# MyTraitMap2#0:MacroCall[BE8F, 0]@31..42#ROOT2024# {#0:MacroRules[BE8F, 0]@72..73#14336#
+    map#0:MacroRules[BE8F, 0]@86..89#14336#:#0:MacroRules[BE8F, 0]@89..90#14336# #0:MacroRules[BE8F, 0]@89..90#14336#::#0:MacroRules[BE8F, 0]@91..93#14336#std#0:MacroRules[BE8F, 0]@93..96#14336#::#0:MacroRules[BE8F, 0]@96..98#14336#collections#0:MacroRules[BE8F, 0]@98..109#14336#::#0:MacroRules[BE8F, 0]@109..111#14336#HashSet#0:MacroRules[BE8F, 0]@111..118#14336#<#0:MacroRules[BE8F, 0]@118..119#14336#(#0:MacroRules[BE8F, 0]@119..120#14336#)#0:MacroRules[BE8F, 0]@120..121#14336#>#0:MacroRules[BE8F, 0]@121..122#14336#,#0:MacroRules[BE8F, 0]@122..123#14336#
+}#0:MacroRules[BE8F, 0]@132..133#14336#
 "#]],
     );
 }
@@ -75,12 +75,12 @@ macro_rules! f {
     };
 }
 
-fn#0:MacroCall[D499, 0]@30..32#ROOT2024# main#0:MacroCall[D499, 0]@33..37#ROOT2024#(#0:MacroCall[D499, 0]@37..38#ROOT2024#)#0:MacroCall[D499, 0]@38..39#ROOT2024# {#0:MacroCall[D499, 0]@40..41#ROOT2024#
-    1#0:MacroCall[D499, 0]@50..51#ROOT2024#;#0:MacroCall[D499, 0]@51..52#ROOT2024#
-    1.0#0:MacroCall[D499, 0]@61..64#ROOT2024#;#0:MacroCall[D499, 0]@64..65#ROOT2024#
-    (#0:MacroCall[D499, 0]@74..75#ROOT2024#(#0:MacroCall[D499, 0]@75..76#ROOT2024#1#0:MacroCall[D499, 0]@76..77#ROOT2024#,#0:MacroCall[D499, 0]@77..78#ROOT2024# )#0:MacroCall[D499, 0]@78..79#ROOT2024#,#0:MacroCall[D499, 0]@79..80#ROOT2024# )#0:MacroCall[D499, 0]@80..81#ROOT2024#.#0:MacroCall[D499, 0]@81..82#ROOT2024#0#0:MacroCall[D499, 0]@82..85#ROOT2024#.#0:MacroCall[D499, 0]@82..85#ROOT2024#0#0:MacroCall[D499, 0]@82..85#ROOT2024#;#0:MacroCall[D499, 0]@85..86#ROOT2024#
-    let#0:MacroCall[D499, 0]@95..98#ROOT2024# x#0:MacroCall[D499, 0]@99..100#ROOT2024# =#0:MacroCall[D499, 0]@101..102#ROOT2024# 1#0:MacroCall[D499, 0]@103..104#ROOT2024#;#0:MacroCall[D499, 0]@104..105#ROOT2024#
-}#0:MacroCall[D499, 0]@110..111#ROOT2024#
+fn#0:MacroCall[BE8F, 0]@30..32#ROOT2024# main#0:MacroCall[BE8F, 0]@33..37#ROOT2024#(#0:MacroCall[BE8F, 0]@37..38#ROOT2024#)#0:MacroCall[BE8F, 0]@38..39#ROOT2024# {#0:MacroCall[BE8F, 0]@40..41#ROOT2024#
+    1#0:MacroCall[BE8F, 0]@50..51#ROOT2024#;#0:MacroCall[BE8F, 0]@51..52#ROOT2024#
+    1.0#0:MacroCall[BE8F, 0]@61..64#ROOT2024#;#0:MacroCall[BE8F, 0]@64..65#ROOT2024#
+    (#0:MacroCall[BE8F, 0]@74..75#ROOT2024#(#0:MacroCall[BE8F, 0]@75..76#ROOT2024#1#0:MacroCall[BE8F, 0]@76..77#ROOT2024#,#0:MacroCall[BE8F, 0]@77..78#ROOT2024# )#0:MacroCall[BE8F, 0]@78..79#ROOT2024#,#0:MacroCall[BE8F, 0]@79..80#ROOT2024# )#0:MacroCall[BE8F, 0]@80..81#ROOT2024#.#0:MacroCall[BE8F, 0]@81..82#ROOT2024#0#0:MacroCall[BE8F, 0]@82..85#ROOT2024#.#0:MacroCall[BE8F, 0]@82..85#ROOT2024#0#0:MacroCall[BE8F, 0]@82..85#ROOT2024#;#0:MacroCall[BE8F, 0]@85..86#ROOT2024#
+    let#0:MacroCall[BE8F, 0]@95..98#ROOT2024# x#0:MacroCall[BE8F, 0]@99..100#ROOT2024# =#0:MacroCall[BE8F, 0]@101..102#ROOT2024# 1#0:MacroCall[BE8F, 0]@103..104#ROOT2024#;#0:MacroCall[BE8F, 0]@104..105#ROOT2024#
+}#0:MacroCall[BE8F, 0]@110..111#ROOT2024#
 
 
 "#]],
@@ -171,7 +171,7 @@ fn main(foo: ()) {
     }
 
     fn main(foo: ()) {
-        /* error: unresolved macro unresolved */"helloworld!"#0:Fn[B9C7, 0]@236..321#ROOT2024#;
+        /* error: unresolved macro unresolved */"helloworld!"#0:Fn[15AE, 0]@236..321#ROOT2024#;
     }
 }
 
@@ -197,7 +197,7 @@ macro_rules! mk_struct {
 #[macro_use]
 mod foo;
 
-struct#1:MacroRules[E572, 0]@59..65#14336# Foo#0:MacroCall[BDD3, 0]@32..35#ROOT2024#(#1:MacroRules[E572, 0]@70..71#14336#u32#0:MacroCall[BDD3, 0]@41..44#ROOT2024#)#1:MacroRules[E572, 0]@74..75#14336#;#1:MacroRules[E572, 0]@75..76#14336#
+struct#1:MacroRules[DB0C, 0]@59..65#14336# Foo#0:MacroCall[DB0C, 0]@32..35#ROOT2024#(#1:MacroRules[DB0C, 0]@70..71#14336#u32#0:MacroCall[DB0C, 0]@41..44#ROOT2024#)#1:MacroRules[DB0C, 0]@74..75#14336#;#1:MacroRules[DB0C, 0]@75..76#14336#
 "#]],
     );
 }
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mod.rs b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mod.rs
index 1c69b37f164..5e95b061399 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mod.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/mod.rs
@@ -20,13 +20,14 @@ use base_db::RootQueryDb;
 use expect_test::Expect;
 use hir_expand::{
     AstId, InFile, MacroCallId, MacroCallKind, MacroKind,
+    builtin::quote::quote,
     db::ExpandDatabase,
     proc_macro::{ProcMacro, ProcMacroExpander, ProcMacroExpansionError, ProcMacroKind},
     span_map::SpanMapRef,
 };
-use intern::Symbol;
+use intern::{Symbol, sym};
 use itertools::Itertools;
-use span::{Edition, Span};
+use span::{Edition, ROOT_ERASED_FILE_AST_ID, Span, SpanAnchor, SyntaxContext};
 use stdx::{format_to, format_to_acc};
 use syntax::{
     AstNode, AstPtr,
@@ -34,7 +35,9 @@ use syntax::{
     SyntaxNode, T,
     ast::{self, edit::IndentLevel},
 };
+use syntax_bridge::token_tree_to_syntax_node;
 use test_fixture::WithFixture;
+use tt::{TextRange, TextSize};
 
 use crate::{
     AdtId, Lookup, ModuleDefId,
@@ -386,3 +389,38 @@ impl ProcMacroExpander for IdentityWhenValidProcMacroExpander {
         other.type_id() == TypeId::of::<Self>()
     }
 }
+
+#[test]
+fn regression_20171() {
+    // This really isn't the appropriate place to put this test, but it's convenient with access to `quote!`.
+    let span = Span {
+        range: TextRange::empty(TextSize::new(0)),
+        anchor: SpanAnchor {
+            file_id: span::EditionedFileId::current_edition(span::FileId::from_raw(0)),
+            ast_id: ROOT_ERASED_FILE_AST_ID,
+        },
+        ctx: SyntaxContext::root(Edition::CURRENT),
+    };
+    let close_brace = tt::Punct { char: '}', spacing: tt::Spacing::Alone, span };
+    let dotdot1 = tt::Punct { char: '.', spacing: tt::Spacing::Joint, span };
+    let dotdot2 = tt::Punct { char: '.', spacing: tt::Spacing::Alone, span };
+    let dollar_crate = sym::dollar_crate;
+    let tt = quote! {
+            span => {
+        if !((matches!(
+            drive_parser(&mut parser, data, false),
+            Err(TarParserError::CorruptField {
+                field: CorruptFieldContext::PaxKvLength,
+                error: GeneralParseError::ParseInt(ParseIntError { #dotdot1 #dotdot2 })
+            })
+        #close_brace  ))) {
+        #dollar_crate::panic::panic_2021!();
+    }}
+        };
+    token_tree_to_syntax_node(
+        &tt,
+        syntax_bridge::TopEntryPoint::MacroStmts,
+        &mut |_| Edition::CURRENT,
+        Edition::CURRENT,
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs
index d5ae6f8d885..6952a9da101 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/macro_expansion_tests/proc_macros.rs
@@ -181,9 +181,9 @@ fn foo(&self) {
     self.0. 1;
 }
 
-fn#0:Fn[4D85, 0]@45..47#ROOT2024# foo#0:Fn[4D85, 0]@48..51#ROOT2024#(#0:Fn[4D85, 0]@51..52#ROOT2024#&#0:Fn[4D85, 0]@52..53#ROOT2024#self#0:Fn[4D85, 0]@53..57#ROOT2024# )#0:Fn[4D85, 0]@57..58#ROOT2024# {#0:Fn[4D85, 0]@59..60#ROOT2024#
-    self#0:Fn[4D85, 0]@65..69#ROOT2024# .#0:Fn[4D85, 0]@69..70#ROOT2024#0#0:Fn[4D85, 0]@70..71#ROOT2024#.#0:Fn[4D85, 0]@71..72#ROOT2024#1#0:Fn[4D85, 0]@73..74#ROOT2024#;#0:Fn[4D85, 0]@74..75#ROOT2024#
-}#0:Fn[4D85, 0]@76..77#ROOT2024#"#]],
+fn#0:Fn[8A31, 0]@45..47#ROOT2024# foo#0:Fn[8A31, 0]@48..51#ROOT2024#(#0:Fn[8A31, 0]@51..52#ROOT2024#&#0:Fn[8A31, 0]@52..53#ROOT2024#self#0:Fn[8A31, 0]@53..57#ROOT2024# )#0:Fn[8A31, 0]@57..58#ROOT2024# {#0:Fn[8A31, 0]@59..60#ROOT2024#
+    self#0:Fn[8A31, 0]@65..69#ROOT2024# .#0:Fn[8A31, 0]@69..70#ROOT2024#0#0:Fn[8A31, 0]@70..71#ROOT2024#.#0:Fn[8A31, 0]@71..72#ROOT2024#1#0:Fn[8A31, 0]@73..74#ROOT2024#;#0:Fn[8A31, 0]@74..75#ROOT2024#
+}#0:Fn[8A31, 0]@76..77#ROOT2024#"#]],
     );
 }
 
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/nameres.rs b/src/tools/rust-analyzer/crates/hir-def/src/nameres.rs
index 0837308d5b6..5030585147d 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/nameres.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/nameres.rs
@@ -373,19 +373,14 @@ pub fn crate_def_map(db: &dyn DefDatabase, crate_id: Crate) -> &DefMap {
     crate_local_def_map(db, crate_id).def_map(db)
 }
 
-#[allow(unused_lifetimes)]
-mod __ {
-    use super::*;
-    #[salsa_macros::tracked]
-    pub(crate) struct DefMapPair<'db> {
-        #[tracked]
-        #[returns(ref)]
-        pub(crate) def_map: DefMap,
-        #[returns(ref)]
-        pub(crate) local: LocalDefMap,
-    }
+#[salsa_macros::tracked]
+pub(crate) struct DefMapPair<'db> {
+    #[tracked]
+    #[returns(ref)]
+    pub(crate) def_map: DefMap,
+    #[returns(ref)]
+    pub(crate) local: LocalDefMap,
 }
-pub(crate) use __::DefMapPair;
 
 #[salsa_macros::tracked(returns(ref))]
 pub(crate) fn crate_local_def_map(db: &dyn DefDatabase, crate_id: Crate) -> DefMapPair<'_> {
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/resolver.rs b/src/tools/rust-analyzer/crates/hir-def/src/resolver.rs
index 6f321980af4..316ad5dae69 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/resolver.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/resolver.rs
@@ -1052,17 +1052,6 @@ impl<'db> Scope<'db> {
     }
 }
 
-pub fn resolver_for_expr(
-    db: &dyn DefDatabase,
-    owner: DefWithBodyId,
-    expr_id: ExprId,
-) -> Resolver<'_> {
-    let r = owner.resolver(db);
-    let scopes = db.expr_scopes(owner);
-    let scope_id = scopes.scope_for(expr_id);
-    resolver_for_scope_(db, scopes, scope_id, r, owner)
-}
-
 pub fn resolver_for_scope(
     db: &dyn DefDatabase,
     owner: DefWithBodyId,
diff --git a/src/tools/rust-analyzer/crates/hir-def/src/signatures.rs b/src/tools/rust-analyzer/crates/hir-def/src/signatures.rs
index 1958eb6c6a1..92e610b36ac 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/signatures.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/signatures.rs
@@ -779,14 +779,10 @@ impl VariantFields {
                 Arc::new(VariantFields { fields, store: Arc::new(store), shape }),
                 Arc::new(source_map),
             ),
-            None => (
-                Arc::new(VariantFields {
-                    fields: Arena::default(),
-                    store: ExpressionStore::empty_singleton(),
-                    shape,
-                }),
-                ExpressionStoreSourceMap::empty_singleton(),
-            ),
+            None => {
+                let (store, source_map) = ExpressionStore::empty_singleton();
+                (Arc::new(VariantFields { fields: Arena::default(), store, shape }), source_map)
+            }
         }
     }
 
@@ -878,7 +874,7 @@ fn lower_fields<Field: ast::HasAttrs + ast::HasVisibility>(
                 idx += 1;
             }
             Err(cfg) => {
-                col.source_map.diagnostics.push(
+                col.store.diagnostics.push(
                     crate::expr_store::ExpressionStoreDiagnostics::InactiveCode {
                         node: InFile::new(fields.file_id, SyntaxNodePtr::new(field.syntax())),
                         cfg,
@@ -891,9 +887,9 @@ fn lower_fields<Field: ast::HasAttrs + ast::HasVisibility>(
     if !has_fields {
         return None;
     }
-    let store = col.store.finish();
+    let (store, source_map) = col.store.finish();
     arena.shrink_to_fit();
-    Some((arena, store, col.source_map))
+    Some((arena, store, source_map))
 }
 
 #[derive(Debug, PartialEq, Eq)]
@@ -980,7 +976,7 @@ impl EnumVariants {
             if !matches!(variant.shape, FieldsShape::Unit) {
                 let body = db.body(v.into());
                 // A variant with explicit discriminant
-                if body.exprs[body.body_expr] != crate::hir::Expr::Missing {
+                if !matches!(body[body.body_expr], crate::hir::Expr::Missing) {
                     return false;
                 }
             }
diff --git a/src/tools/rust-analyzer/crates/hir-expand/src/builtin/fn_macro.rs b/src/tools/rust-analyzer/crates/hir-expand/src/builtin/fn_macro.rs
index 800b40a9e7e..4a9af01091f 100644
--- a/src/tools/rust-analyzer/crates/hir-expand/src/builtin/fn_macro.rs
+++ b/src/tools/rust-analyzer/crates/hir-expand/src/builtin/fn_macro.rs
@@ -125,8 +125,9 @@ register_builtin! {
     (assert, Assert) => assert_expand,
     (stringify, Stringify) => stringify_expand,
     (asm, Asm) => asm_expand,
-    (global_asm, GlobalAsm) => asm_expand,
-    (naked_asm, NakedAsm) => asm_expand,
+    (global_asm, GlobalAsm) => global_asm_expand,
+    (naked_asm, NakedAsm) => naked_asm_expand,
+    (cfg_select, CfgSelect) => cfg_select_expand,
     (cfg, Cfg) => cfg_expand,
     (core_panic, CorePanic) => panic_expand,
     (std_panic, StdPanic) => panic_expand,
@@ -325,6 +326,101 @@ fn asm_expand(
     ExpandResult::ok(expanded)
 }
 
+fn global_asm_expand(
+    _db: &dyn ExpandDatabase,
+    _id: MacroCallId,
+    tt: &tt::TopSubtree,
+    span: Span,
+) -> ExpandResult<tt::TopSubtree> {
+    let mut tt = tt.clone();
+    tt.top_subtree_delimiter_mut().kind = tt::DelimiterKind::Parenthesis;
+    let pound = mk_pound(span);
+    let expanded = quote! {span =>
+        builtin #pound global_asm #tt
+    };
+    ExpandResult::ok(expanded)
+}
+
+fn naked_asm_expand(
+    _db: &dyn ExpandDatabase,
+    _id: MacroCallId,
+    tt: &tt::TopSubtree,
+    span: Span,
+) -> ExpandResult<tt::TopSubtree> {
+    let mut tt = tt.clone();
+    tt.top_subtree_delimiter_mut().kind = tt::DelimiterKind::Parenthesis;
+    let pound = mk_pound(span);
+    let expanded = quote! {span =>
+        builtin #pound naked_asm #tt
+    };
+    ExpandResult::ok(expanded)
+}
+
+fn cfg_select_expand(
+    db: &dyn ExpandDatabase,
+    id: MacroCallId,
+    tt: &tt::TopSubtree,
+    span: Span,
+) -> ExpandResult<tt::TopSubtree> {
+    let loc = db.lookup_intern_macro_call(id);
+    let cfg_options = loc.krate.cfg_options(db);
+
+    let mut iter = tt.iter();
+    let mut expand_to = None;
+    while let Some(next) = iter.peek() {
+        let active = if let tt::TtElement::Leaf(tt::Leaf::Ident(ident)) = next
+            && ident.sym == sym::underscore
+        {
+            iter.next();
+            true
+        } else {
+            cfg_options.check(&CfgExpr::parse_from_iter(&mut iter)) != Some(false)
+        };
+        match iter.expect_glued_punct() {
+            Ok(it) if it.len() == 2 && it[0].char == '=' && it[1].char == '>' => {}
+            _ => {
+                let err_span = iter.peek().map(|it| it.first_span()).unwrap_or(span);
+                return ExpandResult::new(
+                    tt::TopSubtree::empty(tt::DelimSpan::from_single(span)),
+                    ExpandError::other(err_span, "expected `=>` after cfg expression"),
+                );
+            }
+        }
+        let expand_to_if_active = match iter.next() {
+            Some(tt::TtElement::Subtree(_, tt)) => tt.remaining(),
+            _ => {
+                let err_span = iter.peek().map(|it| it.first_span()).unwrap_or(span);
+                return ExpandResult::new(
+                    tt::TopSubtree::empty(tt::DelimSpan::from_single(span)),
+                    ExpandError::other(err_span, "expected a token tree after `=>`"),
+                );
+            }
+        };
+
+        if expand_to.is_none() && active {
+            expand_to = Some(expand_to_if_active);
+        }
+    }
+    match expand_to {
+        Some(expand_to) => {
+            let mut builder = tt::TopSubtreeBuilder::new(tt::Delimiter {
+                kind: tt::DelimiterKind::Invisible,
+                open: span,
+                close: span,
+            });
+            builder.extend_with_tt(expand_to);
+            ExpandResult::ok(builder.build())
+        }
+        None => ExpandResult::new(
+            tt::TopSubtree::empty(tt::DelimSpan::from_single(span)),
+            ExpandError::other(
+                span,
+                "none of the predicates in this `cfg_select` evaluated to true",
+            ),
+        ),
+    }
+}
+
 fn cfg_expand(
     db: &dyn ExpandDatabase,
     id: MacroCallId,
diff --git a/src/tools/rust-analyzer/crates/hir-expand/src/builtin/quote.rs b/src/tools/rust-analyzer/crates/hir-expand/src/builtin/quote.rs
index d5874f829ba..70c38d4d7c7 100644
--- a/src/tools/rust-analyzer/crates/hir-expand/src/builtin/quote.rs
+++ b/src/tools/rust-analyzer/crates/hir-expand/src/builtin/quote.rs
@@ -129,7 +129,7 @@ macro_rules! quote {
         }
     }
 }
-pub(super) use quote;
+pub use quote;
 
 pub trait ToTokenTree {
     fn to_tokens(self, span: Span, builder: &mut TopSubtreeBuilder);
diff --git a/src/tools/rust-analyzer/crates/hir-expand/src/name.rs b/src/tools/rust-analyzer/crates/hir-expand/src/name.rs
index 679f61112ad..217d991d110 100644
--- a/src/tools/rust-analyzer/crates/hir-expand/src/name.rs
+++ b/src/tools/rust-analyzer/crates/hir-expand/src/name.rs
@@ -179,10 +179,9 @@ impl Name {
         self.symbol.as_str()
     }
 
-    #[inline]
     pub fn display<'a>(
         &'a self,
-        db: &dyn salsa::Database,
+        db: &dyn crate::db::ExpandDatabase,
         edition: Edition,
     ) -> impl fmt::Display + 'a {
         _ = db;
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/consteval.rs b/src/tools/rust-analyzer/crates/hir-ty/src/consteval.rs
index 24530a5f67c..14b9cd203f6 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/consteval.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/consteval.rs
@@ -281,7 +281,7 @@ pub(crate) fn const_eval_discriminant_variant(
     let def = variant_id.into();
     let body = db.body(def);
     let loc = variant_id.lookup(db);
-    if body.exprs[body.body_expr] == Expr::Missing {
+    if matches!(body[body.body_expr], Expr::Missing) {
         let prev_idx = loc.index.checked_sub(1);
         let value = match prev_idx {
             Some(prev_idx) => {
@@ -334,7 +334,7 @@ pub(crate) fn eval_to_const(
         // Type checking clousres need an isolated body (See the above FIXME). Bail out early to prevent panic.
         return unknown_const(infer[expr].clone());
     }
-    if let Expr::Path(p) = &ctx.body.exprs[expr] {
+    if let Expr::Path(p) = &ctx.body[expr] {
         let resolver = &ctx.resolver;
         if let Some(c) =
             path_to_const(db, resolver, p, mode, || ctx.generics(), debruijn, infer[expr].clone())
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/db.rs b/src/tools/rust-analyzer/crates/hir-ty/src/db.rs
index 5d3be07f3db..b3d46845c44 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/db.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/db.rs
@@ -273,8 +273,9 @@ pub trait HirDatabase: DefDatabase + std::fmt::Debug {
 
     #[salsa::invoke(crate::variance::variances_of)]
     #[salsa::cycle(
-        cycle_fn = crate::variance::variances_of_cycle_fn,
-        cycle_initial = crate::variance::variances_of_cycle_initial,
+        // cycle_fn = crate::variance::variances_of_cycle_fn,
+        // cycle_initial = crate::variance::variances_of_cycle_initial,
+        cycle_result = crate::variance::variances_of_cycle_initial,
     )]
     fn variances_of(&self, def: GenericDefId) -> Option<Arc<[crate::variance::Variance]>>;
 
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/decl_check.rs b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/decl_check.rs
index 9c0f8f40080..40fe3073cf2 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/decl_check.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/decl_check.rs
@@ -226,11 +226,10 @@ impl<'a> DeclValidator<'a> {
         let body = self.db.body(func.into());
         let edition = self.edition(func);
         let mut pats_replacements = body
-            .pats
-            .iter()
+            .pats()
             .filter_map(|(pat_id, pat)| match pat {
                 Pat::Bind { id, .. } => {
-                    let bind_name = &body.bindings[*id].name;
+                    let bind_name = &body[*id].name;
                     let mut suggested_text = to_lower_snake_case(bind_name.as_str())?;
                     if is_raw_identifier(&suggested_text, edition) {
                         suggested_text.insert_str(0, "r#");
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/expr.rs b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/expr.rs
index 5d56957be6d..5ae6bf6dffd 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/expr.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/expr.rs
@@ -101,7 +101,7 @@ impl ExprValidator {
             self.check_for_trailing_return(body.body_expr, &body);
         }
 
-        for (id, expr) in body.exprs.iter() {
+        for (id, expr) in body.exprs() {
             if let Some((variant, missed_fields, true)) =
                 record_literal_missing_fields(db, &self.infer, id, expr)
             {
@@ -132,7 +132,7 @@ impl ExprValidator {
             }
         }
 
-        for (id, pat) in body.pats.iter() {
+        for (id, pat) in body.pats() {
             if let Some((variant, missed_fields, true)) =
                 record_pattern_missing_fields(db, &self.infer, id, pat)
             {
@@ -389,7 +389,7 @@ impl ExprValidator {
         if !self.validate_lints {
             return;
         }
-        match &body.exprs[body_expr] {
+        match &body[body_expr] {
             Expr::Block { statements, tail, .. } => {
                 let last_stmt = tail.or_else(|| match statements.last()? {
                     Statement::Expr { expr, .. } => Some(*expr),
@@ -428,7 +428,7 @@ impl ExprValidator {
             if else_branch.is_none() {
                 return;
             }
-            if let Expr::Block { statements, tail, .. } = &self.body.exprs[*then_branch] {
+            if let Expr::Block { statements, tail, .. } = &self.body[*then_branch] {
                 let last_then_expr = tail.or_else(|| match statements.last()? {
                     Statement::Expr { expr, .. } => Some(*expr),
                     _ => None,
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check.rs b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check.rs
index c3ab5aff3db..ca132fbdc45 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check.rs
@@ -150,7 +150,7 @@ impl<'a> PatCtxt<'a> {
             hir_def::hir::Pat::Bind { id, subpat, .. } => {
                 let bm = self.infer.binding_modes[pat];
                 ty = &self.infer[id];
-                let name = &self.body.bindings[id].name;
+                let name = &self.body[id].name;
                 match (bm, ty.kind(Interner)) {
                     (BindingMode::Ref(_), TyKind::Ref(.., rty)) => ty = rty,
                     (BindingMode::Ref(_), _) => {
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check/pat_analysis.rs b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check/pat_analysis.rs
index 22b7f5ac9fd..56fd12e1f2b 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check/pat_analysis.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check/pat_analysis.rs
@@ -489,6 +489,14 @@ impl PatCx for MatchCheckCtx<'_> {
     fn complexity_exceeded(&self) -> Result<(), Self::Error> {
         Err(())
     }
+
+    fn report_mixed_deref_pat_ctors(
+        &self,
+        _deref_pat: &DeconstructedPat<'_>,
+        _normal_pat: &DeconstructedPat<'_>,
+    ) {
+        // FIXME(deref_patterns): This could report an error comparable to the one in rustc.
+    }
 }
 
 impl fmt::Debug for MatchCheckCtx<'_> {
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/unsafe_check.rs b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/unsafe_check.rs
index 20cf3c78115..f6ad3c7aae2 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/unsafe_check.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/unsafe_check.rs
@@ -7,7 +7,7 @@ use either::Either;
 use hir_def::{
     AdtId, DefWithBodyId, FieldId, FunctionId, VariantId,
     expr_store::{Body, path::Path},
-    hir::{AsmOperand, Expr, ExprId, ExprOrPatId, Pat, PatId, Statement, UnaryOp},
+    hir::{AsmOperand, Expr, ExprId, ExprOrPatId, InlineAsmKind, Pat, PatId, Statement, UnaryOp},
     resolver::{HasResolver, ResolveValueResult, Resolver, ValueNs},
     signatures::StaticFlags,
     type_ref::Rawness,
@@ -217,7 +217,7 @@ impl<'db> UnsafeVisitor<'db> {
     }
 
     fn walk_pat(&mut self, current: PatId) {
-        let pat = &self.body.pats[current];
+        let pat = &self.body[current];
 
         if self.inside_union_destructure {
             match pat {
@@ -264,7 +264,7 @@ impl<'db> UnsafeVisitor<'db> {
     }
 
     fn walk_expr(&mut self, current: ExprId) {
-        let expr = &self.body.exprs[current];
+        let expr = &self.body[current];
         let inside_assignment = mem::replace(&mut self.inside_assignment, false);
         match expr {
             &Expr::Call { callee, .. } => {
@@ -284,7 +284,7 @@ impl<'db> UnsafeVisitor<'db> {
                 self.resolver.reset_to_guard(guard);
             }
             Expr::Ref { expr, rawness: Rawness::RawPtr, mutability: _ } => {
-                match self.body.exprs[*expr] {
+                match self.body[*expr] {
                     // Do not report unsafe for `addr_of[_mut]!(EXTERN_OR_MUT_STATIC)`,
                     // see https://github.com/rust-lang/rust/pull/125834.
                     Expr::Path(_) => return,
@@ -315,7 +315,12 @@ impl<'db> UnsafeVisitor<'db> {
                 self.inside_assignment = old_inside_assignment;
             }
             Expr::InlineAsm(asm) => {
-                self.on_unsafe_op(current.into(), UnsafetyReason::InlineAsm);
+                if asm.kind == InlineAsmKind::Asm {
+                    // `naked_asm!()` requires `unsafe` on the attribute (`#[unsafe(naked)]`),
+                    // and `global_asm!()` doesn't require it at all.
+                    self.on_unsafe_op(current.into(), UnsafetyReason::InlineAsm);
+                }
+
                 asm.operands.iter().for_each(|(_, op)| match op {
                     AsmOperand::In { expr, .. }
                     | AsmOperand::Out { expr: Some(expr), .. }
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/display.rs b/src/tools/rust-analyzer/crates/hir-ty/src/display.rs
index 810fe76f231..b3760e3a382 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/display.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/display.rs
@@ -795,6 +795,14 @@ fn render_const_scalar(
                 let Some(bytes) = memory_map.get(addr, size_one * count) else {
                     return f.write_str("<ref-data-not-available>");
                 };
+                let expected_len = count * size_one;
+                if bytes.len() < expected_len {
+                    never!(
+                        "Memory map size is too small. Expected {expected_len}, got {}",
+                        bytes.len(),
+                    );
+                    return f.write_str("<layout-error>");
+                }
                 f.write_str("&[")?;
                 let mut first = true;
                 for i in 0..count {
@@ -2328,6 +2336,7 @@ impl HirDisplayWithExpressionStore for TypeBound {
                 store[*path].hir_fmt(f, store)
             }
             TypeBound::Use(args) => {
+                write!(f, "use<")?;
                 let edition = f.edition();
                 let last = args.len().saturating_sub(1);
                 for (idx, arg) in args.iter().enumerate() {
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer/mutability.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer/mutability.rs
index d2eaf212365..3f7eba9dd18 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer/mutability.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer/mutability.rs
@@ -273,7 +273,7 @@ impl InferenceContext<'_> {
     fn pat_bound_mutability(&self, pat: PatId) -> Mutability {
         let mut r = Mutability::Not;
         self.body.walk_bindings_in_pat(pat, |b| {
-            if self.body.bindings[b].mode == BindingAnnotation::RefMut {
+            if self.body[b].mode == BindingAnnotation::RefMut {
                 r = Mutability::Mut;
             }
         });
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/infer/pat.rs b/src/tools/rust-analyzer/crates/hir-ty/src/infer/pat.rs
index 99d3b5c7a84..18288b718f7 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/infer/pat.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/infer/pat.rs
@@ -459,7 +459,7 @@ impl InferenceContext<'_> {
         expected: &Ty,
         decl: Option<DeclContext>,
     ) -> Ty {
-        let Binding { mode, .. } = self.body.bindings[binding];
+        let Binding { mode, .. } = self.body[binding];
         let mode = if mode == BindingAnnotation::Unannotated {
             default_bm
         } else {
@@ -639,7 +639,7 @@ impl InferenceContext<'_> {
 pub(super) fn contains_explicit_ref_binding(body: &Body, pat_id: PatId) -> bool {
     let mut res = false;
     body.walk_pats(pat_id, &mut |pat| {
-        res |= matches!(body[pat], Pat::Bind { id, .. } if body.bindings[id].mode == BindingAnnotation::Ref);
+        res |= matches!(body[pat], Pat::Bind { id, .. } if body[id].mode == BindingAnnotation::Ref);
     });
     res
 }
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/layout/target.rs b/src/tools/rust-analyzer/crates/hir-ty/src/layout/target.rs
index 88c33ecccad..82d0ed4f194 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/layout/target.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/layout/target.rs
@@ -2,7 +2,7 @@
 
 use base_db::Crate;
 use hir_def::layout::TargetDataLayout;
-use rustc_abi::{AlignFromBytesError, TargetDataLayoutErrors, AddressSpace};
+use rustc_abi::{AddressSpace, AlignFromBytesError, TargetDataLayoutErrors};
 use triomphe::Arc;
 
 use crate::db::HirDatabase;
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/layout/tests.rs b/src/tools/rust-analyzer/crates/hir-ty/src/layout/tests.rs
index cc7d74f4fb0..b3bc226ec93 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/layout/tests.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/layout/tests.rs
@@ -119,8 +119,7 @@ fn eval_expr(
         .unwrap();
     let hir_body = db.body(function_id.into());
     let b = hir_body
-        .bindings
-        .iter()
+        .bindings()
         .find(|x| x.1.name.display_no_db(file_id.edition(&db)).to_smolstr() == "goal")
         .unwrap()
         .0;
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/lower/path.rs b/src/tools/rust-analyzer/crates/hir-ty/src/lower/path.rs
index 06686b6a164..5c06234fa07 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/lower/path.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/lower/path.rs
@@ -1018,8 +1018,12 @@ fn check_generic_args_len(
     }
 
     let lifetime_args_len = def_generics.len_lifetimes_self();
-    if provided_lifetimes_count == 0 && lifetime_args_len > 0 && !lowering_assoc_type_generics {
-        // In generic associated types, we never allow inferring the lifetimes.
+    if provided_lifetimes_count == 0
+        && lifetime_args_len > 0
+        && (!lowering_assoc_type_generics || infer_args)
+    {
+        // In generic associated types, we never allow inferring the lifetimes, but only in type context, that is
+        // when `infer_args == false`. In expression/pattern context we always allow inferring them, even for GATs.
         match lifetime_elision {
             &LifetimeElisionKind::AnonymousCreateParameter { report_in_path } => {
                 ctx.report_elided_lifetimes_in_path(def, lifetime_args_len as u32, report_in_path);
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/mir.rs b/src/tools/rust-analyzer/crates/hir-ty/src/mir.rs
index bf80ed7967a..482b420279c 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/mir.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/mir.rs
@@ -1212,10 +1212,9 @@ impl MirSpan {
         match *self {
             MirSpan::ExprId(expr) => matches!(body[expr], Expr::Ref { .. }),
             // FIXME: Figure out if this is correct wrt. match ergonomics.
-            MirSpan::BindingId(binding) => matches!(
-                body.bindings[binding].mode,
-                BindingAnnotation::Ref | BindingAnnotation::RefMut
-            ),
+            MirSpan::BindingId(binding) => {
+                matches!(body[binding].mode, BindingAnnotation::Ref | BindingAnnotation::RefMut)
+            }
             MirSpan::PatId(_) | MirSpan::SelfParam | MirSpan::Unknown => false,
         }
     }
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/mir/eval.rs b/src/tools/rust-analyzer/crates/hir-ty/src/mir/eval.rs
index 55fada14363..9a97bd6dbe2 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/mir/eval.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/mir/eval.rs
@@ -31,8 +31,8 @@ use syntax::{SyntaxNodePtr, TextRange};
 use triomphe::Arc;
 
 use crate::{
-    CallableDefId, ClosureId, ComplexMemoryMap, Const, ConstData, ConstScalar, FnDefId, Interner,
-    MemoryMap, Substitution, ToChalk, TraitEnvironment, Ty, TyBuilder, TyExt, TyKind,
+    AliasTy, CallableDefId, ClosureId, ComplexMemoryMap, Const, ConstData, ConstScalar, FnDefId,
+    Interner, MemoryMap, Substitution, ToChalk, TraitEnvironment, Ty, TyBuilder, TyExt, TyKind,
     consteval::{ConstEvalError, intern_const_scalar, try_const_usize},
     db::{HirDatabase, InternedClosure},
     display::{ClosureStyle, DisplayTarget, HirDisplay},
@@ -2195,7 +2195,7 @@ impl Evaluator<'_> {
                         }
                     }
                 }
-                chalk_ir::TyKind::Array(inner, len) => {
+                TyKind::Array(inner, len) => {
                     let len = match try_const_usize(this.db, len) {
                         Some(it) => it as usize,
                         None => not_supported!("non evaluatable array len in patching addresses"),
@@ -2213,7 +2213,7 @@ impl Evaluator<'_> {
                         )?;
                     }
                 }
-                chalk_ir::TyKind::Tuple(_, subst) => {
+                TyKind::Tuple(_, subst) => {
                     let layout = this.layout(ty)?;
                     for (id, ty) in subst.iter(Interner).enumerate() {
                         let ty = ty.assert_ty_ref(Interner); // Tuple only has type argument
@@ -2229,7 +2229,7 @@ impl Evaluator<'_> {
                         )?;
                     }
                 }
-                chalk_ir::TyKind::Adt(adt, subst) => match adt.0 {
+                TyKind::Adt(adt, subst) => match adt.0 {
                     AdtId::StructId(s) => {
                         let data = s.fields(this.db);
                         let layout = this.layout(ty)?;
@@ -2280,6 +2280,10 @@ impl Evaluator<'_> {
                     }
                     AdtId::UnionId(_) => (),
                 },
+                TyKind::Alias(AliasTy::Projection(proj)) => {
+                    let ty = this.db.normalize_projection(proj.clone(), this.trait_env.clone());
+                    rec(this, bytes, &ty, locals, mm, stack_depth_limit - 1)?;
+                }
                 _ => (),
             }
             Ok(())
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower.rs b/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower.rs
index 845d6b8eae1..07d81472729 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower.rs
@@ -321,7 +321,7 @@ impl<'ctx> MirLowerCtx<'ctx> {
         current: BasicBlockId,
     ) -> Result<Option<(Operand, BasicBlockId)>> {
         if !self.has_adjustments(expr_id) {
-            if let Expr::Literal(l) = &self.body.exprs[expr_id] {
+            if let Expr::Literal(l) = &self.body[expr_id] {
                 let ty = self.expr_ty_without_adjust(expr_id);
                 return Ok(Some((self.lower_literal_to_operand(ty, l)?, current)));
             }
@@ -411,7 +411,7 @@ impl<'ctx> MirLowerCtx<'ctx> {
         place: Place,
         mut current: BasicBlockId,
     ) -> Result<Option<BasicBlockId>> {
-        match &self.body.exprs[expr_id] {
+        match &self.body[expr_id] {
             Expr::OffsetOf(_) => {
                 not_supported!("builtin#offset_of")
             }
@@ -1374,7 +1374,7 @@ impl<'ctx> MirLowerCtx<'ctx> {
     }
 
     fn lower_literal_or_const_to_operand(&mut self, ty: Ty, loc: &ExprId) -> Result<Operand> {
-        match &self.body.exprs[*loc] {
+        match &self.body[*loc] {
             Expr::Literal(l) => self.lower_literal_to_operand(ty, l),
             Expr::Path(c) => {
                 let owner = self.owner;
@@ -1850,7 +1850,7 @@ impl<'ctx> MirLowerCtx<'ctx> {
             self.drop_scopes.last_mut().unwrap().locals.push(local_id);
             if let Pat::Bind { id, subpat: None } = self.body[it] {
                 if matches!(
-                    self.body.bindings[id].mode,
+                    self.body[id].mode,
                     BindingAnnotation::Unannotated | BindingAnnotation::Mutable
                 ) {
                     self.result.binding_locals.insert(id, local_id);
@@ -1859,7 +1859,7 @@ impl<'ctx> MirLowerCtx<'ctx> {
             local_id
         }));
         // and then rest of bindings
-        for (id, _) in self.body.bindings.iter() {
+        for (id, _) in self.body.bindings() {
             if !pick_binding(id) {
                 continue;
             }
@@ -2126,7 +2126,7 @@ pub fn mir_body_for_closure_query(
         .result
         .binding_locals
         .into_iter()
-        .filter(|it| ctx.body.binding_owners.get(&it.0).copied() == Some(expr))
+        .filter(|it| ctx.body.binding_owner(it.0) == Some(expr))
         .collect();
     if let Some(err) = err {
         return Err(MirLowerError::UnresolvedUpvar(err));
@@ -2191,7 +2191,7 @@ pub fn lower_to_mir(
     // 0 is return local
     ctx.result.locals.alloc(Local { ty: ctx.expr_ty_after_adjustments(root_expr) });
     let binding_picker = |b: BindingId| {
-        let owner = ctx.body.binding_owners.get(&b).copied();
+        let owner = ctx.body.binding_owner(b);
         if root_expr == body.body_expr { owner.is_none() } else { owner == Some(root_expr) }
     };
     // 1 to param_len is for params
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/as_place.rs b/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/as_place.rs
index e7bffead931..e074c2d558e 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/as_place.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/as_place.rs
@@ -133,7 +133,7 @@ impl MirLowerCtx<'_> {
             }
             this.lower_expr_to_some_place_without_adjust(expr_id, current)
         };
-        match &self.body.exprs[expr_id] {
+        match &self.body[expr_id] {
             Expr::Path(p) => {
                 let resolver_guard =
                     self.resolver.update_to_inner_scope(self.db, self.owner, expr_id);
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/pattern_matching.rs b/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/pattern_matching.rs
index 61c0685c48a..3325226b1d3 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/pattern_matching.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/mir/lower/pattern_matching.rs
@@ -130,7 +130,7 @@ impl MirLowerCtx<'_> {
                 .collect::<Vec<_>>()
                 .into(),
         );
-        Ok(match &self.body.pats[pattern] {
+        Ok(match &self.body[pattern] {
             Pat::Missing => return Err(MirLowerError::IncompletePattern),
             Pat::Wild => (current, current_else),
             Pat::Tuple { args, ellipsis } => {
@@ -436,7 +436,7 @@ impl MirLowerCtx<'_> {
                     (next, Some(else_target))
                 }
             },
-            Pat::Lit(l) => match &self.body.exprs[*l] {
+            Pat::Lit(l) => match &self.body[*l] {
                 Expr::Literal(l) => {
                     if mode == MatchingMode::Check {
                         let c = self.lower_literal_to_operand(self.infer[pattern].clone(), l)?;
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/mir/pretty.rs b/src/tools/rust-analyzer/crates/hir-ty/src/mir/pretty.rs
index 78a69cf4509..aad54f88438 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/mir/pretty.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/mir/pretty.rs
@@ -219,7 +219,7 @@ impl<'a> MirPrettyCtx<'a> {
 
     fn local_name(&self, local: LocalId) -> LocalName {
         match self.local_to_binding.get(local) {
-            Some(b) => LocalName::Binding(self.hir_body.bindings[*b].name.clone(), local),
+            Some(b) => LocalName::Binding(self.hir_body[*b].name.clone(), local),
             None => LocalName::Unknown(local),
         }
     }
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/tests.rs b/src/tools/rust-analyzer/crates/hir-ty/src/tests.rs
index 79754bc8a09..9605a0b4124 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/tests.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/tests.rs
@@ -168,7 +168,7 @@ fn check_impl(
         let inference_result = db.infer(def);
 
         for (pat, mut ty) in inference_result.type_of_pat.iter() {
-            if let Pat::Bind { id, .. } = body.pats[pat] {
+            if let Pat::Bind { id, .. } = body[pat] {
                 ty = &inference_result.type_of_binding[id];
             }
             let node = match pat_node(&body_source_map, pat, &db) {
@@ -316,7 +316,7 @@ fn infer_with_mismatches(content: &str, include_mismatches: bool) -> String {
         }
 
         for (pat, mut ty) in inference_result.type_of_pat.iter() {
-            if let Pat::Bind { id, .. } = body.pats[pat] {
+            if let Pat::Bind { id, .. } = body[pat] {
                 ty = &inference_result.type_of_binding[id];
             }
             let node = match body_source_map.pat_syntax(pat) {
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/variance.rs b/src/tools/rust-analyzer/crates/hir-ty/src/variance.rs
index 87d9df611bd..08a215fecf6 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/variance.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/variance.rs
@@ -54,14 +54,14 @@ pub(crate) fn variances_of(db: &dyn HirDatabase, def: GenericDefId) -> Option<Ar
     variances.is_empty().not().then(|| Arc::from_iter(variances))
 }
 
-pub(crate) fn variances_of_cycle_fn(
-    _db: &dyn HirDatabase,
-    _result: &Option<Arc<[Variance]>>,
-    _count: u32,
-    _def: GenericDefId,
-) -> salsa::CycleRecoveryAction<Option<Arc<[Variance]>>> {
-    salsa::CycleRecoveryAction::Iterate
-}
+// pub(crate) fn variances_of_cycle_fn(
+//     _db: &dyn HirDatabase,
+//     _result: &Option<Arc<[Variance]>>,
+//     _count: u32,
+//     _def: GenericDefId,
+// ) -> salsa::CycleRecoveryAction<Option<Arc<[Variance]>>> {
+//     salsa::CycleRecoveryAction::Iterate
+// }
 
 pub(crate) fn variances_of_cycle_initial(
     db: &dyn HirDatabase,
@@ -965,7 +965,7 @@ struct S3<T>(S<T, T>);
 struct FixedPoint<T, U, V>(&'static FixedPoint<(), T, U>, V);
 "#,
             expect![[r#"
-                FixedPoint[T: covariant, U: covariant, V: covariant]
+                FixedPoint[T: bivariant, U: bivariant, V: bivariant]
             "#]],
         );
     }
diff --git a/src/tools/rust-analyzer/crates/hir/src/lib.rs b/src/tools/rust-analyzer/crates/hir/src/lib.rs
index 5c6f622e6c3..1b2b76999f7 100644
--- a/src/tools/rust-analyzer/crates/hir/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/lib.rs
@@ -2036,7 +2036,7 @@ impl DefWithBody {
                     )
                 }
                 let mol = &borrowck_result.mutability_of_locals;
-                for (binding_id, binding_data) in body.bindings.iter() {
+                for (binding_id, binding_data) in body.bindings() {
                     if binding_data.problems.is_some() {
                         // We should report specific diagnostics for these problems, not `need-mut` and `unused-mut`.
                         continue;
@@ -3222,7 +3222,8 @@ impl Macro {
         }
     }
 
-    pub fn is_asm_or_global_asm(&self, db: &dyn HirDatabase) -> bool {
+    /// Is this `asm!()`, or a variant of it (e.g. `global_asm!()`)?
+    pub fn is_asm_like(&self, db: &dyn HirDatabase) -> bool {
         match self.id {
             MacroId::Macro2Id(it) => {
                 matches!(it.lookup(db).expander, MacroExpander::BuiltIn(m) if m.is_asm())
diff --git a/src/tools/rust-analyzer/crates/hir/src/semantics.rs b/src/tools/rust-analyzer/crates/hir/src/semantics.rs
index 247bb693983..adba59236a4 100644
--- a/src/tools/rust-analyzer/crates/hir/src/semantics.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/semantics.rs
@@ -677,8 +677,7 @@ impl<'db> SemanticsImpl<'db> {
     pub fn rename_conflicts(&self, to_be_renamed: &Local, new_name: &Name) -> Vec<Local> {
         let body = self.db.body(to_be_renamed.parent);
         let resolver = to_be_renamed.parent.resolver(self.db);
-        let starting_expr =
-            body.binding_owners.get(&to_be_renamed.binding_id).copied().unwrap_or(body.body_expr);
+        let starting_expr = body.binding_owner(to_be_renamed.binding_id).unwrap_or(body.body_expr);
         let mut visitor = RenameConflictsVisitor {
             body: &body,
             conflicts: FxHashSet::default(),
@@ -1776,7 +1775,7 @@ impl<'db> SemanticsImpl<'db> {
 
     pub fn is_unsafe_macro_call(&self, macro_call: &ast::MacroCall) -> bool {
         let Some(mac) = self.resolve_macro_call(macro_call) else { return false };
-        if mac.is_asm_or_global_asm(self.db) {
+        if mac.is_asm_like(self.db) {
             return true;
         }
 
diff --git a/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs b/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs
index 0662bfddcf8..ecc6e5f3d03 100644
--- a/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/source_analyzer.rs
@@ -242,11 +242,7 @@ impl<'db> SourceAnalyzer<'db> {
 
     fn binding_id_of_pat(&self, pat: &ast::IdentPat) -> Option<BindingId> {
         let pat_id = self.pat_id(&pat.clone().into())?;
-        if let Pat::Bind { id, .. } = self.store()?.pats[pat_id.as_pat()?] {
-            Some(id)
-        } else {
-            None
-        }
+        if let Pat::Bind { id, .. } = self.store()?[pat_id.as_pat()?] { Some(id) } else { None }
     }
 
     pub(crate) fn expr_adjustments(&self, expr: &ast::Expr) -> Option<&[Adjustment]> {
@@ -995,7 +991,7 @@ impl<'db> SourceAnalyzer<'db> {
         let parent_hir_path = path
             .parent_path()
             .and_then(|p| collector.lower_path(p, &mut ExprCollector::impl_trait_error_allocator));
-        let store = collector.store.finish();
+        let (store, _) = collector.store.finish();
 
         // Case where path is a qualifier of a use tree, e.g. foo::bar::{Baz, Qux} where we are
         // trying to resolve foo::bar.
@@ -1204,7 +1200,7 @@ impl<'db> SourceAnalyzer<'db> {
         let mut collector = ExprCollector::new(db, self.resolver.module(), self.file_id);
         let hir_path =
             collector.lower_path(path.clone(), &mut ExprCollector::impl_trait_error_allocator)?;
-        let store = collector.store.finish();
+        let (store, _) = collector.store.finish();
         Some(resolve_hir_path_(
             db,
             &self.resolver,
@@ -1439,9 +1435,11 @@ fn scope_for(
 ) -> Option<ScopeId> {
     node.ancestors_with_macros(db)
         .take_while(|it| {
-            !ast::Item::can_cast(it.kind())
-                || ast::MacroCall::can_cast(it.kind())
-                || ast::Use::can_cast(it.kind())
+            let kind = it.kind();
+            !ast::Item::can_cast(kind)
+                || ast::MacroCall::can_cast(kind)
+                || ast::Use::can_cast(kind)
+                || ast::AsmExpr::can_cast(kind)
         })
         .filter_map(|it| it.map(ast::Expr::cast).transpose())
         .filter_map(|it| source_map.node_expr(it.as_ref())?.as_expr())
diff --git a/src/tools/rust-analyzer/crates/hir/src/symbols.rs b/src/tools/rust-analyzer/crates/hir/src/symbols.rs
index 756650891d4..dca10193e29 100644
--- a/src/tools/rust-analyzer/crates/hir/src/symbols.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/symbols.rs
@@ -125,6 +125,13 @@ impl<'a> SymbolCollector<'a> {
                 }
                 ModuleDefId::AdtId(AdtId::EnumId(id)) => {
                     this.push_decl(id, name, false, None);
+                    let enum_name = this.db.enum_signature(id).name.as_str().to_smolstr();
+                    this.with_container_name(Some(enum_name), |this| {
+                        let variants = id.enum_variants(this.db);
+                        for (variant_id, variant_name, _) in &variants.variants {
+                            this.push_decl(*variant_id, variant_name, true, None);
+                        }
+                    });
                 }
                 ModuleDefId::AdtId(AdtId::UnionId(id)) => {
                     this.push_decl(id, name, false, None);
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_match_to_let_else.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_match_to_let_else.rs
index efcbcef00e9..9126e869b9a 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_match_to_let_else.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_match_to_let_else.rs
@@ -1,8 +1,8 @@
 use ide_db::defs::{Definition, NameRefClass};
 use syntax::{
     AstNode, SyntaxNode,
-    ast::{self, HasName, Name},
-    ted,
+    ast::{self, HasName, Name, syntax_factory::SyntaxFactory},
+    syntax_editor::SyntaxEditor,
 };
 
 use crate::{
@@ -121,34 +121,36 @@ fn find_extracted_variable(ctx: &AssistContext<'_>, arm: &ast::MatchArm) -> Opti
 
 // Rename `extracted` with `binding` in `pat`.
 fn rename_variable(pat: &ast::Pat, extracted: &[Name], binding: ast::Pat) -> SyntaxNode {
-    let syntax = pat.syntax().clone_for_update();
+    let syntax = pat.syntax().clone_subtree();
+    let mut editor = SyntaxEditor::new(syntax.clone());
+    let make = SyntaxFactory::with_mappings();
     let extracted = extracted
         .iter()
-        .map(|e| syntax.covering_element(e.syntax().text_range()))
+        .map(|e| e.syntax().text_range() - pat.syntax().text_range().start())
+        .map(|r| syntax.covering_element(r))
         .collect::<Vec<_>>();
     for extracted_syntax in extracted {
         // If `extracted` variable is a record field, we should rename it to `binding`,
         // otherwise we just need to replace `extracted` with `binding`.
-
         if let Some(record_pat_field) =
             extracted_syntax.ancestors().find_map(ast::RecordPatField::cast)
         {
             if let Some(name_ref) = record_pat_field.field_name() {
-                ted::replace(
+                editor.replace(
                     record_pat_field.syntax(),
-                    ast::make::record_pat_field(
-                        ast::make::name_ref(&name_ref.text()),
-                        binding.clone(),
+                    make.record_pat_field(
+                        make.name_ref(&name_ref.text()),
+                        binding.clone_for_update(),
                     )
-                    .syntax()
-                    .clone_for_update(),
+                    .syntax(),
                 );
             }
         } else {
-            ted::replace(extracted_syntax, binding.clone().syntax().clone_for_update());
+            editor.replace(extracted_syntax, binding.syntax().clone_for_update());
         }
     }
-    syntax
+    editor.add_mappings(make.finish_with_mappings());
+    editor.finish().new_root().clone()
 }
 
 #[cfg(test)]
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_named_struct_to_tuple_struct.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_named_struct_to_tuple_struct.rs
index 32c4ae2e869..8d27574eb2c 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_named_struct_to_tuple_struct.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_named_struct_to_tuple_struct.rs
@@ -4,7 +4,8 @@ use itertools::Itertools;
 use syntax::{
     SyntaxKind,
     ast::{self, AstNode, HasAttrs, HasGenericParams, HasVisibility},
-    match_ast, ted,
+    match_ast,
+    syntax_editor::{Position, SyntaxEditor},
 };
 
 use crate::{AssistContext, AssistId, Assists, assist_context::SourceChangeBuilder};
@@ -97,11 +98,14 @@ fn edit_struct_def(
     // Note that we don't need to consider macro files in this function because this is
     // currently not triggered for struct definitions inside macro calls.
     let tuple_fields = record_fields.fields().filter_map(|f| {
-        let field = ast::make::tuple_field(f.visibility(), f.ty()?).clone_for_update();
-        ted::insert_all(
-            ted::Position::first_child_of(field.syntax()),
+        let field = ast::make::tuple_field(f.visibility(), f.ty()?);
+        let mut editor = SyntaxEditor::new(field.syntax().clone());
+        editor.insert_all(
+            Position::first_child_of(field.syntax()),
             f.attrs().map(|attr| attr.syntax().clone_subtree().clone_for_update().into()).collect(),
         );
+        let field_syntax = editor.finish().new_root().clone();
+        let field = ast::TupleField::cast(field_syntax)?;
         Some(field)
     });
     let tuple_fields = ast::make::tuple_field_list(tuple_fields);
@@ -1086,8 +1090,7 @@ pub struct $0Foo {
 }
 "#,
             r#"
-pub struct Foo(#[my_custom_attr]
-u32);
+pub struct Foo(#[my_custom_attr]u32);
 "#,
         );
     }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_default_from_new.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_default_from_new.rs
index 79a78ab3698..47233fb399d 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_default_from_new.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_default_from_new.rs
@@ -2,7 +2,7 @@ use ide_db::famous_defs::FamousDefs;
 use stdx::format_to;
 use syntax::{
     AstNode,
-    ast::{self, HasGenericParams, HasName, Impl, make},
+    ast::{self, HasGenericParams, HasName, HasTypeBounds, Impl, make},
 };
 
 use crate::{
@@ -88,20 +88,19 @@ fn generate_trait_impl_text_from_impl(
     let generic_params = impl_.generic_param_list().map(|generic_params| {
         let lifetime_params =
             generic_params.lifetime_params().map(ast::GenericParam::LifetimeParam);
-        let ty_or_const_params = generic_params.type_or_const_params().map(|param| {
+        let ty_or_const_params = generic_params.type_or_const_params().filter_map(|param| {
             // remove defaults since they can't be specified in impls
-            match param {
+            let param = match param {
                 ast::TypeOrConstParam::Type(param) => {
-                    let param = param.clone_for_update();
-                    param.remove_default();
+                    let param = make::type_param(param.name()?, param.type_bound_list());
                     ast::GenericParam::TypeParam(param)
                 }
                 ast::TypeOrConstParam::Const(param) => {
-                    let param = param.clone_for_update();
-                    param.remove_default();
+                    let param = make::const_param(param.name()?, param.ty()?);
                     ast::GenericParam::ConstParam(param)
                 }
-            }
+            };
+            Some(param)
         });
 
         make::generic_param_list(itertools::chain(lifetime_params, ty_or_const_params))
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_deref.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_deref.rs
index c7b97dcd231..55a09c5d775 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_deref.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_deref.rs
@@ -10,7 +10,7 @@ use syntax::{
 use crate::{
     AssistId,
     assist_context::{AssistContext, Assists, SourceChangeBuilder},
-    utils::generate_trait_impl_text,
+    utils::generate_trait_impl_text_intransitive,
 };
 
 // Assist: generate_deref
@@ -150,7 +150,7 @@ fn generate_edit(
         ),
     };
     let strukt_adt = ast::Adt::Struct(strukt);
-    let deref_impl = generate_trait_impl_text(
+    let deref_impl = generate_trait_impl_text_intransitive(
         &strukt_adt,
         &trait_path.display(db, edition).to_string(),
         &impl_code,
@@ -228,6 +228,28 @@ impl core::ops::Deref for B {
     }
 
     #[test]
+    fn test_generate_record_deref_with_generic() {
+        check_assist(
+            generate_deref,
+            r#"
+//- minicore: deref
+struct A<T>($0T);
+"#,
+            r#"
+struct A<T>(T);
+
+impl<T> core::ops::Deref for A<T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+"#,
+        );
+    }
+
+    #[test]
     fn test_generate_record_deref_short_path() {
         check_assist(
             generate_deref,
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_getter_or_setter.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_getter_or_setter.rs
index c7e5e41aac4..20ee9253d37 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_getter_or_setter.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_getter_or_setter.rs
@@ -294,7 +294,7 @@ fn generate_setter_from_info(info: &AssistInfo, record_field_info: &RecordFieldI
     let self_expr = make::ext::expr_self();
     let lhs = make::expr_field(self_expr, field_name);
     let rhs = make::expr_path(make::ext::ident_path(field_name));
-    let assign_stmt = make::expr_stmt(make::expr_assignment(lhs, rhs));
+    let assign_stmt = make::expr_stmt(make::expr_assignment(lhs, rhs).into());
     let body = make::block_expr([assign_stmt.into()], None);
 
     // Make the setter fn
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_impl.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_impl.rs
index 2862e6d5afb..14601ca0207 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_impl.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_impl.rs
@@ -1,14 +1,14 @@
 use syntax::{
     ast::{self, AstNode, HasName, edit_in_place::Indent, make},
-    ted,
+    syntax_editor::{Position, SyntaxEditor},
 };
 
 use crate::{AssistContext, AssistId, Assists, utils};
 
-fn insert_impl(impl_: ast::Impl, nominal: &ast::Adt) {
+fn insert_impl(editor: &mut SyntaxEditor, impl_: &ast::Impl, nominal: &ast::Adt) {
     let indent = nominal.indent_level();
-    ted::insert_all_raw(
-        ted::Position::after(nominal.syntax()),
+    editor.insert_all(
+        Position::after(nominal.syntax()),
         vec![
             // Add a blank line after the ADT, and indentation for the impl to match the ADT
             make::tokens::whitespace(&format!("\n\n{indent}")).into(),
@@ -51,14 +51,17 @@ pub(crate) fn generate_impl(acc: &mut Assists, ctx: &AssistContext<'_>) -> Optio
             // Generate the impl
             let impl_ = utils::generate_impl(&nominal);
 
+            let mut editor = edit.make_editor(nominal.syntax());
             // Add a tabstop after the left curly brace
             if let Some(cap) = ctx.config.snippet_cap {
                 if let Some(l_curly) = impl_.assoc_item_list().and_then(|it| it.l_curly_token()) {
-                    edit.add_tabstop_after_token(cap, l_curly);
+                    let tabstop = edit.make_tabstop_after(cap);
+                    editor.add_annotation(l_curly, tabstop);
                 }
             }
 
-            insert_impl(impl_, &edit.make_mut(nominal));
+            insert_impl(&mut editor, &impl_, &nominal);
+            edit.add_file_edits(ctx.vfs_file_id(), editor);
         },
     )
 }
@@ -97,18 +100,22 @@ pub(crate) fn generate_trait_impl(acc: &mut Assists, ctx: &AssistContext<'_>) ->
             // Generate the impl
             let impl_ = utils::generate_trait_impl_intransitive(&nominal, make::ty_placeholder());
 
+            let mut editor = edit.make_editor(nominal.syntax());
             // Make the trait type a placeholder snippet
             if let Some(cap) = ctx.config.snippet_cap {
                 if let Some(trait_) = impl_.trait_() {
-                    edit.add_placeholder_snippet(cap, trait_);
+                    let placeholder = edit.make_placeholder_snippet(cap);
+                    editor.add_annotation(trait_.syntax(), placeholder);
                 }
 
                 if let Some(l_curly) = impl_.assoc_item_list().and_then(|it| it.l_curly_token()) {
-                    edit.add_tabstop_after_token(cap, l_curly);
+                    let tabstop = edit.make_tabstop_after(cap);
+                    editor.add_annotation(l_curly, tabstop);
                 }
             }
 
-            insert_impl(impl_, &edit.make_mut(nominal));
+            insert_impl(&mut editor, &impl_, &nominal);
+            edit.add_file_edits(ctx.vfs_file_id(), editor);
         },
     )
 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_mut_trait_impl.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_mut_trait_impl.rs
index bab2ccf3f33..dc26ec79a74 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_mut_trait_impl.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_mut_trait_impl.rs
@@ -1,6 +1,6 @@
-use ide_db::famous_defs::FamousDefs;
+use ide_db::{famous_defs::FamousDefs, traits::resolve_target_trait};
 use syntax::{
-    AstNode,
+    AstNode, T,
     ast::{self, edit_in_place::Indent, make},
     ted,
 };
@@ -32,7 +32,7 @@ use crate::{AssistContext, AssistId, Assists};
 //
 // $0impl<T> core::ops::IndexMut<Axis> for [T; 3] {
 //     fn index_mut(&mut self, index: Axis) -> &mut Self::Output {
-//         &self[index as usize]
+//         &mut self[index as usize]
 //     }
 // }
 //
@@ -48,36 +48,34 @@ pub(crate) fn generate_mut_trait_impl(acc: &mut Assists, ctx: &AssistContext<'_>
     let impl_def = ctx.find_node_at_offset::<ast::Impl>()?.clone_for_update();
     let indent = impl_def.indent_level();
 
-    let trait_ = impl_def.trait_()?;
-    if let ast::Type::PathType(trait_path) = trait_ {
-        let trait_type = ctx.sema.resolve_trait(&trait_path.path()?)?;
-        let scope = ctx.sema.scope(trait_path.syntax())?;
-        if trait_type != FamousDefs(&ctx.sema, scope.krate()).core_convert_Index()? {
-            return None;
-        }
-    }
+    let ast::Type::PathType(path) = impl_def.trait_()? else {
+        return None;
+    };
+    let trait_name = path.path()?.segment()?.name_ref()?;
+
+    let scope = ctx.sema.scope(impl_def.trait_()?.syntax())?;
+    let famous = FamousDefs(&ctx.sema, scope.krate());
+
+    let trait_ = resolve_target_trait(&ctx.sema, &impl_def)?;
+    let trait_new = get_trait_mut(&trait_, famous)?;
 
     // Index -> IndexMut
-    let index_trait = impl_def
-        .syntax()
-        .descendants()
-        .filter_map(ast::NameRef::cast)
-        .find(|it| it.text() == "Index")?;
-    ted::replace(
-        index_trait.syntax(),
-        make::path_segment(make::name_ref("IndexMut")).clone_for_update().syntax(),
-    );
+    ted::replace(trait_name.syntax(), make::name_ref(trait_new).clone_for_update().syntax());
 
     // index -> index_mut
-    let trait_method_name = impl_def
+    let (trait_method_name, new_trait_method_name) = impl_def
         .syntax()
         .descendants()
         .filter_map(ast::Name::cast)
-        .find(|it| it.text() == "index")?;
-    ted::replace(trait_method_name.syntax(), make::name("index_mut").clone_for_update().syntax());
+        .find_map(process_method_name)?;
+    ted::replace(
+        trait_method_name.syntax(),
+        make::name(new_trait_method_name).clone_for_update().syntax(),
+    );
 
-    let type_alias = impl_def.syntax().descendants().find_map(ast::TypeAlias::cast)?;
-    ted::remove(type_alias.syntax());
+    if let Some(type_alias) = impl_def.syntax().descendants().find_map(ast::TypeAlias::cast) {
+        ted::remove(type_alias.syntax());
+    }
 
     // &self -> &mut self
     let mut_self_param = make::mut_self_param();
@@ -87,15 +85,14 @@ pub(crate) fn generate_mut_trait_impl(acc: &mut Assists, ctx: &AssistContext<'_>
 
     // &Self::Output -> &mut Self::Output
     let ret_type = impl_def.syntax().descendants().find_map(ast::RetType::cast)?;
-    ted::replace(
-        ret_type.syntax(),
-        make::ret_type(make::ty("&mut Self::Output")).clone_for_update().syntax(),
-    );
+    let new_ret_type = process_ret_type(&ret_type)?;
+    ted::replace(ret_type.syntax(), make::ret_type(new_ret_type).clone_for_update().syntax());
 
     let fn_ = impl_def.assoc_item_list()?.assoc_items().find_map(|it| match it {
         ast::AssocItem::Fn(f) => Some(f),
         _ => None,
     })?;
+    let _ = process_ref_mut(&fn_);
 
     let assoc_list = make::assoc_item_list().clone_for_update();
     ted::replace(impl_def.assoc_item_list()?.syntax(), assoc_list.syntax());
@@ -104,7 +101,7 @@ pub(crate) fn generate_mut_trait_impl(acc: &mut Assists, ctx: &AssistContext<'_>
     let target = impl_def.syntax().text_range();
     acc.add(
         AssistId::generate("generate_mut_trait_impl"),
-        "Generate `IndexMut` impl from this `Index` trait",
+        format!("Generate `{trait_new}` impl from this `{trait_name}` trait"),
         target,
         |edit| {
             edit.insert(target.start(), format!("$0{impl_def}\n\n{indent}"));
@@ -112,6 +109,56 @@ pub(crate) fn generate_mut_trait_impl(acc: &mut Assists, ctx: &AssistContext<'_>
     )
 }
 
+fn process_ref_mut(fn_: &ast::Fn) -> Option<()> {
+    let expr = fn_.body()?.tail_expr()?;
+    match &expr {
+        ast::Expr::RefExpr(ref_expr) if ref_expr.mut_token().is_none() => {
+            ted::insert_all_raw(
+                ted::Position::after(ref_expr.amp_token()?),
+                vec![make::token(T![mut]).into(), make::tokens::whitespace(" ").into()],
+            );
+        }
+        _ => {}
+    }
+    None
+}
+
+fn get_trait_mut(apply_trait: &hir::Trait, famous: FamousDefs<'_, '_>) -> Option<&'static str> {
+    let trait_ = Some(apply_trait);
+    if trait_ == famous.core_convert_Index().as_ref() {
+        return Some("IndexMut");
+    }
+    if trait_ == famous.core_convert_AsRef().as_ref() {
+        return Some("AsMut");
+    }
+    if trait_ == famous.core_borrow_Borrow().as_ref() {
+        return Some("BorrowMut");
+    }
+    if trait_ == famous.core_ops_Deref().as_ref() {
+        return Some("DerefMut");
+    }
+    None
+}
+
+fn process_method_name(name: ast::Name) -> Option<(ast::Name, &'static str)> {
+    let new_name = match &*name.text() {
+        "index" => "index_mut",
+        "as_ref" => "as_mut",
+        "borrow" => "borrow_mut",
+        "deref" => "deref_mut",
+        _ => return None,
+    };
+    Some((name, new_name))
+}
+
+fn process_ret_type(ref_ty: &ast::RetType) -> Option<ast::Type> {
+    let ty = ref_ty.ty()?;
+    let ast::Type::RefType(ref_type) = ty else {
+        return None;
+    };
+    Some(make::ty_ref(ref_type.ty()?, true))
+}
+
 #[cfg(test)]
 mod tests {
     use crate::tests::{check_assist, check_assist_not_applicable};
@@ -139,7 +186,7 @@ pub enum Axis { X = 0, Y = 1, Z = 2 }
 
 $0impl<T> core::ops::IndexMut<Axis> for [T; 3] {
     fn index_mut(&mut self, index: Axis) -> &mut Self::Output {
-        &self[index as usize]
+        &mut self[index as usize]
     }
 }
 
@@ -188,6 +235,68 @@ impl<T> core::ops::Index<Axis> for [T; 3] where T: Copy {
 }
 "#,
         );
+
+        check_assist(
+            generate_mut_trait_impl,
+            r#"
+//- minicore: as_ref
+struct Foo(i32);
+
+impl core::convert::AsRef$0<i32> for Foo {
+    fn as_ref(&self) -> &i32 {
+        &self.0
+    }
+}
+"#,
+            r#"
+struct Foo(i32);
+
+$0impl core::convert::AsMut<i32> for Foo {
+    fn as_mut(&mut self) -> &mut i32 {
+        &mut self.0
+    }
+}
+
+impl core::convert::AsRef<i32> for Foo {
+    fn as_ref(&self) -> &i32 {
+        &self.0
+    }
+}
+"#,
+        );
+
+        check_assist(
+            generate_mut_trait_impl,
+            r#"
+//- minicore: deref
+struct Foo(i32);
+
+impl core::ops::Deref$0 for Foo {
+    type Target = i32;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+"#,
+            r#"
+struct Foo(i32);
+
+$0impl core::ops::DerefMut for Foo {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+impl core::ops::Deref for Foo {
+    type Target = i32;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+"#,
+        );
     }
 
     #[test]
@@ -287,5 +396,13 @@ pub trait Index<Idx: ?Sized> {}
 impl<T> Index$0<i32> for [T; 3] {}
 "#,
         );
+        check_assist_not_applicable(
+            generate_mut_trait_impl,
+            r#"
+pub trait AsRef<T: ?Sized> {}
+
+impl AsRef$0<i32> for [T; 3] {}
+"#,
+        );
     }
 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_new.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_new.rs
index 4837f92f934..51c2f65e025 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_new.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_new.rs
@@ -1,5 +1,6 @@
 use ide_db::{
-    imports::import_assets::item_for_path_search, use_trivial_constructor::use_trivial_constructor,
+    imports::import_assets::item_for_path_search, syntax_helpers::suggest_name::NameGenerator,
+    use_trivial_constructor::use_trivial_constructor,
 };
 use syntax::{
     ast::{self, AstNode, HasName, HasVisibility, StructKind, edit_in_place::Indent, make},
@@ -35,10 +36,30 @@ use crate::{
 pub(crate) fn generate_new(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
     let strukt = ctx.find_node_at_offset::<ast::Struct>()?;
 
-    // We want to only apply this to non-union structs with named fields
     let field_list = match strukt.kind() {
-        StructKind::Record(named) => named,
-        _ => return None,
+        StructKind::Record(named) => {
+            named.fields().filter_map(|f| Some((f.name()?, f.ty()?))).collect::<Vec<_>>()
+        }
+        StructKind::Tuple(tuple) => {
+            let mut name_generator = NameGenerator::default();
+            tuple
+                .fields()
+                .enumerate()
+                .filter_map(|(i, f)| {
+                    let ty = f.ty()?;
+                    let name = match name_generator.for_type(
+                        &ctx.sema.resolve_type(&ty)?,
+                        ctx.db(),
+                        ctx.edition(),
+                    ) {
+                        Some(name) => name,
+                        None => name_generator.suggest_name(&format!("_{i}")),
+                    };
+                    Some((make::name(name.as_str()), f.ty()?))
+                })
+                .collect::<Vec<_>>()
+        }
+        StructKind::Unit => return None,
     };
 
     // Return early if we've found an existing new fn
@@ -50,11 +71,9 @@ pub(crate) fn generate_new(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option
     let target = strukt.syntax().text_range();
     acc.add(AssistId::generate("generate_new"), "Generate `new`", target, |builder| {
         let trivial_constructors = field_list
-            .fields()
-            .map(|f| {
-                let name = f.name()?;
-
-                let ty = ctx.sema.resolve_type(&f.ty()?)?;
+            .iter()
+            .map(|(name, ty)| {
+                let ty = ctx.sema.resolve_type(ty)?;
 
                 let item_in_ns = hir::ItemInNs::from(hir::ModuleDef::from(ty.as_adt()?));
 
@@ -73,34 +92,44 @@ pub(crate) fn generate_new(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option
                     edition,
                 )?;
 
-                Some(make::record_expr_field(make::name_ref(&name.text()), Some(expr)))
+                Some((make::name_ref(&name.text()), Some(expr)))
             })
             .collect::<Vec<_>>();
 
-        let params = field_list.fields().enumerate().filter_map(|(i, f)| {
+        let params = field_list.iter().enumerate().filter_map(|(i, (name, ty))| {
             if trivial_constructors[i].is_none() {
-                let name = f.name()?;
-                let ty = f.ty()?;
-
-                Some(make::param(make::ident_pat(false, false, name).into(), ty))
+                Some(make::param(make::ident_pat(false, false, name.clone()).into(), ty.clone()))
             } else {
                 None
             }
         });
         let params = make::param_list(None, params);
 
-        let fields = field_list.fields().enumerate().filter_map(|(i, f)| {
-            let constructor = trivial_constructors[i].clone();
-            if constructor.is_some() {
+        let fields = field_list.iter().enumerate().map(|(i, (name, _))| {
+            if let Some(constructor) = trivial_constructors[i].clone() {
                 constructor
             } else {
-                Some(make::record_expr_field(make::name_ref(&f.name()?.text()), None))
+                (make::name_ref(&name.text()), None)
             }
         });
-        let fields = make::record_expr_field_list(fields);
 
-        let record_expr = make::record_expr(make::ext::ident_path("Self"), fields);
-        let body = make::block_expr(None, Some(record_expr.into()));
+        let tail_expr: ast::Expr = match strukt.kind() {
+            StructKind::Record(_) => {
+                let fields = fields.map(|(name, expr)| make::record_expr_field(name, expr));
+                let fields = make::record_expr_field_list(fields);
+                make::record_expr(make::ext::ident_path("Self"), fields).into()
+            }
+            StructKind::Tuple(_) => {
+                let args = fields.map(|(arg, expr)| {
+                    let arg = || make::expr_path(make::path_unqualified(make::path_segment(arg)));
+                    expr.unwrap_or_else(arg)
+                });
+                let arg_list = make::arg_list(args);
+                make::expr_call(make::expr_path(make::ext::ident_path("Self")), arg_list).into()
+            }
+            StructKind::Unit => unreachable!(),
+        };
+        let body = make::block_expr(None, tail_expr.into());
 
         let ret_type = make::ret_type(make::ty_path(make::ext::ident_path("Self")));
 
@@ -120,8 +149,35 @@ pub(crate) fn generate_new(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option
         .clone_for_update();
         fn_.indent(1.into());
 
-        // Add a tabstop before the name
         if let Some(cap) = ctx.config.snippet_cap {
+            match strukt.kind() {
+                StructKind::Tuple(_) => {
+                    let struct_args = fn_
+                        .body()
+                        .unwrap()
+                        .syntax()
+                        .descendants()
+                        .filter(|it| syntax::ast::ArgList::can_cast(it.kind()))
+                        .flat_map(|args| args.children())
+                        .filter(|it| syntax::ast::PathExpr::can_cast(it.kind()))
+                        .enumerate()
+                        .filter_map(|(i, node)| {
+                            if trivial_constructors[i].is_none() { Some(node) } else { None }
+                        });
+                    if let Some(fn_params) = fn_.param_list() {
+                        for (struct_arg, fn_param) in struct_args.zip(fn_params.params()) {
+                            if let Some(fn_pat) = fn_param.pat() {
+                                let fn_pat = fn_pat.syntax().clone();
+                                builder
+                                    .add_placeholder_snippet_group(cap, vec![struct_arg, fn_pat]);
+                            }
+                        }
+                    }
+                }
+                _ => {}
+            }
+
+            // Add a tabstop before the name
             if let Some(name) = fn_.name() {
                 builder.add_tabstop_before(cap, name);
             }
@@ -157,7 +213,7 @@ pub(crate) fn generate_new(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option
 }
 
 #[cfg(test)]
-mod tests {
+mod record_tests {
     use crate::tests::{check_assist, check_assist_not_applicable, check_assist_target};
 
     use super::*;
@@ -695,3 +751,308 @@ impl<T> Source<T> {
         );
     }
 }
+
+#[cfg(test)]
+mod tuple_tests {
+    use crate::tests::{check_assist, check_assist_not_applicable, check_assist_target};
+
+    use super::*;
+
+    #[test]
+    fn test_generate_new_with_zst_fields() {
+        check_assist(
+            generate_new,
+            r#"
+struct Empty;
+
+struct Foo(Empty$0);
+"#,
+            r#"
+struct Empty;
+
+struct Foo(Empty);
+
+impl Foo {
+    fn $0new() -> Self {
+        Self(Empty)
+    }
+}
+"#,
+        );
+        check_assist(
+            generate_new,
+            r#"
+struct Empty;
+
+struct Foo(String, Empty$0);
+"#,
+            r#"
+struct Empty;
+
+struct Foo(String, Empty);
+
+impl Foo {
+    fn $0new(${1:_0}: String) -> Self {
+        Self(${1:_0}, Empty)
+    }
+}
+"#,
+        );
+        check_assist(
+            generate_new,
+            r#"
+enum Empty { Bar }
+
+struct Foo(Empty$0);
+"#,
+            r#"
+enum Empty { Bar }
+
+struct Foo(Empty);
+
+impl Foo {
+    fn $0new() -> Self {
+        Self(Empty::Bar)
+    }
+}
+"#,
+        );
+
+        // make sure the assist only works on unit variants
+        check_assist(
+            generate_new,
+            r#"
+struct Empty {}
+
+struct Foo(Empty$0);
+"#,
+            r#"
+struct Empty {}
+
+struct Foo(Empty);
+
+impl Foo {
+    fn $0new(${1:empty}: Empty) -> Self {
+        Self(${1:empty})
+    }
+}
+"#,
+        );
+        check_assist(
+            generate_new,
+            r#"
+enum Empty { Bar {} }
+
+struct Foo(Empty$0);
+"#,
+            r#"
+enum Empty { Bar {} }
+
+struct Foo(Empty);
+
+impl Foo {
+    fn $0new(${1:empty}: Empty) -> Self {
+        Self(${1:empty})
+    }
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn test_generate_new() {
+        check_assist(
+            generate_new,
+            r#"
+struct Foo($0);
+"#,
+            r#"
+struct Foo();
+
+impl Foo {
+    fn $0new() -> Self {
+        Self()
+    }
+}
+"#,
+        );
+        check_assist(
+            generate_new,
+            r#"
+struct Foo<T: Clone>($0);
+"#,
+            r#"
+struct Foo<T: Clone>();
+
+impl<T: Clone> Foo<T> {
+    fn $0new() -> Self {
+        Self()
+    }
+}
+"#,
+        );
+        check_assist(
+            generate_new,
+            r#"
+struct Foo<'a, T: Foo<'a>>($0);
+"#,
+            r#"
+struct Foo<'a, T: Foo<'a>>();
+
+impl<'a, T: Foo<'a>> Foo<'a, T> {
+    fn $0new() -> Self {
+        Self()
+    }
+}
+"#,
+        );
+        check_assist(
+            generate_new,
+            r#"
+struct Foo(String$0);
+"#,
+            r#"
+struct Foo(String);
+
+impl Foo {
+    fn $0new(${1:_0}: String) -> Self {
+        Self(${1:_0})
+    }
+}
+"#,
+        );
+        check_assist(
+            generate_new,
+            r#"
+struct Vec<T> { };
+struct Foo(String, Vec<i32>$0);
+"#,
+            r#"
+struct Vec<T> { };
+struct Foo(String, Vec<i32>);
+
+impl Foo {
+    fn $0new(${1:_0}: String, ${2:items}: Vec<i32>) -> Self {
+        Self(${1:_0}, ${2:items})
+    }
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn check_that_visibility_modifiers_dont_get_brought_in() {
+        check_assist(
+            generate_new,
+            r#"
+struct Vec<T> { };
+struct Foo(pub String, pub Vec<i32>$0);
+"#,
+            r#"
+struct Vec<T> { };
+struct Foo(pub String, pub Vec<i32>);
+
+impl Foo {
+    fn $0new(${1:_0}: String, ${2:items}: Vec<i32>) -> Self {
+        Self(${1:_0}, ${2:items})
+    }
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn generate_new_not_applicable_if_fn_exists() {
+        check_assist_not_applicable(
+            generate_new,
+            r#"
+struct Foo($0);
+
+impl Foo {
+    fn new() -> Self {
+        Self
+    }
+}
+"#,
+        );
+
+        check_assist_not_applicable(
+            generate_new,
+            r#"
+struct Foo($0);
+
+impl Foo {
+    fn New() -> Self {
+        Self
+    }
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn generate_new_target() {
+        check_assist_target(
+            generate_new,
+            r#"
+struct SomeThingIrrelevant;
+/// Has a lifetime parameter
+struct Foo<'a, T: Foo<'a>>($0);
+struct EvenMoreIrrelevant;
+"#,
+            "/// Has a lifetime parameter
+struct Foo<'a, T: Foo<'a>>();",
+        );
+    }
+
+    #[test]
+    fn test_unrelated_new() {
+        check_assist(
+            generate_new,
+            r#"
+pub struct AstId<N: AstNode> {
+    file_id: HirFileId,
+    file_ast_id: FileAstId<N>,
+}
+
+impl<N: AstNode> AstId<N> {
+    pub fn new(file_id: HirFileId, file_ast_id: FileAstId<N>) -> AstId<N> {
+        AstId { file_id, file_ast_id }
+    }
+}
+
+pub struct Source<T>(pub HirFileId,$0 pub T);
+
+impl<T> Source<T> {
+    pub fn map<F: FnOnce(T) -> U, U>(self, f: F) -> Source<U> {
+        Source(self.file_id, f(self.ast))
+    }
+}
+"#,
+            r#"
+pub struct AstId<N: AstNode> {
+    file_id: HirFileId,
+    file_ast_id: FileAstId<N>,
+}
+
+impl<N: AstNode> AstId<N> {
+    pub fn new(file_id: HirFileId, file_ast_id: FileAstId<N>) -> AstId<N> {
+        AstId { file_id, file_ast_id }
+    }
+}
+
+pub struct Source<T>(pub HirFileId, pub T);
+
+impl<T> Source<T> {
+    pub fn $0new(${1:_0}: HirFileId, ${2:_1}: T) -> Self {
+        Self(${1:_0}, ${2:_1})
+    }
+
+    pub fn map<F: FnOnce(T) -> U, U>(self, f: F) -> Source<U> {
+        Source(self.file_id, f(self.ast))
+    }
+}
+"#,
+        );
+    }
+}
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_single_field_struct_from.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_single_field_struct_from.rs
new file mode 100644
index 00000000000..4e95ceb2e85
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/generate_single_field_struct_from.rs
@@ -0,0 +1,1000 @@
+use ast::make;
+use hir::{HasCrate, ModuleDef, Semantics};
+use ide_db::{
+    RootDatabase, famous_defs::FamousDefs, helpers::mod_path_to_ast,
+    imports::import_assets::item_for_path_search, use_trivial_constructor::use_trivial_constructor,
+};
+use syntax::{
+    TokenText,
+    ast::{self, AstNode, HasGenericParams, HasName, edit, edit_in_place::Indent},
+};
+
+use crate::{
+    AssistId,
+    assist_context::{AssistContext, Assists},
+    utils::add_cfg_attrs_to,
+};
+
+// Assist: generate_single_field_struct_from
+//
+// Implement From for a single field structure, ignore trivial types.
+//
+// ```
+// # //- minicore: from, phantom_data
+// use core::marker::PhantomData;
+// struct $0Foo<T> {
+//     id: i32,
+//     _phantom_data: PhantomData<T>,
+// }
+// ```
+// ->
+// ```
+// use core::marker::PhantomData;
+// struct Foo<T> {
+//     id: i32,
+//     _phantom_data: PhantomData<T>,
+// }
+//
+// impl<T> From<i32> for Foo<T> {
+//     fn from(id: i32) -> Self {
+//         Self { id, _phantom_data: PhantomData }
+//     }
+// }
+// ```
+pub(crate) fn generate_single_field_struct_from(
+    acc: &mut Assists,
+    ctx: &AssistContext<'_>,
+) -> Option<()> {
+    let strukt_name = ctx.find_node_at_offset::<ast::Name>()?;
+    let adt = ast::Adt::cast(strukt_name.syntax().parent()?)?;
+    let ast::Adt::Struct(strukt) = adt else {
+        return None;
+    };
+
+    let sema = &ctx.sema;
+    let (names, types) = get_fields(&strukt)?;
+
+    let module = sema.scope(strukt.syntax())?.module();
+    let constructors = make_constructors(ctx, module, &types);
+
+    if constructors.iter().filter(|expr| expr.is_none()).count() != 1 {
+        return None;
+    }
+    let main_field_i = constructors.iter().position(Option::is_none)?;
+    if from_impl_exists(&strukt, main_field_i, &ctx.sema).is_some() {
+        return None;
+    }
+
+    let main_field_name =
+        names.as_ref().map_or(TokenText::borrowed("value"), |names| names[main_field_i].text());
+    let main_field_ty = types[main_field_i].clone();
+
+    acc.add(
+        AssistId::generate("generate_single_field_struct_from"),
+        "Generate single field `From`",
+        strukt.syntax().text_range(),
+        |builder| {
+            let indent = strukt.indent_level();
+            let ty_where_clause = strukt.where_clause();
+            let type_gen_params = strukt.generic_param_list();
+            let type_gen_args = type_gen_params.as_ref().map(|params| params.to_generic_args());
+            let trait_gen_args = Some(make::generic_arg_list([ast::GenericArg::TypeArg(
+                make::type_arg(main_field_ty.clone()),
+            )]));
+
+            let ty = make::ty(&strukt_name.text());
+
+            let constructor =
+                make_adt_constructor(names.as_deref(), constructors, &main_field_name);
+            let body = make::block_expr([], Some(constructor));
+
+            let fn_ = make::fn_(
+                None,
+                make::name("from"),
+                None,
+                None,
+                make::param_list(
+                    None,
+                    [make::param(
+                        make::path_pat(make::path_from_text(&main_field_name)),
+                        main_field_ty,
+                    )],
+                ),
+                body,
+                Some(make::ret_type(make::ty("Self"))),
+                false,
+                false,
+                false,
+                false,
+            )
+            .clone_for_update();
+
+            fn_.indent(1.into());
+
+            let impl_ = make::impl_trait(
+                false,
+                None,
+                trait_gen_args,
+                type_gen_params,
+                type_gen_args,
+                false,
+                make::ty("From"),
+                ty.clone(),
+                None,
+                ty_where_clause.map(|wc| edit::AstNodeEdit::reset_indent(&wc)),
+                None,
+            )
+            .clone_for_update();
+
+            impl_.get_or_create_assoc_item_list().add_item(fn_.into());
+
+            add_cfg_attrs_to(&strukt, &impl_);
+
+            impl_.reindent_to(indent);
+
+            builder.insert(strukt.syntax().text_range().end(), format!("\n\n{indent}{impl_}"));
+        },
+    )
+}
+
+fn make_adt_constructor(
+    names: Option<&[ast::Name]>,
+    constructors: Vec<Option<ast::Expr>>,
+    main_field_name: &TokenText<'_>,
+) -> ast::Expr {
+    if let Some(names) = names {
+        let fields = make::record_expr_field_list(names.iter().zip(constructors).map(
+            |(name, initializer)| {
+                make::record_expr_field(make::name_ref(&name.text()), initializer)
+            },
+        ));
+        make::record_expr(make::path_from_text("Self"), fields).into()
+    } else {
+        let arg_list = make::arg_list(constructors.into_iter().map(|expr| {
+            expr.unwrap_or_else(|| make::expr_path(make::path_from_text(main_field_name)))
+        }));
+        make::expr_call(make::expr_path(make::path_from_text("Self")), arg_list).into()
+    }
+}
+
+fn make_constructors(
+    ctx: &AssistContext<'_>,
+    module: hir::Module,
+    types: &[ast::Type],
+) -> Vec<Option<ast::Expr>> {
+    let (db, sema) = (ctx.db(), &ctx.sema);
+    types
+        .iter()
+        .map(|ty| {
+            let ty = sema.resolve_type(ty)?;
+            if ty.is_unit() {
+                return Some(make::expr_tuple([]).into());
+            }
+            let item_in_ns = ModuleDef::Adt(ty.as_adt()?).into();
+            let edition = module.krate().edition(db);
+
+            let ty_path = module.find_path(
+                db,
+                item_for_path_search(db, item_in_ns)?,
+                ctx.config.import_path_config(),
+            )?;
+
+            use_trivial_constructor(db, mod_path_to_ast(&ty_path, edition), &ty, edition)
+        })
+        .collect()
+}
+
+fn get_fields(strukt: &ast::Struct) -> Option<(Option<Vec<ast::Name>>, Vec<ast::Type>)> {
+    Some(match strukt.kind() {
+        ast::StructKind::Unit => return None,
+        ast::StructKind::Record(fields) => {
+            let names = fields.fields().map(|field| field.name()).collect::<Option<_>>()?;
+            let types = fields.fields().map(|field| field.ty()).collect::<Option<_>>()?;
+            (Some(names), types)
+        }
+        ast::StructKind::Tuple(fields) => {
+            (None, fields.fields().map(|field| field.ty()).collect::<Option<_>>()?)
+        }
+    })
+}
+
+fn from_impl_exists(
+    strukt: &ast::Struct,
+    main_field_i: usize,
+    sema: &Semantics<'_, RootDatabase>,
+) -> Option<()> {
+    let db = sema.db;
+    let strukt = sema.to_def(strukt)?;
+    let krate = strukt.krate(db);
+    let from_trait = FamousDefs(sema, krate).core_convert_From()?;
+    let ty = strukt.fields(db).get(main_field_i)?.ty(db);
+
+    strukt.ty(db).impls_trait(db, from_trait, &[ty]).then_some(())
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::tests::{check_assist, check_assist_not_applicable};
+
+    use super::generate_single_field_struct_from;
+
+    #[test]
+    fn works() {
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo {
+                foo: i32,
+            }
+            "#,
+            r#"
+            struct Foo {
+                foo: i32,
+            }
+
+            impl From<i32> for Foo {
+                fn from(foo: i32) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from, phantom_data
+            struct $0Foo {
+                b1: (),
+                b2: core::marker::PhantomData,
+                foo: i32,
+                a1: (),
+                a2: core::marker::PhantomData,
+            }
+            "#,
+            r#"
+            struct Foo {
+                b1: (),
+                b2: core::marker::PhantomData,
+                foo: i32,
+                a1: (),
+                a2: core::marker::PhantomData,
+            }
+
+            impl From<i32> for Foo {
+                fn from(foo: i32) -> Self {
+                    Self { b1: (), b2: core::marker::PhantomData, foo, a1: (), a2: core::marker::PhantomData }
+                }
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn cfgs() {
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            #[cfg(feature = "foo")]
+            #[cfg(test)]
+            struct $0Foo {
+                foo: i32,
+            }
+            "#,
+            r#"
+            #[cfg(feature = "foo")]
+            #[cfg(test)]
+            struct Foo {
+                foo: i32,
+            }
+
+            #[cfg(feature = "foo")]
+            #[cfg(test)]
+            impl From<i32> for Foo {
+                fn from(foo: i32) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn indent() {
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            mod foo {
+                struct $0Foo {
+                    foo: i32,
+                }
+            }
+            "#,
+            r#"
+            mod foo {
+                struct Foo {
+                    foo: i32,
+                }
+
+                impl From<i32> for Foo {
+                    fn from(foo: i32) -> Self {
+                        Self { foo }
+                    }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            mod foo {
+                mod bar {
+                    struct $0Foo {
+                        foo: i32,
+                    }
+                }
+            }
+            "#,
+            r#"
+            mod foo {
+                mod bar {
+                    struct Foo {
+                        foo: i32,
+                    }
+
+                    impl From<i32> for Foo {
+                        fn from(foo: i32) -> Self {
+                            Self { foo }
+                        }
+                    }
+                }
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn where_clause_indent() {
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            mod foo {
+                mod bar {
+                    trait Trait {}
+                    struct $0Foo<T>
+                    where
+                        T: Trait,
+                    {
+                        foo: T,
+                    }
+                }
+            }
+            "#,
+            r#"
+            mod foo {
+                mod bar {
+                    trait Trait {}
+                    struct Foo<T>
+                    where
+                        T: Trait,
+                    {
+                        foo: T,
+                    }
+
+                    impl<T> From<T> for Foo<T>
+                    where
+                        T: Trait,
+                    {
+                        fn from(foo: T) -> Self {
+                            Self { foo }
+                        }
+                    }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            mod foo {
+                mod bar {
+                    trait Trait<const B: bool> {}
+                    struct $0Foo<T>
+                    where
+                        T: Trait<{
+                            true
+                        }>
+                    {
+                        foo: T,
+                    }
+                }
+            }
+            "#,
+            r#"
+            mod foo {
+                mod bar {
+                    trait Trait<const B: bool> {}
+                    struct Foo<T>
+                    where
+                        T: Trait<{
+                            true
+                        }>
+                    {
+                        foo: T,
+                    }
+
+                    impl<T> From<T> for Foo<T>
+                    where
+                        T: Trait<{
+                            true
+                        }>
+                    {
+                        fn from(foo: T) -> Self {
+                            Self { foo }
+                        }
+                    }
+                }
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn generics() {
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T> {
+                foo: T,
+            }
+            "#,
+            r#"
+            struct Foo<T> {
+                foo: T,
+            }
+
+            impl<T> From<T> for Foo<T> {
+                fn from(foo: T) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T: Send> {
+                foo: T,
+            }
+            "#,
+            r#"
+            struct Foo<T: Send> {
+                foo: T,
+            }
+
+            impl<T: Send> From<T> for Foo<T> {
+                fn from(foo: T) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T: Send> where T: Sync,{
+                foo: T,
+            }
+            "#,
+            r#"
+            struct Foo<T: Send> where T: Sync,{
+                foo: T,
+            }
+
+            impl<T: Send> From<T> for Foo<T>
+            where T: Sync,
+            {
+                fn from(foo: T) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T: Send> where T: Sync {
+                foo: T,
+            }
+            "#,
+            r#"
+            struct Foo<T: Send> where T: Sync {
+                foo: T,
+            }
+
+            impl<T: Send> From<T> for Foo<T>
+            where T: Sync
+            {
+                fn from(foo: T) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T: Send> where T: Sync, Self: Send {
+                foo: T,
+            }
+            "#,
+            r#"
+            struct Foo<T: Send> where T: Sync, Self: Send {
+                foo: T,
+            }
+
+            impl<T: Send> From<T> for Foo<T>
+            where T: Sync, Self: Send
+            {
+                fn from(foo: T) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T: Send>
+            where T: Sync, Self: Send
+            {
+                foo: T,
+            }
+            "#,
+            r#"
+            struct Foo<T: Send>
+            where T: Sync, Self: Send
+            {
+                foo: T,
+            }
+
+            impl<T: Send> From<T> for Foo<T>
+            where T: Sync, Self: Send
+            {
+                fn from(foo: T) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T: Send>
+            where T: Sync, Self: Send,
+            {
+                foo: T,
+            }
+            "#,
+            r#"
+            struct Foo<T: Send>
+            where T: Sync, Self: Send,
+            {
+                foo: T,
+            }
+
+            impl<T: Send> From<T> for Foo<T>
+            where T: Sync, Self: Send,
+            {
+                fn from(foo: T) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T: Send>
+            where T: Sync,
+                  Self: Send,
+            {
+                foo: T,
+            }
+            "#,
+            r#"
+            struct Foo<T: Send>
+            where T: Sync,
+                  Self: Send,
+            {
+                foo: T,
+            }
+
+            impl<T: Send> From<T> for Foo<T>
+            where T: Sync,
+                  Self: Send,
+            {
+                fn from(foo: T) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T: Send>
+            where
+                T: Sync,
+                Self: Send,
+            {
+                foo: T,
+            }
+            "#,
+            r#"
+            struct Foo<T: Send>
+            where
+                T: Sync,
+                Self: Send,
+            {
+                foo: T,
+            }
+
+            impl<T: Send> From<T> for Foo<T>
+            where
+                T: Sync,
+                Self: Send,
+            {
+                fn from(foo: T) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T: Send + Sync>
+            where
+                T: Sync,
+                Self: Send,
+            {
+                foo: T,
+            }
+            "#,
+            r#"
+            struct Foo<T: Send + Sync>
+            where
+                T: Sync,
+                Self: Send,
+            {
+                foo: T,
+            }
+
+            impl<T: Send + Sync> From<T> for Foo<T>
+            where
+                T: Sync,
+                Self: Send,
+            {
+                fn from(foo: T) -> Self {
+                    Self { foo }
+                }
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn tuple() {
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo(i32);
+            "#,
+            r#"
+            struct Foo(i32);
+
+            impl From<i32> for Foo {
+                fn from(value: i32) -> Self {
+                    Self(value)
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T>(T);
+            "#,
+            r#"
+            struct Foo<T>(T);
+
+            impl<T> From<T> for Foo<T> {
+                fn from(value: T) -> Self {
+                    Self(value)
+                }
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn trivial() {
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from, phantom_data
+            use core::marker::PhantomData;
+            struct $0Foo(i32, PhantomData<i32>);
+            "#,
+            r#"
+            use core::marker::PhantomData;
+            struct Foo(i32, PhantomData<i32>);
+
+            impl From<i32> for Foo {
+                fn from(value: i32) -> Self {
+                    Self(value, PhantomData)
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from, phantom_data
+            use core::marker::PhantomData;
+            struct $0Foo(i32, PhantomData<()>);
+            "#,
+            r#"
+            use core::marker::PhantomData;
+            struct Foo(i32, PhantomData<()>);
+
+            impl From<i32> for Foo {
+                fn from(value: i32) -> Self {
+                    Self(value, PhantomData)
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from, phantom_data
+            use core::marker::PhantomData;
+            struct $0Foo(PhantomData<()>, i32, PhantomData<()>);
+            "#,
+            r#"
+            use core::marker::PhantomData;
+            struct Foo(PhantomData<()>, i32, PhantomData<()>);
+
+            impl From<i32> for Foo {
+                fn from(value: i32) -> Self {
+                    Self(PhantomData, value, PhantomData)
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from, phantom_data
+            use core::marker::PhantomData;
+            struct $0Foo<T>(PhantomData<T>, i32, PhantomData<()>);
+            "#,
+            r#"
+            use core::marker::PhantomData;
+            struct Foo<T>(PhantomData<T>, i32, PhantomData<()>);
+
+            impl<T> From<i32> for Foo<T> {
+                fn from(value: i32) -> Self {
+                    Self(PhantomData, value, PhantomData)
+                }
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn unit() {
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo(i32, ());
+            "#,
+            r#"
+            struct Foo(i32, ());
+
+            impl From<i32> for Foo {
+                fn from(value: i32) -> Self {
+                    Self(value, ())
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo((), i32, ());
+            "#,
+            r#"
+            struct Foo((), i32, ());
+
+            impl From<i32> for Foo {
+                fn from(value: i32) -> Self {
+                    Self((), value, ())
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo((), (), i32, ());
+            "#,
+            r#"
+            struct Foo((), (), i32, ());
+
+            impl From<i32> for Foo {
+                fn from(value: i32) -> Self {
+                    Self((), (), value, ())
+                }
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn invalid_multiple_main_field() {
+        check_assist_not_applicable(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo(i32, i32);
+            "#,
+        );
+        check_assist_not_applicable(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T>(i32, T);
+            "#,
+        );
+        check_assist_not_applicable(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T>(T, T);
+            "#,
+        );
+        check_assist_not_applicable(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo<T> { foo: T, bar: i32 }
+            "#,
+        );
+        check_assist_not_applicable(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo { foo: i32, bar: i64 }
+            "#,
+        );
+    }
+
+    #[test]
+    fn exists_other_from() {
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo(i32);
+
+            impl From<&i32> for Foo {
+                fn from(value: &i32) -> Self {
+                    todo!()
+                }
+            }
+            "#,
+            r#"
+            struct Foo(i32);
+
+            impl From<i32> for Foo {
+                fn from(value: i32) -> Self {
+                    Self(value)
+                }
+            }
+
+            impl From<&i32> for Foo {
+                fn from(value: &i32) -> Self {
+                    todo!()
+                }
+            }
+            "#,
+        );
+        check_assist(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo(i32);
+
+            type X = i32;
+
+            impl From<&X> for Foo {
+                fn from(value: &X) -> Self {
+                    todo!()
+                }
+            }
+            "#,
+            r#"
+            struct Foo(i32);
+
+            impl From<i32> for Foo {
+                fn from(value: i32) -> Self {
+                    Self(value)
+                }
+            }
+
+            type X = i32;
+
+            impl From<&X> for Foo {
+                fn from(value: &X) -> Self {
+                    todo!()
+                }
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn exists_from() {
+        check_assist_not_applicable(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo(i32);
+
+            impl From<i32> for Foo {
+                fn from(_: i32) -> Self {
+                    todo!()
+                }
+            }
+            "#,
+        );
+        check_assist_not_applicable(
+            generate_single_field_struct_from,
+            r#"
+            //- minicore: from
+            struct $0Foo(i32);
+
+            type X = i32;
+
+            impl From<X> for Foo {
+                fn from(_: X) -> Self {
+                    todo!()
+                }
+            }
+            "#,
+        );
+    }
+}
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/pull_assignment_up.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/pull_assignment_up.rs
index 5f626d29571..1b0c3139353 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/pull_assignment_up.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/pull_assignment_up.rs
@@ -1,7 +1,8 @@
 use syntax::{
     AstNode,
-    ast::{self, make},
-    ted,
+    algo::find_node_at_range,
+    ast::{self, syntax_factory::SyntaxFactory},
+    syntax_editor::SyntaxEditor,
 };
 
 use crate::{
@@ -66,33 +67,51 @@ pub(crate) fn pull_assignment_up(acc: &mut Assists, ctx: &AssistContext<'_>) ->
             return None;
         }
     }
-
+    let target = tgt.syntax().text_range();
+
+    let edit_tgt = tgt.syntax().clone_subtree();
+    let assignments: Vec<_> = collector
+        .assignments
+        .into_iter()
+        .filter_map(|(stmt, rhs)| {
+            Some((
+                find_node_at_range::<ast::BinExpr>(
+                    &edit_tgt,
+                    stmt.syntax().text_range() - target.start(),
+                )?,
+                find_node_at_range::<ast::Expr>(
+                    &edit_tgt,
+                    rhs.syntax().text_range() - target.start(),
+                )?,
+            ))
+        })
+        .collect();
+
+    let mut editor = SyntaxEditor::new(edit_tgt);
+    for (stmt, rhs) in assignments {
+        let mut stmt = stmt.syntax().clone();
+        if let Some(parent) = stmt.parent() {
+            if ast::ExprStmt::cast(parent.clone()).is_some() {
+                stmt = parent.clone();
+            }
+        }
+        editor.replace(stmt, rhs.syntax());
+    }
+    let new_tgt_root = editor.finish().new_root().clone();
+    let new_tgt = ast::Expr::cast(new_tgt_root)?;
     acc.add(
         AssistId::refactor_extract("pull_assignment_up"),
         "Pull assignment up",
-        tgt.syntax().text_range(),
+        target,
         move |edit| {
-            let assignments: Vec<_> = collector
-                .assignments
-                .into_iter()
-                .map(|(stmt, rhs)| (edit.make_mut(stmt), rhs.clone_for_update()))
-                .collect();
-
-            let tgt = edit.make_mut(tgt);
-
-            for (stmt, rhs) in assignments {
-                let mut stmt = stmt.syntax().clone();
-                if let Some(parent) = stmt.parent() {
-                    if ast::ExprStmt::cast(parent.clone()).is_some() {
-                        stmt = parent.clone();
-                    }
-                }
-                ted::replace(stmt, rhs.syntax());
-            }
-            let assign_expr = make::expr_assignment(collector.common_lhs, tgt.clone());
-            let assign_stmt = make::expr_stmt(assign_expr);
-
-            ted::replace(tgt.syntax(), assign_stmt.syntax().clone_for_update());
+            let make = SyntaxFactory::with_mappings();
+            let mut editor = edit.make_editor(tgt.syntax());
+            let assign_expr = make.expr_assignment(collector.common_lhs, new_tgt.clone());
+            let assign_stmt = make.expr_stmt(assign_expr.into());
+
+            editor.replace(tgt.syntax(), assign_stmt.syntax());
+            editor.add_mappings(make.finish_with_mappings());
+            edit.add_file_edits(ctx.vfs_file_id(), editor);
         },
     )
 }
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/remove_dbg.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/remove_dbg.rs
index 52ace03f3cf..9356d02706c 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/remove_dbg.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/remove_dbg.rs
@@ -1,8 +1,9 @@
 use itertools::Itertools;
 use syntax::{
-    Edition, NodeOrToken, SyntaxElement, T, TextRange, TextSize,
-    ast::{self, AstNode, AstToken, make},
-    match_ast, ted,
+    Edition, NodeOrToken, SyntaxNode, SyntaxToken, T,
+    ast::{self, AstNode, make},
+    match_ast,
+    syntax_editor::{Position, SyntaxEditor},
 };
 
 use crate::{AssistContext, AssistId, Assists};
@@ -40,21 +41,23 @@ pub(crate) fn remove_dbg(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<(
 
     let replacements =
         macro_calls.into_iter().filter_map(compute_dbg_replacement).collect::<Vec<_>>();
-
-    acc.add(
-        AssistId::quick_fix("remove_dbg"),
-        "Remove dbg!()",
-        replacements.iter().map(|&(range, _)| range).reduce(|acc, range| acc.cover(range))?,
-        |builder| {
-            for (range, expr) in replacements {
-                if let Some(expr) = expr {
-                    builder.replace(range, expr.to_string());
-                } else {
-                    builder.delete(range);
-                }
+    let target = replacements
+        .iter()
+        .flat_map(|(node_or_token, _)| node_or_token.iter())
+        .map(|t| t.text_range())
+        .reduce(|acc, range| acc.cover(range))?;
+    acc.add(AssistId::quick_fix("remove_dbg"), "Remove dbg!()", target, |builder| {
+        let mut editor = builder.make_editor(ctx.source_file().syntax());
+        for (range, expr) in replacements {
+            if let Some(expr) = expr {
+                editor.insert(Position::before(range[0].clone()), expr.syntax().clone_for_update());
+            }
+            for node_or_token in range {
+                editor.delete(node_or_token);
             }
-        },
-    )
+        }
+        builder.add_file_edits(ctx.vfs_file_id(), editor);
+    })
 }
 
 /// Returns `None` when either
@@ -63,7 +66,9 @@ pub(crate) fn remove_dbg(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<(
 /// - (`macro_expr` has no parent - is that possible?)
 ///
 /// Returns `Some(_, None)` when the macro call should just be removed.
-fn compute_dbg_replacement(macro_expr: ast::MacroExpr) -> Option<(TextRange, Option<ast::Expr>)> {
+fn compute_dbg_replacement(
+    macro_expr: ast::MacroExpr,
+) -> Option<(Vec<NodeOrToken<SyntaxNode, SyntaxToken>>, Option<ast::Expr>)> {
     let macro_call = macro_expr.macro_call()?;
     let tt = macro_call.token_tree()?;
     let r_delim = NodeOrToken::Token(tt.right_delimiter_token()?);
@@ -88,22 +93,22 @@ fn compute_dbg_replacement(macro_expr: ast::MacroExpr) -> Option<(TextRange, Opt
             match_ast! {
                 match parent {
                     ast::StmtList(_) => {
-                        let range = macro_expr.syntax().text_range();
-                        let range = match whitespace_start(macro_expr.syntax().prev_sibling_or_token()) {
-                            Some(start) => range.cover_offset(start),
-                            None => range,
-                        };
-                        (range, None)
+                        let mut replace = vec![macro_expr.syntax().clone().into()];
+                        if let Some(prev_sibling) = macro_expr.syntax().prev_sibling_or_token()
+                            && prev_sibling.kind() == syntax::SyntaxKind::WHITESPACE {
+                                replace.push(prev_sibling);
+                        }
+                        (replace, None)
                     },
                     ast::ExprStmt(it) => {
-                        let range = it.syntax().text_range();
-                        let range = match whitespace_start(it.syntax().prev_sibling_or_token()) {
-                            Some(start) => range.cover_offset(start),
-                            None => range,
-                        };
-                        (range, None)
+                        let mut replace = vec![it.syntax().clone().into()];
+                        if let Some(prev_sibling) = it.syntax().prev_sibling_or_token()
+                            && prev_sibling.kind() == syntax::SyntaxKind::WHITESPACE {
+                                replace.push(prev_sibling);
+                        }
+                        (replace, None)
                     },
-                    _ => (macro_call.syntax().text_range(), Some(make::ext::expr_unit())),
+                    _ => (vec![macro_call.syntax().clone().into()], Some(make::ext::expr_unit())),
                 }
             }
         }
@@ -147,13 +152,13 @@ fn compute_dbg_replacement(macro_expr: ast::MacroExpr) -> Option<(TextRange, Opt
             };
             let expr = replace_nested_dbgs(expr.clone());
             let expr = if wrap { make::expr_paren(expr).into() } else { expr.clone_subtree() };
-            (macro_call.syntax().text_range(), Some(expr))
+            (vec![macro_call.syntax().clone().into()], Some(expr))
         }
         // dbg!(expr0, expr1, ...)
         exprs => {
             let exprs = exprs.iter().cloned().map(replace_nested_dbgs);
             let expr = make::expr_tuple(exprs);
-            (macro_call.syntax().text_range(), Some(expr.into()))
+            (vec![macro_call.syntax().clone().into()], Some(expr.into()))
         }
     })
 }
@@ -178,8 +183,8 @@ fn replace_nested_dbgs(expanded: ast::Expr) -> ast::Expr {
         return replaced;
     }
 
-    let expanded = expanded.clone_for_update();
-
+    let expanded = expanded.clone_subtree();
+    let mut editor = SyntaxEditor::new(expanded.syntax().clone());
     // We need to collect to avoid mutation during traversal.
     let macro_exprs: Vec<_> =
         expanded.syntax().descendants().filter_map(ast::MacroExpr::cast).collect();
@@ -191,17 +196,13 @@ fn replace_nested_dbgs(expanded: ast::Expr) -> ast::Expr {
         };
 
         if let Some(expr) = expr_opt {
-            ted::replace(mac.syntax(), expr.syntax().clone_for_update());
+            editor.replace(mac.syntax(), expr.syntax().clone_for_update());
         } else {
-            ted::remove(mac.syntax());
+            editor.delete(mac.syntax());
         }
     }
-
-    expanded
-}
-
-fn whitespace_start(it: Option<SyntaxElement>) -> Option<TextSize> {
-    Some(it?.into_token().and_then(ast::Whitespace::cast)?.syntax().text_range().start())
+    let expanded_syntax = editor.finish().new_root().clone();
+    ast::Expr::cast(expanded_syntax).unwrap()
 }
 
 #[cfg(test)]
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_is_method_with_if_let_method.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_is_method_with_if_let_method.rs
index 62914ee7f38..5ef8ba46b9e 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_is_method_with_if_let_method.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/replace_is_method_with_if_let_method.rs
@@ -64,13 +64,12 @@ pub(crate) fn replace_is_method_with_if_let_method(
                     let pat = make.tuple_struct_pat(make.ident_path(text), [var_pat.into()]);
                     let let_expr = make.expr_let(pat.into(), receiver);
 
-                    if let Some(cap) = ctx.config.snippet_cap {
-                        if let Some(ast::Pat::TupleStructPat(pat)) = let_expr.pat() {
-                            if let Some(first_var) = pat.fields().next() {
-                                let placeholder = edit.make_placeholder_snippet(cap);
-                                editor.add_annotation(first_var.syntax(), placeholder);
-                            }
-                        }
+                    if let Some(cap) = ctx.config.snippet_cap
+                        && let Some(ast::Pat::TupleStructPat(pat)) = let_expr.pat()
+                        && let Some(first_var) = pat.fields().next()
+                    {
+                        let placeholder = edit.make_placeholder_snippet(cap);
+                        editor.add_annotation(first_var.syntax(), placeholder);
                     }
 
                     editor.replace(call_expr.syntax(), let_expr.syntax());
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs b/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs
index c2604432032..cde0d875e0d 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/lib.rs
@@ -172,6 +172,7 @@ mod handlers {
     mod generate_is_empty_from_len;
     mod generate_mut_trait_impl;
     mod generate_new;
+    mod generate_single_field_struct_from;
     mod generate_trait_from_impl;
     mod inline_call;
     mod inline_const_as_literal;
@@ -305,6 +306,7 @@ mod handlers {
             generate_mut_trait_impl::generate_mut_trait_impl,
             generate_new::generate_new,
             generate_trait_from_impl::generate_trait_from_impl,
+            generate_single_field_struct_from::generate_single_field_struct_from,
             inline_call::inline_call,
             inline_call::inline_into_callers,
             inline_const_as_literal::inline_const_as_literal,
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs b/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs
index 72f7195cbd7..fc1c6928ff3 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/tests/generated.rs
@@ -1933,7 +1933,7 @@ pub enum Axis { X = 0, Y = 1, Z = 2 }
 
 $0impl<T> core::ops::IndexMut<Axis> for [T; 3] {
     fn index_mut(&mut self, index: Axis) -> &mut Self::Output {
-        &self[index as usize]
+        &mut self[index as usize]
     }
 }
 
@@ -1995,6 +1995,34 @@ impl Person {
 }
 
 #[test]
+fn doctest_generate_single_field_struct_from() {
+    check_doc_test(
+        "generate_single_field_struct_from",
+        r#####"
+//- minicore: from, phantom_data
+use core::marker::PhantomData;
+struct $0Foo<T> {
+    id: i32,
+    _phantom_data: PhantomData<T>,
+}
+"#####,
+        r#####"
+use core::marker::PhantomData;
+struct Foo<T> {
+    id: i32,
+    _phantom_data: PhantomData<T>,
+}
+
+impl<T> From<i32> for Foo<T> {
+    fn from(id: i32) -> Self {
+        Self { id, _phantom_data: PhantomData }
+    }
+}
+"#####,
+    )
+}
+
+#[test]
 fn doctest_generate_trait_from_impl() {
     check_doc_test(
         "generate_trait_from_impl",
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs b/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs
index 87a4c2ef758..fbce1d31eae 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs
@@ -567,6 +567,7 @@ pub(crate) fn generate_impl_text(adt: &ast::Adt, code: &str) -> String {
 ///
 /// This is useful for traits like `PartialEq`, since `impl<T> PartialEq for U<T>` often requires `T: PartialEq`.
 // FIXME: migrate remaining uses to `generate_trait_impl`
+#[allow(dead_code)]
 pub(crate) fn generate_trait_impl_text(adt: &ast::Adt, trait_text: &str, code: &str) -> String {
     generate_impl_text_inner(adt, Some(trait_text), true, code)
 }
@@ -594,12 +595,10 @@ fn generate_impl_text_inner(
     let generic_params = adt.generic_param_list().map(|generic_params| {
         let lifetime_params =
             generic_params.lifetime_params().map(ast::GenericParam::LifetimeParam);
-        let ty_or_const_params = generic_params.type_or_const_params().map(|param| {
-            match param {
+        let ty_or_const_params = generic_params.type_or_const_params().filter_map(|param| {
+            let param = match param {
                 ast::TypeOrConstParam::Type(param) => {
-                    let param = param.clone_for_update();
                     // remove defaults since they can't be specified in impls
-                    param.remove_default();
                     let mut bounds =
                         param.type_bound_list().map_or_else(Vec::new, |it| it.bounds().collect());
                     if let Some(trait_) = trait_text {
@@ -610,17 +609,16 @@ fn generate_impl_text_inner(
                         }
                     };
                     // `{ty_param}: {bounds}`
-                    let param =
-                        make::type_param(param.name().unwrap(), make::type_bound_list(bounds));
+                    let param = make::type_param(param.name()?, make::type_bound_list(bounds));
                     ast::GenericParam::TypeParam(param)
                 }
                 ast::TypeOrConstParam::Const(param) => {
-                    let param = param.clone_for_update();
                     // remove defaults since they can't be specified in impls
-                    param.remove_default();
+                    let param = make::const_param(param.name()?, param.ty()?);
                     ast::GenericParam::ConstParam(param)
                 }
-            }
+            };
+            Some(param)
         });
 
         make::generic_param_list(itertools::chain(lifetime_params, ty_or_const_params))
@@ -695,12 +693,10 @@ fn generate_impl_inner(
     let generic_params = adt.generic_param_list().map(|generic_params| {
         let lifetime_params =
             generic_params.lifetime_params().map(ast::GenericParam::LifetimeParam);
-        let ty_or_const_params = generic_params.type_or_const_params().map(|param| {
-            match param {
+        let ty_or_const_params = generic_params.type_or_const_params().filter_map(|param| {
+            let param = match param {
                 ast::TypeOrConstParam::Type(param) => {
-                    let param = param.clone_for_update();
                     // remove defaults since they can't be specified in impls
-                    param.remove_default();
                     let mut bounds =
                         param.type_bound_list().map_or_else(Vec::new, |it| it.bounds().collect());
                     if let Some(trait_) = &trait_ {
@@ -711,17 +707,16 @@ fn generate_impl_inner(
                         }
                     };
                     // `{ty_param}: {bounds}`
-                    let param =
-                        make::type_param(param.name().unwrap(), make::type_bound_list(bounds));
+                    let param = make::type_param(param.name()?, make::type_bound_list(bounds));
                     ast::GenericParam::TypeParam(param)
                 }
                 ast::TypeOrConstParam::Const(param) => {
-                    let param = param.clone_for_update();
                     // remove defaults since they can't be specified in impls
-                    param.remove_default();
+                    let param = make::const_param(param.name()?, param.ty()?);
                     ast::GenericParam::ConstParam(param)
                 }
-            }
+            };
+            Some(param)
         });
 
         make::generic_param_list(itertools::chain(lifetime_params, ty_or_const_params))
@@ -749,16 +744,23 @@ fn generate_impl_inner(
     .clone_for_update();
 
     // Copy any cfg attrs from the original adt
-    let cfg_attrs = adt
-        .attrs()
-        .filter(|attr| attr.as_simple_call().map(|(name, _arg)| name == "cfg").unwrap_or(false));
-    for attr in cfg_attrs {
-        impl_.add_attr(attr.clone_for_update());
-    }
+    add_cfg_attrs_to(adt, &impl_);
 
     impl_
 }
 
+pub(crate) fn add_cfg_attrs_to<T, U>(from: &T, to: &U)
+where
+    T: HasAttrs,
+    U: AttrsOwnerEdit,
+{
+    let cfg_attrs =
+        from.attrs().filter(|attr| attr.as_simple_call().is_some_and(|(name, _arg)| name == "cfg"));
+    for attr in cfg_attrs {
+        to.add_attr(attr.clone_for_update());
+    }
+}
+
 pub(crate) fn add_method_to_adt(
     builder: &mut SourceChangeBuilder,
     adt: &ast::Adt,
diff --git a/src/tools/rust-analyzer/crates/ide-completion/src/completions/item_list/trait_impl.rs b/src/tools/rust-analyzer/crates/ide-completion/src/completions/item_list/trait_impl.rs
index 092219a058a..975c2f02259 100644
--- a/src/tools/rust-analyzer/crates/ide-completion/src/completions/item_list/trait_impl.rs
+++ b/src/tools/rust-analyzer/crates/ide-completion/src/completions/item_list/trait_impl.rs
@@ -37,6 +37,7 @@ use ide_db::{
     SymbolKind, documentation::HasDocs, path_transform::PathTransform,
     syntax_helpers::prettify_macro_expansion, traits::get_missing_assoc_items,
 };
+use syntax::ast::HasGenericParams;
 use syntax::{
     AstNode, SmolStr, SyntaxElement, SyntaxKind, T, TextRange, ToSmolStr,
     ast::{self, HasGenericArgs, HasTypeBounds, edit_in_place::AttrsOwnerEdit, make},
@@ -390,6 +391,12 @@ fn add_type_alias_impl(
             } else if let Some(end) = transformed_ty.eq_token().map(|tok| tok.text_range().start())
             {
                 end
+            } else if let Some(end) = transformed_ty
+                .where_clause()
+                .and_then(|wc| wc.where_token())
+                .map(|tok| tok.text_range().start())
+            {
+                end
             } else if let Some(end) =
                 transformed_ty.semicolon_token().map(|tok| tok.text_range().start())
             {
@@ -400,17 +407,29 @@ fn add_type_alias_impl(
 
             let len = end - start;
             let mut decl = transformed_ty.syntax().text().slice(..len).to_string();
-            if !decl.ends_with(' ') {
-                decl.push(' ');
-            }
-            decl.push_str("= ");
+            decl.truncate(decl.trim_end().len());
+            decl.push_str(" = ");
+
+            let wc = transformed_ty
+                .where_clause()
+                .map(|wc| {
+                    let ws = wc
+                        .where_token()
+                        .and_then(|it| it.prev_token())
+                        .filter(|token| token.kind() == SyntaxKind::WHITESPACE)
+                        .map(|token| token.to_string())
+                        .unwrap_or_else(|| " ".into());
+                    format!("{ws}{wc}")
+                })
+                .unwrap_or_default();
 
             match ctx.config.snippet_cap {
                 Some(cap) => {
-                    let snippet = format!("{decl}$0;");
+                    let snippet = format!("{decl}$0{wc};");
                     item.snippet_edit(cap, TextEdit::replace(replacement_range, snippet));
                 }
                 None => {
+                    decl.push_str(&wc);
                     item.text_edit(TextEdit::replace(replacement_range, decl));
                 }
             };
@@ -1440,6 +1459,30 @@ impl<'b> Tr<'b> for () {
 "#,
         );
     }
+    #[test]
+    fn includes_where_clause() {
+        check_edit(
+            "type Ty",
+            r#"
+trait Tr {
+    type Ty where Self: Copy;
+}
+
+impl Tr for () {
+    $0
+}
+"#,
+            r#"
+trait Tr {
+    type Ty where Self: Copy;
+}
+
+impl Tr for () {
+    type Ty = $0 where Self: Copy;
+}
+"#,
+        );
+    }
 
     #[test]
     fn strips_comments() {
diff --git a/src/tools/rust-analyzer/crates/ide-completion/src/tests/item_list.rs b/src/tools/rust-analyzer/crates/ide-completion/src/tests/item_list.rs
index 179d6693602..ac32649d4ff 100644
--- a/src/tools/rust-analyzer/crates/ide-completion/src/tests/item_list.rs
+++ b/src/tools/rust-analyzer/crates/ide-completion/src/tests/item_list.rs
@@ -458,6 +458,33 @@ type O = $0;
         r"
 struct A;
 trait B {
+type O<'a>
+where
+Self: 'a;
+}
+impl B for A {
+$0
+}
+",
+        r#"
+struct A;
+trait B {
+type O<'a>
+where
+Self: 'a;
+}
+impl B for A {
+type O<'a> = $0
+where
+Self: 'a;
+}
+"#,
+    );
+    check_edit(
+        "type O",
+        r"
+struct A;
+trait B {
 type O: ?Sized = u32;
 }
 impl B for A {
diff --git a/src/tools/rust-analyzer/crates/ide-db/src/generated/lints.rs b/src/tools/rust-analyzer/crates/ide-db/src/generated/lints.rs
index de8a42979bb..f9eb44d03ab 100644
--- a/src/tools/rust-analyzer/crates/ide-db/src/generated/lints.rs
+++ b/src/tools/rust-analyzer/crates/ide-db/src/generated/lints.rs
@@ -4711,9 +4711,9 @@ The tracking issue for this feature is: [#133668]
         label: "const_trait_impl",
         description: r##"# `const_trait_impl`
 
-The tracking issue for this feature is: [#67792]
+The tracking issue for this feature is: [#143874]
 
-[#67792]: https://github.com/rust-lang/rust/issues/67792
+[#143874]: https://github.com/rust-lang/rust/issues/143874
 
 ------------------------
 "##,
diff --git a/src/tools/rust-analyzer/crates/ide-db/src/search.rs b/src/tools/rust-analyzer/crates/ide-db/src/search.rs
index 4efb83ba323..9cf0bcf9190 100644
--- a/src/tools/rust-analyzer/crates/ide-db/src/search.rs
+++ b/src/tools/rust-analyzer/crates/ide-db/src/search.rs
@@ -531,7 +531,7 @@ impl<'a> FindUsages<'a> {
         node.token_at_offset(offset)
             .find(|it| {
                 // `name` is stripped of raw ident prefix. See the comment on name retrieval below.
-                it.text().trim_start_matches("r#") == name
+                it.text().trim_start_matches('\'').trim_start_matches("r#") == name
             })
             .into_iter()
             .flat_map(move |token| {
@@ -938,7 +938,12 @@ impl<'a> FindUsages<'a> {
                     })
                 };
                 // We need to search without the `r#`, hence `as_str` access.
-                self.def.name(sema.db).or_else(self_kw_refs).map(|it| it.as_str().to_smolstr())
+                // We strip `'` from lifetimes and labels as otherwise they may not match with raw-escaped ones,
+                // e.g. if we search `'foo` we won't find `'r#foo`.
+                self.def
+                    .name(sema.db)
+                    .or_else(self_kw_refs)
+                    .map(|it| it.as_str().trim_start_matches('\'').to_smolstr())
             }
         };
         let name = match &name {
diff --git a/src/tools/rust-analyzer/crates/ide-db/src/test_data/test_symbol_index_collection.txt b/src/tools/rust-analyzer/crates/ide-db/src/test_data/test_symbol_index_collection.txt
index de046e70c67..973256c470f 100644
--- a/src/tools/rust-analyzer/crates/ide-db/src/test_data/test_symbol_index_collection.txt
+++ b/src/tools/rust-analyzer/crates/ide-db/src/test_data/test_symbol_index_collection.txt
@@ -11,6 +11,40 @@
         },
         [
             FileSymbol {
+                name: "A",
+                def: Variant(
+                    Variant {
+                        id: EnumVariantId(
+                            7800,
+                        ),
+                    },
+                ),
+                loc: DeclarationLocation {
+                    hir_file_id: FileId(
+                        EditionedFileId(
+                            Id(2000),
+                        ),
+                    ),
+                    ptr: SyntaxNodePtr {
+                        kind: VARIANT,
+                        range: 201..202,
+                    },
+                    name_ptr: AstPtr(
+                        SyntaxNodePtr {
+                            kind: NAME,
+                            range: 201..202,
+                        },
+                    ),
+                },
+                container_name: Some(
+                    "Enum",
+                ),
+                is_alias: false,
+                is_assoc: true,
+                is_import: false,
+                do_not_complete: Yes,
+            },
+            FileSymbol {
                 name: "Alias",
                 def: TypeAlias(
                     TypeAlias {
@@ -43,6 +77,40 @@
                 do_not_complete: Yes,
             },
             FileSymbol {
+                name: "B",
+                def: Variant(
+                    Variant {
+                        id: EnumVariantId(
+                            7801,
+                        ),
+                    },
+                ),
+                loc: DeclarationLocation {
+                    hir_file_id: FileId(
+                        EditionedFileId(
+                            Id(2000),
+                        ),
+                    ),
+                    ptr: SyntaxNodePtr {
+                        kind: VARIANT,
+                        range: 204..205,
+                    },
+                    name_ptr: AstPtr(
+                        SyntaxNodePtr {
+                            kind: NAME,
+                            range: 204..205,
+                        },
+                    ),
+                },
+                container_name: Some(
+                    "Enum",
+                ),
+                is_alias: false,
+                is_assoc: true,
+                is_import: false,
+                do_not_complete: Yes,
+            },
+            FileSymbol {
                 name: "CONST",
                 def: Const(
                     Const {
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/incorrect_generics_len.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/incorrect_generics_len.rs
index 06f35759420..7402133f747 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/incorrect_generics_len.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/incorrect_generics_len.rs
@@ -183,4 +183,28 @@ fn main() {
 "#,
         );
     }
+
+    #[test]
+    fn generic_assoc_type_infer_lifetime_in_expr_position() {
+        check_diagnostics(
+            r#"
+//- minicore: sized
+struct Player;
+
+struct Foo<'c, C> {
+    _v: &'c C,
+}
+trait WithSignals: Sized {
+    type SignalCollection<'c, C>;
+    fn __signals_from_external(&self) -> Self::SignalCollection<'_, Self>;
+}
+impl WithSignals for Player {
+    type SignalCollection<'c, C> = Foo<'c, C>;
+    fn __signals_from_external(&self) -> Self::SignalCollection<'_, Self> {
+        Self::SignalCollection { _v: self }
+    }
+}
+        "#,
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/missing_unsafe.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/missing_unsafe.rs
index d8f6e813d80..17caf630182 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/missing_unsafe.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/missing_unsafe.rs
@@ -983,4 +983,19 @@ fn test() {
             "#,
         );
     }
+
+    #[test]
+    fn naked_asm_is_safe() {
+        check_diagnostics(
+            r#"
+#[rustc_builtin_macro]
+macro_rules! naked_asm { () => {} }
+
+#[unsafe(naked)]
+extern "C" fn naked() {
+    naked_asm!("");
+}
+        "#,
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide/src/doc_links.rs b/src/tools/rust-analyzer/crates/ide/src/doc_links.rs
index f58202a4213..a5d9a10d2e5 100644
--- a/src/tools/rust-analyzer/crates/ide/src/doc_links.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/doc_links.rs
@@ -505,7 +505,7 @@ fn map_links<'e>(
         Event::End(Tag::Link(link_type, target, _)) => {
             in_link = false;
             Event::End(Tag::Link(
-                end_link_type.unwrap_or(link_type),
+                end_link_type.take().unwrap_or(link_type),
                 end_link_target.take().unwrap_or(target),
                 CowStr::Borrowed(""),
             ))
@@ -514,7 +514,7 @@ fn map_links<'e>(
             let (link_type, link_target_s, link_name) =
                 callback(&end_link_target.take().unwrap(), &s, range, end_link_type.unwrap());
             end_link_target = Some(CowStr::Boxed(link_target_s.into()));
-            if !matches!(end_link_type, Some(LinkType::Autolink)) {
+            if !matches!(end_link_type, Some(LinkType::Autolink)) && link_type.is_some() {
                 end_link_type = link_type;
             }
             Event::Text(CowStr::Boxed(link_name.into()))
@@ -523,7 +523,7 @@ fn map_links<'e>(
             let (link_type, link_target_s, link_name) =
                 callback(&end_link_target.take().unwrap(), &s, range, end_link_type.unwrap());
             end_link_target = Some(CowStr::Boxed(link_target_s.into()));
-            if !matches!(end_link_type, Some(LinkType::Autolink)) {
+            if !matches!(end_link_type, Some(LinkType::Autolink)) && link_type.is_some() {
                 end_link_type = link_type;
             }
             Event::Code(CowStr::Boxed(link_name.into()))
diff --git a/src/tools/rust-analyzer/crates/ide/src/folding_ranges.rs b/src/tools/rust-analyzer/crates/ide/src/folding_ranges.rs
index 9bd8504733a..698fd147789 100755
--- a/src/tools/rust-analyzer/crates/ide/src/folding_ranges.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/folding_ranges.rs
@@ -23,6 +23,7 @@ pub enum FoldKind {
     WhereClause,
     ReturnType,
     MatchArm,
+    Function,
     // region: item runs
     Modules,
     Consts,
@@ -59,6 +60,31 @@ pub(crate) fn folding_ranges(file: &SourceFile) -> Vec<Fold> {
                 NodeOrToken::Token(token) => token.text().contains('\n'),
             };
             if is_multiline {
+                // for the func with multiline param list
+                if matches!(element.kind(), FN) {
+                    if let NodeOrToken::Node(node) = &element {
+                        if let Some(fn_node) = ast::Fn::cast(node.clone()) {
+                            if !fn_node
+                                .param_list()
+                                .map(|param_list| param_list.syntax().text().contains_char('\n'))
+                                .unwrap_or(false)
+                            {
+                                continue;
+                            }
+
+                            if fn_node.body().is_some() {
+                                res.push(Fold {
+                                    range: TextRange::new(
+                                        node.text_range().start(),
+                                        node.text_range().end(),
+                                    ),
+                                    kind: FoldKind::Function,
+                                });
+                                continue;
+                            }
+                        }
+                    }
+                }
                 res.push(Fold { range: element.text_range(), kind });
                 continue;
             }
@@ -152,6 +178,7 @@ fn fold_kind(kind: SyntaxKind) -> Option<FoldKind> {
         ARG_LIST | PARAM_LIST | GENERIC_ARG_LIST | GENERIC_PARAM_LIST => Some(FoldKind::ArgList),
         ARRAY_EXPR => Some(FoldKind::Array),
         RET_TYPE => Some(FoldKind::ReturnType),
+        FN => Some(FoldKind::Function),
         WHERE_CLAUSE => Some(FoldKind::WhereClause),
         ASSOC_ITEM_LIST
         | RECORD_FIELD_LIST
@@ -291,6 +318,7 @@ mod tests {
 
     use super::*;
 
+    #[track_caller]
     fn check(#[rust_analyzer::rust_fixture] ra_fixture: &str) {
         let (ranges, text) = extract_tags(ra_fixture, "fold");
 
@@ -322,6 +350,7 @@ mod tests {
                 FoldKind::WhereClause => "whereclause",
                 FoldKind::ReturnType => "returntype",
                 FoldKind::MatchArm => "matcharm",
+                FoldKind::Function => "function",
                 FoldKind::TraitAliases => "traitaliases",
                 FoldKind::ExternCrates => "externcrates",
             };
@@ -330,6 +359,23 @@ mod tests {
     }
 
     #[test]
+    fn test_fold_func_with_multiline_param_list() {
+        check(
+            r#"
+<fold function>fn func<fold arglist>(
+    a: i32,
+    b: i32,
+    c: i32,
+)</fold> <fold block>{
+
+
+
+}</fold></fold>
+"#,
+        );
+    }
+
+    #[test]
     fn test_fold_comments() {
         check(
             r#"
@@ -541,10 +587,10 @@ const _: S = S <fold block>{
     fn fold_multiline_params() {
         check(
             r#"
-fn foo<fold arglist>(
+<fold function>fn foo<fold arglist>(
     x: i32,
     y: String,
-)</fold> {}
+)</fold> {}</fold>
 "#,
         )
     }
diff --git a/src/tools/rust-analyzer/crates/ide/src/hover/tests.rs b/src/tools/rust-analyzer/crates/ide/src/hover/tests.rs
index f63499aa0fd..c5480217a91 100644
--- a/src/tools/rust-analyzer/crates/ide/src/hover/tests.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/hover/tests.rs
@@ -10958,3 +10958,68 @@ fn bar$0() -> Foo {
         "#]],
     );
 }
+
+#[test]
+fn regression_20190() {
+    check(
+        r#"
+struct Foo;
+
+/// [`foo` bar](Foo).
+fn has_docs$0() {}
+    "#,
+        expect![[r#"
+            *has_docs*
+
+            ```rust
+            ra_test_fixture
+            ```
+
+            ```rust
+            fn has_docs()
+            ```
+
+            ---
+
+            [`foo` bar](https://docs.rs/ra_test_fixture/*/ra_test_fixture/struct.Foo.html).
+        "#]],
+    );
+}
+
+#[test]
+fn regression_20225() {
+    check(
+        r#"
+//- minicore: coerce_unsized
+trait Trait {
+    type Type<'a, T: ?Sized + 'a>;
+}
+
+enum Borrowed {}
+
+impl Trait for Borrowed {
+    type Type<'a, T: ?Sized + 'a> = &'a T;
+}
+
+enum Enum<'a, T: Trait + 'a> {
+    Variant1(T::Type<'a, [Enum<'a, T>]>),
+    Variant2,
+}
+
+impl Enum<'_, Borrowed> {
+    const CONSTANT$0: Self = Self::Variant1(&[Self::Variant2]);
+}
+    "#,
+        expect![[r#"
+            *CONSTANT*
+
+            ```rust
+            ra_test_fixture::Enum
+            ```
+
+            ```rust
+            const CONSTANT: Self = Variant1(&[Variant2])
+            ```
+        "#]],
+    );
+}
diff --git a/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implicit_drop.rs b/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implicit_drop.rs
index bf4688e9d82..d0539abe282 100644
--- a/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implicit_drop.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implicit_drop.rs
@@ -92,7 +92,7 @@ pub(super) fn hints(
                 },
                 MirSpan::Unknown => continue,
             };
-            let binding = &hir.bindings[binding_idx];
+            let binding = &hir[binding_idx];
             let name = binding.name.display_no_db(display_target.edition).to_smolstr();
             if name.starts_with("<ra@") {
                 continue; // Ignore desugared variables
diff --git a/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implied_dyn_trait.rs b/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implied_dyn_trait.rs
index cd01c075832..0da1785234a 100644
--- a/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implied_dyn_trait.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/inlay_hints/implied_dyn_trait.rs
@@ -17,8 +17,12 @@ pub(super) fn hints(
     let parent = path.syntax().parent()?;
     let range = match path {
         Either::Left(path) => {
-            let paren =
-                parent.ancestors().take_while(|it| ast::ParenType::can_cast(it.kind())).last();
+            let paren = parent
+                .ancestors()
+                .take_while(|it| {
+                    ast::ParenType::can_cast(it.kind()) || ast::ForType::can_cast(it.kind())
+                })
+                .last();
             let parent = paren.as_ref().and_then(|it| it.parent()).unwrap_or(parent);
             if ast::TypeBound::can_cast(parent.kind())
                 || ast::TypeAnchor::can_cast(parent.kind())
@@ -34,7 +38,7 @@ pub(super) fn hints(
                 return None;
             }
             sema.resolve_trait(&path.path()?)?;
-            paren.map_or_else(|| path.syntax().text_range(), |it| it.text_range())
+            path.syntax().text_range()
         }
         Either::Right(dyn_) => {
             if dyn_.dyn_token().is_some() {
@@ -89,7 +93,7 @@ fn foo(_: &T,  _: for<'a> T) {}
 impl T {}
   // ^ dyn
 impl T for (T) {}
-        // ^^^ dyn
+         // ^ dyn
 impl T
 "#,
         );
@@ -112,7 +116,7 @@ fn foo(
     _: &mut (T + T)
     //       ^^^^^ dyn
     _: *mut (T),
-    //      ^^^ dyn
+    //       ^ dyn
 ) {}
 "#,
         );
@@ -136,4 +140,26 @@ fn foo(
             "#]],
         );
     }
+
+    #[test]
+    fn hrtb_bound_does_not_add_dyn() {
+        check(
+            r#"
+//- minicore: fn
+fn test<F>(f: F) where F: for<'a> FnOnce(&'a i32) {}
+     // ^: Sized
+        "#,
+        );
+    }
+
+    #[test]
+    fn with_parentheses() {
+        check(
+            r#"
+trait T {}
+fn foo(v: &(T)) {}
+         // ^ dyn
+        "#,
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/ide/src/references.rs b/src/tools/rust-analyzer/crates/ide/src/references.rs
index fe874bc99b4..86b88a17c75 100644
--- a/src/tools/rust-analyzer/crates/ide/src/references.rs
+++ b/src/tools/rust-analyzer/crates/ide/src/references.rs
@@ -3088,4 +3088,42 @@ fn main() {
             "#]],
         );
     }
+
+    #[test]
+    fn raw_labels_and_lifetimes() {
+        check(
+            r#"
+fn foo<'r#fn>(s: &'r#fn str) {
+    let _a: &'r#fn str = s;
+    let _b: &'r#fn str;
+    'r#break$0: {
+        break 'r#break;
+    }
+}
+        "#,
+            expect![[r#"
+                'r#break Label FileId(0) 87..96 87..95
+
+                FileId(0) 113..121
+            "#]],
+        );
+        check(
+            r#"
+fn foo<'r#fn$0>(s: &'r#fn str) {
+    let _a: &'r#fn str = s;
+    let _b: &'r#fn str;
+    'r#break: {
+        break 'r#break;
+    }
+}
+        "#,
+            expect![[r#"
+                'r#fn LifetimeParam FileId(0) 7..12
+
+                FileId(0) 18..23
+                FileId(0) 44..49
+                FileId(0) 72..77
+            "#]],
+        );
+    }
 }
diff --git a/src/tools/rust-analyzer/crates/intern/src/symbol/symbols.rs b/src/tools/rust-analyzer/crates/intern/src/symbol/symbols.rs
index 1ccd20c25e9..4780743c4d9 100644
--- a/src/tools/rust-analyzer/crates/intern/src/symbol/symbols.rs
+++ b/src/tools/rust-analyzer/crates/intern/src/symbol/symbols.rs
@@ -156,6 +156,7 @@ define_symbols! {
     cfg_attr,
     cfg_eval,
     cfg,
+    cfg_select,
     char,
     clone,
     Clone,
diff --git a/src/tools/rust-analyzer/crates/parser/src/grammar/expressions.rs b/src/tools/rust-analyzer/crates/parser/src/grammar/expressions.rs
index 0ac25da3294..2b4151e3b75 100644
--- a/src/tools/rust-analyzer/crates/parser/src/grammar/expressions.rs
+++ b/src/tools/rust-analyzer/crates/parser/src/grammar/expressions.rs
@@ -4,7 +4,7 @@ use crate::grammar::attributes::ATTRIBUTE_FIRST;
 
 use super::*;
 
-pub(super) use atom::{EXPR_RECOVERY_SET, LITERAL_FIRST, literal};
+pub(super) use atom::{EXPR_RECOVERY_SET, LITERAL_FIRST, literal, parse_asm_expr};
 pub(crate) use atom::{block_expr, match_arm_list};
 
 #[derive(PartialEq, Eq)]
diff --git a/src/tools/rust-analyzer/crates/parser/src/grammar/expressions/atom.rs b/src/tools/rust-analyzer/crates/parser/src/grammar/expressions/atom.rs
index 8ed0fc6729f..76656567e7f 100644
--- a/src/tools/rust-analyzer/crates/parser/src/grammar/expressions/atom.rs
+++ b/src/tools/rust-analyzer/crates/parser/src/grammar/expressions/atom.rs
@@ -253,8 +253,7 @@ fn builtin_expr(p: &mut Parser<'_>) -> Option<CompletedMarker> {
     let m = p.start();
     p.bump_remap(T![builtin]);
     p.bump(T![#]);
-    if p.at_contextual_kw(T![offset_of]) {
-        p.bump_remap(T![offset_of]);
+    if p.eat_contextual_kw(T![offset_of]) {
         p.expect(T!['(']);
         type_(p);
         p.expect(T![,]);
@@ -278,8 +277,7 @@ fn builtin_expr(p: &mut Parser<'_>) -> Option<CompletedMarker> {
             p.expect(T![')']);
         }
         Some(m.complete(p, OFFSET_OF_EXPR))
-    } else if p.at_contextual_kw(T![format_args]) {
-        p.bump_remap(T![format_args]);
+    } else if p.eat_contextual_kw(T![format_args]) {
         p.expect(T!['(']);
         expr(p);
         if p.eat(T![,]) {
@@ -302,7 +300,16 @@ fn builtin_expr(p: &mut Parser<'_>) -> Option<CompletedMarker> {
         }
         p.expect(T![')']);
         Some(m.complete(p, FORMAT_ARGS_EXPR))
-    } else if p.at_contextual_kw(T![asm]) {
+    } else if p.eat_contextual_kw(T![asm])
+        || p.eat_contextual_kw(T![global_asm])
+        || p.eat_contextual_kw(T![naked_asm])
+    {
+        // test asm_kinds
+        // fn foo() {
+        //     builtin#asm("");
+        //     builtin#global_asm("");
+        //     builtin#naked_asm("");
+        // }
         parse_asm_expr(p, m)
     } else {
         m.abandon(p);
@@ -321,8 +328,7 @@ fn builtin_expr(p: &mut Parser<'_>) -> Option<CompletedMarker> {
 //         tmp = out(reg) _,
 //     );
 // }
-fn parse_asm_expr(p: &mut Parser<'_>, m: Marker) -> Option<CompletedMarker> {
-    p.bump_remap(T![asm]);
+pub(crate) fn parse_asm_expr(p: &mut Parser<'_>, m: Marker) -> Option<CompletedMarker> {
     p.expect(T!['(']);
     if expr(p).is_none() {
         p.err_and_bump("expected asm template");
@@ -411,11 +417,10 @@ fn parse_asm_expr(p: &mut Parser<'_>, m: Marker) -> Option<CompletedMarker> {
             dir_spec.abandon(p);
             op.abandon(p);
             op_n.abandon(p);
-            p.err_and_bump("expected asm operand");
 
-            // improves error recovery and handles err_and_bump recovering from `{` which gets
-            // the parser stuck here
+            // improves error recovery
             if p.at(T!['{']) {
+                p.error("expected asm operand");
                 // test_err bad_asm_expr
                 // fn foo() {
                 //     builtin#asm(
@@ -423,6 +428,8 @@ fn parse_asm_expr(p: &mut Parser<'_>, m: Marker) -> Option<CompletedMarker> {
                 //     );
                 // }
                 expr(p);
+            } else {
+                p.err_and_bump("expected asm operand");
             }
 
             if p.at(T!['}']) {
diff --git a/src/tools/rust-analyzer/crates/parser/src/grammar/items.rs b/src/tools/rust-analyzer/crates/parser/src/grammar/items.rs
index b9f4866574a..8e551b0b961 100644
--- a/src/tools/rust-analyzer/crates/parser/src/grammar/items.rs
+++ b/src/tools/rust-analyzer/crates/parser/src/grammar/items.rs
@@ -261,6 +261,19 @@ fn opt_item_without_modifiers(p: &mut Parser<'_>, m: Marker) -> Result<(), Marke
         T![const] if (la == IDENT || la == T![_] || la == T![mut]) => consts::konst(p, m),
         T![static] if (la == IDENT || la == T![_] || la == T![mut]) => consts::static_(p, m),
 
+        IDENT
+            if p.at_contextual_kw(T![builtin])
+                && p.nth_at(1, T![#])
+                && p.nth_at_contextual_kw(2, T![global_asm]) =>
+        {
+            p.bump_remap(T![builtin]);
+            p.bump(T![#]);
+            p.bump_remap(T![global_asm]);
+            // test global_asm
+            // builtin#global_asm("")
+            expressions::parse_asm_expr(p, m);
+        }
+
         _ => return Err(m),
     };
     Ok(())
diff --git a/src/tools/rust-analyzer/crates/parser/src/lexed_str.rs b/src/tools/rust-analyzer/crates/parser/src/lexed_str.rs
index e6c92dec681..8fff1c3db74 100644
--- a/src/tools/rust-analyzer/crates/parser/src/lexed_str.rs
+++ b/src/tools/rust-analyzer/crates/parser/src/lexed_str.rs
@@ -44,7 +44,9 @@ impl<'a> LexedStr<'a> {
 
         // Re-create the tokenizer from scratch every token because `GuardedStrPrefix` is one token in the lexer
         // but we want to split it to two in edition <2024.
-        while let Some(token) = rustc_lexer::tokenize(&text[conv.offset..]).next() {
+        while let Some(token) =
+            rustc_lexer::tokenize(&text[conv.offset..], rustc_lexer::FrontmatterAllowed::No).next()
+        {
             let token_text = &text[conv.offset..][..token.len as usize];
 
             conv.extend_token(&token.kind, token_text);
@@ -58,7 +60,7 @@ impl<'a> LexedStr<'a> {
             return None;
         }
 
-        let token = rustc_lexer::tokenize(text).next()?;
+        let token = rustc_lexer::tokenize(text, rustc_lexer::FrontmatterAllowed::No).next()?;
         if token.len as usize != text.len() {
             return None;
         }
diff --git a/src/tools/rust-analyzer/crates/parser/src/parser.rs b/src/tools/rust-analyzer/crates/parser/src/parser.rs
index 36a363afe93..ca02d9fdfde 100644
--- a/src/tools/rust-analyzer/crates/parser/src/parser.rs
+++ b/src/tools/rust-analyzer/crates/parser/src/parser.rs
@@ -29,7 +29,7 @@ pub(crate) struct Parser<'t> {
     edition: Edition,
 }
 
-const PARSER_STEP_LIMIT: usize = 15_000_000;
+const PARSER_STEP_LIMIT: usize = if cfg!(debug_assertions) { 150_000 } else { 15_000_000 };
 
 impl<'t> Parser<'t> {
     pub(super) fn new(inp: &'t Input, edition: Edition) -> Parser<'t> {
@@ -254,7 +254,10 @@ impl<'t> Parser<'t> {
 
     /// Create an error node and consume the next token.
     pub(crate) fn err_and_bump(&mut self, message: &str) {
-        self.err_recover(message, TokenSet::EMPTY);
+        let m = self.start();
+        self.error(message);
+        self.bump_any();
+        m.complete(self, ERROR);
     }
 
     /// Create an error node and consume the next token unless it is in the recovery set.
diff --git a/src/tools/rust-analyzer/crates/parser/src/syntax_kind/generated.rs b/src/tools/rust-analyzer/crates/parser/src/syntax_kind/generated.rs
index f534546ea07..12a13caa4d9 100644
--- a/src/tools/rust-analyzer/crates/parser/src/syntax_kind/generated.rs
+++ b/src/tools/rust-analyzer/crates/parser/src/syntax_kind/generated.rs
@@ -120,12 +120,14 @@ pub enum SyntaxKind {
     DYN_KW,
     FORMAT_ARGS_KW,
     GEN_KW,
+    GLOBAL_ASM_KW,
     INLATEOUT_KW,
     INOUT_KW,
     LABEL_KW,
     LATEOUT_KW,
     MACRO_RULES_KW,
     MAY_UNWIND_KW,
+    NAKED_ASM_KW,
     NOMEM_KW,
     NORETURN_KW,
     NOSTACK_KW,
@@ -599,12 +601,14 @@ impl SyntaxKind {
             DEFAULT_KW => "default",
             DYN_KW => "dyn",
             FORMAT_ARGS_KW => "format_args",
+            GLOBAL_ASM_KW => "global_asm",
             INLATEOUT_KW => "inlateout",
             INOUT_KW => "inout",
             LABEL_KW => "label",
             LATEOUT_KW => "lateout",
             MACRO_RULES_KW => "macro_rules",
             MAY_UNWIND_KW => "may_unwind",
+            NAKED_ASM_KW => "naked_asm",
             NOMEM_KW => "nomem",
             NORETURN_KW => "noreturn",
             NOSTACK_KW => "nostack",
@@ -699,12 +703,14 @@ impl SyntaxKind {
             DEFAULT_KW => true,
             DYN_KW if edition < Edition::Edition2018 => true,
             FORMAT_ARGS_KW => true,
+            GLOBAL_ASM_KW => true,
             INLATEOUT_KW => true,
             INOUT_KW => true,
             LABEL_KW => true,
             LATEOUT_KW => true,
             MACRO_RULES_KW => true,
             MAY_UNWIND_KW => true,
+            NAKED_ASM_KW => true,
             NOMEM_KW => true,
             NORETURN_KW => true,
             NOSTACK_KW => true,
@@ -787,12 +793,14 @@ impl SyntaxKind {
             DEFAULT_KW => true,
             DYN_KW if edition < Edition::Edition2018 => true,
             FORMAT_ARGS_KW => true,
+            GLOBAL_ASM_KW => true,
             INLATEOUT_KW => true,
             INOUT_KW => true,
             LABEL_KW => true,
             LATEOUT_KW => true,
             MACRO_RULES_KW => true,
             MAY_UNWIND_KW => true,
+            NAKED_ASM_KW => true,
             NOMEM_KW => true,
             NORETURN_KW => true,
             NOSTACK_KW => true,
@@ -938,12 +946,14 @@ impl SyntaxKind {
             "default" => DEFAULT_KW,
             "dyn" if edition < Edition::Edition2018 => DYN_KW,
             "format_args" => FORMAT_ARGS_KW,
+            "global_asm" => GLOBAL_ASM_KW,
             "inlateout" => INLATEOUT_KW,
             "inout" => INOUT_KW,
             "label" => LABEL_KW,
             "lateout" => LATEOUT_KW,
             "macro_rules" => MACRO_RULES_KW,
             "may_unwind" => MAY_UNWIND_KW,
+            "naked_asm" => NAKED_ASM_KW,
             "nomem" => NOMEM_KW,
             "noreturn" => NORETURN_KW,
             "nostack" => NOSTACK_KW,
@@ -998,7 +1008,7 @@ impl SyntaxKind {
     }
 }
 #[macro_export]
-macro_rules ! T_ { [$] => { $ crate :: SyntaxKind :: DOLLAR } ; [;] => { $ crate :: SyntaxKind :: SEMICOLON } ; [,] => { $ crate :: SyntaxKind :: COMMA } ; ['('] => { $ crate :: SyntaxKind :: L_PAREN } ; [')'] => { $ crate :: SyntaxKind :: R_PAREN } ; ['{'] => { $ crate :: SyntaxKind :: L_CURLY } ; ['}'] => { $ crate :: SyntaxKind :: R_CURLY } ; ['['] => { $ crate :: SyntaxKind :: L_BRACK } ; [']'] => { $ crate :: SyntaxKind :: R_BRACK } ; [<] => { $ crate :: SyntaxKind :: L_ANGLE } ; [>] => { $ crate :: SyntaxKind :: R_ANGLE } ; [@] => { $ crate :: SyntaxKind :: AT } ; [#] => { $ crate :: SyntaxKind :: POUND } ; [~] => { $ crate :: SyntaxKind :: TILDE } ; [?] => { $ crate :: SyntaxKind :: QUESTION } ; [&] => { $ crate :: SyntaxKind :: AMP } ; [|] => { $ crate :: SyntaxKind :: PIPE } ; [+] => { $ crate :: SyntaxKind :: PLUS } ; [*] => { $ crate :: SyntaxKind :: STAR } ; [/] => { $ crate :: SyntaxKind :: SLASH } ; [^] => { $ crate :: SyntaxKind :: CARET } ; [%] => { $ crate :: SyntaxKind :: PERCENT } ; [_] => { $ crate :: SyntaxKind :: UNDERSCORE } ; [.] => { $ crate :: SyntaxKind :: DOT } ; [..] => { $ crate :: SyntaxKind :: DOT2 } ; [...] => { $ crate :: SyntaxKind :: DOT3 } ; [..=] => { $ crate :: SyntaxKind :: DOT2EQ } ; [:] => { $ crate :: SyntaxKind :: COLON } ; [::] => { $ crate :: SyntaxKind :: COLON2 } ; [=] => { $ crate :: SyntaxKind :: EQ } ; [==] => { $ crate :: SyntaxKind :: EQ2 } ; [=>] => { $ crate :: SyntaxKind :: FAT_ARROW } ; [!] => { $ crate :: SyntaxKind :: BANG } ; [!=] => { $ crate :: SyntaxKind :: NEQ } ; [-] => { $ crate :: SyntaxKind :: MINUS } ; [->] => { $ crate :: SyntaxKind :: THIN_ARROW } ; [<=] => { $ crate :: SyntaxKind :: LTEQ } ; [>=] => { $ crate :: SyntaxKind :: GTEQ } ; [+=] => { $ crate :: SyntaxKind :: PLUSEQ } ; [-=] => { $ crate :: SyntaxKind :: MINUSEQ } ; [|=] => { $ crate :: SyntaxKind :: PIPEEQ } ; [&=] => { $ crate :: SyntaxKind :: AMPEQ } ; [^=] => { $ crate :: SyntaxKind :: CARETEQ } ; [/=] => { $ crate :: SyntaxKind :: SLASHEQ } ; [*=] => { $ crate :: SyntaxKind :: STAREQ } ; [%=] => { $ crate :: SyntaxKind :: PERCENTEQ } ; [&&] => { $ crate :: SyntaxKind :: AMP2 } ; [||] => { $ crate :: SyntaxKind :: PIPE2 } ; [<<] => { $ crate :: SyntaxKind :: SHL } ; [>>] => { $ crate :: SyntaxKind :: SHR } ; [<<=] => { $ crate :: SyntaxKind :: SHLEQ } ; [>>=] => { $ crate :: SyntaxKind :: SHREQ } ; [Self] => { $ crate :: SyntaxKind :: SELF_TYPE_KW } ; [abstract] => { $ crate :: SyntaxKind :: ABSTRACT_KW } ; [as] => { $ crate :: SyntaxKind :: AS_KW } ; [become] => { $ crate :: SyntaxKind :: BECOME_KW } ; [box] => { $ crate :: SyntaxKind :: BOX_KW } ; [break] => { $ crate :: SyntaxKind :: BREAK_KW } ; [const] => { $ crate :: SyntaxKind :: CONST_KW } ; [continue] => { $ crate :: SyntaxKind :: CONTINUE_KW } ; [crate] => { $ crate :: SyntaxKind :: CRATE_KW } ; [do] => { $ crate :: SyntaxKind :: DO_KW } ; [else] => { $ crate :: SyntaxKind :: ELSE_KW } ; [enum] => { $ crate :: SyntaxKind :: ENUM_KW } ; [extern] => { $ crate :: SyntaxKind :: EXTERN_KW } ; [false] => { $ crate :: SyntaxKind :: FALSE_KW } ; [final] => { $ crate :: SyntaxKind :: FINAL_KW } ; [fn] => { $ crate :: SyntaxKind :: FN_KW } ; [for] => { $ crate :: SyntaxKind :: FOR_KW } ; [if] => { $ crate :: SyntaxKind :: IF_KW } ; [impl] => { $ crate :: SyntaxKind :: IMPL_KW } ; [in] => { $ crate :: SyntaxKind :: IN_KW } ; [let] => { $ crate :: SyntaxKind :: LET_KW } ; [loop] => { $ crate :: SyntaxKind :: LOOP_KW } ; [macro] => { $ crate :: SyntaxKind :: MACRO_KW } ; [match] => { $ crate :: SyntaxKind :: MATCH_KW } ; [mod] => { $ crate :: SyntaxKind :: MOD_KW } ; [move] => { $ crate :: SyntaxKind :: MOVE_KW } ; [mut] => { $ crate :: SyntaxKind :: MUT_KW } ; [override] => { $ crate :: SyntaxKind :: OVERRIDE_KW } ; [priv] => { $ crate :: SyntaxKind :: PRIV_KW } ; [pub] => { $ crate :: SyntaxKind :: PUB_KW } ; [ref] => { $ crate :: SyntaxKind :: REF_KW } ; [return] => { $ crate :: SyntaxKind :: RETURN_KW } ; [self] => { $ crate :: SyntaxKind :: SELF_KW } ; [static] => { $ crate :: SyntaxKind :: STATIC_KW } ; [struct] => { $ crate :: SyntaxKind :: STRUCT_KW } ; [super] => { $ crate :: SyntaxKind :: SUPER_KW } ; [trait] => { $ crate :: SyntaxKind :: TRAIT_KW } ; [true] => { $ crate :: SyntaxKind :: TRUE_KW } ; [type] => { $ crate :: SyntaxKind :: TYPE_KW } ; [typeof] => { $ crate :: SyntaxKind :: TYPEOF_KW } ; [unsafe] => { $ crate :: SyntaxKind :: UNSAFE_KW } ; [unsized] => { $ crate :: SyntaxKind :: UNSIZED_KW } ; [use] => { $ crate :: SyntaxKind :: USE_KW } ; [virtual] => { $ crate :: SyntaxKind :: VIRTUAL_KW } ; [where] => { $ crate :: SyntaxKind :: WHERE_KW } ; [while] => { $ crate :: SyntaxKind :: WHILE_KW } ; [yield] => { $ crate :: SyntaxKind :: YIELD_KW } ; [asm] => { $ crate :: SyntaxKind :: ASM_KW } ; [att_syntax] => { $ crate :: SyntaxKind :: ATT_SYNTAX_KW } ; [auto] => { $ crate :: SyntaxKind :: AUTO_KW } ; [builtin] => { $ crate :: SyntaxKind :: BUILTIN_KW } ; [clobber_abi] => { $ crate :: SyntaxKind :: CLOBBER_ABI_KW } ; [default] => { $ crate :: SyntaxKind :: DEFAULT_KW } ; [dyn] => { $ crate :: SyntaxKind :: DYN_KW } ; [format_args] => { $ crate :: SyntaxKind :: FORMAT_ARGS_KW } ; [inlateout] => { $ crate :: SyntaxKind :: INLATEOUT_KW } ; [inout] => { $ crate :: SyntaxKind :: INOUT_KW } ; [label] => { $ crate :: SyntaxKind :: LABEL_KW } ; [lateout] => { $ crate :: SyntaxKind :: LATEOUT_KW } ; [macro_rules] => { $ crate :: SyntaxKind :: MACRO_RULES_KW } ; [may_unwind] => { $ crate :: SyntaxKind :: MAY_UNWIND_KW } ; [nomem] => { $ crate :: SyntaxKind :: NOMEM_KW } ; [noreturn] => { $ crate :: SyntaxKind :: NORETURN_KW } ; [nostack] => { $ crate :: SyntaxKind :: NOSTACK_KW } ; [offset_of] => { $ crate :: SyntaxKind :: OFFSET_OF_KW } ; [options] => { $ crate :: SyntaxKind :: OPTIONS_KW } ; [out] => { $ crate :: SyntaxKind :: OUT_KW } ; [preserves_flags] => { $ crate :: SyntaxKind :: PRESERVES_FLAGS_KW } ; [pure] => { $ crate :: SyntaxKind :: PURE_KW } ; [raw] => { $ crate :: SyntaxKind :: RAW_KW } ; [readonly] => { $ crate :: SyntaxKind :: READONLY_KW } ; [safe] => { $ crate :: SyntaxKind :: SAFE_KW } ; [sym] => { $ crate :: SyntaxKind :: SYM_KW } ; [union] => { $ crate :: SyntaxKind :: UNION_KW } ; [yeet] => { $ crate :: SyntaxKind :: YEET_KW } ; [async] => { $ crate :: SyntaxKind :: ASYNC_KW } ; [await] => { $ crate :: SyntaxKind :: AWAIT_KW } ; [dyn] => { $ crate :: SyntaxKind :: DYN_KW } ; [gen] => { $ crate :: SyntaxKind :: GEN_KW } ; [try] => { $ crate :: SyntaxKind :: TRY_KW } ; [lifetime_ident] => { $ crate :: SyntaxKind :: LIFETIME_IDENT } ; [int_number] => { $ crate :: SyntaxKind :: INT_NUMBER } ; [ident] => { $ crate :: SyntaxKind :: IDENT } ; [string] => { $ crate :: SyntaxKind :: STRING } ; [shebang] => { $ crate :: SyntaxKind :: SHEBANG } ; [frontmatter] => { $ crate :: SyntaxKind :: FRONTMATTER } ; }
+macro_rules ! T_ { [$] => { $ crate :: SyntaxKind :: DOLLAR } ; [;] => { $ crate :: SyntaxKind :: SEMICOLON } ; [,] => { $ crate :: SyntaxKind :: COMMA } ; ['('] => { $ crate :: SyntaxKind :: L_PAREN } ; [')'] => { $ crate :: SyntaxKind :: R_PAREN } ; ['{'] => { $ crate :: SyntaxKind :: L_CURLY } ; ['}'] => { $ crate :: SyntaxKind :: R_CURLY } ; ['['] => { $ crate :: SyntaxKind :: L_BRACK } ; [']'] => { $ crate :: SyntaxKind :: R_BRACK } ; [<] => { $ crate :: SyntaxKind :: L_ANGLE } ; [>] => { $ crate :: SyntaxKind :: R_ANGLE } ; [@] => { $ crate :: SyntaxKind :: AT } ; [#] => { $ crate :: SyntaxKind :: POUND } ; [~] => { $ crate :: SyntaxKind :: TILDE } ; [?] => { $ crate :: SyntaxKind :: QUESTION } ; [&] => { $ crate :: SyntaxKind :: AMP } ; [|] => { $ crate :: SyntaxKind :: PIPE } ; [+] => { $ crate :: SyntaxKind :: PLUS } ; [*] => { $ crate :: SyntaxKind :: STAR } ; [/] => { $ crate :: SyntaxKind :: SLASH } ; [^] => { $ crate :: SyntaxKind :: CARET } ; [%] => { $ crate :: SyntaxKind :: PERCENT } ; [_] => { $ crate :: SyntaxKind :: UNDERSCORE } ; [.] => { $ crate :: SyntaxKind :: DOT } ; [..] => { $ crate :: SyntaxKind :: DOT2 } ; [...] => { $ crate :: SyntaxKind :: DOT3 } ; [..=] => { $ crate :: SyntaxKind :: DOT2EQ } ; [:] => { $ crate :: SyntaxKind :: COLON } ; [::] => { $ crate :: SyntaxKind :: COLON2 } ; [=] => { $ crate :: SyntaxKind :: EQ } ; [==] => { $ crate :: SyntaxKind :: EQ2 } ; [=>] => { $ crate :: SyntaxKind :: FAT_ARROW } ; [!] => { $ crate :: SyntaxKind :: BANG } ; [!=] => { $ crate :: SyntaxKind :: NEQ } ; [-] => { $ crate :: SyntaxKind :: MINUS } ; [->] => { $ crate :: SyntaxKind :: THIN_ARROW } ; [<=] => { $ crate :: SyntaxKind :: LTEQ } ; [>=] => { $ crate :: SyntaxKind :: GTEQ } ; [+=] => { $ crate :: SyntaxKind :: PLUSEQ } ; [-=] => { $ crate :: SyntaxKind :: MINUSEQ } ; [|=] => { $ crate :: SyntaxKind :: PIPEEQ } ; [&=] => { $ crate :: SyntaxKind :: AMPEQ } ; [^=] => { $ crate :: SyntaxKind :: CARETEQ } ; [/=] => { $ crate :: SyntaxKind :: SLASHEQ } ; [*=] => { $ crate :: SyntaxKind :: STAREQ } ; [%=] => { $ crate :: SyntaxKind :: PERCENTEQ } ; [&&] => { $ crate :: SyntaxKind :: AMP2 } ; [||] => { $ crate :: SyntaxKind :: PIPE2 } ; [<<] => { $ crate :: SyntaxKind :: SHL } ; [>>] => { $ crate :: SyntaxKind :: SHR } ; [<<=] => { $ crate :: SyntaxKind :: SHLEQ } ; [>>=] => { $ crate :: SyntaxKind :: SHREQ } ; [Self] => { $ crate :: SyntaxKind :: SELF_TYPE_KW } ; [abstract] => { $ crate :: SyntaxKind :: ABSTRACT_KW } ; [as] => { $ crate :: SyntaxKind :: AS_KW } ; [become] => { $ crate :: SyntaxKind :: BECOME_KW } ; [box] => { $ crate :: SyntaxKind :: BOX_KW } ; [break] => { $ crate :: SyntaxKind :: BREAK_KW } ; [const] => { $ crate :: SyntaxKind :: CONST_KW } ; [continue] => { $ crate :: SyntaxKind :: CONTINUE_KW } ; [crate] => { $ crate :: SyntaxKind :: CRATE_KW } ; [do] => { $ crate :: SyntaxKind :: DO_KW } ; [else] => { $ crate :: SyntaxKind :: ELSE_KW } ; [enum] => { $ crate :: SyntaxKind :: ENUM_KW } ; [extern] => { $ crate :: SyntaxKind :: EXTERN_KW } ; [false] => { $ crate :: SyntaxKind :: FALSE_KW } ; [final] => { $ crate :: SyntaxKind :: FINAL_KW } ; [fn] => { $ crate :: SyntaxKind :: FN_KW } ; [for] => { $ crate :: SyntaxKind :: FOR_KW } ; [if] => { $ crate :: SyntaxKind :: IF_KW } ; [impl] => { $ crate :: SyntaxKind :: IMPL_KW } ; [in] => { $ crate :: SyntaxKind :: IN_KW } ; [let] => { $ crate :: SyntaxKind :: LET_KW } ; [loop] => { $ crate :: SyntaxKind :: LOOP_KW } ; [macro] => { $ crate :: SyntaxKind :: MACRO_KW } ; [match] => { $ crate :: SyntaxKind :: MATCH_KW } ; [mod] => { $ crate :: SyntaxKind :: MOD_KW } ; [move] => { $ crate :: SyntaxKind :: MOVE_KW } ; [mut] => { $ crate :: SyntaxKind :: MUT_KW } ; [override] => { $ crate :: SyntaxKind :: OVERRIDE_KW } ; [priv] => { $ crate :: SyntaxKind :: PRIV_KW } ; [pub] => { $ crate :: SyntaxKind :: PUB_KW } ; [ref] => { $ crate :: SyntaxKind :: REF_KW } ; [return] => { $ crate :: SyntaxKind :: RETURN_KW } ; [self] => { $ crate :: SyntaxKind :: SELF_KW } ; [static] => { $ crate :: SyntaxKind :: STATIC_KW } ; [struct] => { $ crate :: SyntaxKind :: STRUCT_KW } ; [super] => { $ crate :: SyntaxKind :: SUPER_KW } ; [trait] => { $ crate :: SyntaxKind :: TRAIT_KW } ; [true] => { $ crate :: SyntaxKind :: TRUE_KW } ; [type] => { $ crate :: SyntaxKind :: TYPE_KW } ; [typeof] => { $ crate :: SyntaxKind :: TYPEOF_KW } ; [unsafe] => { $ crate :: SyntaxKind :: UNSAFE_KW } ; [unsized] => { $ crate :: SyntaxKind :: UNSIZED_KW } ; [use] => { $ crate :: SyntaxKind :: USE_KW } ; [virtual] => { $ crate :: SyntaxKind :: VIRTUAL_KW } ; [where] => { $ crate :: SyntaxKind :: WHERE_KW } ; [while] => { $ crate :: SyntaxKind :: WHILE_KW } ; [yield] => { $ crate :: SyntaxKind :: YIELD_KW } ; [asm] => { $ crate :: SyntaxKind :: ASM_KW } ; [att_syntax] => { $ crate :: SyntaxKind :: ATT_SYNTAX_KW } ; [auto] => { $ crate :: SyntaxKind :: AUTO_KW } ; [builtin] => { $ crate :: SyntaxKind :: BUILTIN_KW } ; [clobber_abi] => { $ crate :: SyntaxKind :: CLOBBER_ABI_KW } ; [default] => { $ crate :: SyntaxKind :: DEFAULT_KW } ; [dyn] => { $ crate :: SyntaxKind :: DYN_KW } ; [format_args] => { $ crate :: SyntaxKind :: FORMAT_ARGS_KW } ; [global_asm] => { $ crate :: SyntaxKind :: GLOBAL_ASM_KW } ; [inlateout] => { $ crate :: SyntaxKind :: INLATEOUT_KW } ; [inout] => { $ crate :: SyntaxKind :: INOUT_KW } ; [label] => { $ crate :: SyntaxKind :: LABEL_KW } ; [lateout] => { $ crate :: SyntaxKind :: LATEOUT_KW } ; [macro_rules] => { $ crate :: SyntaxKind :: MACRO_RULES_KW } ; [may_unwind] => { $ crate :: SyntaxKind :: MAY_UNWIND_KW } ; [naked_asm] => { $ crate :: SyntaxKind :: NAKED_ASM_KW } ; [nomem] => { $ crate :: SyntaxKind :: NOMEM_KW } ; [noreturn] => { $ crate :: SyntaxKind :: NORETURN_KW } ; [nostack] => { $ crate :: SyntaxKind :: NOSTACK_KW } ; [offset_of] => { $ crate :: SyntaxKind :: OFFSET_OF_KW } ; [options] => { $ crate :: SyntaxKind :: OPTIONS_KW } ; [out] => { $ crate :: SyntaxKind :: OUT_KW } ; [preserves_flags] => { $ crate :: SyntaxKind :: PRESERVES_FLAGS_KW } ; [pure] => { $ crate :: SyntaxKind :: PURE_KW } ; [raw] => { $ crate :: SyntaxKind :: RAW_KW } ; [readonly] => { $ crate :: SyntaxKind :: READONLY_KW } ; [safe] => { $ crate :: SyntaxKind :: SAFE_KW } ; [sym] => { $ crate :: SyntaxKind :: SYM_KW } ; [union] => { $ crate :: SyntaxKind :: UNION_KW } ; [yeet] => { $ crate :: SyntaxKind :: YEET_KW } ; [async] => { $ crate :: SyntaxKind :: ASYNC_KW } ; [await] => { $ crate :: SyntaxKind :: AWAIT_KW } ; [dyn] => { $ crate :: SyntaxKind :: DYN_KW } ; [gen] => { $ crate :: SyntaxKind :: GEN_KW } ; [try] => { $ crate :: SyntaxKind :: TRY_KW } ; [lifetime_ident] => { $ crate :: SyntaxKind :: LIFETIME_IDENT } ; [int_number] => { $ crate :: SyntaxKind :: INT_NUMBER } ; [ident] => { $ crate :: SyntaxKind :: IDENT } ; [string] => { $ crate :: SyntaxKind :: STRING } ; [shebang] => { $ crate :: SyntaxKind :: SHEBANG } ; [frontmatter] => { $ crate :: SyntaxKind :: FRONTMATTER } ; }
 impl ::core::marker::Copy for SyntaxKind {}
 impl ::core::clone::Clone for SyntaxKind {
     #[inline]
diff --git a/src/tools/rust-analyzer/crates/parser/test_data/generated/runner.rs b/src/tools/rust-analyzer/crates/parser/test_data/generated/runner.rs
index 6ec4192830b..cef7b0ee239 100644
--- a/src/tools/rust-analyzer/crates/parser/test_data/generated/runner.rs
+++ b/src/tools/rust-analyzer/crates/parser/test_data/generated/runner.rs
@@ -21,6 +21,8 @@ mod ok {
     #[test]
     fn asm_expr() { run_and_expect_no_errors("test_data/parser/inline/ok/asm_expr.rs"); }
     #[test]
+    fn asm_kinds() { run_and_expect_no_errors("test_data/parser/inline/ok/asm_kinds.rs"); }
+    #[test]
     fn asm_label() { run_and_expect_no_errors("test_data/parser/inline/ok/asm_label.rs"); }
     #[test]
     fn assoc_const_eq() {
@@ -298,6 +300,8 @@ mod ok {
         run_and_expect_no_errors("test_data/parser/inline/ok/generic_param_list.rs");
     }
     #[test]
+    fn global_asm() { run_and_expect_no_errors("test_data/parser/inline/ok/global_asm.rs"); }
+    #[test]
     fn half_open_range_pat() {
         run_and_expect_no_errors("test_data/parser/inline/ok/half_open_range_pat.rs");
     }
diff --git a/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/asm_kinds.rast b/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/asm_kinds.rast
new file mode 100644
index 00000000000..c337d89aa50
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/asm_kinds.rast
@@ -0,0 +1,48 @@
+SOURCE_FILE
+  FN
+    FN_KW "fn"
+    WHITESPACE " "
+    NAME
+      IDENT "foo"
+    PARAM_LIST
+      L_PAREN "("
+      R_PAREN ")"
+    WHITESPACE " "
+    BLOCK_EXPR
+      STMT_LIST
+        L_CURLY "{"
+        WHITESPACE "\n    "
+        EXPR_STMT
+          ASM_EXPR
+            BUILTIN_KW "builtin"
+            POUND "#"
+            ASM_KW "asm"
+            L_PAREN "("
+            LITERAL
+              STRING "\"\""
+            R_PAREN ")"
+          SEMICOLON ";"
+        WHITESPACE "\n    "
+        ASM_EXPR
+          BUILTIN_KW "builtin"
+          POUND "#"
+          GLOBAL_ASM_KW "global_asm"
+          L_PAREN "("
+          LITERAL
+            STRING "\"\""
+          R_PAREN ")"
+        SEMICOLON ";"
+        WHITESPACE "\n    "
+        EXPR_STMT
+          ASM_EXPR
+            BUILTIN_KW "builtin"
+            POUND "#"
+            NAKED_ASM_KW "naked_asm"
+            L_PAREN "("
+            LITERAL
+              STRING "\"\""
+            R_PAREN ")"
+          SEMICOLON ";"
+        WHITESPACE "\n"
+        R_CURLY "}"
+  WHITESPACE "\n"
diff --git a/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/asm_kinds.rs b/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/asm_kinds.rs
new file mode 100644
index 00000000000..9c03e9de689
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/asm_kinds.rs
@@ -0,0 +1,5 @@
+fn foo() {
+    builtin#asm("");
+    builtin#global_asm("");
+    builtin#naked_asm("");
+}
diff --git a/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/global_asm.rast b/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/global_asm.rast
new file mode 100644
index 00000000000..5337c56be17
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/global_asm.rast
@@ -0,0 +1,10 @@
+SOURCE_FILE
+  ASM_EXPR
+    BUILTIN_KW "builtin"
+    POUND "#"
+    GLOBAL_ASM_KW "global_asm"
+    L_PAREN "("
+    LITERAL
+      STRING "\"\""
+    R_PAREN ")"
+  WHITESPACE "\n"
diff --git a/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/global_asm.rs b/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/global_asm.rs
new file mode 100644
index 00000000000..967ce1f5fd9
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/global_asm.rs
@@ -0,0 +1 @@
+builtin#global_asm("")
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl.rs b/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl.rs
index dd576f23ae9..662f6257642 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl.rs
@@ -121,7 +121,7 @@ pub(super) fn literal_from_str<Span: Copy>(
     use proc_macro::bridge::LitKind;
     use rustc_lexer::{LiteralKind, Token, TokenKind};
 
-    let mut tokens = rustc_lexer::tokenize(s);
+    let mut tokens = rustc_lexer::tokenize(s, rustc_lexer::FrontmatterAllowed::No);
     let minus_or_lit = tokens.next().unwrap_or(Token { kind: TokenKind::Eof, len: 0 });
 
     let lit = if minus_or_lit.kind == TokenKind::Minus {
diff --git a/src/tools/rust-analyzer/crates/project-model/src/cargo_config_file.rs b/src/tools/rust-analyzer/crates/project-model/src/cargo_config_file.rs
new file mode 100644
index 00000000000..7966f74df30
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/project-model/src/cargo_config_file.rs
@@ -0,0 +1,34 @@
+//! Read `.cargo/config.toml` as a JSON object
+use rustc_hash::FxHashMap;
+use toolchain::Tool;
+
+use crate::{ManifestPath, Sysroot, utf8_stdout};
+
+pub(crate) type CargoConfigFile = serde_json::Map<String, serde_json::Value>;
+
+pub(crate) fn read(
+    manifest: &ManifestPath,
+    extra_env: &FxHashMap<String, Option<String>>,
+    sysroot: &Sysroot,
+) -> Option<CargoConfigFile> {
+    let mut cargo_config = sysroot.tool(Tool::Cargo, manifest.parent(), extra_env);
+    cargo_config
+        .args(["-Z", "unstable-options", "config", "get", "--format", "json"])
+        .env("RUSTC_BOOTSTRAP", "1");
+    if manifest.is_rust_manifest() {
+        cargo_config.arg("-Zscript");
+    }
+
+    tracing::debug!("Discovering cargo config by {:?}", cargo_config);
+    let json: serde_json::Map<String, serde_json::Value> = utf8_stdout(&mut cargo_config)
+        .inspect(|json| {
+            tracing::debug!("Discovered cargo config: {:?}", json);
+        })
+        .inspect_err(|err| {
+            tracing::debug!("Failed to discover cargo config: {:?}", err);
+        })
+        .ok()
+        .and_then(|stdout| serde_json::from_str(&stdout).ok())?;
+
+    Some(json)
+}
diff --git a/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs b/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
index 4bacc904174..daadcd9d79a 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/cargo_workspace.rs
@@ -300,8 +300,6 @@ pub struct CargoMetadataConfig {
     pub extra_args: Vec<String>,
     /// Extra env vars to set when invoking the cargo command
     pub extra_env: FxHashMap<String, Option<String>>,
-    /// The target dir for this workspace load.
-    pub target_dir: Utf8PathBuf,
     /// What kind of metadata are we fetching: workspace, rustc, or sysroot.
     pub kind: &'static str,
     /// The toolchain version, if known.
@@ -317,188 +315,6 @@ struct PackageMetadata {
 }
 
 impl CargoWorkspace {
-    /// Fetches the metadata for the given `cargo_toml` manifest.
-    /// A successful result may contain another metadata error if the initial fetching failed but
-    /// the `--no-deps` retry succeeded.
-    ///
-    /// The sysroot is used to set the `RUSTUP_TOOLCHAIN` env var when invoking cargo
-    /// to ensure that the rustup proxy uses the correct toolchain.
-    pub fn fetch_metadata(
-        cargo_toml: &ManifestPath,
-        current_dir: &AbsPath,
-        config: &CargoMetadataConfig,
-        sysroot: &Sysroot,
-        no_deps: bool,
-        locked: bool,
-        progress: &dyn Fn(String),
-    ) -> anyhow::Result<(cargo_metadata::Metadata, Option<anyhow::Error>)> {
-        let res = Self::fetch_metadata_(
-            cargo_toml,
-            current_dir,
-            config,
-            sysroot,
-            no_deps,
-            locked,
-            progress,
-        );
-        if let Ok((_, Some(ref e))) = res {
-            tracing::warn!(
-                %cargo_toml,
-                ?e,
-                "`cargo metadata` failed, but retry with `--no-deps` succeeded"
-            );
-        }
-        res
-    }
-
-    fn fetch_metadata_(
-        cargo_toml: &ManifestPath,
-        current_dir: &AbsPath,
-        config: &CargoMetadataConfig,
-        sysroot: &Sysroot,
-        no_deps: bool,
-        locked: bool,
-        progress: &dyn Fn(String),
-    ) -> anyhow::Result<(cargo_metadata::Metadata, Option<anyhow::Error>)> {
-        let cargo = sysroot.tool(Tool::Cargo, current_dir, &config.extra_env);
-        let mut meta = MetadataCommand::new();
-        meta.cargo_path(cargo.get_program());
-        cargo.get_envs().for_each(|(var, val)| _ = meta.env(var, val.unwrap_or_default()));
-        meta.manifest_path(cargo_toml.to_path_buf());
-        match &config.features {
-            CargoFeatures::All => {
-                meta.features(CargoOpt::AllFeatures);
-            }
-            CargoFeatures::Selected { features, no_default_features } => {
-                if *no_default_features {
-                    meta.features(CargoOpt::NoDefaultFeatures);
-                }
-                if !features.is_empty() {
-                    meta.features(CargoOpt::SomeFeatures(features.clone()));
-                }
-            }
-        }
-        meta.current_dir(current_dir);
-
-        let mut other_options = vec![];
-        // cargo metadata only supports a subset of flags of what cargo usually accepts, and usually
-        // the only relevant flags for metadata here are unstable ones, so we pass those along
-        // but nothing else
-        let mut extra_args = config.extra_args.iter();
-        while let Some(arg) = extra_args.next() {
-            if arg == "-Z" {
-                if let Some(arg) = extra_args.next() {
-                    other_options.push("-Z".to_owned());
-                    other_options.push(arg.to_owned());
-                }
-            }
-        }
-
-        if !config.targets.is_empty() {
-            other_options.extend(
-                config.targets.iter().flat_map(|it| ["--filter-platform".to_owned(), it.clone()]),
-            );
-        }
-        if no_deps {
-            other_options.push("--no-deps".to_owned());
-        }
-
-        let mut using_lockfile_copy = false;
-        // The manifest is a rust file, so this means its a script manifest
-        if cargo_toml.is_rust_manifest() {
-            other_options.push("-Zscript".to_owned());
-        } else if config
-            .toolchain_version
-            .as_ref()
-            .is_some_and(|v| *v >= MINIMUM_TOOLCHAIN_VERSION_SUPPORTING_LOCKFILE_PATH)
-        {
-            let lockfile = <_ as AsRef<Utf8Path>>::as_ref(cargo_toml).with_extension("lock");
-            let target_lockfile = config
-                .target_dir
-                .join("rust-analyzer")
-                .join("metadata")
-                .join(config.kind)
-                .join("Cargo.lock");
-            match std::fs::copy(&lockfile, &target_lockfile) {
-                Ok(_) => {
-                    using_lockfile_copy = true;
-                    other_options.push("--lockfile-path".to_owned());
-                    other_options.push(target_lockfile.to_string());
-                }
-                Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
-                    // There exists no lockfile yet
-                    using_lockfile_copy = true;
-                    other_options.push("--lockfile-path".to_owned());
-                    other_options.push(target_lockfile.to_string());
-                }
-                Err(e) => {
-                    tracing::warn!(
-                        "Failed to copy lock file from `{lockfile}` to `{target_lockfile}`: {e}",
-                    );
-                }
-            }
-        }
-        if using_lockfile_copy {
-            other_options.push("-Zunstable-options".to_owned());
-            meta.env("RUSTC_BOOTSTRAP", "1");
-        }
-        // No need to lock it if we copied the lockfile, we won't modify the original after all/
-        // This way cargo cannot error out on us if the lockfile requires updating.
-        if !using_lockfile_copy && locked {
-            other_options.push("--locked".to_owned());
-        }
-        meta.other_options(other_options);
-
-        // FIXME: Fetching metadata is a slow process, as it might require
-        // calling crates.io. We should be reporting progress here, but it's
-        // unclear whether cargo itself supports it.
-        progress("cargo metadata: started".to_owned());
-
-        let res = (|| -> anyhow::Result<(_, _)> {
-            let mut errored = false;
-            let output =
-                spawn_with_streaming_output(meta.cargo_command(), &mut |_| (), &mut |line| {
-                    errored = errored || line.starts_with("error") || line.starts_with("warning");
-                    if errored {
-                        progress("cargo metadata: ?".to_owned());
-                        return;
-                    }
-                    progress(format!("cargo metadata: {line}"));
-                })?;
-            if !output.status.success() {
-                progress(format!("cargo metadata: failed {}", output.status));
-                let error = cargo_metadata::Error::CargoMetadata {
-                    stderr: String::from_utf8(output.stderr)?,
-                }
-                .into();
-                if !no_deps {
-                    // If we failed to fetch metadata with deps, try again without them.
-                    // This makes r-a still work partially when offline.
-                    if let Ok((metadata, _)) = Self::fetch_metadata_(
-                        cargo_toml,
-                        current_dir,
-                        config,
-                        sysroot,
-                        true,
-                        locked,
-                        progress,
-                    ) {
-                        return Ok((metadata, Some(error)));
-                    }
-                }
-                return Err(error);
-            }
-            let stdout = from_utf8(&output.stdout)?
-                .lines()
-                .find(|line| line.starts_with('{'))
-                .ok_or(cargo_metadata::Error::NoJson)?;
-            Ok((cargo_metadata::MetadataCommand::parse(stdout)?, None))
-        })()
-        .with_context(|| format!("Failed to run `{:?}`", meta.cargo_command()));
-        progress("cargo metadata: finished".to_owned());
-        res
-    }
-
     pub fn new(
         mut meta: cargo_metadata::Metadata,
         ws_manifest_path: ManifestPath,
@@ -733,3 +549,214 @@ impl CargoWorkspace {
         self.requires_rustc_private
     }
 }
+
+pub(crate) struct FetchMetadata {
+    command: cargo_metadata::MetadataCommand,
+    lockfile_path: Option<Utf8PathBuf>,
+    kind: &'static str,
+    no_deps: bool,
+    no_deps_result: anyhow::Result<cargo_metadata::Metadata>,
+    other_options: Vec<String>,
+}
+
+impl FetchMetadata {
+    /// Builds a command to fetch metadata for the given `cargo_toml` manifest.
+    ///
+    /// Performs a lightweight pre-fetch using the `--no-deps` option,
+    /// available via [`FetchMetadata::no_deps_metadata`], to gather basic
+    /// information such as the `target-dir`.
+    ///
+    /// The provided sysroot is used to set the `RUSTUP_TOOLCHAIN`
+    /// environment variable when invoking Cargo, ensuring that the
+    /// rustup proxy selects the correct toolchain.
+    pub(crate) fn new(
+        cargo_toml: &ManifestPath,
+        current_dir: &AbsPath,
+        config: &CargoMetadataConfig,
+        sysroot: &Sysroot,
+        no_deps: bool,
+    ) -> Self {
+        let cargo = sysroot.tool(Tool::Cargo, current_dir, &config.extra_env);
+        let mut command = MetadataCommand::new();
+        command.cargo_path(cargo.get_program());
+        cargo.get_envs().for_each(|(var, val)| _ = command.env(var, val.unwrap_or_default()));
+        command.manifest_path(cargo_toml.to_path_buf());
+        match &config.features {
+            CargoFeatures::All => {
+                command.features(CargoOpt::AllFeatures);
+            }
+            CargoFeatures::Selected { features, no_default_features } => {
+                if *no_default_features {
+                    command.features(CargoOpt::NoDefaultFeatures);
+                }
+                if !features.is_empty() {
+                    command.features(CargoOpt::SomeFeatures(features.clone()));
+                }
+            }
+        }
+        command.current_dir(current_dir);
+
+        let mut needs_nightly = false;
+        let mut other_options = vec![];
+        // cargo metadata only supports a subset of flags of what cargo usually accepts, and usually
+        // the only relevant flags for metadata here are unstable ones, so we pass those along
+        // but nothing else
+        let mut extra_args = config.extra_args.iter();
+        while let Some(arg) = extra_args.next() {
+            if arg == "-Z" {
+                if let Some(arg) = extra_args.next() {
+                    needs_nightly = true;
+                    other_options.push("-Z".to_owned());
+                    other_options.push(arg.to_owned());
+                }
+            }
+        }
+
+        let mut lockfile_path = None;
+        if cargo_toml.is_rust_manifest() {
+            needs_nightly = true;
+            other_options.push("-Zscript".to_owned());
+        } else if config
+            .toolchain_version
+            .as_ref()
+            .is_some_and(|v| *v >= MINIMUM_TOOLCHAIN_VERSION_SUPPORTING_LOCKFILE_PATH)
+        {
+            lockfile_path = Some(<_ as AsRef<Utf8Path>>::as_ref(cargo_toml).with_extension("lock"));
+        }
+
+        if !config.targets.is_empty() {
+            other_options.extend(
+                config.targets.iter().flat_map(|it| ["--filter-platform".to_owned(), it.clone()]),
+            );
+        }
+
+        command.other_options(other_options.clone());
+
+        if needs_nightly {
+            command.env("RUSTC_BOOTSTRAP", "1");
+        }
+
+        // Pre-fetch basic metadata using `--no-deps`, which:
+        // - avoids fetching registries like crates.io,
+        // - skips dependency resolution and does not modify lockfiles,
+        // - and thus doesn't require progress reporting or copying lockfiles.
+        //
+        // Useful as a fast fallback to extract info like `target-dir`.
+        let cargo_command;
+        let no_deps_result = if no_deps {
+            command.no_deps();
+            cargo_command = command.cargo_command();
+            command.exec()
+        } else {
+            let mut no_deps_command = command.clone();
+            no_deps_command.no_deps();
+            cargo_command = no_deps_command.cargo_command();
+            no_deps_command.exec()
+        }
+        .with_context(|| format!("Failed to run `{cargo_command:?}`"));
+
+        Self { command, lockfile_path, kind: config.kind, no_deps, no_deps_result, other_options }
+    }
+
+    pub(crate) fn no_deps_metadata(&self) -> Option<&cargo_metadata::Metadata> {
+        self.no_deps_result.as_ref().ok()
+    }
+
+    /// Executes the metadata-fetching command.
+    ///
+    /// A successful result may still contain a metadata error if the full fetch failed,
+    /// but the fallback `--no-deps` pre-fetch succeeded during command construction.
+    pub(crate) fn exec(
+        self,
+        target_dir: &Utf8Path,
+        locked: bool,
+        progress: &dyn Fn(String),
+    ) -> anyhow::Result<(cargo_metadata::Metadata, Option<anyhow::Error>)> {
+        let Self { mut command, lockfile_path, kind, no_deps, no_deps_result, mut other_options } =
+            self;
+
+        if no_deps {
+            return no_deps_result.map(|m| (m, None));
+        }
+
+        let mut using_lockfile_copy = false;
+        // The manifest is a rust file, so this means its a script manifest
+        if let Some(lockfile) = lockfile_path {
+            let target_lockfile =
+                target_dir.join("rust-analyzer").join("metadata").join(kind).join("Cargo.lock");
+            match std::fs::copy(&lockfile, &target_lockfile) {
+                Ok(_) => {
+                    using_lockfile_copy = true;
+                    other_options.push("--lockfile-path".to_owned());
+                    other_options.push(target_lockfile.to_string());
+                }
+                Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
+                    // There exists no lockfile yet
+                    using_lockfile_copy = true;
+                    other_options.push("--lockfile-path".to_owned());
+                    other_options.push(target_lockfile.to_string());
+                }
+                Err(e) => {
+                    tracing::warn!(
+                        "Failed to copy lock file from `{lockfile}` to `{target_lockfile}`: {e}",
+                    );
+                }
+            }
+        }
+        if using_lockfile_copy {
+            other_options.push("-Zunstable-options".to_owned());
+            command.env("RUSTC_BOOTSTRAP", "1");
+        }
+        // No need to lock it if we copied the lockfile, we won't modify the original after all/
+        // This way cargo cannot error out on us if the lockfile requires updating.
+        if !using_lockfile_copy && locked {
+            other_options.push("--locked".to_owned());
+        }
+        command.other_options(other_options);
+
+        // FIXME: Fetching metadata is a slow process, as it might require
+        // calling crates.io. We should be reporting progress here, but it's
+        // unclear whether cargo itself supports it.
+        progress("cargo metadata: started".to_owned());
+
+        let res = (|| -> anyhow::Result<(_, _)> {
+            let mut errored = false;
+            let output =
+                spawn_with_streaming_output(command.cargo_command(), &mut |_| (), &mut |line| {
+                    errored = errored || line.starts_with("error") || line.starts_with("warning");
+                    if errored {
+                        progress("cargo metadata: ?".to_owned());
+                        return;
+                    }
+                    progress(format!("cargo metadata: {line}"));
+                })?;
+            if !output.status.success() {
+                progress(format!("cargo metadata: failed {}", output.status));
+                let error = cargo_metadata::Error::CargoMetadata {
+                    stderr: String::from_utf8(output.stderr)?,
+                }
+                .into();
+                if !no_deps {
+                    // If we failed to fetch metadata with deps, return pre-fetched result without them.
+                    // This makes r-a still work partially when offline.
+                    if let Ok(metadata) = no_deps_result {
+                        tracing::warn!(
+                            ?error,
+                            "`cargo metadata` failed and returning succeeded result with `--no-deps`"
+                        );
+                        return Ok((metadata, Some(error)));
+                    }
+                }
+                return Err(error);
+            }
+            let stdout = from_utf8(&output.stdout)?
+                .lines()
+                .find(|line| line.starts_with('{'))
+                .ok_or(cargo_metadata::Error::NoJson)?;
+            Ok((cargo_metadata::MetadataCommand::parse(stdout)?, None))
+        })()
+        .with_context(|| format!("Failed to run `{:?}`", command.cargo_command()));
+        progress("cargo metadata: finished".to_owned());
+        res
+    }
+}
diff --git a/src/tools/rust-analyzer/crates/project-model/src/env.rs b/src/tools/rust-analyzer/crates/project-model/src/env.rs
index 9e0415c3b39..d281492fc98 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/env.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/env.rs
@@ -1,10 +1,9 @@
 //! Cargo-like environment variables injection.
 use base_db::Env;
-use paths::{Utf8Path, Utf8PathBuf};
-use rustc_hash::FxHashMap;
+use paths::Utf8Path;
 use toolchain::Tool;
 
-use crate::{ManifestPath, PackageData, Sysroot, TargetKind, utf8_stdout};
+use crate::{ManifestPath, PackageData, TargetKind, cargo_config_file::CargoConfigFile};
 
 /// Recreates the compile-time environment variables that Cargo sets.
 ///
@@ -61,104 +60,68 @@ pub(crate) fn inject_rustc_tool_env(env: &mut Env, cargo_name: &str, kind: Targe
     env.set("CARGO_CRATE_NAME", cargo_name.replace('-', "_"));
 }
 
-pub(crate) fn cargo_config_env(
-    manifest: &ManifestPath,
-    extra_env: &FxHashMap<String, Option<String>>,
-    sysroot: &Sysroot,
-) -> Env {
-    let mut cargo_config = sysroot.tool(Tool::Cargo, manifest.parent(), extra_env);
-    cargo_config
-        .args(["-Z", "unstable-options", "config", "get", "env"])
-        .env("RUSTC_BOOTSTRAP", "1");
-    if manifest.is_rust_manifest() {
-        cargo_config.arg("-Zscript");
-    }
-    // if successful we receive `env.key.value = "value" per entry
-    tracing::debug!("Discovering cargo config env by {:?}", cargo_config);
-    utf8_stdout(&mut cargo_config)
-        .map(|stdout| parse_output_cargo_config_env(manifest, &stdout))
-        .inspect(|env| {
-            tracing::debug!("Discovered cargo config env: {:?}", env);
-        })
-        .inspect_err(|err| {
-            tracing::debug!("Failed to discover cargo config env: {:?}", err);
-        })
-        .unwrap_or_default()
-}
-
-fn parse_output_cargo_config_env(manifest: &ManifestPath, stdout: &str) -> Env {
+pub(crate) fn cargo_config_env(manifest: &ManifestPath, config: &Option<CargoConfigFile>) -> Env {
     let mut env = Env::default();
-    let mut relatives = vec![];
-    for (key, val) in
-        stdout.lines().filter_map(|l| l.strip_prefix("env.")).filter_map(|l| l.split_once(" = "))
-    {
-        let val = val.trim_matches('"').to_owned();
-        if let Some((key, modifier)) = key.split_once('.') {
-            match modifier {
-                "relative" => relatives.push((key, val)),
-                "value" => _ = env.insert(key, val),
-                _ => {
-                    tracing::warn!(
-                        "Unknown modifier in cargo config env: {}, expected `relative` or `value`",
-                        modifier
-                    );
-                    continue;
-                }
-            }
-        } else {
-            env.insert(key, val);
-        }
-    }
+    let Some(serde_json::Value::Object(env_json)) = config.as_ref().and_then(|c| c.get("env"))
+    else {
+        return env;
+    };
+
     // FIXME: The base here should be the parent of the `.cargo/config` file, not the manifest.
     // But cargo does not provide this information.
     let base = <_ as AsRef<Utf8Path>>::as_ref(manifest.parent());
-    for (key, relative) in relatives {
-        if relative != "true" {
+
+    for (key, entry) in env_json {
+        let serde_json::Value::Object(entry) = entry else {
             continue;
-        }
-        if let Some(suffix) = env.get(key) {
-            env.insert(key, base.join(suffix).to_string());
-        }
-    }
-    env
-}
+        };
+        let Some(value) = entry.get("value").and_then(|v| v.as_str()) else {
+            continue;
+        };
 
-pub(crate) fn cargo_config_build_target_dir(
-    manifest: &ManifestPath,
-    extra_env: &FxHashMap<String, Option<String>>,
-    sysroot: &Sysroot,
-) -> Option<Utf8PathBuf> {
-    let mut cargo_config = sysroot.tool(Tool::Cargo, manifest.parent(), extra_env);
-    cargo_config
-        .args(["-Z", "unstable-options", "config", "get", "build.target-dir"])
-        .env("RUSTC_BOOTSTRAP", "1");
-    if manifest.is_rust_manifest() {
-        cargo_config.arg("-Zscript");
+        let value = if entry
+            .get("relative")
+            .and_then(|v| v.as_bool())
+            .is_some_and(std::convert::identity)
+        {
+            base.join(value).to_string()
+        } else {
+            value.to_owned()
+        };
+        env.insert(key, value);
     }
-    utf8_stdout(&mut cargo_config)
-        .map(|stdout| {
-            Utf8Path::new(stdout.trim_start_matches("build.target-dir = ").trim_matches('"'))
-                .to_owned()
-        })
-        .ok()
+
+    env
 }
 
 #[test]
 fn parse_output_cargo_config_env_works() {
-    let stdout = r#"
-env.CARGO_WORKSPACE_DIR.relative = true
-env.CARGO_WORKSPACE_DIR.value = ""
-env.RELATIVE.relative = true
-env.RELATIVE.value = "../relative"
-env.INVALID.relative = invalidbool
-env.INVALID.value = "../relative"
-env.TEST.value = "test"
-"#
-    .trim();
+    let raw = r#"
+{
+  "env": {
+    "CARGO_WORKSPACE_DIR": {
+      "relative": true,
+      "value": ""
+    },
+    "INVALID": {
+      "relative": "invalidbool",
+      "value": "../relative"
+    },
+    "RELATIVE": {
+      "relative": true,
+      "value": "../relative"
+    },
+    "TEST": {
+      "value": "test"
+    }
+  }
+}
+"#;
+    let config: CargoConfigFile = serde_json::from_str(raw).unwrap();
     let cwd = paths::Utf8PathBuf::try_from(std::env::current_dir().unwrap()).unwrap();
     let manifest = paths::AbsPathBuf::assert(cwd.join("Cargo.toml"));
     let manifest = ManifestPath::try_from(manifest).unwrap();
-    let env = parse_output_cargo_config_env(&manifest, stdout);
+    let env = cargo_config_env(&manifest, &Some(config));
     assert_eq!(env.get("CARGO_WORKSPACE_DIR").as_deref(), Some(cwd.join("").as_str()));
     assert_eq!(env.get("RELATIVE").as_deref(), Some(cwd.join("../relative").as_str()));
     assert_eq!(env.get("INVALID").as_deref(), Some("../relative"));
diff --git a/src/tools/rust-analyzer/crates/project-model/src/lib.rs b/src/tools/rust-analyzer/crates/project-model/src/lib.rs
index 436af64cf13..3bf3d06e6b1 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/lib.rs
@@ -24,7 +24,7 @@ pub mod toolchain_info {
 
     use std::path::Path;
 
-    use crate::{ManifestPath, Sysroot};
+    use crate::{ManifestPath, Sysroot, cargo_config_file::CargoConfigFile};
 
     #[derive(Copy, Clone)]
     pub enum QueryConfig<'a> {
@@ -32,11 +32,12 @@ pub mod toolchain_info {
         Rustc(&'a Sysroot, &'a Path),
         /// Attempt to use cargo to query the desired information, honoring cargo configurations.
         /// If this fails, falls back to invoking `rustc` directly.
-        Cargo(&'a Sysroot, &'a ManifestPath),
+        Cargo(&'a Sysroot, &'a ManifestPath, &'a Option<CargoConfigFile>),
     }
 }
 
 mod build_dependencies;
+mod cargo_config_file;
 mod cargo_workspace;
 mod env;
 mod manifest_path;
diff --git a/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs b/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs
index 9f19260d309..9781c46737d 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/sysroot.rs
@@ -9,14 +9,15 @@ use std::{env, fs, ops::Not, path::Path, process::Command};
 
 use anyhow::{Result, format_err};
 use itertools::Itertools;
-use paths::{AbsPath, AbsPathBuf, Utf8PathBuf};
+use paths::{AbsPath, AbsPathBuf, Utf8Path, Utf8PathBuf};
 use rustc_hash::FxHashMap;
 use stdx::format_to;
 use toolchain::{Tool, probe_for_binary};
 
 use crate::{
     CargoWorkspace, ManifestPath, ProjectJson, RustSourceWorkspaceConfig,
-    cargo_workspace::CargoMetadataConfig, utf8_stdout,
+    cargo_workspace::{CargoMetadataConfig, FetchMetadata},
+    utf8_stdout,
 };
 
 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -211,6 +212,7 @@ impl Sysroot {
         sysroot_source_config: &RustSourceWorkspaceConfig,
         no_deps: bool,
         current_dir: &AbsPath,
+        target_dir: &Utf8Path,
         progress: &dyn Fn(String),
     ) -> Option<RustLibSrcWorkspace> {
         assert!(matches!(self.workspace, RustLibSrcWorkspace::Empty), "workspace already loaded");
@@ -224,6 +226,7 @@ impl Sysroot {
                 match self.load_library_via_cargo(
                     &library_manifest,
                     current_dir,
+                    target_dir,
                     cargo_config,
                     no_deps,
                     progress,
@@ -319,6 +322,7 @@ impl Sysroot {
         &self,
         library_manifest: &ManifestPath,
         current_dir: &AbsPath,
+        target_dir: &Utf8Path,
         cargo_config: &CargoMetadataConfig,
         no_deps: bool,
         progress: &dyn Fn(String),
@@ -331,16 +335,11 @@ impl Sysroot {
             Some("nightly".to_owned()),
         );
 
-        let (mut res, _) = CargoWorkspace::fetch_metadata(
-            library_manifest,
-            current_dir,
-            &cargo_config,
-            self,
-            no_deps,
-            // Make sure we never attempt to write to the sysroot
-            true,
-            progress,
-        )?;
+        // Make sure we never attempt to write to the sysroot
+        let locked = true;
+        let (mut res, _) =
+            FetchMetadata::new(library_manifest, current_dir, &cargo_config, self, no_deps)
+                .exec(target_dir, locked, progress)?;
 
         // Patch out `rustc-std-workspace-*` crates to point to the real crates.
         // This is done prior to `CrateGraph` construction to prevent de-duplication logic from failing.
diff --git a/src/tools/rust-analyzer/crates/project-model/src/tests.rs b/src/tools/rust-analyzer/crates/project-model/src/tests.rs
index f229e9a650d..ed72520f40d 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/tests.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/tests.rs
@@ -239,8 +239,13 @@ fn smoke_test_real_sysroot_cargo() {
     );
     let cwd = AbsPathBuf::assert_utf8(temp_dir().join("smoke_test_real_sysroot_cargo"));
     std::fs::create_dir_all(&cwd).unwrap();
-    let loaded_sysroot =
-        sysroot.load_workspace(&RustSourceWorkspaceConfig::default_cargo(), false, &cwd, &|_| ());
+    let loaded_sysroot = sysroot.load_workspace(
+        &RustSourceWorkspaceConfig::default_cargo(),
+        false,
+        &cwd,
+        &Utf8PathBuf::default(),
+        &|_| (),
+    );
     if let Some(loaded_sysroot) = loaded_sysroot {
         sysroot.set_workspace(loaded_sysroot);
     }
diff --git a/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/rustc_cfg.rs b/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/rustc_cfg.rs
index a77f76797fc..6e06e88bf7a 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/rustc_cfg.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/rustc_cfg.rs
@@ -63,7 +63,7 @@ fn rustc_print_cfg(
 ) -> anyhow::Result<String> {
     const RUSTC_ARGS: [&str; 2] = ["--print", "cfg"];
     let (sysroot, current_dir) = match config {
-        QueryConfig::Cargo(sysroot, cargo_toml) => {
+        QueryConfig::Cargo(sysroot, cargo_toml, _) => {
             let mut cmd = sysroot.tool(Tool::Cargo, cargo_toml.parent(), extra_env);
             cmd.args(["rustc", "-Z", "unstable-options"]).args(RUSTC_ARGS);
             if let Some(target) = target {
@@ -109,7 +109,7 @@ mod tests {
         let sysroot = Sysroot::empty();
         let manifest_path =
             ManifestPath::try_from(AbsPathBuf::assert(Utf8PathBuf::from(manifest_path))).unwrap();
-        let cfg = QueryConfig::Cargo(&sysroot, &manifest_path);
+        let cfg = QueryConfig::Cargo(&sysroot, &manifest_path, &None);
         assert_ne!(get(cfg, None, &FxHashMap::default()), vec![]);
     }
 
diff --git a/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/target_data_layout.rs b/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/target_data_layout.rs
index a4d0ec69537..a28f468e692 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/target_data_layout.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/target_data_layout.rs
@@ -20,7 +20,7 @@ pub fn get(
             })
     };
     let (sysroot, current_dir) = match config {
-        QueryConfig::Cargo(sysroot, cargo_toml) => {
+        QueryConfig::Cargo(sysroot, cargo_toml, _) => {
             let mut cmd = sysroot.tool(Tool::Cargo, cargo_toml.parent(), extra_env);
             cmd.env("RUSTC_BOOTSTRAP", "1");
             cmd.args(["rustc", "-Z", "unstable-options"]).args(RUSTC_ARGS).args([
@@ -66,7 +66,7 @@ mod tests {
         let sysroot = Sysroot::empty();
         let manifest_path =
             ManifestPath::try_from(AbsPathBuf::assert(Utf8PathBuf::from(manifest_path))).unwrap();
-        let cfg = QueryConfig::Cargo(&sysroot, &manifest_path);
+        let cfg = QueryConfig::Cargo(&sysroot, &manifest_path, &None);
         assert!(get(cfg, None, &FxHashMap::default()).is_ok());
     }
 
diff --git a/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/target_tuple.rs b/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/target_tuple.rs
index f6ab8532197..9f12ededb61 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/target_tuple.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/target_tuple.rs
@@ -5,7 +5,9 @@ use anyhow::Context;
 use rustc_hash::FxHashMap;
 use toolchain::Tool;
 
-use crate::{ManifestPath, Sysroot, toolchain_info::QueryConfig, utf8_stdout};
+use crate::{
+    Sysroot, cargo_config_file::CargoConfigFile, toolchain_info::QueryConfig, utf8_stdout,
+};
 
 /// For cargo, runs `cargo -Zunstable-options config get build.target` to get the configured project target(s).
 /// For rustc, runs `rustc --print -vV` to get the host target.
@@ -20,8 +22,8 @@ pub fn get(
     }
 
     let (sysroot, current_dir) = match config {
-        QueryConfig::Cargo(sysroot, cargo_toml) => {
-            match cargo_config_build_target(cargo_toml, extra_env, sysroot) {
+        QueryConfig::Cargo(sysroot, cargo_toml, config_file) => {
+            match config_file.as_ref().and_then(cargo_config_build_target) {
                 Some(it) => return Ok(it),
                 None => (sysroot, cargo_toml.parent().as_ref()),
             }
@@ -50,30 +52,30 @@ fn rustc_discover_host_tuple(
     }
 }
 
-fn cargo_config_build_target(
-    cargo_toml: &ManifestPath,
-    extra_env: &FxHashMap<String, Option<String>>,
-    sysroot: &Sysroot,
-) -> Option<Vec<String>> {
-    let mut cmd = sysroot.tool(Tool::Cargo, cargo_toml.parent(), extra_env);
-    cmd.current_dir(cargo_toml.parent()).env("RUSTC_BOOTSTRAP", "1");
-    cmd.args(["-Z", "unstable-options", "config", "get", "build.target"]);
-    // if successful we receive `build.target = "target-tuple"`
-    // or `build.target = ["<target 1>", ..]`
-    // this might be `error: config value `build.target` is not set` in which case we
-    // don't wanna log the error
-    utf8_stdout(&mut cmd).and_then(parse_output_cargo_config_build_target).ok()
+fn cargo_config_build_target(config: &CargoConfigFile) -> Option<Vec<String>> {
+    match parse_json_cargo_config_build_target(config) {
+        Ok(v) => v,
+        Err(e) => {
+            tracing::debug!("Failed to discover cargo config build target {e:?}");
+            None
+        }
+    }
 }
 
 // Parses `"build.target = [target-tuple, target-tuple, ...]"` or `"build.target = "target-tuple"`
-fn parse_output_cargo_config_build_target(stdout: String) -> anyhow::Result<Vec<String>> {
-    let trimmed = stdout.trim_start_matches("build.target = ").trim_matches('"');
-
-    if !trimmed.starts_with('[') {
-        return Ok([trimmed.to_owned()].to_vec());
+fn parse_json_cargo_config_build_target(
+    config: &CargoConfigFile,
+) -> anyhow::Result<Option<Vec<String>>> {
+    let target = config.get("build").and_then(|v| v.as_object()).and_then(|m| m.get("target"));
+    match target {
+        Some(serde_json::Value::String(s)) => Ok(Some(vec![s.to_owned()])),
+        Some(v) => serde_json::from_value(v.clone())
+            .map(Option::Some)
+            .context("Failed to parse `build.target` as an array of target"),
+        // t`error: config value `build.target` is not set`, in which case we
+        // don't wanna log the error
+        None => Ok(None),
     }
-
-    serde_json::from_str(trimmed).context("Failed to parse `build.target` as an array of target")
 }
 
 #[cfg(test)]
@@ -90,7 +92,7 @@ mod tests {
         let sysroot = Sysroot::empty();
         let manifest_path =
             ManifestPath::try_from(AbsPathBuf::assert(Utf8PathBuf::from(manifest_path))).unwrap();
-        let cfg = QueryConfig::Cargo(&sysroot, &manifest_path);
+        let cfg = QueryConfig::Cargo(&sysroot, &manifest_path, &None);
         assert!(get(cfg, None, &FxHashMap::default()).is_ok());
     }
 
diff --git a/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/version.rs b/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/version.rs
index 91ba8598591..357053d8e82 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/version.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/toolchain_info/version.rs
@@ -12,7 +12,7 @@ pub(crate) fn get(
     extra_env: &FxHashMap<String, Option<String>>,
 ) -> Result<Option<Version>, anyhow::Error> {
     let (mut cmd, prefix) = match config {
-        QueryConfig::Cargo(sysroot, cargo_toml) => {
+        QueryConfig::Cargo(sysroot, cargo_toml, _) => {
             (sysroot.tool(Tool::Cargo, cargo_toml.parent(), extra_env), "cargo ")
         }
         QueryConfig::Rustc(sysroot, current_dir) => {
@@ -44,7 +44,7 @@ mod tests {
         let sysroot = Sysroot::empty();
         let manifest_path =
             ManifestPath::try_from(AbsPathBuf::assert(Utf8PathBuf::from(manifest_path))).unwrap();
-        let cfg = QueryConfig::Cargo(&sysroot, &manifest_path);
+        let cfg = QueryConfig::Cargo(&sysroot, &manifest_path, &None);
         assert!(get(cfg, &FxHashMap::default()).is_ok());
     }
 
diff --git a/src/tools/rust-analyzer/crates/project-model/src/workspace.rs b/src/tools/rust-analyzer/crates/project-model/src/workspace.rs
index 43db84b4fa3..677f29e3c60 100644
--- a/src/tools/rust-analyzer/crates/project-model/src/workspace.rs
+++ b/src/tools/rust-analyzer/crates/project-model/src/workspace.rs
@@ -25,11 +25,9 @@ use crate::{
     ProjectJson, ProjectManifest, RustSourceWorkspaceConfig, Sysroot, TargetData, TargetKind,
     WorkspaceBuildScripts,
     build_dependencies::BuildScriptOutput,
-    cargo_workspace::{CargoMetadataConfig, DepKind, PackageData, RustLibSource},
-    env::{
-        cargo_config_build_target_dir, cargo_config_env, inject_cargo_env,
-        inject_cargo_package_env, inject_rustc_tool_env,
-    },
+    cargo_config_file,
+    cargo_workspace::{CargoMetadataConfig, DepKind, FetchMetadata, PackageData, RustLibSource},
+    env::{cargo_config_env, inject_cargo_env, inject_cargo_package_env, inject_rustc_tool_env},
     project_json::{Crate, CrateArrayIdx},
     sysroot::RustLibSrcWorkspace,
     toolchain_info::{QueryConfig, rustc_cfg, target_data_layout, target_tuple, version},
@@ -270,7 +268,9 @@ impl ProjectWorkspace {
 
         tracing::info!(workspace = %cargo_toml, src_root = ?sysroot.rust_lib_src_root(), root = ?sysroot.root(), "Using sysroot");
         progress("querying project metadata".to_owned());
-        let toolchain_config = QueryConfig::Cargo(&sysroot, cargo_toml);
+        let config_file = cargo_config_file::read(cargo_toml, extra_env, &sysroot);
+        let config_file_ = config_file.clone();
+        let toolchain_config = QueryConfig::Cargo(&sysroot, cargo_toml, &config_file_);
         let targets =
             target_tuple::get(toolchain_config, target.as_deref(), extra_env).unwrap_or_default();
         let toolchain = version::get(toolchain_config, extra_env)
@@ -282,10 +282,24 @@ impl ProjectWorkspace {
             .ok()
             .flatten();
 
+        let fetch_metadata = FetchMetadata::new(
+            cargo_toml,
+            workspace_dir,
+            &CargoMetadataConfig {
+                features: features.clone(),
+                targets: targets.clone(),
+                extra_args: extra_args.clone(),
+                extra_env: extra_env.clone(),
+                toolchain_version: toolchain.clone(),
+                kind: "workspace",
+            },
+            &sysroot,
+            *no_deps,
+        );
         let target_dir = config
             .target_dir
             .clone()
-            .or_else(|| cargo_config_build_target_dir(cargo_toml, extra_env, &sysroot))
+            .or_else(|| fetch_metadata.no_deps_metadata().map(|m| m.target_directory.clone()))
             .unwrap_or_else(|| workspace_dir.join("target").into());
 
         // We spawn a bunch of processes to query various information about the workspace's
@@ -319,7 +333,7 @@ impl ProjectWorkspace {
                 };
                 rustc_dir.and_then(|rustc_dir| {
                     info!(workspace = %cargo_toml, rustc_dir = %rustc_dir, "Using rustc source");
-                    match CargoWorkspace::fetch_metadata(
+                    match FetchMetadata::new(
                         &rustc_dir,
                         workspace_dir,
                         &CargoMetadataConfig {
@@ -327,15 +341,12 @@ impl ProjectWorkspace {
                             targets: targets.clone(),
                             extra_args: extra_args.clone(),
                             extra_env: extra_env.clone(),
-                            target_dir: target_dir.clone(),
                             toolchain_version: toolchain.clone(),
                             kind: "rustc-dev"
                         },
                         &sysroot,
                         *no_deps,
-                        true,
-                        progress,
-                    ) {
+                    ).exec(&target_dir, true, progress) {
                         Ok((meta, _error)) => {
                             let workspace = CargoWorkspace::new(
                                 meta,
@@ -364,40 +375,22 @@ impl ProjectWorkspace {
                 })
             });
 
-            let cargo_metadata = s.spawn(|| {
-                CargoWorkspace::fetch_metadata(
-                    cargo_toml,
-                    workspace_dir,
-                    &CargoMetadataConfig {
-                        features: features.clone(),
-                        targets: targets.clone(),
-                        extra_args: extra_args.clone(),
-                        extra_env: extra_env.clone(),
-                        target_dir: target_dir.clone(),
-                        toolchain_version: toolchain.clone(),
-                        kind: "workspace",
-                    },
-                    &sysroot,
-                    *no_deps,
-                    false,
-                    progress,
-                )
-            });
+            let cargo_metadata = s.spawn(|| fetch_metadata.exec(&target_dir, false, progress));
             let loaded_sysroot = s.spawn(|| {
                 sysroot.load_workspace(
                     &RustSourceWorkspaceConfig::CargoMetadata(sysroot_metadata_config(
                         config,
                         &targets,
                         toolchain.clone(),
-                        target_dir.clone(),
                     )),
                     config.no_deps,
                     workspace_dir,
+                    &target_dir,
                     progress,
                 )
             });
             let cargo_config_extra_env =
-                s.spawn(|| cargo_config_env(cargo_toml, extra_env, &sysroot));
+                s.spawn(move || cargo_config_env(cargo_toml, &config_file));
             thread::Result::Ok((
                 rustc_cfg.join()?,
                 data_layout.join()?,
@@ -476,9 +469,7 @@ impl ProjectWorkspace {
         let target_dir = config
             .target_dir
             .clone()
-            .or_else(|| {
-                cargo_config_build_target_dir(project_json.manifest()?, &config.extra_env, &sysroot)
-            })
+            .or_else(|| cargo_target_dir(project_json.manifest()?, &config.extra_env, &sysroot))
             .unwrap_or_else(|| project_root.join("target").into());
 
         // We spawn a bunch of processes to query various information about the workspace's
@@ -502,6 +493,7 @@ impl ProjectWorkspace {
                         &RustSourceWorkspaceConfig::Json(*sysroot_project),
                         config.no_deps,
                         project_root,
+                        &target_dir,
                         progress,
                     )
                 } else {
@@ -510,10 +502,10 @@ impl ProjectWorkspace {
                             config,
                             &targets,
                             toolchain.clone(),
-                            target_dir,
                         )),
                         config.no_deps,
                         project_root,
+                        &target_dir,
                         progress,
                     )
                 }
@@ -554,7 +546,8 @@ impl ProjectWorkspace {
             None => Sysroot::empty(),
         };
 
-        let query_config = QueryConfig::Cargo(&sysroot, detached_file);
+        let config_file = cargo_config_file::read(detached_file, &config.extra_env, &sysroot);
+        let query_config = QueryConfig::Cargo(&sysroot, detached_file, &config_file);
         let toolchain = version::get(query_config, &config.extra_env).ok().flatten();
         let targets = target_tuple::get(query_config, config.target.as_deref(), &config.extra_env)
             .unwrap_or_default();
@@ -563,7 +556,7 @@ impl ProjectWorkspace {
         let target_dir = config
             .target_dir
             .clone()
-            .or_else(|| cargo_config_build_target_dir(detached_file, &config.extra_env, &sysroot))
+            .or_else(|| cargo_target_dir(detached_file, &config.extra_env, &sysroot))
             .unwrap_or_else(|| dir.join("target").into());
 
         let loaded_sysroot = sysroot.load_workspace(
@@ -571,17 +564,17 @@ impl ProjectWorkspace {
                 config,
                 &targets,
                 toolchain.clone(),
-                target_dir.clone(),
             )),
             config.no_deps,
             dir,
+            &target_dir,
             &|_| (),
         );
         if let Some(loaded_sysroot) = loaded_sysroot {
             sysroot.set_workspace(loaded_sysroot);
         }
 
-        let cargo_script = CargoWorkspace::fetch_metadata(
+        let fetch_metadata = FetchMetadata::new(
             detached_file,
             dir,
             &CargoMetadataConfig {
@@ -589,25 +582,26 @@ impl ProjectWorkspace {
                 targets,
                 extra_args: config.extra_args.clone(),
                 extra_env: config.extra_env.clone(),
-                target_dir,
                 toolchain_version: toolchain.clone(),
                 kind: "detached-file",
             },
             &sysroot,
             config.no_deps,
-            false,
-            &|_| (),
-        )
-        .ok()
-        .map(|(ws, error)| {
-            let cargo_config_extra_env =
-                cargo_config_env(detached_file, &config.extra_env, &sysroot);
-            (
-                CargoWorkspace::new(ws, detached_file.clone(), cargo_config_extra_env, false),
-                WorkspaceBuildScripts::default(),
-                error.map(Arc::new),
-            )
-        });
+        );
+        let target_dir = config
+            .target_dir
+            .clone()
+            .or_else(|| fetch_metadata.no_deps_metadata().map(|m| m.target_directory.clone()))
+            .unwrap_or_else(|| dir.join("target").into());
+        let cargo_script =
+            fetch_metadata.exec(&target_dir, false, &|_| ()).ok().map(|(ws, error)| {
+                let cargo_config_extra_env = cargo_config_env(detached_file, &config_file);
+                (
+                    CargoWorkspace::new(ws, detached_file.clone(), cargo_config_extra_env, false),
+                    WorkspaceBuildScripts::default(),
+                    error.map(Arc::new),
+                )
+            });
 
         Ok(ProjectWorkspace {
             kind: ProjectWorkspaceKind::DetachedFile {
@@ -1889,15 +1883,33 @@ fn sysroot_metadata_config(
     config: &CargoConfig,
     targets: &[String],
     toolchain_version: Option<Version>,
-    target_dir: Utf8PathBuf,
 ) -> CargoMetadataConfig {
     CargoMetadataConfig {
         features: Default::default(),
         targets: targets.to_vec(),
         extra_args: Default::default(),
         extra_env: config.extra_env.clone(),
-        target_dir,
         toolchain_version,
         kind: "sysroot",
     }
 }
+
+fn cargo_target_dir(
+    manifest: &ManifestPath,
+    extra_env: &FxHashMap<String, Option<String>>,
+    sysroot: &Sysroot,
+) -> Option<Utf8PathBuf> {
+    let cargo = sysroot.tool(Tool::Cargo, manifest.parent(), extra_env);
+    let mut meta = cargo_metadata::MetadataCommand::new();
+    meta.cargo_path(cargo.get_program());
+    meta.manifest_path(manifest);
+    // `--no-deps` doesn't (over)write lockfiles as it doesn't do any package resolve.
+    // So we can use it to get `target_directory` before copying lockfiles
+    let mut other_options = vec!["--no-deps".to_owned()];
+    if manifest.is_rust_manifest() {
+        meta.env("RUSTC_BOOTSTRAP", "1");
+        other_options.push("-Zscript".to_owned());
+    }
+    meta.other_options(other_options);
+    meta.exec().map(|m| m.target_directory).ok()
+}
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/analysis_stats.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/analysis_stats.rs
index 0ee01982fea..fc89f486f84 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/analysis_stats.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/analysis_stats.rs
@@ -796,7 +796,7 @@ impl flags::AnalysisStats {
             // region:expressions
             let (previous_exprs, previous_unknown, previous_partially_unknown) =
                 (num_exprs, num_exprs_unknown, num_exprs_partially_unknown);
-            for (expr_id, _) in body.exprs.iter() {
+            for (expr_id, _) in body.exprs() {
                 let ty = &inference_result[expr_id];
                 num_exprs += 1;
                 let unknown_or_partial = if ty.is_unknown() {
@@ -901,7 +901,7 @@ impl flags::AnalysisStats {
             // region:patterns
             let (previous_pats, previous_unknown, previous_partially_unknown) =
                 (num_pats, num_pats_unknown, num_pats_partially_unknown);
-            for (pat_id, _) in body.pats.iter() {
+            for (pat_id, _) in body.pats() {
                 let ty = &inference_result[pat_id];
                 num_pats += 1;
                 let unknown_or_partial = if ty.is_unknown() {
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/rustc_tests.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/rustc_tests.rs
index f97bf832442..30ac93fb6f8 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/rustc_tests.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/rustc_tests.rs
@@ -9,6 +9,7 @@ use hir::{ChangeWithProcMacros, Crate};
 use ide::{AnalysisHost, DiagnosticCode, DiagnosticsConfig};
 use ide_db::base_db;
 use itertools::Either;
+use paths::Utf8PathBuf;
 use profile::StopWatch;
 use project_model::toolchain_info::{QueryConfig, target_data_layout};
 use project_model::{
@@ -79,6 +80,7 @@ impl Tester {
             &RustSourceWorkspaceConfig::default_cargo(),
             false,
             &path,
+            &Utf8PathBuf::default(),
             &|_| (),
         );
         if let Some(loaded_sysroot) = loaded_sysroot {
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/scip.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/scip.rs
index d258c5d8191..37f83f6dee6 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/scip.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/cli/scip.rs
@@ -25,7 +25,7 @@ impl flags::Scip {
         eprintln!("Generating SCIP start...");
         let now = Instant::now();
 
-        let no_progress = &|s| (eprintln!("rust-analyzer: Loading {s}"));
+        let no_progress = &|s| eprintln!("rust-analyzer: Loading {s}");
         let root =
             vfs::AbsPathBuf::assert_utf8(std::env::current_dir()?.join(&self.path)).normalize();
 
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp/to_proto.rs b/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp/to_proto.rs
index 8a848fb848c..292be1d5315 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp/to_proto.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/src/lsp/to_proto.rs
@@ -911,7 +911,8 @@ pub(crate) fn folding_range(
         | FoldKind::Array
         | FoldKind::TraitAliases
         | FoldKind::ExternCrates
-        | FoldKind::MatchArm => None,
+        | FoldKind::MatchArm
+        | FoldKind::Function => None,
     };
 
     let range = range(line_index, fold.range);
diff --git a/src/tools/rust-analyzer/crates/rust-analyzer/tests/slow-tests/main.rs b/src/tools/rust-analyzer/crates/rust-analyzer/tests/slow-tests/main.rs
index 59073af983b..1b940c70da6 100644
--- a/src/tools/rust-analyzer/crates/rust-analyzer/tests/slow-tests/main.rs
+++ b/src/tools/rust-analyzer/crates/rust-analyzer/tests/slow-tests/main.rs
@@ -880,7 +880,8 @@ fn main() {{}}
 
 #[test]
 fn diagnostics_dont_block_typing() {
-    if skip_slow_tests() {
+    if skip_slow_tests() || std::env::var("CI").is_ok() {
+        // FIXME: This test is failing too frequently (therefore we disable it on CI).
         return;
     }
 
diff --git a/src/tools/rust-analyzer/crates/span/src/ast_id.rs b/src/tools/rust-analyzer/crates/span/src/ast_id.rs
index 121d2e33243..a9288ecd6fa 100644
--- a/src/tools/rust-analyzer/crates/span/src/ast_id.rs
+++ b/src/tools/rust-analyzer/crates/span/src/ast_id.rs
@@ -92,6 +92,7 @@ impl fmt::Debug for ErasedFileAstId {
             Use,
             Impl,
             BlockExpr,
+            AsmExpr,
             Fixup,
         );
         if f.alternate() {
@@ -144,6 +145,10 @@ enum ErasedFileAstIdKind {
     Impl,
     /// Associated with [`BlockExprFileAstId`].
     BlockExpr,
+    // `global_asm!()` is an item, so we need to give it an `AstId`. So we give to all inline asm
+    // because incrementality is not a problem, they will always be the only item in the macro file,
+    // and memory usage also not because they're rare.
+    AsmExpr,
     /// Keep this last.
     Root,
 }
@@ -204,14 +209,17 @@ impl ErasedFileAstId {
             .or_else(|| extern_block_ast_id(node, index_map))
             .or_else(|| use_ast_id(node, index_map))
             .or_else(|| impl_ast_id(node, index_map))
+            .or_else(|| asm_expr_ast_id(node, index_map))
     }
 
     fn should_alloc(node: &SyntaxNode) -> bool {
-        should_alloc_has_name(node)
-            || should_alloc_assoc_item(node)
-            || ast::ExternBlock::can_cast(node.kind())
-            || ast::Use::can_cast(node.kind())
-            || ast::Impl::can_cast(node.kind())
+        let kind = node.kind();
+        should_alloc_has_name(kind)
+            || should_alloc_assoc_item(kind)
+            || ast::ExternBlock::can_cast(kind)
+            || ast::Use::can_cast(kind)
+            || ast::Impl::can_cast(kind)
+            || ast::AsmExpr::can_cast(kind)
     }
 
     #[inline]
@@ -278,7 +286,6 @@ impl<N> FileAstId<N> {
 
 #[derive(Hash)]
 struct ErasedHasNameFileAstId<'a> {
-    kind: SyntaxKind,
     name: &'a str,
 }
 
@@ -332,6 +339,19 @@ fn use_ast_id(
     }
 }
 
+impl AstIdNode for ast::AsmExpr {}
+
+fn asm_expr_ast_id(
+    node: &SyntaxNode,
+    index_map: &mut ErasedAstIdNextIndexMap,
+) -> Option<ErasedFileAstId> {
+    if ast::AsmExpr::can_cast(node.kind()) {
+        Some(index_map.new_id(ErasedFileAstIdKind::AsmExpr, ()))
+    } else {
+        None
+    }
+}
+
 impl AstIdNode for ast::Impl {}
 
 fn impl_ast_id(
@@ -433,7 +453,6 @@ macro_rules! register_has_name_ast_id {
         )+
 
         fn has_name_ast_id(node: &SyntaxNode, index_map: &mut ErasedAstIdNextIndexMap) -> Option<ErasedFileAstId> {
-            let kind = node.kind();
             match_ast! {
                 match node {
                     $(
@@ -441,7 +460,6 @@ macro_rules! register_has_name_ast_id {
                             let name = node.$name_method();
                             let name = name.as_ref().map_or("", |it| it.text_non_mutable());
                             let result = ErasedHasNameFileAstId {
-                                kind,
                                 name,
                             };
                             Some(index_map.new_id(ErasedFileAstIdKind::$ident, result))
@@ -452,8 +470,7 @@ macro_rules! register_has_name_ast_id {
             }
         }
 
-        fn should_alloc_has_name(node: &SyntaxNode) -> bool {
-            let kind = node.kind();
+        fn should_alloc_has_name(kind: SyntaxKind) -> bool {
             false $( || ast::$ident::can_cast(kind) )*
         }
     };
@@ -483,7 +500,6 @@ macro_rules! register_assoc_item_ast_id {
             index_map: &mut ErasedAstIdNextIndexMap,
             parent: Option<&ErasedFileAstId>,
         ) -> Option<ErasedFileAstId> {
-            let kind = node.kind();
             match_ast! {
                 match node {
                     $(
@@ -491,7 +507,6 @@ macro_rules! register_assoc_item_ast_id {
                             let name = $name_callback(node);
                             let name = name.as_ref().map_or("", |it| it.text_non_mutable());
                             let properties = ErasedHasNameFileAstId {
-                                kind,
                                 name,
                             };
                             let result = ErasedAssocItemFileAstId {
@@ -506,8 +521,7 @@ macro_rules! register_assoc_item_ast_id {
             }
         }
 
-        fn should_alloc_assoc_item(node: &SyntaxNode) -> bool {
-            let kind = node.kind();
+        fn should_alloc_assoc_item(kind: SyntaxKind) -> bool {
             false $( || ast::$ident::can_cast(kind) )*
         }
     };
diff --git a/src/tools/rust-analyzer/crates/syntax/rust.ungram b/src/tools/rust-analyzer/crates/syntax/rust.ungram
index 3f439472337..4cbc88cfb5e 100644
--- a/src/tools/rust-analyzer/crates/syntax/rust.ungram
+++ b/src/tools/rust-analyzer/crates/syntax/rust.ungram
@@ -158,6 +158,7 @@ Item =
 | TypeAlias
 | Union
 | Use
+| AsmExpr
 
 MacroRules =
   Attr* Visibility?
@@ -409,7 +410,8 @@ OffsetOfExpr =
 // global_asm := "global_asm!(" format_string *("," format_string) *("," operand) [","] ")"
 // format_string := STRING_LITERAL / RAW_STRING_LITERAL
 AsmExpr =
-  Attr* 'builtin' '#' 'asm' '(' template:(Expr (',' Expr)*) (AsmPiece (',' AsmPiece)*)? ','? ')'
+  Attr* 'builtin' '#' ( 'asm' | 'global_asm' | 'naked_asm' )
+  '(' template:(Expr (',' Expr)*) (AsmPiece (',' AsmPiece)*)? ','? ')'
 
 // operand_expr := expr / "_" / expr "=>" expr / expr "=>" "_"
 AsmOperandExpr = in_expr:Expr ('=>' out_expr:Expr)?
diff --git a/src/tools/rust-analyzer/crates/syntax/src/ast/edit_in_place.rs b/src/tools/rust-analyzer/crates/syntax/src/ast/edit_in_place.rs
index e60243f2c91..e902516471d 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/ast/edit_in_place.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/ast/edit_in_place.rs
@@ -406,42 +406,6 @@ impl ast::WhereClause {
     }
 }
 
-impl ast::TypeParam {
-    pub fn remove_default(&self) {
-        if let Some((eq, last)) = self
-            .syntax()
-            .children_with_tokens()
-            .find(|it| it.kind() == T![=])
-            .zip(self.syntax().last_child_or_token())
-        {
-            ted::remove_all(eq..=last);
-
-            // remove any trailing ws
-            if let Some(last) = self.syntax().last_token().filter(|it| it.kind() == WHITESPACE) {
-                last.detach();
-            }
-        }
-    }
-}
-
-impl ast::ConstParam {
-    pub fn remove_default(&self) {
-        if let Some((eq, last)) = self
-            .syntax()
-            .children_with_tokens()
-            .find(|it| it.kind() == T![=])
-            .zip(self.syntax().last_child_or_token())
-        {
-            ted::remove_all(eq..=last);
-
-            // remove any trailing ws
-            if let Some(last) = self.syntax().last_token().filter(|it| it.kind() == WHITESPACE) {
-                last.detach();
-            }
-        }
-    }
-}
-
 pub trait Removable: AstNode {
     fn remove(&self);
 }
diff --git a/src/tools/rust-analyzer/crates/syntax/src/ast/generated/nodes.rs b/src/tools/rust-analyzer/crates/syntax/src/ast/generated/nodes.rs
index 79a9f4da338..2b862465420 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/ast/generated/nodes.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/ast/generated/nodes.rs
@@ -118,6 +118,14 @@ impl AsmExpr {
     pub fn asm_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![asm]) }
     #[inline]
     pub fn builtin_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![builtin]) }
+    #[inline]
+    pub fn global_asm_token(&self) -> Option<SyntaxToken> {
+        support::token(&self.syntax, T![global_asm])
+    }
+    #[inline]
+    pub fn naked_asm_token(&self) -> Option<SyntaxToken> {
+        support::token(&self.syntax, T![naked_asm])
+    }
 }
 pub struct AsmLabel {
     pub(crate) syntax: SyntaxNode,
@@ -2087,6 +2095,7 @@ impl ast::HasAttrs for GenericParam {}
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub enum Item {
+    AsmExpr(AsmExpr),
     Const(Const),
     Enum(Enum),
     ExternBlock(ExternBlock),
@@ -2106,7 +2115,6 @@ pub enum Item {
     Use(Use),
 }
 impl ast::HasAttrs for Item {}
-impl ast::HasDocComments for Item {}
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub enum Pat {
@@ -8409,6 +8417,10 @@ impl AstNode for GenericParam {
         }
     }
 }
+impl From<AsmExpr> for Item {
+    #[inline]
+    fn from(node: AsmExpr) -> Item { Item::AsmExpr(node) }
+}
 impl From<Const> for Item {
     #[inline]
     fn from(node: Const) -> Item { Item::Const(node) }
@@ -8482,7 +8494,8 @@ impl AstNode for Item {
     fn can_cast(kind: SyntaxKind) -> bool {
         matches!(
             kind,
-            CONST
+            ASM_EXPR
+                | CONST
                 | ENUM
                 | EXTERN_BLOCK
                 | EXTERN_CRATE
@@ -8504,6 +8517,7 @@ impl AstNode for Item {
     #[inline]
     fn cast(syntax: SyntaxNode) -> Option<Self> {
         let res = match syntax.kind() {
+            ASM_EXPR => Item::AsmExpr(AsmExpr { syntax }),
             CONST => Item::Const(Const { syntax }),
             ENUM => Item::Enum(Enum { syntax }),
             EXTERN_BLOCK => Item::ExternBlock(ExternBlock { syntax }),
@@ -8528,6 +8542,7 @@ impl AstNode for Item {
     #[inline]
     fn syntax(&self) -> &SyntaxNode {
         match self {
+            Item::AsmExpr(it) => &it.syntax,
             Item::Const(it) => &it.syntax,
             Item::Enum(it) => &it.syntax,
             Item::ExternBlock(it) => &it.syntax,
diff --git a/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs b/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs
index 309332873cb..d67f24fda96 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/ast/make.rs
@@ -680,7 +680,7 @@ pub fn expr_tuple(elements: impl IntoIterator<Item = ast::Expr>) -> ast::TupleEx
     let expr = elements.into_iter().format(", ");
     expr_from_text(&format!("({expr})"))
 }
-pub fn expr_assignment(lhs: ast::Expr, rhs: ast::Expr) -> ast::Expr {
+pub fn expr_assignment(lhs: ast::Expr, rhs: ast::Expr) -> ast::BinExpr {
     expr_from_text(&format!("{lhs} = {rhs}"))
 }
 fn expr_from_text<E: Into<ast::Expr> + AstNode>(text: &str) -> E {
diff --git a/src/tools/rust-analyzer/crates/syntax/src/ast/syntax_factory/constructors.rs b/src/tools/rust-analyzer/crates/syntax/src/ast/syntax_factory/constructors.rs
index 17cc5f9c057..1ba61073151 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/ast/syntax_factory/constructors.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/ast/syntax_factory/constructors.rs
@@ -440,6 +440,19 @@ impl SyntaxFactory {
         ast
     }
 
+    pub fn expr_assignment(&self, lhs: ast::Expr, rhs: ast::Expr) -> ast::BinExpr {
+        let ast = make::expr_assignment(lhs.clone(), rhs.clone()).clone_for_update();
+
+        if let Some(mut mapping) = self.mappings() {
+            let mut builder = SyntaxMappingBuilder::new(ast.syntax().clone());
+            builder.map_node(lhs.syntax().clone(), ast.lhs().unwrap().syntax().clone());
+            builder.map_node(rhs.syntax().clone(), ast.rhs().unwrap().syntax().clone());
+            builder.finish(&mut mapping);
+        }
+
+        ast
+    }
+
     pub fn expr_bin(&self, lhs: ast::Expr, op: ast::BinaryOp, rhs: ast::Expr) -> ast::BinExpr {
         let ast::Expr::BinExpr(ast) =
             make::expr_bin_op(lhs.clone(), op, rhs.clone()).clone_for_update()
diff --git a/src/tools/rust-analyzer/crates/test-utils/src/minicore.rs b/src/tools/rust-analyzer/crates/test-utils/src/minicore.rs
index dc1eba1a1ab..7b719b5dec7 100644
--- a/src/tools/rust-analyzer/crates/test-utils/src/minicore.rs
+++ b/src/tools/rust-analyzer/crates/test-utils/src/minicore.rs
@@ -1011,8 +1011,7 @@ pub mod ops {
     }
 
     #[lang = "add_assign"]
-    #[const_trait]
-    pub trait AddAssign<Rhs = Self> {
+    pub const trait AddAssign<Rhs = Self> {
         fn add_assign(&mut self, rhs: Rhs);
     }
 
@@ -1941,6 +1940,7 @@ pub mod prelude {
             clone::Clone,                            // :clone
             cmp::{Eq, PartialEq},                    // :eq
             cmp::{Ord, PartialOrd},                  // :ord
+            convert::AsMut,                          // :as_mut
             convert::AsRef,                          // :as_ref
             convert::{From, Into, TryFrom, TryInto}, // :from
             default::Default,                        // :default
diff --git a/src/tools/rust-analyzer/crates/tt/src/iter.rs b/src/tools/rust-analyzer/crates/tt/src/iter.rs
index 3246156f1cb..2e89d762a0e 100644
--- a/src/tools/rust-analyzer/crates/tt/src/iter.rs
+++ b/src/tools/rust-analyzer/crates/tt/src/iter.rs
@@ -217,6 +217,17 @@ pub enum TtElement<'a, S> {
     Subtree(&'a Subtree<S>, TtIter<'a, S>),
 }
 
+impl<S: Copy + fmt::Debug> fmt::Debug for TtElement<'_, S> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Leaf(leaf) => f.debug_tuple("Leaf").field(leaf).finish(),
+            Self::Subtree(subtree, inner) => {
+                f.debug_tuple("Subtree").field(subtree).field(inner).finish()
+            }
+        }
+    }
+}
+
 impl<S: Copy> TtElement<'_, S> {
     #[inline]
     pub fn first_span(&self) -> S {
diff --git a/src/tools/rust-analyzer/crates/tt/src/lib.rs b/src/tools/rust-analyzer/crates/tt/src/lib.rs
index 14574a6456b..44123385c8c 100644
--- a/src/tools/rust-analyzer/crates/tt/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/tt/src/lib.rs
@@ -579,7 +579,7 @@ where
 {
     use rustc_lexer::LiteralKind;
 
-    let token = rustc_lexer::tokenize(text).next_tuple();
+    let token = rustc_lexer::tokenize(text, rustc_lexer::FrontmatterAllowed::No).next_tuple();
     let Some((rustc_lexer::Token {
         kind: rustc_lexer::TokenKind::Literal { kind, suffix_start },
         ..
diff --git a/src/tools/rust-analyzer/lib/lsp-server/Cargo.toml b/src/tools/rust-analyzer/lib/lsp-server/Cargo.toml
index 35a5a4d82b2..1fc1da50a0a 100644
--- a/src/tools/rust-analyzer/lib/lsp-server/Cargo.toml
+++ b/src/tools/rust-analyzer/lib/lsp-server/Cargo.toml
@@ -16,6 +16,9 @@ crossbeam-channel.workspace = true
 [dev-dependencies]
 lsp-types = "=0.95"
 ctrlc = "3.4.7"
+anyhow.workspace     = true
+rustc-hash.workspace = true
+toolchain.workspace  = true
 
 [lints]
 workspace = true
diff --git a/src/tools/rust-analyzer/lib/lsp-server/examples/goto_def.rs b/src/tools/rust-analyzer/lib/lsp-server/examples/goto_def.rs
deleted file mode 100644
index 6b3acda7bcd..00000000000
--- a/src/tools/rust-analyzer/lib/lsp-server/examples/goto_def.rs
+++ /dev/null
@@ -1,132 +0,0 @@
-//! A minimal example LSP server that can only respond to the `gotoDefinition` request. To use
-//! this example, execute it and then send an `initialize` request.
-//!
-//! ```no_run
-//! Content-Length: 85
-//!
-//! {"jsonrpc": "2.0", "method": "initialize", "id": 1, "params": {"capabilities": {}}}
-//! ```
-//!
-//! This will respond with a server response. Then send it a `initialized` notification which will
-//! have no response.
-//!
-//! ```no_run
-//! Content-Length: 59
-//!
-//! {"jsonrpc": "2.0", "method": "initialized", "params": {}}
-//! ```
-//!
-//! Once these two are sent, then we enter the main loop of the server. The only request this
-//! example can handle is `gotoDefinition`:
-//!
-//! ```no_run
-//! Content-Length: 159
-//!
-//! {"jsonrpc": "2.0", "method": "textDocument/definition", "id": 2, "params": {"textDocument": {"uri": "file://temp"}, "position": {"line": 1, "character": 1}}}
-//! ```
-//!
-//! To finish up without errors, send a shutdown request:
-//!
-//! ```no_run
-//! Content-Length: 67
-//!
-//! {"jsonrpc": "2.0", "method": "shutdown", "id": 3, "params": null}
-//! ```
-//!
-//! The server will exit the main loop and finally we send a `shutdown` notification to stop
-//! the server.
-//!
-//! ```
-//! Content-Length: 54
-//!
-//! {"jsonrpc": "2.0", "method": "exit", "params": null}
-//! ```
-
-#![allow(clippy::print_stderr)]
-
-use std::error::Error;
-
-use lsp_types::OneOf;
-use lsp_types::{
-    GotoDefinitionResponse, InitializeParams, ServerCapabilities, request::GotoDefinition,
-};
-
-use lsp_server::{Connection, ExtractError, Message, Request, RequestId, Response};
-
-fn main() -> Result<(), Box<dyn Error + Sync + Send>> {
-    // Note that  we must have our logging only write out to stderr.
-    eprintln!("starting generic LSP server");
-
-    // Create the transport. Includes the stdio (stdin and stdout) versions but this could
-    // also be implemented to use sockets or HTTP.
-    let (connection, io_threads) = Connection::stdio();
-
-    // Run the server and wait for the two threads to end (typically by trigger LSP Exit event).
-    let server_capabilities = serde_json::to_value(&ServerCapabilities {
-        definition_provider: Some(OneOf::Left(true)),
-        ..Default::default()
-    })
-    .unwrap();
-    let initialization_params = match connection.initialize(server_capabilities) {
-        Ok(it) => it,
-        Err(e) => {
-            if e.channel_is_disconnected() {
-                io_threads.join()?;
-            }
-            return Err(e.into());
-        }
-    };
-    main_loop(connection, initialization_params)?;
-    io_threads.join()?;
-
-    // Shut down gracefully.
-    eprintln!("shutting down server");
-    Ok(())
-}
-
-fn main_loop(
-    connection: Connection,
-    params: serde_json::Value,
-) -> Result<(), Box<dyn Error + Sync + Send>> {
-    let _params: InitializeParams = serde_json::from_value(params).unwrap();
-    eprintln!("starting example main loop");
-    for msg in &connection.receiver {
-        eprintln!("got msg: {msg:?}");
-        match msg {
-            Message::Request(req) => {
-                if connection.handle_shutdown(&req)? {
-                    return Ok(());
-                }
-                eprintln!("got request: {req:?}");
-                match cast::<GotoDefinition>(req) {
-                    Ok((id, params)) => {
-                        eprintln!("got gotoDefinition request #{id}: {params:?}");
-                        let result = Some(GotoDefinitionResponse::Array(Vec::new()));
-                        let result = serde_json::to_value(&result).unwrap();
-                        let resp = Response { id, result: Some(result), error: None };
-                        connection.sender.send(Message::Response(resp))?;
-                        continue;
-                    }
-                    Err(err @ ExtractError::JsonError { .. }) => panic!("{err:?}"),
-                    Err(ExtractError::MethodMismatch(req)) => req,
-                };
-                // ...
-            }
-            Message::Response(resp) => {
-                eprintln!("got response: {resp:?}");
-            }
-            Message::Notification(not) => {
-                eprintln!("got notification: {not:?}");
-            }
-        }
-    }
-    Ok(())
-}
-
-fn cast<R>(req: Request) -> Result<(RequestId, R::Params), ExtractError<Request>>
-where
-    R: lsp_types::request::Request,
-    R::Params: serde::de::DeserializeOwned,
-{
-    req.extract(R::METHOD)
-}
diff --git a/src/tools/rust-analyzer/lib/lsp-server/examples/manual_test.sh b/src/tools/rust-analyzer/lib/lsp-server/examples/manual_test.sh
new file mode 100755
index 00000000000..d028ac43301
--- /dev/null
+++ b/src/tools/rust-analyzer/lib/lsp-server/examples/manual_test.sh
@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+# Simple nine-packet LSP test for examples/minimal_lsp.rs
+# Usage (two tabs):
+#
+#   mkfifo /tmp/lsp_pipe          # one-time setup
+#   # tab 1 – run the server
+#   cat /tmp/lsp_pipe | cargo run --example minimal_lsp
+#
+#   # tab 2 – fire the packets (this script)
+#   bash examples/manual_test.sh          # blocks until server exits
+#
+# If you don’t use a second tab, run the script in the background:
+#
+#   bash examples/manual_test.sh &        # writer in background
+#   cat /tmp/lsp_pipe | cargo run --example minimal_lsp
+#
+# The script opens /tmp/lsp_pipe for writing (exec 3>) and sends each JSON
+# packet with a correct Content-Length header.
+#
+# One-liner alternative (single terminal, no FIFO):
+#
+#   cargo run --example minimal_lsp <<'EOF'
+#     … nine packets …
+#   EOF
+#
+# Both approaches feed identical bytes to minimal_lsp via stdin.
+
+set -eu
+PIPE=${1:-/tmp/lsp_pipe}
+
+mkfifo -m 600 "$PIPE" 2>/dev/null || true       # create once, ignore if exists
+
+# open write end so the fifo stays open
+exec 3> "$PIPE"
+
+send() {
+  local body=$1
+  local len=$(printf '%s' "$body" | wc -c)
+  printf 'Content-Length: %d\r\n\r\n%s' "$len" "$body" >&3
+}
+
+send '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"capabilities":{}}}'
+send '{"jsonrpc":"2.0","method":"initialized","params":{}}'
+send '{"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"file:///tmp/foo.rs","languageId":"rust","version":1,"text":"fn  main( ){println!(\"hi\") }"}}}'
+send '{"jsonrpc":"2.0","id":2,"method":"textDocument/completion","params":{"textDocument":{"uri":"file:///tmp/foo.rs"},"position":{"line":0,"character":0}}}'
+send '{"jsonrpc":"2.0","id":3,"method":"textDocument/hover","params":{"textDocument":{"uri":"file:///tmp/foo.rs"},"position":{"line":0,"character":0}}}'
+send '{"jsonrpc":"2.0","id":4,"method":"textDocument/definition","params":{"textDocument":{"uri":"file:///tmp/foo.rs"},"position":{"line":0,"character":0}}}'
+send '{"jsonrpc":"2.0","id":5,"method":"textDocument/formatting","params":{"textDocument":{"uri":"file:///tmp/foo.rs"},"options":{"tabSize":4,"insertSpaces":true}}}'
+send '{"jsonrpc":"2.0","id":6,"method":"shutdown","params":null}'
+send '{"jsonrpc":"2.0","method":"exit","params":null}'
+
+exec 3>&-
+echo "Packets sent – watch the other terminal for responses."
diff --git a/src/tools/rust-analyzer/lib/lsp-server/examples/minimal_lsp.rs b/src/tools/rust-analyzer/lib/lsp-server/examples/minimal_lsp.rs
new file mode 100644
index 00000000000..5eef999e062
--- /dev/null
+++ b/src/tools/rust-analyzer/lib/lsp-server/examples/minimal_lsp.rs
@@ -0,0 +1,335 @@
+//! Minimal Language‑Server‑Protocol example: **`minimal_lsp.rs`**
+//! =============================================================
+//!
+//! | ↔ / ← | LSP method | What the implementation does |
+//! |-------|------------|------------------------------|
+//! | ↔ | `initialize` / `initialized` | capability handshake |
+//! | ← | `textDocument/publishDiagnostics` | pushes a dummy info diagnostic whenever the buffer changes |
+//! | ← | `textDocument/definition` | echoes an empty location array so the jump works |
+//! | ← | `textDocument/completion` | offers one hard‑coded item `HelloFromLSP` |
+//! | ← | `textDocument/hover` | shows *Hello from minimal_lsp* markdown |
+//! | ← | `textDocument/formatting` | pipes the doc through **rustfmt** and returns a full‑file edit |
+//!
+//! ### Quick start
+//! ```bash
+//! cd rust-analyzer/lib/lsp-server
+//! cargo run --example minimal_lsp
+//! ```
+//!
+//! ### Minimal manual session (all nine packets)
+//! ```no_run
+//! # 1. initialize - server replies with capabilities
+//! Content-Length: 85
+
+//! {"jsonrpc":"2.0","id":1,"method":"initialize","params":{"capabilities":{}}}
+//!
+//! # 2. initialized - no response expected
+//! Content-Length: 59
+
+//! {"jsonrpc":"2.0","method":"initialized","params":{}}
+//!
+//! # 3. didOpen - provide initial buffer text
+//! Content-Length: 173
+
+//! {"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"file:///tmp/foo.rs","languageId":"rust","version":1,"text":"fn  main( ){println!(\"hi\") }"}}}
+//!
+//! # 4. completion - expect HelloFromLSP
+//! Content-Length: 139
+
+//! {"jsonrpc":"2.0","id":2,"method":"textDocument/completion","params":{"textDocument":{"uri":"file:///tmp/foo.rs"},"position":{"line":0,"character":0}}}
+//!
+//! # 5. hover - expect markdown greeting
+//! Content-Length: 135
+
+//! {"jsonrpc":"2.0","id":3,"method":"textDocument/hover","params":{"textDocument":{"uri":"file:///tmp/foo.rs"},"position":{"line":0,"character":0}}}
+//!
+//! # 6. goto-definition - dummy empty array
+//! Content-Length: 139
+
+//! {"jsonrpc":"2.0","id":4,"method":"textDocument/definition","params":{"textDocument":{"uri":"file:///tmp/foo.rs"},"position":{"line":0,"character":0}}}
+//!
+//! # 7. formatting - rustfmt full document
+//! Content-Length: 157
+
+//! {"jsonrpc":"2.0","id":5,"method":"textDocument/formatting","params":{"textDocument":{"uri":"file:///tmp/foo.rs"},"options":{"tabSize":4,"insertSpaces":true}}}
+//!
+//! # 8. shutdown request - server acks and prepares to exit
+//! Content-Length: 67
+
+//! {"jsonrpc":"2.0","id":6,"method":"shutdown","params":null}
+//!
+//! # 9. exit notification - terminates the server
+//! Content-Length: 54
+
+//! {"jsonrpc":"2.0","method":"exit","params":null}
+//! ```
+//!
+
+use std::{error::Error, io::Write};
+
+use rustc_hash::FxHashMap; // fast hash map
+use std::process::Stdio;
+use toolchain::command; // clippy-approved wrapper
+
+#[allow(clippy::print_stderr, clippy::disallowed_types, clippy::disallowed_methods)]
+use anyhow::{Context, Result, anyhow, bail};
+use lsp_server::{Connection, Message, Request as ServerRequest, RequestId, Response};
+use lsp_types::notification::Notification as _; // for METHOD consts
+use lsp_types::request::Request as _;
+use lsp_types::{
+    CompletionItem,
+    CompletionItemKind,
+    // capability helpers
+    CompletionOptions,
+    CompletionResponse,
+    Diagnostic,
+    DiagnosticSeverity,
+    DidChangeTextDocumentParams,
+    DidOpenTextDocumentParams,
+    DocumentFormattingParams,
+    Hover,
+    HoverContents,
+    HoverProviderCapability,
+    // core
+    InitializeParams,
+    MarkedString,
+    OneOf,
+    Position,
+    PublishDiagnosticsParams,
+    Range,
+    ServerCapabilities,
+    TextDocumentSyncCapability,
+    TextDocumentSyncKind,
+    TextEdit,
+    Url,
+    // notifications
+    notification::{DidChangeTextDocument, DidOpenTextDocument, PublishDiagnostics},
+    // requests
+    request::{Completion, Formatting, GotoDefinition, HoverRequest},
+}; // for METHOD consts
+
+// =====================================================================
+// main
+// =====================================================================
+
+#[allow(clippy::print_stderr)]
+fn main() -> std::result::Result<(), Box<dyn Error + Sync + Send>> {
+    log::error!("starting minimal_lsp");
+
+    // transport
+    let (connection, io_thread) = Connection::stdio();
+
+    // advertised capabilities
+    let caps = ServerCapabilities {
+        text_document_sync: Some(TextDocumentSyncCapability::Kind(TextDocumentSyncKind::FULL)),
+        completion_provider: Some(CompletionOptions::default()),
+        definition_provider: Some(OneOf::Left(true)),
+        hover_provider: Some(HoverProviderCapability::Simple(true)),
+        document_formatting_provider: Some(OneOf::Left(true)),
+        ..Default::default()
+    };
+    let init_value = serde_json::json!({
+        "capabilities": caps,
+        "offsetEncoding": ["utf-8"],
+    });
+
+    let init_params = connection.initialize(init_value)?;
+    main_loop(connection, init_params)?;
+    io_thread.join()?;
+    log::error!("shutting down server");
+    Ok(())
+}
+
+// =====================================================================
+// event loop
+// =====================================================================
+
+fn main_loop(
+    connection: Connection,
+    params: serde_json::Value,
+) -> std::result::Result<(), Box<dyn Error + Sync + Send>> {
+    let _init: InitializeParams = serde_json::from_value(params)?;
+    let mut docs: FxHashMap<Url, String> = FxHashMap::default();
+
+    for msg in &connection.receiver {
+        match msg {
+            Message::Request(req) => {
+                if connection.handle_shutdown(&req)? {
+                    break;
+                }
+                if let Err(err) = handle_request(&connection, &req, &mut docs) {
+                    log::error!("[lsp] request {} failed: {err}", &req.method);
+                }
+            }
+            Message::Notification(note) => {
+                if let Err(err) = handle_notification(&connection, &note, &mut docs) {
+                    log::error!("[lsp] notification {} failed: {err}", note.method);
+                }
+            }
+            Message::Response(resp) => log::error!("[lsp] response: {resp:?}"),
+        }
+    }
+    Ok(())
+}
+
+// =====================================================================
+// notifications
+// =====================================================================
+
+fn handle_notification(
+    conn: &Connection,
+    note: &lsp_server::Notification,
+    docs: &mut FxHashMap<Url, String>,
+) -> Result<()> {
+    match note.method.as_str() {
+        DidOpenTextDocument::METHOD => {
+            let p: DidOpenTextDocumentParams = serde_json::from_value(note.params.clone())?;
+            let uri = p.text_document.uri;
+            docs.insert(uri.clone(), p.text_document.text);
+            publish_dummy_diag(conn, &uri)?;
+        }
+        DidChangeTextDocument::METHOD => {
+            let p: DidChangeTextDocumentParams = serde_json::from_value(note.params.clone())?;
+            if let Some(change) = p.content_changes.into_iter().next() {
+                let uri = p.text_document.uri;
+                docs.insert(uri.clone(), change.text);
+                publish_dummy_diag(conn, &uri)?;
+            }
+        }
+        _ => {}
+    }
+    Ok(())
+}
+
+// =====================================================================
+// requests
+// =====================================================================
+
+fn handle_request(
+    conn: &Connection,
+    req: &ServerRequest,
+    docs: &mut FxHashMap<Url, String>,
+) -> Result<()> {
+    match req.method.as_str() {
+        GotoDefinition::METHOD => {
+            send_ok(conn, req.id.clone(), &lsp_types::GotoDefinitionResponse::Array(Vec::new()))?;
+        }
+        Completion::METHOD => {
+            let item = CompletionItem {
+                label: "HelloFromLSP".into(),
+                kind: Some(CompletionItemKind::FUNCTION),
+                detail: Some("dummy completion".into()),
+                ..Default::default()
+            };
+            send_ok(conn, req.id.clone(), &CompletionResponse::Array(vec![item]))?;
+        }
+        HoverRequest::METHOD => {
+            let hover = Hover {
+                contents: HoverContents::Scalar(MarkedString::String(
+                    "Hello from *minimal_lsp*".into(),
+                )),
+                range: None,
+            };
+            send_ok(conn, req.id.clone(), &hover)?;
+        }
+        Formatting::METHOD => {
+            let p: DocumentFormattingParams = serde_json::from_value(req.params.clone())?;
+            let uri = p.text_document.uri;
+            let text = docs
+                .get(&uri)
+                .ok_or_else(|| anyhow!("document not in cache – did you send DidOpen?"))?;
+            let formatted = run_rustfmt(text)?;
+            let edit = TextEdit { range: full_range(text), new_text: formatted };
+            send_ok(conn, req.id.clone(), &vec![edit])?;
+        }
+        _ => send_err(
+            conn,
+            req.id.clone(),
+            lsp_server::ErrorCode::MethodNotFound,
+            "unhandled method",
+        )?,
+    }
+    Ok(())
+}
+
+// =====================================================================
+// diagnostics
+// =====================================================================
+fn publish_dummy_diag(conn: &Connection, uri: &Url) -> Result<()> {
+    let diag = Diagnostic {
+        range: Range::new(Position::new(0, 0), Position::new(0, 1)),
+        severity: Some(DiagnosticSeverity::INFORMATION),
+        code: None,
+        code_description: None,
+        source: Some("minimal_lsp".into()),
+        message: "dummy diagnostic".into(),
+        related_information: None,
+        tags: None,
+        data: None,
+    };
+    let params =
+        PublishDiagnosticsParams { uri: uri.clone(), diagnostics: vec![diag], version: None };
+    conn.sender.send(Message::Notification(lsp_server::Notification::new(
+        PublishDiagnostics::METHOD.to_owned(),
+        params,
+    )))?;
+    Ok(())
+}
+
+// =====================================================================
+// helpers
+// =====================================================================
+
+fn run_rustfmt(input: &str) -> Result<String> {
+    let cwd = std::env::current_dir().expect("can't determine CWD");
+    let mut child = command("rustfmt", &cwd, &FxHashMap::default())
+        .arg("--emit")
+        .arg("stdout")
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .spawn()
+        .context("failed to spawn rustfmt – is it installed?")?;
+
+    let Some(stdin) = child.stdin.as_mut() else {
+        bail!("stdin unavailable");
+    };
+    stdin.write_all(input.as_bytes())?;
+    let output = child.wait_with_output()?;
+    if !output.status.success() {
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        bail!("rustfmt failed: {stderr}");
+    }
+    Ok(String::from_utf8(output.stdout)?)
+}
+
+fn full_range(text: &str) -> Range {
+    let last_line_idx = text.lines().count().saturating_sub(1) as u32;
+    let last_col = text.lines().last().map_or(0, |l| l.chars().count()) as u32;
+    Range::new(Position::new(0, 0), Position::new(last_line_idx, last_col))
+}
+
+fn send_ok<T: serde::Serialize>(conn: &Connection, id: RequestId, result: &T) -> Result<()> {
+    let resp = Response { id, result: Some(serde_json::to_value(result)?), error: None };
+    conn.sender.send(Message::Response(resp))?;
+    Ok(())
+}
+
+fn send_err(
+    conn: &Connection,
+    id: RequestId,
+    code: lsp_server::ErrorCode,
+    msg: &str,
+) -> Result<()> {
+    let resp = Response {
+        id,
+        result: None,
+        error: Some(lsp_server::ResponseError {
+            code: code as i32,
+            message: msg.into(),
+            data: None,
+        }),
+    };
+    conn.sender.send(Message::Response(resp))?;
+    Ok(())
+}
diff --git a/src/tools/rust-analyzer/rust-version b/src/tools/rust-analyzer/rust-version
index 902793225ea..c2b1c151b83 100644
--- a/src/tools/rust-analyzer/rust-version
+++ b/src/tools/rust-analyzer/rust-version
@@ -1 +1 @@
-ad3b7257615c28aaf8212a189ec032b8af75de51
+e05ab47e6c418fb2b9faa2eae9a7e70c65c98eaa
diff --git a/src/tools/rust-analyzer/xtask/src/codegen/grammar/ast_src.rs b/src/tools/rust-analyzer/xtask/src/codegen/grammar/ast_src.rs
index d8cbf894520..b9f570fe0e3 100644
--- a/src/tools/rust-analyzer/xtask/src/codegen/grammar/ast_src.rs
+++ b/src/tools/rust-analyzer/xtask/src/codegen/grammar/ast_src.rs
@@ -116,6 +116,8 @@ const CONTEXTUAL_KEYWORDS: &[&str] =
 // keywords we use for special macro expansions
 const CONTEXTUAL_BUILTIN_KEYWORDS: &[&str] = &[
     "asm",
+    "naked_asm",
+    "global_asm",
     "att_syntax",
     "builtin",
     "clobber_abi",
diff --git a/src/tools/rustbook/Cargo.lock b/src/tools/rustbook/Cargo.lock
index 050ddf47bae..e363668d462 100644
--- a/src/tools/rustbook/Cargo.lock
+++ b/src/tools/rustbook/Cargo.lock
@@ -19,9 +19,9 @@ dependencies = [
 
 [[package]]
 name = "ammonia"
-version = "4.1.0"
+version = "4.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3ada2ee439075a3e70b6992fce18ac4e407cd05aea9ca3f75d2c0b0c20bbb364"
+checksum = "d6b346764dd0814805de8abf899fe03065bcee69bb1a4771c785817e39f3978f"
 dependencies = [
  "cssparser",
  "html5ever",
@@ -156,9 +156,9 @@ checksum = "46c5e41b57b8bba42a04676d81cb89e9ee8e859a1a66f80a5a72e1cb76b34d43"
 
 [[package]]
 name = "cc"
-version = "1.2.29"
+version = "1.2.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c1599538de2394445747c8cf7935946e3cc27e9625f889d979bfb2aaf569362"
+checksum = "deec109607ca693028562ed836a5f1c4b8bd77755c4e132fc5ce11b0b6211ae7"
 dependencies = [
  "shlex",
 ]
@@ -185,9 +185,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.40"
+version = "4.5.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "40b6887a1d8685cebccf115538db5c0efe625ccac9696ad45c409d96566e910f"
+checksum = "be92d32e80243a54711e5d7ce823c35c41c9d929dc4ab58e1276f625841aadf9"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -195,9 +195,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.40"
+version = "4.5.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e0c66c08ce9f0c698cbce5c0279d0bb6ac936d8674174fe48f736533b964f59e"
+checksum = "707eab41e9622f9139419d573eca0900137718000c517d47da73045f54331c3d"
 dependencies = [
  "anstream",
  "anstyle",
@@ -208,18 +208,18 @@ dependencies = [
 
 [[package]]
 name = "clap_complete"
-version = "4.5.54"
+version = "4.5.55"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aad5b1b4de04fead402672b48897030eec1f3bfe1550776322f59f6d6e6a5677"
+checksum = "a5abde44486daf70c5be8b8f8f1b66c49f86236edf6fa2abadb4d961c4c6229a"
 dependencies = [
  "clap",
 ]
 
 [[package]]
 name = "clap_derive"
-version = "4.5.40"
+version = "4.5.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2c7947ae4cc3d851207c1adb5b5e260ff0cca11446b1d6d1423788e442257ce"
+checksum = "ef4f52386a59ca4c860f7393bcf8abd8dfd91ecccc0f774635ff68e92eeef491"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -256,9 +256,9 @@ dependencies = [
 
 [[package]]
 name = "crc32fast"
-version = "1.4.2"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a97769d94ddab943e4510d138150169a2758b5ef3eb191a9ee688de3e23ef7b3"
+checksum = "9481c1c90cbf2ac953f07c8d4a58aa3945c425b7185c9154d67a65e4230da511"
 dependencies = [
  "cfg-if",
 ]
@@ -582,12 +582,11 @@ checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "html5ever"
-version = "0.31.0"
+version = "0.35.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "953cbbe631aae7fc0a112702ad5d3aaf09da38beaf45ea84610d6e1c358f569c"
+checksum = "55d958c2f74b664487a2035fe1dadb032c48718a03b63f3ab0b8537db8549ed4"
 dependencies = [
  "log",
- "mac",
  "markup5ever",
  "match_token",
 ]
@@ -863,9 +862,9 @@ checksum = "3e2e65a1a2e43cfcb47a895c4c8b10d1f4a61097f9f254f183aee60cad9c651d"
 
 [[package]]
 name = "markup5ever"
-version = "0.16.2"
+version = "0.35.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e4cd8c02f18a011991a039855480c64d74291c5792fcc160d55d77dc4de4a39"
+checksum = "311fe69c934650f8f19652b3946075f0fc41ad8757dbb68f1ca14e7900ecc1c3"
 dependencies = [
  "log",
  "tendril",
@@ -874,9 +873,9 @@ dependencies = [
 
 [[package]]
 name = "match_token"
-version = "0.1.0"
+version = "0.35.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88a9689d8d44bf9964484516275f5cd4c9b59457a6940c1d5d0ecbb94510a36b"
+checksum = "ac84fd3f360fcc43dc5f5d186f02a94192761a080e8bc58621ad4d12296a58cf"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -885,9 +884,9 @@ dependencies = [
 
 [[package]]
 name = "mdbook"
-version = "0.4.51"
+version = "0.4.52"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a87e65420ab45ca9c1b8cdf698f95b710cc826d373fa550f0f7fad82beac9328"
+checksum = "93c284d2855916af7c5919cf9ad897cfc77d3c2db6f55429c7cfb769182030ec"
 dependencies = [
  "ammonia",
  "anyhow",
@@ -1394,15 +1393,15 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "1.0.7"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c71e83d6afe7ff64890ec6b71d6a69bb8a610ab78ce364b3352876bb4c801266"
+checksum = "11181fbabf243db407ef8df94a6ce0b2f9a733bd8be4ad02b4eda9602296cac8"
 dependencies = [
  "bitflags 2.9.1",
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -1460,9 +1459,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.140"
+version = "1.0.141"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
+checksum = "30b9eff21ebe718216c6ec64e1d9ac57087aad11efc64e32002bce4a0d4c03d3"
 dependencies = [
  "itoa",
  "memchr",
@@ -2103,9 +2102,9 @@ checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
 
 [[package]]
 name = "winnow"
-version = "0.7.11"
+version = "0.7.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74c7b26e3480b707944fc872477815d29a8e429d2f93a1ce000f5fa84a15cbcd"
+checksum = "f3edebf492c8125044983378ecb5766203ad3b4c2f7a922bd7dd207f6d443e95"
 dependencies = [
  "memchr",
 ]
diff --git a/src/tools/rustbook/Cargo.toml b/src/tools/rustbook/Cargo.toml
index 69c0cfaf5c9..c7c6e39f157 100644
--- a/src/tools/rustbook/Cargo.toml
+++ b/src/tools/rustbook/Cargo.toml
@@ -15,6 +15,6 @@ mdbook-i18n-helpers = "0.3.3"
 mdbook-spec = { path = "../../doc/reference/mdbook-spec" }
 
 [dependencies.mdbook]
-version = "0.4.51"
+version = "0.4.52"
 default-features = false
 features = ["search"]
diff --git a/src/tools/rustdoc-gui-test/src/main.rs b/src/tools/rustdoc-gui-test/src/main.rs
index 6461f38f527..42feae8c208 100644
--- a/src/tools/rustdoc-gui-test/src/main.rs
+++ b/src/tools/rustdoc-gui-test/src/main.rs
@@ -1,63 +1,15 @@
+use std::env;
 use std::path::{Path, PathBuf};
 use std::process::Command;
 use std::sync::Arc;
-use std::{env, fs};
 
+use build_helper::npm;
 use build_helper::util::try_run;
 use compiletest::directives::TestProps;
 use config::Config;
 
 mod config;
 
-fn get_browser_ui_test_version_inner(npm: &Path, global: bool) -> Option<String> {
-    let mut command = Command::new(&npm);
-    command.arg("list").arg("--parseable").arg("--long").arg("--depth=0");
-    if global {
-        command.arg("--global");
-    }
-    let lines = match command.output() {
-        Ok(output) => String::from_utf8_lossy(&output.stdout).into_owned(),
-        Err(e) => {
-            eprintln!(
-                "path to npm can be wrong, provided path: {npm:?}. Try to set npm path \
-            in bootstrap.toml in [build.npm]",
-            );
-            panic!("{:?}", e)
-        }
-    };
-    lines
-        .lines()
-        .find_map(|l| l.rsplit(':').next()?.strip_prefix("browser-ui-test@"))
-        .map(|v| v.to_owned())
-}
-
-fn get_browser_ui_test_version(npm: &Path) -> Option<String> {
-    get_browser_ui_test_version_inner(npm, false)
-        .or_else(|| get_browser_ui_test_version_inner(npm, true))
-}
-
-fn compare_browser_ui_test_version(installed_version: &str, src: &Path) {
-    match fs::read_to_string(
-        src.join("src/ci/docker/host-x86_64/x86_64-gnu-tools/browser-ui-test.version"),
-    ) {
-        Ok(v) => {
-            if v.trim() != installed_version {
-                eprintln!(
-                    "⚠️ Installed version of browser-ui-test (`{}`) is different than the \
-                     one used in the CI (`{}`)",
-                    installed_version, v
-                );
-                eprintln!(
-                    "You can install this version using `npm update browser-ui-test` or by using \
-                     `npm install browser-ui-test@{}`",
-                    v,
-                );
-            }
-        }
-        Err(e) => eprintln!("Couldn't find the CI browser-ui-test version: {:?}", e),
-    }
-}
-
 fn find_librs<P: AsRef<Path>>(path: P) -> Option<PathBuf> {
     for entry in walkdir::WalkDir::new(path) {
         let entry = entry.ok()?;
@@ -71,27 +23,6 @@ fn find_librs<P: AsRef<Path>>(path: P) -> Option<PathBuf> {
 fn main() -> Result<(), ()> {
     let config = Arc::new(Config::from_args(env::args().collect()));
 
-    // The goal here is to check if the necessary packages are installed, and if not, we
-    // panic.
-    match get_browser_ui_test_version(&config.npm) {
-        Some(version) => {
-            // We also check the version currently used in CI and emit a warning if it's not the
-            // same one.
-            compare_browser_ui_test_version(&version, &config.rust_src);
-        }
-        None => {
-            eprintln!(
-                r#"
-error: rustdoc-gui test suite cannot be run because npm `browser-ui-test` dependency is missing.
-
-If you want to install the `browser-ui-test` dependency, run `npm install browser-ui-test`
-"#,
-            );
-
-            panic!("Cannot run rustdoc-gui tests");
-        }
-    }
-
     let src_path = config.rust_src.join("tests/rustdoc-gui/src");
     for entry in src_path.read_dir().expect("read_dir call failed") {
         if let Ok(entry) = entry {
@@ -112,11 +43,7 @@ If you want to install the `browser-ui-test` dependency, run `npm install browse
                 .current_dir(path);
 
             if let Some(librs) = find_librs(entry.path()) {
-                let compiletest_c = compiletest::common::Config {
-                    edition: None,
-                    mode: compiletest::common::Mode::Rustdoc,
-                    ..Default::default()
-                };
+                let compiletest_c = compiletest::common::Config::incomplete_for_rustdoc_gui_test();
 
                 let test_props = TestProps::from_file(
                     &camino::Utf8PathBuf::try_from(librs).unwrap(),
@@ -138,16 +65,10 @@ If you want to install the `browser-ui-test` dependency, run `npm install browse
         }
     }
 
-    let mut command = Command::new(&config.nodejs);
+    let local_node_modules = npm::install(&config.rust_src, &config.out_dir, &config.npm)
+        .expect("unable to install browser-ui-test");
 
-    if let Ok(current_dir) = env::current_dir() {
-        let local_node_modules = current_dir.join("node_modules");
-        if local_node_modules.exists() {
-            // Link the local node_modules if exists.
-            // This is useful when we run rustdoc-gui-test from outside of the source root.
-            env::set_var("NODE_PATH", local_node_modules);
-        }
-    }
+    let mut command = Command::new(&config.nodejs);
 
     command
         .arg(config.rust_src.join("src/tools/rustdoc-gui/tester.js"))
@@ -158,6 +79,12 @@ If you want to install the `browser-ui-test` dependency, run `npm install browse
         .arg("--tests-folder")
         .arg(config.rust_src.join("tests/rustdoc-gui"));
 
+    if local_node_modules.exists() {
+        // Link the local node_modules if exists.
+        // This is useful when we run rustdoc-gui-test from outside of the source root.
+        command.env("NODE_PATH", local_node_modules);
+    }
+
     for file in &config.goml_files {
         command.arg("--file").arg(file);
     }
diff --git a/src/tools/rustdoc-js/tester.js b/src/tools/rustdoc-js/tester.js
index f70fc917770..0baa179e16b 100644
--- a/src/tools/rustdoc-js/tester.js
+++ b/src/tools/rustdoc-js/tester.js
@@ -28,7 +28,14 @@ function readFile(filePath) {
 }
 
 function contentToDiffLine(key, value) {
-    return `"${key}": "${value}",`;
+    if (typeof value === "object" && !Array.isArray(value) && value !== null) {
+        const out = Object.entries(value)
+            .filter(([subKey, _]) => ["path", "name"].includes(subKey))
+            .map(([subKey, subValue]) => `"${subKey}": ${JSON.stringify(subValue)}`)
+            .join(", ");
+        return `"${key}": ${out},`;
+    }
+    return `"${key}": ${JSON.stringify(value)},`;
 }
 
 function shouldIgnoreField(fieldName) {
@@ -37,47 +44,61 @@ function shouldIgnoreField(fieldName) {
         fieldName === "proposeCorrectionTo";
 }
 
+function valueMapper(key, testOutput) {
+    const isAlias = testOutput["is_alias"];
+    let value = testOutput[key];
+    // To make our life easier, if there is a "parent" type, we add it to the path.
+    if (key === "path") {
+        if (testOutput["parent"] !== undefined) {
+            if (value.length > 0) {
+                value += "::" + testOutput["parent"]["name"];
+            } else {
+                value = testOutput["parent"]["name"];
+            }
+        } else if (testOutput["is_alias"]) {
+            value = valueMapper(key, testOutput["original"]);
+        }
+    } else if (isAlias && key === "alias") {
+        value = testOutput["name"];
+    } else if (isAlias && ["name"].includes(key)) {
+        value = testOutput["original"][key];
+    }
+    return value;
+}
+
 // This function is only called when no matching result was found and therefore will only display
 // the diff between the two items.
-function betterLookingDiff(entry, data) {
+function betterLookingDiff(expected, testOutput) {
     let output = " {\n";
-    const spaces = "     ";
-    for (const key in entry) {
-        if (!Object.prototype.hasOwnProperty.call(entry, key)) {
+    const spaces = "    ";
+    for (const key in expected) {
+        if (!Object.prototype.hasOwnProperty.call(expected, key)) {
             continue;
         }
-        if (!data || !Object.prototype.hasOwnProperty.call(data, key)) {
-            output += "-" + spaces + contentToDiffLine(key, entry[key]) + "\n";
+        if (!testOutput || !Object.prototype.hasOwnProperty.call(testOutput, key)) {
+            output += "-" + spaces + contentToDiffLine(key, expected[key]) + "\n";
             continue;
         }
-        const value = data[key];
-        if (value !== entry[key]) {
-            output += "-" + spaces + contentToDiffLine(key, entry[key]) + "\n";
+        const value = valueMapper(key, testOutput);
+        if (value !== expected[key]) {
+            output += "-" + spaces + contentToDiffLine(key, expected[key]) + "\n";
             output += "+" + spaces + contentToDiffLine(key, value) + "\n";
         } else {
-            output += spaces + contentToDiffLine(key, value) + "\n";
+            output += spaces + " " + contentToDiffLine(key, value) + "\n";
         }
     }
     return output + " }";
 }
 
-function lookForEntry(entry, data) {
-    return data.findIndex(data_entry => {
+function lookForEntry(expected, testOutput) {
+    return testOutput.findIndex(testOutputEntry => {
         let allGood = true;
-        for (const key in entry) {
-            if (!Object.prototype.hasOwnProperty.call(entry, key)) {
+        for (const key in expected) {
+            if (!Object.prototype.hasOwnProperty.call(expected, key)) {
                 continue;
             }
-            let value = data_entry[key];
-            // To make our life easier, if there is a "parent" type, we add it to the path.
-            if (key === "path" && data_entry["parent"] !== undefined) {
-                if (value.length > 0) {
-                    value += "::" + data_entry["parent"]["name"];
-                } else {
-                    value = data_entry["parent"]["name"];
-                }
-            }
-            if (value !== entry[key]) {
+            const value = valueMapper(key, testOutputEntry);
+            if (value !== expected[key]) {
                 allGood = false;
                 break;
             }
diff --git a/src/tools/rustfmt/src/items.rs b/src/tools/rustfmt/src/items.rs
index 1a3897b51cb..7084639aca9 100644
--- a/src/tools/rustfmt/src/items.rs
+++ b/src/tools/rustfmt/src/items.rs
@@ -1172,6 +1172,7 @@ pub(crate) fn format_trait(
         unreachable!();
     };
     let ast::Trait {
+        constness,
         is_auto,
         safety,
         ident,
@@ -1182,7 +1183,8 @@ pub(crate) fn format_trait(
 
     let mut result = String::with_capacity(128);
     let header = format!(
-        "{}{}{}trait ",
+        "{}{}{}{}trait ",
+        format_constness(constness),
         format_visibility(context, &item.vis),
         format_safety(safety),
         format_auto(is_auto),
diff --git a/src/tools/suggest-tests/Cargo.toml b/src/tools/suggest-tests/Cargo.toml
deleted file mode 100644
index d6f86078d7e..00000000000
--- a/src/tools/suggest-tests/Cargo.toml
+++ /dev/null
@@ -1,8 +0,0 @@
-[package]
-name = "suggest-tests"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
-glob = "0.3.0"
-build_helper = { version = "0.1.0", path = "../../build_helper" }
diff --git a/src/tools/suggest-tests/src/dynamic_suggestions.rs b/src/tools/suggest-tests/src/dynamic_suggestions.rs
deleted file mode 100644
index f09720f1c91..00000000000
--- a/src/tools/suggest-tests/src/dynamic_suggestions.rs
+++ /dev/null
@@ -1,32 +0,0 @@
-use std::path::Path;
-
-use crate::Suggestion;
-
-type DynamicSuggestion = fn(&Path) -> Vec<Suggestion>;
-
-pub(crate) const DYNAMIC_SUGGESTIONS: &[DynamicSuggestion] = &[
-    |path: &Path| -> Vec<Suggestion> {
-        if path.starts_with("compiler/") || path.starts_with("library/") {
-            let path = path.components().take(2).collect::<Vec<_>>();
-
-            vec![Suggestion::with_single_path(
-                "test",
-                None,
-                &format!(
-                    "{}/{}",
-                    path[0].as_os_str().to_str().unwrap(),
-                    path[1].as_os_str().to_str().unwrap()
-                ),
-            )]
-        } else {
-            Vec::new()
-        }
-    },
-    |path: &Path| -> Vec<Suggestion> {
-        if path.starts_with("compiler/rustc_pattern_analysis") {
-            vec![Suggestion::new("test", None, &["tests/ui", "--test-args", "pattern"])]
-        } else {
-            Vec::new()
-        }
-    },
-];
diff --git a/src/tools/suggest-tests/src/lib.rs b/src/tools/suggest-tests/src/lib.rs
deleted file mode 100644
index cc1288c6b72..00000000000
--- a/src/tools/suggest-tests/src/lib.rs
+++ /dev/null
@@ -1,96 +0,0 @@
-use std::fmt::{self, Display};
-use std::path::Path;
-
-use dynamic_suggestions::DYNAMIC_SUGGESTIONS;
-use glob::Pattern;
-use static_suggestions::static_suggestions;
-
-mod dynamic_suggestions;
-mod static_suggestions;
-
-#[cfg(test)]
-mod tests;
-
-macro_rules! sug {
-    ($cmd:expr) => {
-        Suggestion::new($cmd, None, &[])
-    };
-
-    ($cmd:expr, $paths:expr) => {
-        Suggestion::new($cmd, None, $paths.as_slice())
-    };
-
-    ($cmd:expr, $stage:expr, $paths:expr) => {
-        Suggestion::new($cmd, Some($stage), $paths.as_slice())
-    };
-}
-
-pub(crate) use sug;
-
-pub fn get_suggestions<T: AsRef<str>>(modified_files: &[T]) -> Vec<Suggestion> {
-    let mut suggestions = Vec::new();
-
-    // static suggestions
-    for (globs, sugs) in static_suggestions().iter() {
-        let globs = globs
-            .iter()
-            .map(|glob| Pattern::new(glob).expect("Found invalid glob pattern!"))
-            .collect::<Vec<_>>();
-        let matches_some_glob = |file: &str| globs.iter().any(|glob| glob.matches(file));
-
-        if modified_files.iter().map(AsRef::as_ref).any(matches_some_glob) {
-            suggestions.extend_from_slice(sugs);
-        }
-    }
-
-    // dynamic suggestions
-    for sug in DYNAMIC_SUGGESTIONS {
-        for file in modified_files {
-            let sugs = sug(Path::new(file.as_ref()));
-
-            suggestions.extend_from_slice(&sugs);
-        }
-    }
-
-    suggestions.sort();
-    suggestions.dedup();
-
-    suggestions
-}
-
-#[derive(Clone, PartialOrd, Ord, PartialEq, Eq, Debug)]
-pub struct Suggestion {
-    pub cmd: String,
-    pub stage: Option<u32>,
-    pub paths: Vec<String>,
-}
-
-impl Suggestion {
-    pub fn new(cmd: &str, stage: Option<u32>, paths: &[&str]) -> Self {
-        Self { cmd: cmd.to_owned(), stage, paths: paths.iter().map(|p| p.to_string()).collect() }
-    }
-
-    pub fn with_single_path(cmd: &str, stage: Option<u32>, path: &str) -> Self {
-        Self::new(cmd, stage, &[path])
-    }
-}
-
-impl Display for Suggestion {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
-        write!(f, "{} ", self.cmd)?;
-
-        for path in &self.paths {
-            write!(f, "{} ", path)?;
-        }
-
-        if let Some(stage) = self.stage {
-            write!(f, "{}", stage)?;
-        } else {
-            // write a sentinel value here (in place of a stage) to be consumed
-            // by the shim in bootstrap, it will be read and ignored.
-            write!(f, "N/A")?;
-        }
-
-        Ok(())
-    }
-}
diff --git a/src/tools/suggest-tests/src/main.rs b/src/tools/suggest-tests/src/main.rs
deleted file mode 100644
index d84f8e9fa1b..00000000000
--- a/src/tools/suggest-tests/src/main.rs
+++ /dev/null
@@ -1,40 +0,0 @@
-use std::process::ExitCode;
-
-use build_helper::git::{GitConfig, get_git_modified_files};
-use suggest_tests::get_suggestions;
-
-fn main() -> ExitCode {
-    let modified_files = get_git_modified_files(
-        &GitConfig {
-            nightly_branch: &env("SUGGEST_TESTS_NIGHTLY_BRANCH"),
-            git_merge_commit_email: &env("SUGGEST_TESTS_MERGE_COMMIT_EMAIL"),
-        },
-        None,
-        &Vec::new(),
-    );
-    let modified_files = match modified_files {
-        Ok(files) => files,
-        Err(err) => {
-            eprintln!("Could not get modified files from git: \"{err}\"");
-            return ExitCode::FAILURE;
-        }
-    };
-
-    let suggestions = get_suggestions(&modified_files);
-
-    for sug in &suggestions {
-        println!("{sug}");
-    }
-
-    ExitCode::SUCCESS
-}
-
-fn env(key: &str) -> String {
-    match std::env::var(key) {
-        Ok(var) => var,
-        Err(err) => {
-            eprintln!("suggest-tests: failed to read environment variable {key}: {err}");
-            std::process::exit(1);
-        }
-    }
-}
diff --git a/src/tools/suggest-tests/src/static_suggestions.rs b/src/tools/suggest-tests/src/static_suggestions.rs
deleted file mode 100644
index d363d583b54..00000000000
--- a/src/tools/suggest-tests/src/static_suggestions.rs
+++ /dev/null
@@ -1,40 +0,0 @@
-use std::sync::OnceLock;
-
-use crate::{Suggestion, sug};
-
-// FIXME: perhaps this could use `std::lazy` when it is stabilized
-macro_rules! static_suggestions {
-    ($( [ $( $glob:expr ),* $(,)? ] => [ $( $suggestion:expr ),* $(,)? ] ),* $(,)? ) => {
-        pub(crate) fn static_suggestions() -> &'static [(Vec<&'static str>, Vec<Suggestion>)]
-        {
-            static S: OnceLock<Vec<(Vec<&'static str>, Vec<Suggestion>)>> = OnceLock::new();
-            S.get_or_init(|| vec![ $( (vec![ $($glob),* ], vec![ $($suggestion),* ]) ),*])
-        }
-    }
-}
-
-static_suggestions! {
-    ["*.md"] => [
-        sug!("test", 0, ["linkchecker"]),
-    ],
-
-    ["compiler/*"] => [
-        sug!("check"),
-        sug!("test", 1, ["tests/ui", "tests/run-make"]),
-    ],
-
-    ["compiler/rustc_mir_transform/*"] => [
-        sug!("test", 1, ["mir-opt"]),
-    ],
-
-    [
-        "compiler/rustc_mir_transform/src/coverage/*",
-        "compiler/rustc_codegen_llvm/src/coverageinfo/*",
-    ] => [
-        sug!("test", 1, ["coverage"]),
-    ],
-
-    ["src/librustdoc/*"] => [
-        sug!("test", 1, ["rustdoc"]),
-    ],
-}
diff --git a/src/tools/suggest-tests/src/tests.rs b/src/tools/suggest-tests/src/tests.rs
deleted file mode 100644
index b4149136fa3..00000000000
--- a/src/tools/suggest-tests/src/tests.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-macro_rules! sugg_test {
-    ( $( $name:ident: $paths:expr => $suggestions:expr ),* ) => {
-        $(
-            #[test]
-            fn $name() {
-                let suggestions = crate::get_suggestions(&$paths).into_iter().map(|s| s.to_string()).collect::<Vec<_>>();
-                assert_eq!(suggestions, $suggestions);
-            }
-        )*
-    };
-}
-
-sugg_test! {
-    test_error_code_docs: ["compiler/rustc_error_codes/src/error_codes/E0000.md"] =>
-        ["check N/A", "test compiler/rustc_error_codes N/A", "test linkchecker 0", "test tests/ui tests/run-make 1"],
-
-    test_rustdoc: ["src/librustdoc/src/lib.rs"] => ["test rustdoc 1"],
-
-    test_rustdoc_and_libstd: ["src/librustdoc/src/lib.rs", "library/std/src/lib.rs"] =>
-        ["test library/std N/A", "test rustdoc 1"]
-}
diff --git a/src/tools/test-float-parse/src/lib.rs b/src/tools/test-float-parse/src/lib.rs
index 0bd4878f9a6..1321a3c3354 100644
--- a/src/tools/test-float-parse/src/lib.rs
+++ b/src/tools/test-float-parse/src/lib.rs
@@ -340,7 +340,7 @@ fn launch_tests(tests: &mut [TestInfo], cfg: &Config) -> Duration {
     for test in tests.iter_mut() {
         test.progress = Some(ui::Progress::new(test, &mut all_progress_bars));
         ui::set_panic_hook(&all_progress_bars);
-        ((test.launch)(test, cfg));
+        (test.launch)(test, cfg);
     }
 
     start.elapsed()
diff --git a/src/tools/tidy/Cargo.toml b/src/tools/tidy/Cargo.toml
index 4835c220210..d995106ae02 100644
--- a/src/tools/tidy/Cargo.toml
+++ b/src/tools/tidy/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "tidy"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 autobins = false
 
 [dependencies]
diff --git a/src/tools/tidy/src/alphabetical.rs b/src/tools/tidy/src/alphabetical.rs
index 141083290c6..9ddce725106 100644
--- a/src/tools/tidy/src/alphabetical.rs
+++ b/src/tools/tidy/src/alphabetical.rs
@@ -103,7 +103,7 @@ fn check_section<'a>(
 
         let prev_line_trimmed_lowercase = prev_line.trim_start_matches(' ');
 
-        if version_sort(&trimmed_line, &prev_line_trimmed_lowercase).is_lt() {
+        if version_sort(trimmed_line, prev_line_trimmed_lowercase).is_lt() {
             tidy_error_ext!(err, bad, "{file}:{}: line not in alphabetical order", idx + 1);
         }
 
diff --git a/src/tools/tidy/src/bins.rs b/src/tools/tidy/src/bins.rs
index 9b78ba75a05..a18f549844b 100644
--- a/src/tools/tidy/src/bins.rs
+++ b/src/tools/tidy/src/bins.rs
@@ -75,7 +75,7 @@ mod os_impl {
                         return ReadOnlyFs;
                     }
 
-                    panic!("unable to create temporary file `{:?}`: {:?}", path, e);
+                    panic!("unable to create temporary file `{path:?}`: {e:?}");
                 }
             }
         }
@@ -83,12 +83,7 @@ mod os_impl {
         for &source_dir in sources {
             match check_dir(source_dir) {
                 Unsupported => return false,
-                ReadOnlyFs => {
-                    return match check_dir(output) {
-                        Supported => true,
-                        _ => false,
-                    };
-                }
+                ReadOnlyFs => return matches!(check_dir(output), Supported),
                 _ => {}
             }
         }
@@ -139,7 +134,7 @@ mod os_impl {
                     return;
                 }
 
-                if t!(is_executable(&file), file) {
+                if t!(is_executable(file), file) {
                     let rel_path = file.strip_prefix(path).unwrap();
                     let git_friendly_path = rel_path.to_str().unwrap().replace("\\", "/");
 
diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
index bf813d2131e..f43f5eae9a5 100644
--- a/src/tools/tidy/src/deps.rs
+++ b/src/tools/tidy/src/deps.rs
@@ -624,7 +624,7 @@ fn check_proc_macro_dep_list(root: &Path, cargo: &Path, bless: bool, bad: &mut b
     let is_proc_macro_pkg = |pkg: &Package| pkg.targets.iter().any(|target| target.is_proc_macro());
 
     let mut proc_macro_deps = HashSet::new();
-    for pkg in metadata.packages.iter().filter(|pkg| is_proc_macro_pkg(*pkg)) {
+    for pkg in metadata.packages.iter().filter(|pkg| is_proc_macro_pkg(pkg)) {
         deps_of(&metadata, &pkg.id, &mut proc_macro_deps);
     }
     // Remove the proc-macro crates themselves
diff --git a/src/tools/tidy/src/error_codes.rs b/src/tools/tidy/src/error_codes.rs
index bb61412f678..65aa89fe801 100644
--- a/src/tools/tidy/src/error_codes.rs
+++ b/src/tools/tidy/src/error_codes.rs
@@ -119,8 +119,7 @@ fn extract_error_codes(root_path: &Path, errors: &mut Vec<String>) -> Vec<String
             let Some(split_line) = split_line else {
                 errors.push(format!(
                     "{path}:{line_index}: Expected a line with the format `Eabcd: abcd, \
-                    but got \"{}\" without a `:` delimiter",
-                    line,
+                    but got \"{line}\" without a `:` delimiter",
                 ));
                 continue;
             };
@@ -129,10 +128,8 @@ fn extract_error_codes(root_path: &Path, errors: &mut Vec<String>) -> Vec<String
 
             // If this is a duplicate of another error code, emit a fatal error.
             if error_codes.contains(&err_code) {
-                errors.push(format!(
-                    "{path}:{line_index}: Found duplicate error code: `{}`",
-                    err_code
-                ));
+                errors
+                    .push(format!("{path}:{line_index}: Found duplicate error code: `{err_code}`"));
                 continue;
             }
 
@@ -145,8 +142,7 @@ fn extract_error_codes(root_path: &Path, errors: &mut Vec<String>) -> Vec<String
             let Some(rest) = rest else {
                 errors.push(format!(
                     "{path}:{line_index}: Expected a line with the format `Eabcd: abcd, \
-                    but got \"{}\" without a `,` delimiter",
-                    line,
+                    but got \"{line}\" without a `,` delimiter",
                 ));
                 continue;
             };
@@ -209,7 +205,7 @@ fn check_error_codes_docs(
         }
 
         let (found_code_example, found_proper_doctest, emit_ignore_warning, no_longer_emitted) =
-            check_explanation_has_doctest(&contents, &err_code);
+            check_explanation_has_doctest(contents, err_code);
 
         if emit_ignore_warning {
             verbose_print!(
@@ -232,7 +228,7 @@ fn check_error_codes_docs(
             return;
         }
 
-        let test_ignored = IGNORE_DOCTEST_CHECK.contains(&&err_code);
+        let test_ignored = IGNORE_DOCTEST_CHECK.contains(&err_code);
 
         // Check that the explanation has a doctest, and if it shouldn't, that it doesn't
         if !found_proper_doctest && !test_ignored {
@@ -300,7 +296,7 @@ fn check_error_codes_tests(
     let tests_path = root_path.join(Path::new(ERROR_TESTS_PATH));
 
     for code in error_codes {
-        let test_path = tests_path.join(format!("{}.stderr", code));
+        let test_path = tests_path.join(format!("{code}.stderr"));
 
         if !test_path.exists() && !IGNORE_UI_TEST_CHECK.contains(&code.as_str()) {
             verbose_print!(
@@ -388,7 +384,7 @@ fn check_error_codes_used(
 
                     if !error_codes.contains(&error_code) {
                         // This error code isn't properly defined, we must error.
-                        errors.push(format!("Error code `{}` is used in the compiler but not defined and documented in `compiler/rustc_error_codes/src/lib.rs`.", error_code));
+                        errors.push(format!("Error code `{error_code}` is used in the compiler but not defined and documented in `compiler/rustc_error_codes/src/lib.rs`."));
                         continue;
                     }
 
diff --git a/src/tools/tidy/src/ext_tool_checks.rs b/src/tools/tidy/src/ext_tool_checks.rs
index d2da63a9703..911d4daae5c 100644
--- a/src/tools/tidy/src/ext_tool_checks.rs
+++ b/src/tools/tidy/src/ext_tool_checks.rs
@@ -20,8 +20,13 @@
 use std::ffi::OsStr;
 use std::path::{Path, PathBuf};
 use std::process::Command;
+use std::str::FromStr;
 use std::{fmt, fs, io};
 
+use crate::CiInfo;
+
+mod rustdoc_js;
+
 const MIN_PY_REV: (u32, u32) = (3, 9);
 const MIN_PY_REV_STR: &str = "≥3.9";
 
@@ -36,15 +41,30 @@ const RUFF_CONFIG_PATH: &[&str] = &["src", "tools", "tidy", "config", "ruff.toml
 const RUFF_CACHE_PATH: &[&str] = &["cache", "ruff_cache"];
 const PIP_REQ_PATH: &[&str] = &["src", "tools", "tidy", "config", "requirements.txt"];
 
+// this must be kept in sync with with .github/workflows/spellcheck.yml
+const SPELLCHECK_DIRS: &[&str] = &["compiler", "library", "src/bootstrap", "src/librustdoc"];
+
 pub fn check(
     root_path: &Path,
     outdir: &Path,
+    ci_info: &CiInfo,
+    librustdoc_path: &Path,
+    tools_path: &Path,
     bless: bool,
     extra_checks: Option<&str>,
     pos_args: &[String],
     bad: &mut bool,
 ) {
-    if let Err(e) = check_impl(root_path, outdir, bless, extra_checks, pos_args) {
+    if let Err(e) = check_impl(
+        root_path,
+        outdir,
+        ci_info,
+        librustdoc_path,
+        tools_path,
+        bless,
+        extra_checks,
+        pos_args,
+    ) {
         tidy_error!(bad, "{e}");
     }
 }
@@ -52,34 +72,59 @@ pub fn check(
 fn check_impl(
     root_path: &Path,
     outdir: &Path,
+    ci_info: &CiInfo,
+    librustdoc_path: &Path,
+    tools_path: &Path,
     bless: bool,
     extra_checks: Option<&str>,
     pos_args: &[String],
 ) -> Result<(), Error> {
-    let show_diff = std::env::var("TIDY_PRINT_DIFF")
-        .map_or(false, |v| v.eq_ignore_ascii_case("true") || v == "1");
+    let show_diff =
+        std::env::var("TIDY_PRINT_DIFF").is_ok_and(|v| v.eq_ignore_ascii_case("true") || v == "1");
 
     // Split comma-separated args up
     let lint_args = match extra_checks {
-        Some(s) => s.strip_prefix("--extra-checks=").unwrap().split(',').collect(),
+        Some(s) => s
+            .strip_prefix("--extra-checks=")
+            .unwrap()
+            .split(',')
+            .map(|s| {
+                if s == "spellcheck:fix" {
+                    eprintln!("warning: `spellcheck:fix` is no longer valid, use `--extra-checks=spellcheck --bless`");
+                }
+                (ExtraCheckArg::from_str(s), s)
+            })
+            .filter_map(|(res, src)| match res {
+                Ok(arg) => {
+                    if arg.is_inactive_auto(ci_info) {
+                        None
+                    } else {
+                        Some(arg)
+                    }
+                }
+                Err(err) => {
+                    // only warn because before bad extra checks would be silently ignored.
+                    eprintln!("warning: bad extra check argument {src:?}: {err:?}");
+                    None
+                }
+            })
+            .collect(),
         None => vec![],
     };
 
-    if lint_args.contains(&"spellcheck:fix") {
-        return Err(Error::Generic(
-            "`spellcheck:fix` is no longer valid, use `--extra=check=spellcheck --bless`"
-                .to_string(),
-        ));
+    macro_rules! extra_check {
+        ($lang:ident, $kind:ident) => {
+            lint_args.iter().any(|arg| arg.matches(ExtraCheckLang::$lang, ExtraCheckKind::$kind))
+        };
     }
 
-    let python_all = lint_args.contains(&"py");
-    let python_lint = lint_args.contains(&"py:lint") || python_all;
-    let python_fmt = lint_args.contains(&"py:fmt") || python_all;
-    let shell_all = lint_args.contains(&"shell");
-    let shell_lint = lint_args.contains(&"shell:lint") || shell_all;
-    let cpp_all = lint_args.contains(&"cpp");
-    let cpp_fmt = lint_args.contains(&"cpp:fmt") || cpp_all;
-    let spellcheck = lint_args.contains(&"spellcheck");
+    let python_lint = extra_check!(Py, Lint);
+    let python_fmt = extra_check!(Py, Fmt);
+    let shell_lint = extra_check!(Shell, Lint);
+    let cpp_fmt = extra_check!(Cpp, Fmt);
+    let spellcheck = extra_check!(Spellcheck, None);
+    let js_lint = extra_check!(Js, Lint);
+    let js_typecheck = extra_check!(Js, Typecheck);
 
     let mut py_path = None;
 
@@ -113,7 +158,7 @@ fn check_impl(
             );
         }
         // Rethrow error
-        let _ = res?;
+        res?;
     }
 
     if python_fmt {
@@ -145,7 +190,7 @@ fn check_impl(
         }
 
         // Rethrow error
-        let _ = res?;
+        res?;
     }
 
     if cpp_fmt {
@@ -216,7 +261,7 @@ fn check_impl(
             }
         }
         // Rethrow error
-        let _ = res?;
+        res?;
     }
 
     if shell_lint {
@@ -234,15 +279,9 @@ fn check_impl(
 
     if spellcheck {
         let config_path = root_path.join("typos.toml");
-        // sync target files with .github/workflows/spellcheck.yml
-        let mut args = vec![
-            "-c",
-            config_path.as_os_str().to_str().unwrap(),
-            "./compiler",
-            "./library",
-            "./src/bootstrap",
-            "./src/librustdoc",
-        ];
+        let mut args = vec!["-c", config_path.as_os_str().to_str().unwrap()];
+
+        args.extend_from_slice(SPELLCHECK_DIRS);
 
         if bless {
             eprintln!("spellcheck files and fix");
@@ -253,6 +292,19 @@ fn check_impl(
         spellcheck_runner(&args)?;
     }
 
+    if js_lint || js_typecheck {
+        rustdoc_js::npm_install(root_path, outdir)?;
+    }
+
+    if js_lint {
+        rustdoc_js::lint(outdir, librustdoc_path, tools_path)?;
+        rustdoc_js::es_check(outdir, librustdoc_path)?;
+    }
+
+    if js_typecheck {
+        rustdoc_js::typecheck(outdir, librustdoc_path)?;
+    }
+
     Ok(())
 }
 
@@ -264,8 +316,8 @@ fn run_ruff(
     file_args: &[&OsStr],
     ruff_args: &[&OsStr],
 ) -> Result<(), Error> {
-    let mut cfg_args_ruff = cfg_args.into_iter().copied().collect::<Vec<_>>();
-    let mut file_args_ruff = file_args.into_iter().copied().collect::<Vec<_>>();
+    let mut cfg_args_ruff = cfg_args.to_vec();
+    let mut file_args_ruff = file_args.to_vec();
 
     let mut cfg_path = root_path.to_owned();
     cfg_path.extend(RUFF_CONFIG_PATH);
@@ -283,7 +335,7 @@ fn run_ruff(
         file_args_ruff.push(root_path.as_os_str());
     }
 
-    let mut args: Vec<&OsStr> = ruff_args.into_iter().copied().collect();
+    let mut args: Vec<&OsStr> = ruff_args.to_vec();
     args.extend(merge_args(&cfg_args_ruff, &file_args_ruff));
     py_runner(py_path, true, None, "ruff", &args)
 }
@@ -638,3 +690,142 @@ impl From<io::Error> for Error {
         Self::Io(value)
     }
 }
+
+#[derive(Debug)]
+enum ExtraCheckParseError {
+    #[allow(dead_code, reason = "shown through Debug")]
+    UnknownKind(String),
+    #[allow(dead_code)]
+    UnknownLang(String),
+    UnsupportedKindForLang,
+    /// Too many `:`
+    TooManyParts,
+    /// Tried to parse the empty string
+    Empty,
+    /// `auto` specified without lang part.
+    AutoRequiresLang,
+}
+
+struct ExtraCheckArg {
+    auto: bool,
+    lang: ExtraCheckLang,
+    /// None = run all extra checks for the given lang
+    kind: Option<ExtraCheckKind>,
+}
+
+impl ExtraCheckArg {
+    fn matches(&self, lang: ExtraCheckLang, kind: ExtraCheckKind) -> bool {
+        self.lang == lang && self.kind.map(|k| k == kind).unwrap_or(true)
+    }
+
+    /// Returns `true` if this is an auto arg and the relevant files are not modified.
+    fn is_inactive_auto(&self, ci_info: &CiInfo) -> bool {
+        if !self.auto {
+            return false;
+        }
+        let ext = match self.lang {
+            ExtraCheckLang::Py => ".py",
+            ExtraCheckLang::Cpp => ".cpp",
+            ExtraCheckLang::Shell => ".sh",
+            ExtraCheckLang::Js => ".js",
+            ExtraCheckLang::Spellcheck => {
+                return !crate::files_modified(ci_info, |s| {
+                    SPELLCHECK_DIRS.iter().any(|dir| Path::new(s).starts_with(dir))
+                });
+            }
+        };
+        !crate::files_modified(ci_info, |s| s.ends_with(ext))
+    }
+
+    fn has_supported_kind(&self) -> bool {
+        let Some(kind) = self.kind else {
+            // "run all extra checks" mode is supported for all languages.
+            return true;
+        };
+        use ExtraCheckKind::*;
+        let supported_kinds: &[_] = match self.lang {
+            ExtraCheckLang::Py => &[Fmt, Lint],
+            ExtraCheckLang::Cpp => &[Fmt],
+            ExtraCheckLang::Shell => &[Lint],
+            ExtraCheckLang::Spellcheck => &[],
+            ExtraCheckLang::Js => &[Lint, Typecheck],
+        };
+        supported_kinds.contains(&kind)
+    }
+}
+
+impl FromStr for ExtraCheckArg {
+    type Err = ExtraCheckParseError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let mut auto = false;
+        let mut parts = s.split(':');
+        let Some(mut first) = parts.next() else {
+            return Err(ExtraCheckParseError::Empty);
+        };
+        if first == "auto" {
+            let Some(part) = parts.next() else {
+                return Err(ExtraCheckParseError::AutoRequiresLang);
+            };
+            auto = true;
+            first = part;
+        }
+        let second = parts.next();
+        if parts.next().is_some() {
+            return Err(ExtraCheckParseError::TooManyParts);
+        }
+        let arg = Self { auto, lang: first.parse()?, kind: second.map(|s| s.parse()).transpose()? };
+        if !arg.has_supported_kind() {
+            return Err(ExtraCheckParseError::UnsupportedKindForLang);
+        }
+
+        Ok(arg)
+    }
+}
+
+#[derive(PartialEq, Copy, Clone)]
+enum ExtraCheckLang {
+    Py,
+    Shell,
+    Cpp,
+    Spellcheck,
+    Js,
+}
+
+impl FromStr for ExtraCheckLang {
+    type Err = ExtraCheckParseError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(match s {
+            "py" => Self::Py,
+            "shell" => Self::Shell,
+            "cpp" => Self::Cpp,
+            "spellcheck" => Self::Spellcheck,
+            "js" => Self::Js,
+            _ => return Err(ExtraCheckParseError::UnknownLang(s.to_string())),
+        })
+    }
+}
+
+#[derive(PartialEq, Copy, Clone)]
+enum ExtraCheckKind {
+    Lint,
+    Fmt,
+    Typecheck,
+    /// Never parsed, but used as a placeholder for
+    /// langs that never have a specific kind.
+    None,
+}
+
+impl FromStr for ExtraCheckKind {
+    type Err = ExtraCheckParseError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(match s {
+            "lint" => Self::Lint,
+            "fmt" => Self::Fmt,
+            "typecheck" => Self::Typecheck,
+            _ => return Err(ExtraCheckParseError::UnknownKind(s.to_string())),
+        })
+    }
+}
diff --git a/src/tools/tidy/src/ext_tool_checks/rustdoc_js.rs b/src/tools/tidy/src/ext_tool_checks/rustdoc_js.rs
new file mode 100644
index 00000000000..c1a62cedd33
--- /dev/null
+++ b/src/tools/tidy/src/ext_tool_checks/rustdoc_js.rs
@@ -0,0 +1,114 @@
+//! Tidy check to ensure that rustdoc templates didn't forget a `{# #}` to strip extra whitespace
+//! characters.
+
+use std::ffi::OsStr;
+use std::io;
+use std::path::{Path, PathBuf};
+use std::process::{Child, Command};
+
+use build_helper::npm;
+use ignore::DirEntry;
+
+use crate::walk::walk_no_read;
+
+fn node_module_bin(outdir: &Path, name: &str) -> PathBuf {
+    outdir.join("node_modules/.bin").join(name)
+}
+
+fn spawn_cmd(cmd: &mut Command) -> Result<Child, io::Error> {
+    cmd.spawn().map_err(|err| {
+        eprintln!("unable to run {cmd:?} due to {err:?}");
+        err
+    })
+}
+
+/// install all js dependencies from package.json.
+pub(super) fn npm_install(root_path: &Path, outdir: &Path) -> Result<(), super::Error> {
+    // FIXME(lolbinarycat): make this obey build.npm bootstrap option
+    npm::install(root_path, outdir, Path::new("npm"))?;
+    Ok(())
+}
+
+fn rustdoc_js_files(librustdoc_path: &Path) -> Vec<PathBuf> {
+    let mut files = Vec::new();
+    walk_no_read(
+        &[&librustdoc_path.join("html/static/js")],
+        |path, is_dir| is_dir || path.extension().is_none_or(|ext| ext != OsStr::new("js")),
+        &mut |path: &DirEntry| {
+            files.push(path.path().into());
+        },
+    );
+    return files;
+}
+
+fn run_eslint(outdir: &Path, args: &[PathBuf], config_folder: PathBuf) -> Result<(), super::Error> {
+    let mut child = spawn_cmd(
+        Command::new(node_module_bin(outdir, "eslint"))
+            .arg("-c")
+            .arg(config_folder.join(".eslintrc.js"))
+            .args(args),
+    )?;
+    match child.wait() {
+        Ok(exit_status) => {
+            if exit_status.success() {
+                return Ok(());
+            }
+            Err(super::Error::FailedCheck("eslint command failed"))
+        }
+        Err(error) => Err(super::Error::Generic(format!("eslint command failed: {error:?}"))),
+    }
+}
+
+pub(super) fn lint(
+    outdir: &Path,
+    librustdoc_path: &Path,
+    tools_path: &Path,
+) -> Result<(), super::Error> {
+    let files_to_check = rustdoc_js_files(librustdoc_path);
+    println!("Running eslint on rustdoc JS files");
+    run_eslint(outdir, &files_to_check, librustdoc_path.join("html/static"))?;
+
+    run_eslint(outdir, &[tools_path.join("rustdoc-js/tester.js")], tools_path.join("rustdoc-js"))?;
+    run_eslint(
+        outdir,
+        &[tools_path.join("rustdoc-gui/tester.js")],
+        tools_path.join("rustdoc-gui"),
+    )?;
+    Ok(())
+}
+
+pub(super) fn typecheck(outdir: &Path, librustdoc_path: &Path) -> Result<(), super::Error> {
+    // use npx to ensure correct version
+    let mut child = spawn_cmd(
+        Command::new(node_module_bin(outdir, "tsc"))
+            .arg("-p")
+            .arg(librustdoc_path.join("html/static/js/tsconfig.json")),
+    )?;
+    match child.wait() {
+        Ok(exit_status) => {
+            if exit_status.success() {
+                return Ok(());
+            }
+            Err(super::Error::FailedCheck("tsc command failed"))
+        }
+        Err(error) => Err(super::Error::Generic(format!("tsc command failed: {error:?}"))),
+    }
+}
+
+pub(super) fn es_check(outdir: &Path, librustdoc_path: &Path) -> Result<(), super::Error> {
+    let files_to_check = rustdoc_js_files(librustdoc_path);
+    let mut cmd = Command::new(node_module_bin(outdir, "es-check"));
+    cmd.arg("es2019");
+    for f in files_to_check {
+        cmd.arg(f);
+    }
+    match spawn_cmd(&mut cmd)?.wait() {
+        Ok(exit_status) => {
+            if exit_status.success() {
+                return Ok(());
+            }
+            Err(super::Error::FailedCheck("es-check command failed"))
+        }
+        Err(error) => Err(super::Error::Generic(format!("es-check command failed: {error:?}"))),
+    }
+}
diff --git a/src/tools/tidy/src/extdeps.rs b/src/tools/tidy/src/extdeps.rs
index 55f937aeacf..bc217a55cc1 100644
--- a/src/tools/tidy/src/extdeps.rs
+++ b/src/tools/tidy/src/extdeps.rs
@@ -41,7 +41,7 @@ pub fn check(root: &Path, bad: &mut bool) {
             let source = line.split_once('=').unwrap().1.trim();
 
             // Ensure source is allowed.
-            if !ALLOWED_SOURCES.contains(&&*source) {
+            if !ALLOWED_SOURCES.contains(&source) {
                 tidy_error!(bad, "invalid source: {}", source);
             }
         }
diff --git a/src/tools/tidy/src/features.rs b/src/tools/tidy/src/features.rs
index 6093e7fd263..fb00b3a943f 100644
--- a/src/tools/tidy/src/features.rs
+++ b/src/tools/tidy/src/features.rs
@@ -125,8 +125,8 @@ pub fn check(
                 let gate_test_str = "gate-test-";
 
                 let feature_name = match line.find(gate_test_str) {
-                    // NB: the `splitn` always succeeds, even if the delimiter is not present.
-                    Some(i) => line[i + gate_test_str.len()..].splitn(2, ' ').next().unwrap(),
+                    // `split` always contains at least 1 element, even if the delimiter is not present.
+                    Some(i) => line[i + gate_test_str.len()..].split(' ').next().unwrap(),
                     None => continue,
                 };
                 match features.get_mut(feature_name) {
@@ -135,16 +135,14 @@ pub fn check(
                             err(&format!(
                                 "The file is already marked as gate test \
                                       through its name, no need for a \
-                                      'gate-test-{}' comment",
-                                feature_name
+                                      'gate-test-{feature_name}' comment"
                             ));
                         }
                         f.has_gate_test = true;
                     }
                     None => {
                         err(&format!(
-                            "gate-test test found referencing a nonexistent feature '{}'",
-                            feature_name
+                            "gate-test test found referencing a nonexistent feature '{feature_name}'"
                         ));
                     }
                 }
@@ -170,8 +168,7 @@ pub fn check(
         );
         println!(
             "Hint: If you already have such a test and don't want to rename it,\
-                \n      you can also add a // gate-test-{} line to the test file.",
-            name
+                \n      you can also add a // gate-test-{name} line to the test file."
         );
     }
 
@@ -231,7 +228,7 @@ pub fn check(
 fn get_version_and_channel(src_path: &Path) -> (Version, String) {
     let version_str = t!(std::fs::read_to_string(src_path.join("version")));
     let version_str = version_str.trim();
-    let version = t!(std::str::FromStr::from_str(&version_str).map_err(|e| format!("{e:?}")));
+    let version = t!(std::str::FromStr::from_str(version_str).map_err(|e| format!("{e:?}")));
     let channel_str = t!(std::fs::read_to_string(src_path.join("ci").join("channel")));
     (version, channel_str.trim().to_owned())
 }
@@ -334,11 +331,9 @@ fn collect_lang_features_in(features: &mut Features, base: &Path, file: &str, ba
             continue;
         }
 
-        if in_feature_group {
-            if let Some(doc_comment) = line.strip_prefix("///") {
-                doc_comments.push(doc_comment.trim().to_string());
-                continue;
-            }
+        if in_feature_group && let Some(doc_comment) = line.strip_prefix("///") {
+            doc_comments.push(doc_comment.trim().to_string());
+            continue;
         }
 
         let mut parts = line.split(',');
@@ -468,22 +463,23 @@ fn get_and_check_lib_features(
     map_lib_features(base_src_path, &mut |res, file, line| match res {
         Ok((name, f)) => {
             let mut check_features = |f: &Feature, list: &Features, display: &str| {
-                if let Some(ref s) = list.get(name) {
-                    if f.tracking_issue != s.tracking_issue && f.level != Status::Accepted {
-                        tidy_error!(
-                            bad,
-                            "{}:{}: feature gate {} has inconsistent `issue`: \"{}\" mismatches the {} `issue` of \"{}\"",
-                            file.display(),
-                            line,
-                            name,
-                            f.tracking_issue_display(),
-                            display,
-                            s.tracking_issue_display(),
-                        );
-                    }
+                if let Some(s) = list.get(name)
+                    && f.tracking_issue != s.tracking_issue
+                    && f.level != Status::Accepted
+                {
+                    tidy_error!(
+                        bad,
+                        "{}:{}: feature gate {} has inconsistent `issue`: \"{}\" mismatches the {} `issue` of \"{}\"",
+                        file.display(),
+                        line,
+                        name,
+                        f.tracking_issue_display(),
+                        display,
+                        s.tracking_issue_display(),
+                    );
                 }
             };
-            check_features(&f, &lang_features, "corresponding lang feature");
+            check_features(&f, lang_features, "corresponding lang feature");
             check_features(&f, &lib_features, "previous");
             lib_features.insert(name.to_owned(), f);
         }
@@ -543,7 +539,7 @@ fn map_lib_features(
                     continue;
                 }
 
-                if let Some((ref name, ref mut f)) = becoming_feature {
+                if let Some((name, ref mut f)) = becoming_feature {
                     if f.tracking_issue.is_none() {
                         f.tracking_issue = find_attr_val(line, "issue").and_then(handle_issue_none);
                     }
diff --git a/src/tools/tidy/src/features/version.rs b/src/tools/tidy/src/features/version.rs
index 6a902e80f8e..0e0629a48e2 100644
--- a/src/tools/tidy/src/features/version.rs
+++ b/src/tools/tidy/src/features/version.rs
@@ -20,7 +20,7 @@ impl fmt::Display for Version {
             Version::Explicit { parts } => {
                 f.pad(&format!("{}.{}.{}", parts[0], parts[1], parts[2]))
             }
-            Version::CurrentPlaceholder => f.pad(&format!("CURRENT")),
+            Version::CurrentPlaceholder => f.pad("CURRENT"),
         }
     }
 }
diff --git a/src/tools/tidy/src/features/version/tests.rs b/src/tools/tidy/src/features/version/tests.rs
index 7701dce2df1..453ba40586e 100644
--- a/src/tools/tidy/src/features/version/tests.rs
+++ b/src/tools/tidy/src/features/version/tests.rs
@@ -33,6 +33,6 @@ fn test_to_string() {
 
     assert_eq!(v_1_0_0.to_string(), "1.0.0");
     assert_eq!(v_1_32_1.to_string(), "1.32.1");
-    assert_eq!(format!("{:<8}", v_1_32_1), "1.32.1  ");
-    assert_eq!(format!("{:>8}", v_1_32_1), "  1.32.1");
+    assert_eq!(format!("{v_1_32_1:<8}"), "1.32.1  ");
+    assert_eq!(format!("{v_1_32_1:>8}"), "  1.32.1");
 }
diff --git a/src/tools/tidy/src/filenames.rs b/src/tools/tidy/src/filenames.rs
new file mode 100644
index 00000000000..53115f4eaa4
--- /dev/null
+++ b/src/tools/tidy/src/filenames.rs
@@ -0,0 +1,40 @@
+//! Tidy check to ensure that there are no filenames containing forbidden characters
+//! checked into the source tree by accident:
+//! - Non-UTF8 filenames
+//! - Control characters such as CR or TAB
+//! - Filenames containing ":" as they are not supported on Windows
+//!
+//! Only files added to git are checked, as it may be acceptable to have temporary
+//! invalid filenames in the local directory during development.
+
+use std::path::Path;
+use std::process::Command;
+
+pub fn check(root_path: &Path, bad: &mut bool) {
+    let stat_output = Command::new("git")
+        .arg("-C")
+        .arg(root_path)
+        .args(["ls-files", "-z"])
+        .output()
+        .unwrap()
+        .stdout;
+    for filename in stat_output.split(|&b| b == 0) {
+        match str::from_utf8(filename) {
+            Err(_) => tidy_error!(
+                bad,
+                r#"non-UTF8 file names are not supported: "{}""#,
+                String::from_utf8_lossy(filename),
+            ),
+            Ok(name) if name.chars().any(|c| c.is_control()) => tidy_error!(
+                bad,
+                r#"control characters are not supported in file names: "{}""#,
+                String::from_utf8_lossy(filename),
+            ),
+            Ok(name) if name.contains(':') => tidy_error!(
+                bad,
+                r#"":" is not supported in file names because of Windows compatibility: "{name}""#,
+            ),
+            _ => (),
+        }
+    }
+}
diff --git a/src/tools/tidy/src/fluent_alphabetical.rs b/src/tools/tidy/src/fluent_alphabetical.rs
index 6f154b92eff..48d14a37514 100644
--- a/src/tools/tidy/src/fluent_alphabetical.rs
+++ b/src/tools/tidy/src/fluent_alphabetical.rs
@@ -13,8 +13,8 @@ fn message() -> &'static Regex {
     static_regex!(r#"(?m)^([a-zA-Z0-9_]+)\s*=\s*"#)
 }
 
-fn filter_fluent(path: &Path) -> bool {
-    if let Some(ext) = path.extension() { ext.to_str() != Some("ftl") } else { true }
+fn is_fluent(path: &Path) -> bool {
+    path.extension().is_some_and(|ext| ext == "flt")
 }
 
 fn check_alphabetic(
@@ -92,7 +92,7 @@ pub fn check(path: &Path, bless: bool, bad: &mut bool) {
     let mut all_defined_msgs = HashMap::new();
     walk(
         path,
-        |path, is_dir| filter_dirs(path) || (!is_dir && filter_fluent(path)),
+        |path, is_dir| filter_dirs(path) || (!is_dir && !is_fluent(path)),
         &mut |ent, contents| {
             if bless {
                 let sorted = sort_messages(
@@ -104,7 +104,7 @@ pub fn check(path: &Path, bless: bool, bad: &mut bool) {
                 if sorted != contents {
                     let mut f =
                         OpenOptions::new().write(true).truncate(true).open(ent.path()).unwrap();
-                    f.write(sorted.as_bytes()).unwrap();
+                    f.write_all(sorted.as_bytes()).unwrap();
                 }
             } else {
                 check_alphabetic(
diff --git a/src/tools/tidy/src/fluent_period.rs b/src/tools/tidy/src/fluent_period.rs
index 6a136e5aec6..836b5699289 100644
--- a/src/tools/tidy/src/fluent_period.rs
+++ b/src/tools/tidy/src/fluent_period.rs
@@ -33,14 +33,14 @@ fn check_period(filename: &str, contents: &str, bad: &mut bool) {
                 continue;
             }
 
-            if let Some(pat) = &m.value {
-                if let Some(PatternElement::TextElement { value }) = pat.elements.last() {
-                    // We don't care about ellipses.
-                    if value.ends_with(".") && !value.ends_with("...") {
-                        let ll = find_line(contents, *value);
-                        let name = m.id.name;
-                        tidy_error!(bad, "{filename}:{ll}: message `{name}` ends in a period");
-                    }
+            if let Some(pat) = &m.value
+                && let Some(PatternElement::TextElement { value }) = pat.elements.last()
+            {
+                // We don't care about ellipses.
+                if value.ends_with(".") && !value.ends_with("...") {
+                    let ll = find_line(contents, value);
+                    let name = m.id.name;
+                    tidy_error!(bad, "{filename}:{ll}: message `{name}` ends in a period");
                 }
             }
 
@@ -50,12 +50,13 @@ fn check_period(filename: &str, contents: &str, bad: &mut bool) {
                     continue;
                 }
 
-                if let Some(PatternElement::TextElement { value }) = attr.value.elements.last() {
-                    if value.ends_with(".") && !value.ends_with("...") {
-                        let ll = find_line(contents, *value);
-                        let name = attr.id.name;
-                        tidy_error!(bad, "{filename}:{ll}: attr `{name}` ends in a period");
-                    }
+                if let Some(PatternElement::TextElement { value }) = attr.value.elements.last()
+                    && value.ends_with(".")
+                    && !value.ends_with("...")
+                {
+                    let ll = find_line(contents, value);
+                    let name = attr.id.name;
+                    tidy_error!(bad, "{filename}:{ll}: attr `{name}` ends in a period");
                 }
             }
         }
diff --git a/src/tools/tidy/src/fluent_used.rs b/src/tools/tidy/src/fluent_used.rs
index ab56b5f0b0e..909bf482ddf 100644
--- a/src/tools/tidy/src/fluent_used.rs
+++ b/src/tools/tidy/src/fluent_used.rs
@@ -12,9 +12,9 @@ fn filter_used_messages(
 ) {
     // we don't just check messages never appear in Rust files,
     // because messages can be used as parts of other fluent messages in Fluent files,
-    // so we do checking messages appear only once in all Rust and Fluent files.
-    let mut matches = static_regex!(r"\w+").find_iter(contents);
-    while let Some(name) = matches.next() {
+    // so we check messages appear only once in all Rust and Fluent files.
+    let matches = static_regex!(r"\w+").find_iter(contents);
+    for name in matches {
         if let Some((name, filename)) = msgs_not_appeared_yet.remove_entry(name.as_str()) {
             // if one msg appears for the first time,
             // remove it from `msgs_not_appeared_yet` and insert it into `msgs_appeared_only_once`.
diff --git a/src/tools/tidy/src/gcc_submodule.rs b/src/tools/tidy/src/gcc_submodule.rs
index 952ebe9e0cf..5d726c3ea48 100644
--- a/src/tools/tidy/src/gcc_submodule.rs
+++ b/src/tools/tidy/src/gcc_submodule.rs
@@ -7,7 +7,9 @@ use std::process::Command;
 pub fn check(root_path: &Path, compiler_path: &Path, bad: &mut bool) {
     let cg_gcc_version_path = compiler_path.join("rustc_codegen_gcc/libgccjit.version");
     let cg_gcc_version = std::fs::read_to_string(&cg_gcc_version_path)
-        .expect(&format!("Cannot read GCC version from {}", cg_gcc_version_path.display()))
+        .unwrap_or_else(|_| {
+            panic!("Cannot read GCC version from {}", cg_gcc_version_path.display())
+        })
         .trim()
         .to_string();
 
@@ -27,14 +29,13 @@ pub fn check(root_path: &Path, compiler_path: &Path, bad: &mut bool) {
     //  e607be166673a8de9fc07f6f02c60426e556c5f2 src/gcc (master-e607be166673a8de9fc07f6f02c60426e556c5f2.e607be)
     // +e607be166673a8de9fc07f6f02c60426e556c5f2 src/gcc (master-e607be166673a8de9fc07f6f02c60426e556c5f2.e607be)
     let git_output = String::from_utf8_lossy(&git_output.stdout)
-        .trim()
         .split_whitespace()
         .next()
         .unwrap_or_default()
         .to_string();
 
     // The SHA can start with + if the submodule is modified or - if it is not checked out.
-    let gcc_submodule_sha = git_output.trim_start_matches(&['+', '-']);
+    let gcc_submodule_sha = git_output.trim_start_matches(['+', '-']);
     if gcc_submodule_sha != cg_gcc_version {
         *bad = true;
         eprintln!(
diff --git a/src/tools/tidy/src/issues.txt b/src/tools/tidy/src/issues.txt
index cac4dba2b49..77414bec82d 100644
--- a/src/tools/tidy/src/issues.txt
+++ b/src/tools/tidy/src/issues.txt
@@ -1021,7 +1021,6 @@ ui/foreign/issue-91370-foreign-fn-block-impl.rs
 ui/foreign/issue-99276-same-type-lifetimes.rs
 ui/function-pointer/issue-102289.rs
 ui/functions-closures/closure-expected-type/issue-38714.rs
-ui/generic-associated-types/bugs/issue-100013.rs
 ui/generic-associated-types/bugs/issue-80626.rs
 ui/generic-associated-types/bugs/issue-87735.rs
 ui/generic-associated-types/bugs/issue-87755.rs
@@ -1099,7 +1098,6 @@ ui/generic-associated-types/issue-90729.rs
 ui/generic-associated-types/issue-91139.rs
 ui/generic-associated-types/issue-91883.rs
 ui/generic-associated-types/issue-92033.rs
-ui/generic-associated-types/issue-92096.rs
 ui/generic-associated-types/issue-92280.rs
 ui/generic-associated-types/issue-92954.rs
 ui/generic-associated-types/issue-93141.rs
@@ -2338,7 +2336,6 @@ ui/issues/issue-50415.rs
 ui/issues/issue-50442.rs
 ui/issues/issue-50471.rs
 ui/issues/issue-50518.rs
-ui/issues/issue-50571.rs
 ui/issues/issue-50581.rs
 ui/issues/issue-50582.rs
 ui/issues/issue-50585.rs
diff --git a/src/tools/tidy/src/lib.rs b/src/tools/tidy/src/lib.rs
index 237737f0f16..5f6796a9150 100644
--- a/src/tools/tidy/src/lib.rs
+++ b/src/tools/tidy/src/lib.rs
@@ -13,8 +13,9 @@ use termcolor::WriteColor;
 
 macro_rules! static_regex {
     ($re:literal) => {{
-        static RE: ::std::sync::OnceLock<::regex::Regex> = ::std::sync::OnceLock::new();
-        RE.get_or_init(|| ::regex::Regex::new($re).unwrap())
+        static RE: ::std::sync::LazyLock<::regex::Regex> =
+            ::std::sync::LazyLock::new(|| ::regex::Regex::new($re).unwrap());
+        &*RE
     }};
 }
 
@@ -124,6 +125,40 @@ pub fn git_diff<S: AsRef<OsStr>>(base_commit: &str, extra_arg: S) -> Option<Stri
     Some(String::from_utf8_lossy(&output.stdout).into())
 }
 
+/// Returns true if any modified file matches the predicate, if we are in CI, or if unable to list modified files.
+pub fn files_modified(ci_info: &CiInfo, pred: impl Fn(&str) -> bool) -> bool {
+    if CiEnv::is_ci() {
+        // assume everything is modified on CI because we really don't want false positives there.
+        return true;
+    }
+    let Some(base_commit) = &ci_info.base_commit else {
+        eprintln!("No base commit, assuming all files are modified");
+        return true;
+    };
+    match crate::git_diff(base_commit, "--name-status") {
+        Some(output) => {
+            let modified_files = output.lines().filter_map(|ln| {
+                let (status, name) = ln
+                    .trim_end()
+                    .split_once('\t')
+                    .expect("bad format from `git diff --name-status`");
+                if status == "M" { Some(name) } else { None }
+            });
+            for modified_file in modified_files {
+                if pred(modified_file) {
+                    return true;
+                }
+            }
+            false
+        }
+        None => {
+            eprintln!("warning: failed to run `git diff` to check for changes");
+            eprintln!("warning: assuming all files are modified");
+            true
+        }
+    }
+}
+
 pub mod alphabetical;
 pub mod bins;
 pub mod debug_artifacts;
@@ -133,6 +168,7 @@ pub mod error_codes;
 pub mod ext_tool_checks;
 pub mod extdeps;
 pub mod features;
+pub mod filenames;
 pub mod fluent_alphabetical;
 pub mod fluent_period;
 mod fluent_used;
@@ -143,7 +179,6 @@ pub mod mir_opt_tests;
 pub mod pal;
 pub mod rustdoc_css_themes;
 pub mod rustdoc_gui_tests;
-pub mod rustdoc_js;
 pub mod rustdoc_json;
 pub mod rustdoc_templates;
 pub mod style;
diff --git a/src/tools/tidy/src/main.rs b/src/tools/tidy/src/main.rs
index ef6ff5c9277..13b20f33bd0 100644
--- a/src/tools/tidy/src/main.rs
+++ b/src/tools/tidy/src/main.rs
@@ -15,11 +15,12 @@ use std::{env, process};
 use tidy::*;
 
 fn main() {
-    // Running Cargo will read the libstd Cargo.toml
+    // Enable nightly, because Cargo will read the libstd Cargo.toml
     // which uses the unstable `public-dependency` feature.
-    //
-    // `setenv` might not be thread safe, so run it before using multiple threads.
-    env::set_var("RUSTC_BOOTSTRAP", "1");
+    // SAFETY: no other threads have been spawned
+    unsafe {
+        env::set_var("RUSTC_BOOTSTRAP", "1");
+    }
 
     let root_path: PathBuf = env::args_os().nth(1).expect("need path to root of repo").into();
     let cargo: PathBuf = env::args_os().nth(2).expect("need path to cargo").into();
@@ -111,7 +112,6 @@ fn main() {
         check!(rustdoc_gui_tests, &tests_path);
         check!(rustdoc_css_themes, &librustdoc_path);
         check!(rustdoc_templates, &librustdoc_path);
-        check!(rustdoc_js, &librustdoc_path, &tools_path, &src_path);
         check!(rustdoc_json, &src_path, &ci_info);
         check!(known_bug, &crashes_path);
         check!(unknown_revision, &tests_path);
@@ -154,6 +154,8 @@ fn main() {
 
         check!(triagebot, &root_path);
 
+        check!(filenames, &root_path);
+
         let collected = {
             drain_handles(&mut handles);
 
@@ -173,7 +175,17 @@ fn main() {
         };
         check!(unstable_book, &src_path, collected);
 
-        check!(ext_tool_checks, &root_path, &output_directory, bless, extra_checks, pos_args);
+        check!(
+            ext_tool_checks,
+            &root_path,
+            &output_directory,
+            &ci_info,
+            &librustdoc_path,
+            &tools_path,
+            bless,
+            extra_checks,
+            pos_args
+        );
     });
 
     if bad.load(Ordering::Relaxed) {
diff --git a/src/tools/tidy/src/mir_opt_tests.rs b/src/tools/tidy/src/mir_opt_tests.rs
index bb0d8150be4..6119eb58383 100644
--- a/src/tools/tidy/src/mir_opt_tests.rs
+++ b/src/tools/tidy/src/mir_opt_tests.rs
@@ -49,28 +49,27 @@ fn check_unused_files(path: &Path, bless: bool, bad: &mut bool) {
 }
 
 fn check_dash_files(path: &Path, bless: bool, bad: &mut bool) {
-    for file in walkdir::WalkDir::new(&path.join("mir-opt"))
+    for file in walkdir::WalkDir::new(path.join("mir-opt"))
         .into_iter()
         .filter_map(Result::ok)
         .filter(|e| e.file_type().is_file())
     {
         let path = file.path();
-        if path.extension() == Some("rs".as_ref()) {
-            if let Some(name) = path.file_name().and_then(|s| s.to_str()) {
-                if name.contains('-') {
-                    if !bless {
-                        tidy_error!(
-                            bad,
-                            "mir-opt test files should not have dashes in them: {}",
-                            path.display()
-                        );
-                    } else {
-                        let new_name = name.replace('-', "_");
-                        let mut new_path = path.to_owned();
-                        new_path.set_file_name(new_name);
-                        let _ = std::fs::rename(path, new_path);
-                    }
-                }
+        if path.extension() == Some("rs".as_ref())
+            && let Some(name) = path.file_name().and_then(|s| s.to_str())
+            && name.contains('-')
+        {
+            if !bless {
+                tidy_error!(
+                    bad,
+                    "mir-opt test files should not have dashes in them: {}",
+                    path.display()
+                );
+            } else {
+                let new_name = name.replace('-', "_");
+                let mut new_path = path.to_owned();
+                new_path.set_file_name(new_name);
+                let _ = std::fs::rename(path, new_path);
             }
         }
     }
diff --git a/src/tools/tidy/src/pal.rs b/src/tools/tidy/src/pal.rs
index 9b915e0f737..5b8b44429bb 100644
--- a/src/tools/tidy/src/pal.rs
+++ b/src/tools/tidy/src/pal.rs
@@ -37,6 +37,7 @@ use crate::walk::{filter_dirs, walk};
 // Paths that may contain platform-specific code.
 const EXCEPTION_PATHS: &[&str] = &[
     "library/compiler-builtins",
+    "library/std_detect",
     "library/windows_targets",
     "library/panic_abort",
     "library/panic_unwind",
@@ -86,7 +87,7 @@ pub fn check(path: &Path, bad: &mut bool) {
             return;
         }
 
-        check_cfgs(contents, &file, bad, &mut saw_target_arch, &mut saw_cfg_bang);
+        check_cfgs(contents, file, bad, &mut saw_target_arch, &mut saw_cfg_bang);
     });
 
     assert!(saw_target_arch);
diff --git a/src/tools/tidy/src/rustdoc_gui_tests.rs b/src/tools/tidy/src/rustdoc_gui_tests.rs
index 91776bc989e..3b995f219d2 100644
--- a/src/tools/tidy/src/rustdoc_gui_tests.rs
+++ b/src/tools/tidy/src/rustdoc_gui_tests.rs
@@ -5,7 +5,7 @@ use std::path::Path;
 pub fn check(path: &Path, bad: &mut bool) {
     crate::walk::walk(
         &path.join("rustdoc-gui"),
-        |p, is_dir| !is_dir && p.extension().map_or(true, |e| e != "goml"),
+        |p, is_dir| !is_dir && p.extension().is_none_or(|e| e != "goml"),
         &mut |entry, content| {
             for line in content.lines() {
                 if !line.starts_with("// ") {
diff --git a/src/tools/tidy/src/rustdoc_js.rs b/src/tools/tidy/src/rustdoc_js.rs
deleted file mode 100644
index 5e924544f0d..00000000000
--- a/src/tools/tidy/src/rustdoc_js.rs
+++ /dev/null
@@ -1,101 +0,0 @@
-//! Tidy check to ensure that rustdoc templates didn't forget a `{# #}` to strip extra whitespace
-//! characters.
-
-use std::ffi::OsStr;
-use std::path::{Path, PathBuf};
-use std::process::Command;
-
-use ignore::DirEntry;
-
-use crate::walk::walk_no_read;
-
-fn run_eslint(args: &[PathBuf], config_folder: PathBuf, bad: &mut bool) {
-    let mut child = match Command::new("npx")
-        .arg("eslint")
-        .arg("-c")
-        .arg(config_folder.join(".eslintrc.js"))
-        .args(args)
-        .spawn()
-    {
-        Ok(child) => child,
-        Err(error) => {
-            *bad = true;
-            eprintln!("failed to run eslint: {error:?}");
-            return;
-        }
-    };
-    match child.wait() {
-        Ok(exit_status) => {
-            if exit_status.success() {
-                return;
-            }
-            eprintln!("eslint command failed");
-        }
-        Err(error) => eprintln!("eslint command failed: {error:?}"),
-    }
-    *bad = true;
-}
-
-fn get_eslint_version_inner(global: bool) -> Option<String> {
-    let mut command = Command::new("npm");
-    command.arg("list").arg("--parseable").arg("--long").arg("--depth=0");
-    if global {
-        command.arg("--global");
-    }
-    let output = command.output().ok()?;
-    let lines = String::from_utf8_lossy(&output.stdout);
-    lines.lines().find_map(|l| l.split(':').nth(1)?.strip_prefix("eslint@")).map(|v| v.to_owned())
-}
-
-fn get_eslint_version() -> Option<String> {
-    get_eslint_version_inner(false).or_else(|| get_eslint_version_inner(true))
-}
-
-pub fn check(librustdoc_path: &Path, tools_path: &Path, src_path: &Path, bad: &mut bool) {
-    let eslint_version_path = src_path.join("ci/docker/host-x86_64/tidy/eslint.version");
-    let eslint_version = match std::fs::read_to_string(&eslint_version_path) {
-        Ok(version) => version.trim().to_string(),
-        Err(error) => {
-            *bad = true;
-            eprintln!("failed to read `{}`: {error:?}", eslint_version_path.display());
-            return;
-        }
-    };
-    // Having the correct `eslint` version installed via `npm` isn't strictly necessary, since we're invoking it via `npx`,
-    // but this check allows the vast majority that is not working on the rustdoc frontend to avoid the penalty of running
-    // `eslint` in tidy. See also: https://github.com/rust-lang/rust/pull/142851
-    match get_eslint_version() {
-        Some(version) => {
-            if version != eslint_version {
-                *bad = true;
-                eprintln!(
-                    "⚠️ Installed version of eslint (`{version}`) is different than the \
-                     one used in the CI (`{eslint_version}`)",
-                );
-                eprintln!(
-                    "You can install this version using `npm update eslint` or by using \
-                     `npm install eslint@{eslint_version}`",
-                );
-                return;
-            }
-        }
-        None => {
-            eprintln!("`eslint` doesn't seem to be installed. Skipping tidy check for JS files.");
-            eprintln!("You can install it using `npm install eslint@{eslint_version}`");
-            return;
-        }
-    }
-    let mut files_to_check = Vec::new();
-    walk_no_read(
-        &[&librustdoc_path.join("html/static/js")],
-        |path, is_dir| is_dir || !path.extension().is_some_and(|ext| ext == OsStr::new("js")),
-        &mut |path: &DirEntry| {
-            files_to_check.push(path.path().into());
-        },
-    );
-    println!("Running eslint on rustdoc JS files");
-    run_eslint(&files_to_check, librustdoc_path.join("html/static"), bad);
-
-    run_eslint(&[tools_path.join("rustdoc-js/tester.js")], tools_path.join("rustdoc-js"), bad);
-    run_eslint(&[tools_path.join("rustdoc-gui/tester.js")], tools_path.join("rustdoc-gui"), bad);
-}
diff --git a/src/tools/tidy/src/rustdoc_json.rs b/src/tools/tidy/src/rustdoc_json.rs
index dfbb35d69f1..722e1ebd0ca 100644
--- a/src/tools/tidy/src/rustdoc_json.rs
+++ b/src/tools/tidy/src/rustdoc_json.rs
@@ -14,25 +14,13 @@ pub fn check(src_path: &Path, ci_info: &crate::CiInfo, bad: &mut bool) {
     };
 
     // First we check that `src/rustdoc-json-types` was modified.
-    match crate::git_diff(&base_commit, "--name-status") {
-        Some(output) => {
-            if !output
-                .lines()
-                .any(|line| line.starts_with("M") && line.contains(RUSTDOC_JSON_TYPES))
-            {
-                // `rustdoc-json-types` was not modified so nothing more to check here.
-                println!("`rustdoc-json-types` was not modified.");
-                return;
-            }
-        }
-        None => {
-            *bad = true;
-            eprintln!("error: failed to run `git diff` in rustdoc_json check");
-            return;
-        }
+    if !crate::files_modified(ci_info, |p| p == RUSTDOC_JSON_TYPES) {
+        // `rustdoc-json-types` was not modified so nothing more to check here.
+        println!("`rustdoc-json-types` was not modified.");
+        return;
     }
     // Then we check that if `FORMAT_VERSION` was updated, the `Latest feature:` was also updated.
-    match crate::git_diff(&base_commit, src_path.join("rustdoc-json-types")) {
+    match crate::git_diff(base_commit, src_path.join("rustdoc-json-types")) {
         Some(output) => {
             let mut format_version_updated = false;
             let mut latest_feature_comment_updated = false;
diff --git a/src/tools/tidy/src/rustdoc_templates.rs b/src/tools/tidy/src/rustdoc_templates.rs
index 2173dbf7e74..597290a6a9a 100644
--- a/src/tools/tidy/src/rustdoc_templates.rs
+++ b/src/tools/tidy/src/rustdoc_templates.rs
@@ -14,7 +14,7 @@ const TAGS: &[(&str, &str)] = &[("{#", "#}"), ("{%", "%}"), ("{{", "}}")];
 pub fn check(librustdoc_path: &Path, bad: &mut bool) {
     walk(
         &librustdoc_path.join("html/templates"),
-        |path, is_dir| is_dir || !path.extension().is_some_and(|ext| ext == OsStr::new("html")),
+        |path, is_dir| is_dir || path.extension().is_none_or(|ext| ext != OsStr::new("html")),
         &mut |path: &DirEntry, file_content: &str| {
             let mut lines = file_content.lines().enumerate().peekable();
 
@@ -23,10 +23,10 @@ pub fn check(librustdoc_path: &Path, bad: &mut bool) {
                 if let Some(need_next_line_check) = TAGS.iter().find_map(|(tag, end_tag)| {
                     // We first check if the line ends with a jinja tag.
                     if !line.ends_with(end_tag) {
-                        return None;
+                        None
                     // Then we check if this a comment tag.
                     } else if *tag != "{#" {
-                        return Some(false);
+                        Some(false)
                     // And finally we check if the comment is empty (ie, only there to strip
                     // extra whitespace characters).
                     } else if let Some(start_pos) = line.rfind(tag) {
diff --git a/src/tools/tidy/src/style.rs b/src/tools/tidy/src/style.rs
index 2237eac200d..35ed61eacc7 100644
--- a/src/tools/tidy/src/style.rs
+++ b/src/tools/tidy/src/style.rs
@@ -94,10 +94,9 @@ fn generate_problems<'a>(
     letter_digit: &'a FxHashMap<char, char>,
 ) -> impl Iterator<Item = u32> + 'a {
     consts.iter().flat_map(move |const_value| {
-        let problem =
-            letter_digit.iter().fold(format!("{:X}", const_value), |acc, (key, value)| {
-                acc.replace(&value.to_string(), &key.to_string())
-            });
+        let problem = letter_digit.iter().fold(format!("{const_value:X}"), |acc, (key, value)| {
+            acc.replace(&value.to_string(), &key.to_string())
+        });
         let indexes: Vec<usize> = problem
             .chars()
             .enumerate()
@@ -341,7 +340,7 @@ fn is_unexplained_ignore(extension: &str, line: &str) -> bool {
 
 pub fn check(path: &Path, bad: &mut bool) {
     fn skip(path: &Path, is_dir: bool) -> bool {
-        if path.file_name().map_or(false, |name| name.to_string_lossy().starts_with(".#")) {
+        if path.file_name().is_some_and(|name| name.to_string_lossy().starts_with(".#")) {
             // vim or emacs temporary file
             return true;
         }
@@ -358,12 +357,12 @@ pub fn check(path: &Path, bad: &mut bool) {
         let extensions = ["rs", "py", "js", "sh", "c", "cpp", "h", "md", "css", "ftl", "goml"];
 
         // NB: don't skip paths without extensions (or else we'll skip all directories and will only check top level files)
-        if path.extension().map_or(true, |ext| !extensions.iter().any(|e| ext == OsStr::new(e))) {
+        if path.extension().is_none_or(|ext| !extensions.iter().any(|e| ext == OsStr::new(e))) {
             return true;
         }
 
         // We only check CSS files in rustdoc.
-        path.extension().map_or(false, |e| e == "css") && !is_in(path, "src", "librustdoc")
+        path.extension().is_some_and(|e| e == "css") && !is_in(path, "src", "librustdoc")
     }
 
     // This creates a RegexSet as regex contains performance optimizations to be able to deal with these over
@@ -418,10 +417,10 @@ pub fn check(path: &Path, bad: &mut bool) {
             return;
         }
         // Shell completions are automatically generated
-        if let Some(p) = file.parent() {
-            if p.ends_with(Path::new("src/etc/completions")) {
-                return;
-            }
+        if let Some(p) = file.parent()
+            && p.ends_with(Path::new("src/etc/completions"))
+        {
+            return;
         }
         let [
             mut skip_cr,
@@ -435,7 +434,7 @@ pub fn check(path: &Path, bad: &mut bool) {
             mut skip_copyright,
             mut skip_dbg,
             mut skip_odd_backticks,
-        ] = contains_ignore_directives(&path_str, can_contain, &contents, CONFIGURABLE_CHECKS);
+        ] = contains_ignore_directives(&path_str, can_contain, contents, CONFIGURABLE_CHECKS);
         let mut leading_new_lines = false;
         let mut trailing_new_lines = 0;
         let mut lines = 0;
@@ -605,25 +604,25 @@ pub fn check(path: &Path, bad: &mut bool) {
                         backtick_count += comment_text.chars().filter(|ch| *ch == '`').count();
                     }
                     comment_block = Some((start_line, backtick_count));
-                } else if let Some((start_line, backtick_count)) = comment_block.take() {
-                    if backtick_count % 2 == 1 {
-                        let mut err = |msg: &str| {
-                            tidy_error!(bad, "{}:{start_line}: {msg}", file.display());
-                        };
-                        let block_len = (i + 1) - start_line;
-                        if block_len == 1 {
-                            suppressible_tidy_err!(
-                                err,
-                                skip_odd_backticks,
-                                "comment with odd number of backticks"
-                            );
-                        } else {
-                            suppressible_tidy_err!(
-                                err,
-                                skip_odd_backticks,
-                                "{block_len}-line comment block with odd number of backticks"
-                            );
-                        }
+                } else if let Some((start_line, backtick_count)) = comment_block.take()
+                    && backtick_count % 2 == 1
+                {
+                    let mut err = |msg: &str| {
+                        tidy_error!(bad, "{}:{start_line}: {msg}", file.display());
+                    };
+                    let block_len = (i + 1) - start_line;
+                    if block_len == 1 {
+                        suppressible_tidy_err!(
+                            err,
+                            skip_odd_backticks,
+                            "comment with odd number of backticks"
+                        );
+                    } else {
+                        suppressible_tidy_err!(
+                            err,
+                            skip_odd_backticks,
+                            "{block_len}-line comment block with odd number of backticks"
+                        );
                     }
                 }
             }
diff --git a/src/tools/tidy/src/target_policy.rs b/src/tools/tidy/src/target_policy.rs
index 776221d3062..550932dbfdc 100644
--- a/src/tools/tidy/src/target_policy.rs
+++ b/src/tools/tidy/src/target_policy.rs
@@ -8,7 +8,7 @@ use std::path::Path;
 use crate::walk::{filter_not_rust, walk};
 
 const TARGET_DEFINITIONS_PATH: &str = "compiler/rustc_target/src/spec/targets/";
-const ASSEMBLY_TEST_PATH: &str = "tests/assembly/targets/";
+const ASSEMBLY_LLVM_TEST_PATH: &str = "tests/assembly-llvm/targets/";
 const REVISION_LINE_START: &str = "//@ revisions: ";
 const EXCEPTIONS: &[&str] = &[
     // FIXME: disabled since it fails on CI saying the csky component is missing
@@ -43,7 +43,7 @@ pub fn check(root_path: &Path, bad: &mut bool) {
         let _ = targets_to_find.insert(target_name);
     }
 
-    walk(&root_path.join(ASSEMBLY_TEST_PATH), |_, _| false, &mut |_, contents| {
+    walk(&root_path.join(ASSEMBLY_LLVM_TEST_PATH), |_, _| false, &mut |_, contents| {
         for line in contents.lines() {
             let Some(_) = line.find(REVISION_LINE_START) else {
                 continue;
@@ -55,7 +55,7 @@ pub fn check(root_path: &Path, bad: &mut bool) {
 
     for target in targets_to_find {
         if !EXCEPTIONS.contains(&target.as_str()) {
-            tidy_error!(bad, "{ASSEMBLY_TEST_PATH}: missing assembly test for {target}")
+            tidy_error!(bad, "{ASSEMBLY_LLVM_TEST_PATH}: missing assembly test for {target}")
         }
     }
 }
diff --git a/src/tools/tidy/src/target_specific_tests.rs b/src/tools/tidy/src/target_specific_tests.rs
index a66ccd37070..f4a6783abb6 100644
--- a/src/tools/tidy/src/target_specific_tests.rs
+++ b/src/tools/tidy/src/target_specific_tests.rs
@@ -30,18 +30,17 @@ pub fn check(tests_path: &Path, bad: &mut bool) {
                         comp_vec.push(component);
                     }
                 }
-            } else if directive.starts_with(COMPILE_FLAGS_HEADER) {
-                let compile_flags = &directive[COMPILE_FLAGS_HEADER.len()..];
-                if let Some((_, v)) = compile_flags.split_once("--target") {
-                    let v = v.trim_start_matches(|c| c == ' ' || c == '=');
-                    let v = if v == "{{target}}" { Some((v, v)) } else { v.split_once("-") };
-                    if let Some((arch, _)) = v {
-                        let info = header_map.entry(revision).or_insert(RevisionInfo::default());
-                        info.target_arch.replace(arch);
-                    } else {
-                        eprintln!("{file}: seems to have a malformed --target value");
-                        *bad = true;
-                    }
+            } else if let Some(compile_flags) = directive.strip_prefix(COMPILE_FLAGS_HEADER)
+                && let Some((_, v)) = compile_flags.split_once("--target")
+            {
+                let v = v.trim_start_matches([' ', '=']);
+                let v = if v == "{{target}}" { Some((v, v)) } else { v.split_once("-") };
+                if let Some((arch, _)) = v {
+                    let info = header_map.entry(revision).or_insert(RevisionInfo::default());
+                    info.target_arch.replace(arch);
+                } else {
+                    eprintln!("{file}: seems to have a malformed --target value");
+                    *bad = true;
                 }
             }
         });
@@ -57,15 +56,13 @@ pub fn check(tests_path: &Path, bad: &mut bool) {
                 (None, None) => {}
                 (Some(_), None) => {
                     eprintln!(
-                        "{}: revision {} should specify `{}` as it has `--target` set",
-                        file, rev, LLVM_COMPONENTS_HEADER
+                        "{file}: revision {rev} should specify `{LLVM_COMPONENTS_HEADER}` as it has `--target` set"
                     );
                     *bad = true;
                 }
                 (None, Some(_)) => {
                     eprintln!(
-                        "{}: revision {} should not specify `{}` as it doesn't need `--target`",
-                        file, rev, LLVM_COMPONENTS_HEADER
+                        "{file}: revision {rev} should not specify `{LLVM_COMPONENTS_HEADER}` as it doesn't need `--target`"
                     );
                     *bad = true;
                 }
diff --git a/src/tools/tidy/src/tests_revision_unpaired_stdout_stderr.rs b/src/tools/tidy/src/tests_revision_unpaired_stdout_stderr.rs
index ee92d302db3..02412b6f190 100644
--- a/src/tools/tidy/src/tests_revision_unpaired_stdout_stderr.rs
+++ b/src/tools/tidy/src/tests_revision_unpaired_stdout_stderr.rs
@@ -38,7 +38,7 @@ pub fn check(tests_path: impl AsRef<Path>, bad: &mut bool) {
 
             let sibling_path = sibling.path();
 
-            let Some(ext) = sibling_path.extension().map(OsStr::to_str).flatten() else {
+            let Some(ext) = sibling_path.extension().and_then(OsStr::to_str) else {
                 continue;
             };
 
@@ -84,7 +84,7 @@ pub fn check(tests_path: impl AsRef<Path>, bad: &mut bool) {
                 }
             });
 
-            let Some(test_name) = test.file_stem().map(OsStr::to_str).flatten() else {
+            let Some(test_name) = test.file_stem().and_then(OsStr::to_str) else {
                 continue;
             };
 
@@ -102,9 +102,9 @@ pub fn check(tests_path: impl AsRef<Path>, bad: &mut bool) {
         // of the form: `test-name.revision.compare_mode.extension`, but our only concern is
         // `test-name.revision` and `extension`.
         for sibling in files_under_inspection.iter().filter(|f| {
-            f.extension().map(OsStr::to_str).flatten().is_some_and(|ext| EXTENSIONS.contains(&ext))
+            f.extension().and_then(OsStr::to_str).is_some_and(|ext| EXTENSIONS.contains(&ext))
         }) {
-            let Some(filename) = sibling.file_name().map(OsStr::to_str).flatten() else {
+            let Some(filename) = sibling.file_name().and_then(OsStr::to_str) else {
                 continue;
             };
 
@@ -131,10 +131,10 @@ pub fn check(tests_path: impl AsRef<Path>, bad: &mut bool) {
                 }
                 [_, _] => return,
                 [_, found_revision, .., extension] => {
-                    if !IGNORES.contains(&found_revision)
+                    if !IGNORES.contains(found_revision)
                         && !expected_revisions.contains(*found_revision)
                         // This is from `//@ stderr-per-bitwidth`
-                        && !(*extension == "stderr" && ["32bit", "64bit"].contains(&found_revision))
+                        && !(*extension == "stderr" && ["32bit", "64bit"].contains(found_revision))
                     {
                         // Found some unexpected revision-esque component that is not a known
                         // compare-mode or expected revision.
diff --git a/src/tools/tidy/src/ui_tests.rs b/src/tools/tidy/src/ui_tests.rs
index 53226fcb80e..b9d22ece597 100644
--- a/src/tools/tidy/src/ui_tests.rs
+++ b/src/tools/tidy/src/ui_tests.rs
@@ -17,7 +17,7 @@ use ignore::Walk;
 const ENTRY_LIMIT: u32 = 901;
 // FIXME: The following limits should be reduced eventually.
 
-const ISSUES_ENTRY_LIMIT: u32 = 1619;
+const ISSUES_ENTRY_LIMIT: u32 = 1616;
 
 const EXPECTED_TEST_FILE_EXTENSIONS: &[&str] = &[
     "rs",     // test source files
@@ -57,11 +57,9 @@ const EXTENSION_EXCEPTION_PATHS: &[&str] = &[
 fn check_entries(tests_path: &Path, bad: &mut bool) {
     let mut directories: HashMap<PathBuf, u32> = HashMap::new();
 
-    for dir in Walk::new(&tests_path.join("ui")) {
-        if let Ok(entry) = dir {
-            let parent = entry.path().parent().unwrap().to_path_buf();
-            *directories.entry(parent).or_default() += 1;
-        }
+    for entry in Walk::new(tests_path.join("ui")).flatten() {
+        let parent = entry.path().parent().unwrap().to_path_buf();
+        *directories.entry(parent).or_default() += 1;
     }
 
     let (mut max, mut max_issues) = (0, 0);
@@ -99,7 +97,7 @@ pub fn check(root_path: &Path, bless: bool, bad: &mut bool) {
 "#;
 
     let path = &root_path.join("tests");
-    check_entries(&path, bad);
+    check_entries(path, bad);
 
     // the list of files in ui tests that are allowed to start with `issue-XXXX`
     // BTreeSet because we would like a stable ordering so --bless works
@@ -109,13 +107,12 @@ pub fn check(root_path: &Path, bless: bool, bad: &mut bool) {
         .strip_prefix(issues_txt_header)
         .unwrap()
         .lines()
-        .map(|line| {
+        .inspect(|&line| {
             if prev_line > line {
                 is_sorted = false;
             }
 
             prev_line = line;
-            line
         })
         .collect();
 
@@ -164,31 +161,30 @@ pub fn check(root_path: &Path, bless: bool, bad: &mut bool) {
                     tidy_error!(bad, "Stray file with UI testing output: {:?}", file_path);
                 }
 
-                if let Ok(metadata) = fs::metadata(file_path) {
-                    if metadata.len() == 0 {
-                        tidy_error!(bad, "Empty file with UI testing output: {:?}", file_path);
-                    }
+                if let Ok(metadata) = fs::metadata(file_path)
+                    && metadata.len() == 0
+                {
+                    tidy_error!(bad, "Empty file with UI testing output: {:?}", file_path);
                 }
             }
 
-            if ext == "rs" {
-                if let Some(test_name) = static_regex!(r"^issues?[-_]?(\d{3,})").captures(testname)
-                {
-                    // these paths are always relative to the passed `path` and always UTF8
-                    let stripped_path = file_path
-                        .strip_prefix(path)
-                        .unwrap()
-                        .to_str()
-                        .unwrap()
-                        .replace(std::path::MAIN_SEPARATOR_STR, "/");
-
-                    if !remaining_issue_names.remove(stripped_path.as_str()) {
-                        tidy_error!(
-                            bad,
-                            "file `tests/{stripped_path}` must begin with a descriptive name, consider `{{reason}}-issue-{issue_n}.rs`",
-                            issue_n = &test_name[1],
-                        );
-                    }
+            if ext == "rs"
+                && let Some(test_name) = static_regex!(r"^issues?[-_]?(\d{3,})").captures(testname)
+            {
+                // these paths are always relative to the passed `path` and always UTF8
+                let stripped_path = file_path
+                    .strip_prefix(path)
+                    .unwrap()
+                    .to_str()
+                    .unwrap()
+                    .replace(std::path::MAIN_SEPARATOR_STR, "/");
+
+                if !remaining_issue_names.remove(stripped_path.as_str()) {
+                    tidy_error!(
+                        bad,
+                        "file `tests/{stripped_path}` must begin with a descriptive name, consider `{{reason}}-issue-{issue_n}.rs`",
+                        issue_n = &test_name[1],
+                    );
                 }
             }
         }
@@ -203,7 +199,7 @@ pub fn check(root_path: &Path, bless: bool, bad: &mut bool) {
         // so we don't bork things on panic or a contributor using Ctrl+C
         let blessed_issues_path = tidy_src.join("issues_blessed.txt");
         let mut blessed_issues_txt = fs::File::create(&blessed_issues_path).unwrap();
-        blessed_issues_txt.write(issues_txt_header.as_bytes()).unwrap();
+        blessed_issues_txt.write_all(issues_txt_header.as_bytes()).unwrap();
         // If we changed paths to use the OS separator, reassert Unix chauvinism for blessing.
         for filename in allowed_issue_names.difference(&remaining_issue_names) {
             writeln!(blessed_issues_txt, "{filename}").unwrap();
diff --git a/src/tools/tidy/src/unit_tests.rs b/src/tools/tidy/src/unit_tests.rs
index 90ef36d5882..df9146b5147 100644
--- a/src/tools/tidy/src/unit_tests.rs
+++ b/src/tools/tidy/src/unit_tests.rs
@@ -56,7 +56,8 @@ pub fn check(root_path: &Path, bad: &mut bool) {
             let line = line.trim();
             let is_test = || line.contains("#[test]") && !line.contains("`#[test]");
             let is_bench = || line.contains("#[bench]") && !line.contains("`#[bench]");
-            if !line.starts_with("//") && (is_test() || is_bench()) {
+            let manual_skip = line.contains("//tidy:skip");
+            if !line.starts_with("//") && (is_test() || is_bench()) && !manual_skip {
                 let explanation = if is_core {
                     "`core` unit tests and benchmarks must be placed into `coretests`"
                 } else if is_alloc {
diff --git a/src/tools/tidy/src/unstable_book.rs b/src/tools/tidy/src/unstable_book.rs
index a2453a6c960..9dc9d42d466 100644
--- a/src/tools/tidy/src/unstable_book.rs
+++ b/src/tools/tidy/src/unstable_book.rs
@@ -38,7 +38,7 @@ fn dir_entry_is_file(dir_entry: &fs::DirEntry) -> bool {
 pub fn collect_unstable_feature_names(features: &Features) -> BTreeSet<String> {
     features
         .iter()
-        .filter(|&(_, ref f)| f.level == Status::Unstable)
+        .filter(|&(_, f)| f.level == Status::Unstable)
         .map(|(name, _)| name.replace('_', "-"))
         .collect()
 }
@@ -90,7 +90,7 @@ pub fn check(path: &Path, features: CollectedFeatures, bad: &mut bool) {
     let lib_features = features
         .lib
         .into_iter()
-        .filter(|&(ref name, _)| !lang_features.contains_key(name))
+        .filter(|(name, _)| !lang_features.contains_key(name))
         .collect::<Features>();
 
     // Library features
diff --git a/src/tools/tidy/src/walk.rs b/src/tools/tidy/src/walk.rs
index c2c9eb8d250..7825ebeb5ba 100644
--- a/src/tools/tidy/src/walk.rs
+++ b/src/tools/tidy/src/walk.rs
@@ -66,7 +66,7 @@ pub fn walk_many(
             Ok(s) => s,
             Err(_) => return, // skip this file
         };
-        f(&entry, &contents_str);
+        f(entry, contents_str);
     });
 }
 
@@ -83,7 +83,7 @@ pub(crate) fn walk_no_read(
         !skip(e.path(), e.file_type().map(|ft| ft.is_dir()).unwrap_or(false))
     });
     for entry in walker.build().flatten() {
-        if entry.file_type().map_or(true, |kind| kind.is_dir() || kind.is_symlink()) {
+        if entry.file_type().is_none_or(|kind| kind.is_dir() || kind.is_symlink()) {
             continue;
         }
         f(&entry);
diff --git a/src/tools/tidy/src/x_version.rs b/src/tools/tidy/src/x_version.rs
index 489343561e1..9f7f43c4000 100644
--- a/src/tools/tidy/src/x_version.rs
+++ b/src/tools/tidy/src/x_version.rs
@@ -25,12 +25,12 @@ pub fn check(root: &Path, cargo: &Path, bad: &mut bool) {
                 if let Some(version) = iter.next() {
                     // Check this is the rust-lang/rust x tool installation since it should be
                     // installed at a path containing `src/tools/x`.
-                    if let Some(path) = iter.next() {
-                        if path.contains(&"src/tools/x") {
-                            let version = version.strip_prefix("v").unwrap();
-                            installed = Some(Version::parse(version).unwrap());
-                            break;
-                        }
+                    if let Some(path) = iter.next()
+                        && path.contains("src/tools/x")
+                    {
+                        let version = version.strip_prefix("v").unwrap();
+                        installed = Some(Version::parse(version).unwrap());
+                        break;
                     };
                 }
             } else {
@@ -42,15 +42,15 @@ pub fn check(root: &Path, cargo: &Path, bad: &mut bool) {
 
         if let Some(expected) = get_x_wrapper_version(root, cargo) {
             if installed < expected {
-                return println!(
+                println!(
                     "Current version of x is {installed}, but the latest version is {expected}\nConsider updating to the newer version of x by running `cargo install --path src/tools/x`"
-                );
+                )
             }
         } else {
-            return tidy_error!(
+            tidy_error!(
                 bad,
                 "Unable to parse the latest version of `x` at `src/tools/x/Cargo.toml`"
-            );
+            )
         }
     } else {
         tidy_error!(bad, "failed to check version of `x`: {}", cargo_list.status)
diff --git a/src/tools/tier-check/Cargo.toml b/src/tools/tier-check/Cargo.toml
index 3f08165a3fc..a34f9447fab 100644
--- a/src/tools/tier-check/Cargo.toml
+++ b/src/tools/tier-check/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "tier-check"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
diff --git a/src/tools/tier-check/src/main.rs b/src/tools/tier-check/src/main.rs
index 91b96117db0..6c27a2ec442 100644
--- a/src/tools/tier-check/src/main.rs
+++ b/src/tools/tier-check/src/main.rs
@@ -25,29 +25,27 @@ fn main() {
     let doc_targets: HashSet<_> = doc_targets_md
         .lines()
         .filter(|line| line.starts_with(&['`', '['][..]) && line.contains('|'))
-        .map(|line| line.split('`').skip(1).next().expect("expected target code span"))
+        .map(|line| line.split('`').nth(1).expect("expected target code span"))
         .collect();
 
     let missing: Vec<_> = target_list.difference(&doc_targets).collect();
     let extra: Vec<_> = doc_targets.difference(&target_list).collect();
     for target in &missing {
         eprintln!(
-            "error: target `{}` is missing from {}\n\
-            If this is a new target, please add it to {}.",
-            target, filename, src
+            "error: target `{target}` is missing from {filename}\n\
+            If this is a new target, please add it to {src}."
         );
     }
     for target in &extra {
         eprintln!(
-            "error: target `{}` is in {}, but does not appear in the rustc target list\n\
-            If the target has been removed, please edit {} and remove the target.",
-            target, filename, src
+            "error: target `{target}` is in {filename}, but does not appear in the rustc target list\n\
+            If the target has been removed, please edit {src} and remove the target."
         );
     }
     // Check target names for unwanted characters like `.` that can cause problems e.g. in Cargo.
     // See also Tier 3 target policy.
     // If desired, target names can ignore this check.
-    let ignore_target_names = vec![
+    let ignore_target_names = [
         "thumbv8m.base-none-eabi",
         "thumbv8m.main-none-eabi",
         "thumbv8m.main-none-eabihf",
diff --git a/src/tools/unicode-table-generator/Cargo.toml b/src/tools/unicode-table-generator/Cargo.toml
index f8a500922d0..3ca6e9e316f 100644
--- a/src/tools/unicode-table-generator/Cargo.toml
+++ b/src/tools/unicode-table-generator/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "unicode-table-generator"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/src/tools/unicode-table-generator/src/cascading_map.rs b/src/tools/unicode-table-generator/src/cascading_map.rs
index 1eb35e819c0..78a7bba3208 100644
--- a/src/tools/unicode-table-generator/src/cascading_map.rs
+++ b/src/tools/unicode-table-generator/src/cascading_map.rs
@@ -21,7 +21,7 @@ impl RawEmitter {
 
         let points = ranges
             .iter()
-            .flat_map(|r| (r.start..r.end).into_iter().collect::<Vec<u32>>())
+            .flat_map(|r| (r.start..r.end).collect::<Vec<u32>>())
             .collect::<Vec<u32>>();
 
         println!("there are {} points", points.len());
@@ -32,21 +32,20 @@ impl RawEmitter {
             // assert that there is no whitespace over the 0x3000 range.
             assert!(point <= 0x3000, "the highest unicode whitespace value has changed");
             let high_bytes = point as usize >> 8;
-            let codepoints = codepoints_by_high_bytes.entry(high_bytes).or_insert_with(Vec::new);
+            let codepoints = codepoints_by_high_bytes.entry(high_bytes).or_default();
             codepoints.push(point);
         }
 
         let mut bit_for_high_byte = 1u8;
         let mut arms = Vec::<String>::new();
 
-        let mut high_bytes: Vec<usize> =
-            codepoints_by_high_bytes.keys().map(|k| k.clone()).collect();
+        let mut high_bytes: Vec<usize> = codepoints_by_high_bytes.keys().copied().collect();
         high_bytes.sort();
         for high_byte in high_bytes {
             let codepoints = codepoints_by_high_bytes.get_mut(&high_byte).unwrap();
             if codepoints.len() == 1 {
                 let ch = codepoints.pop().unwrap();
-                arms.push(format!("{} => c as u32 == {:#04x}", high_byte, ch));
+                arms.push(format!("{high_byte} => c as u32 == {ch:#04x}"));
                 continue;
             }
             // more than 1 codepoint in this arm
@@ -54,8 +53,7 @@ impl RawEmitter {
                 map[(*codepoint & 0xff) as usize] |= bit_for_high_byte;
             }
             arms.push(format!(
-                "{} => WHITESPACE_MAP[c as usize & 0xff] & {} != 0",
-                high_byte, bit_for_high_byte
+                "{high_byte} => WHITESPACE_MAP[c as usize & 0xff] & {bit_for_high_byte} != 0"
             ));
             bit_for_high_byte <<= 1;
         }
@@ -68,7 +66,7 @@ impl RawEmitter {
         writeln!(&mut self.file, "pub const fn lookup(c: char) -> bool {{").unwrap();
         writeln!(&mut self.file, "    match c as u32 >> 8 {{").unwrap();
         for arm in arms {
-            writeln!(&mut self.file, "        {},", arm).unwrap();
+            writeln!(&mut self.file, "        {arm},").unwrap();
         }
         writeln!(&mut self.file, "        _ => false,").unwrap();
         writeln!(&mut self.file, "    }}").unwrap();
diff --git a/src/tools/unicode-table-generator/src/case_mapping.rs b/src/tools/unicode-table-generator/src/case_mapping.rs
index 00241b7ee0e..9c6454492e7 100644
--- a/src/tools/unicode-table-generator/src/case_mapping.rs
+++ b/src/tools/unicode-table-generator/src/case_mapping.rs
@@ -9,7 +9,7 @@ const INDEX_MASK: u32 = 1 << 22;
 pub(crate) fn generate_case_mapping(data: &UnicodeData) -> String {
     let mut file = String::new();
 
-    write!(file, "const INDEX_MASK: u32 = 0x{:x};", INDEX_MASK).unwrap();
+    write!(file, "const INDEX_MASK: u32 = 0x{INDEX_MASK:x};").unwrap();
     file.push_str("\n\n");
     file.push_str(HEADER.trim_start());
     file.push('\n');
diff --git a/src/tools/unicode-table-generator/src/main.rs b/src/tools/unicode-table-generator/src/main.rs
index 415db2c4dbc..6cdb82a87bd 100644
--- a/src/tools/unicode-table-generator/src/main.rs
+++ b/src/tools/unicode-table-generator/src/main.rs
@@ -160,15 +160,15 @@ fn load_data() -> UnicodeData {
                 .push(Codepoints::Single(row.codepoint));
         }
 
-        if let Some(mapped) = row.simple_lowercase_mapping {
-            if mapped != row.codepoint {
-                to_lower.insert(row.codepoint.value(), (mapped.value(), 0, 0));
-            }
+        if let Some(mapped) = row.simple_lowercase_mapping
+            && mapped != row.codepoint
+        {
+            to_lower.insert(row.codepoint.value(), (mapped.value(), 0, 0));
         }
-        if let Some(mapped) = row.simple_uppercase_mapping {
-            if mapped != row.codepoint {
-                to_upper.insert(row.codepoint.value(), (mapped.value(), 0, 0));
-            }
+        if let Some(mapped) = row.simple_uppercase_mapping
+            && mapped != row.codepoint
+        {
+            to_upper.insert(row.codepoint.value(), (mapped.value(), 0, 0));
         }
     }
 
@@ -196,12 +196,12 @@ fn load_data() -> UnicodeData {
                     .flat_map(|codepoints| match codepoints {
                         Codepoints::Single(c) => c
                             .scalar()
-                            .map(|ch| (ch as u32..ch as u32 + 1))
+                            .map(|ch| ch as u32..ch as u32 + 1)
                             .into_iter()
                             .collect::<Vec<_>>(),
                         Codepoints::Range(c) => c
                             .into_iter()
-                            .flat_map(|c| c.scalar().map(|ch| (ch as u32..ch as u32 + 1)))
+                            .flat_map(|c| c.scalar().map(|ch| ch as u32..ch as u32 + 1))
                             .collect::<Vec<_>>(),
                     })
                     .collect::<Vec<Range<u32>>>(),
@@ -236,7 +236,7 @@ fn main() {
     let ranges_by_property = &unicode_data.ranges;
 
     if let Some(path) = test_path {
-        std::fs::write(&path, generate_tests(&write_location, &ranges_by_property)).unwrap();
+        std::fs::write(&path, generate_tests(&write_location, ranges_by_property)).unwrap();
     }
 
     let mut total_bytes = 0;
@@ -246,9 +246,9 @@ fn main() {
 
         let mut emitter = RawEmitter::new();
         if property == &"White_Space" {
-            emit_whitespace(&mut emitter, &ranges);
+            emit_whitespace(&mut emitter, ranges);
         } else {
-            emit_codepoints(&mut emitter, &ranges);
+            emit_codepoints(&mut emitter, ranges);
         }
 
         modules.push((property.to_lowercase().to_string(), emitter.file));
@@ -288,7 +288,7 @@ fn main() {
         for line in contents.lines() {
             if !line.trim().is_empty() {
                 table_file.push_str("    ");
-                table_file.push_str(&line);
+                table_file.push_str(line);
             }
             table_file.push('\n');
         }
@@ -312,7 +312,7 @@ fn version() -> String {
     let start = readme.find(prefix).unwrap() + prefix.len();
     let end = readme.find(" of the Unicode Standard.").unwrap();
     let version =
-        readme[start..end].split('.').map(|v| v.parse::<u32>().expect(&v)).collect::<Vec<_>>();
+        readme[start..end].split('.').map(|v| v.parse::<u32>().expect(v)).collect::<Vec<_>>();
     let [major, minor, micro] = [version[0], version[1], version[2]];
 
     out.push_str(&format!("({major}, {minor}, {micro});\n"));
@@ -320,7 +320,7 @@ fn version() -> String {
 }
 
 fn fmt_list<V: std::fmt::Debug>(values: impl IntoIterator<Item = V>) -> String {
-    let pieces = values.into_iter().map(|b| format!("{:?}, ", b)).collect::<Vec<_>>();
+    let pieces = values.into_iter().map(|b| format!("{b:?}, ")).collect::<Vec<_>>();
     let mut out = String::new();
     let mut line = String::from("\n    ");
     for piece in pieces {
@@ -348,7 +348,7 @@ fn generate_tests(data_path: &str, ranges: &[(&str, Vec<Range<u32>>)]) -> String
     s.push_str("\nfn main() {\n");
 
     for (property, ranges) in ranges {
-        s.push_str(&format!(r#"    println!("Testing {}");"#, property));
+        s.push_str(&format!(r#"    println!("Testing {property}");"#));
         s.push('\n');
         s.push_str(&format!("    {}_true();\n", property.to_lowercase()));
         s.push_str(&format!("    {}_false();\n", property.to_lowercase()));
@@ -373,7 +373,7 @@ fn generate_tests(data_path: &str, ranges: &[(&str, Vec<Range<u32>>)]) -> String
         s.push_str("    }\n\n");
     }
 
-    s.push_str("}");
+    s.push('}');
     s
 }
 
@@ -388,7 +388,7 @@ fn generate_asserts(s: &mut String, property: &str, points: &[u32], truthy: bool
                 range.start,
             ));
         } else {
-            s.push_str(&format!("        for chn in {:?}u32 {{\n", range));
+            s.push_str(&format!("        for chn in {range:?}u32 {{\n"));
             s.push_str(&format!(
                 "            assert!({}unicode_data::{}::lookup(std::char::from_u32(chn).unwrap()), \"{{:?}}\", chn);\n",
                 if truthy { "" } else { "!" },
@@ -439,7 +439,7 @@ fn merge_ranges(ranges: &mut Vec<Range<u32>>) {
     let mut last_end = None;
     for range in ranges {
         if let Some(last) = last_end {
-            assert!(range.start > last, "{:?}", range);
+            assert!(range.start > last, "{range:?}");
         }
         last_end = Some(range.end);
     }
diff --git a/src/tools/unicode-table-generator/src/range_search.rs b/src/tools/unicode-table-generator/src/range_search.rs
index 02f9cf16d4d..4d1dd9b423b 100644
--- a/src/tools/unicode-table-generator/src/range_search.rs
+++ b/src/tools/unicode-table-generator/src/range_search.rs
@@ -80,7 +80,7 @@ unsafe fn skip_search<const SOR: usize, const OFFSETS: usize>(
     let needle = needle as u32;
 
     let last_idx =
-        match short_offset_runs.binary_search_by_key(&(needle << 11), |header| (header.0 << 11)) {
+        match short_offset_runs.binary_search_by_key(&(needle << 11), |header| header.0 << 11) {
             Ok(idx) => idx + 1,
             Err(idx) => idx,
         };
diff --git a/src/tools/unicode-table-generator/src/raw_emitter.rs b/src/tools/unicode-table-generator/src/raw_emitter.rs
index ee94d3c93a6..e9e0efc4594 100644
--- a/src/tools/unicode-table-generator/src/raw_emitter.rs
+++ b/src/tools/unicode-table-generator/src/raw_emitter.rs
@@ -156,10 +156,10 @@ pub fn emit_codepoints(emitter: &mut RawEmitter, ranges: &[Range<u32>]) {
     emitter.blank_line();
 
     let mut bitset = emitter.clone();
-    let bitset_ok = bitset.emit_bitset(&ranges).is_ok();
+    let bitset_ok = bitset.emit_bitset(ranges).is_ok();
 
     let mut skiplist = emitter.clone();
-    skiplist.emit_skiplist(&ranges);
+    skiplist.emit_skiplist(ranges);
 
     if bitset_ok && bitset.bytes_used <= skiplist.bytes_used {
         *emitter = bitset;
@@ -174,7 +174,7 @@ pub fn emit_whitespace(emitter: &mut RawEmitter, ranges: &[Range<u32>]) {
     emitter.blank_line();
 
     let mut cascading = emitter.clone();
-    cascading.emit_cascading_map(&ranges);
+    cascading.emit_cascading_map(ranges);
     *emitter = cascading;
     emitter.desc = String::from("cascading");
 }
@@ -272,7 +272,7 @@ impl Canonicalized {
         // for canonical when possible.
         while let Some((&to, _)) = mappings
             .iter()
-            .find(|(&to, _)| to == 0)
+            .find(|&(&to, _)| to == 0)
             .or_else(|| mappings.iter().max_by_key(|m| m.1.len()))
         {
             // Get the mapping with the most entries. Currently, no mapping can
@@ -311,10 +311,9 @@ impl Canonicalized {
                     }
                 }
             }
-            assert!(
-                unique_mapping
-                    .insert(to, UniqueMapping::Canonical(canonical_words.len()))
-                    .is_none()
+            assert_eq!(
+                unique_mapping.insert(to, UniqueMapping::Canonical(canonical_words.len())),
+                None
             );
             canonical_words.push(to);
 
@@ -340,14 +339,10 @@ impl Canonicalized {
         // We'll probably always have some slack though so this loop will still
         // be needed.
         for &w in unique_words {
-            if !unique_mapping.contains_key(&w) {
-                assert!(
-                    unique_mapping
-                        .insert(w, UniqueMapping::Canonical(canonical_words.len()))
-                        .is_none()
-                );
+            unique_mapping.entry(w).or_insert_with(|| {
                 canonical_words.push(w);
-            }
+                UniqueMapping::Canonical(canonical_words.len())
+            });
         }
         assert_eq!(canonicalized_words.len() + canonical_words.len(), unique_words.len());
         assert_eq!(unique_mapping.len(), unique_words.len());
diff --git a/src/tools/x/Cargo.toml b/src/tools/x/Cargo.toml
index 84a42ca36ef..c59f5ff52a0 100644
--- a/src/tools/x/Cargo.toml
+++ b/src/tools/x/Cargo.toml
@@ -2,5 +2,5 @@
 name = "x"
 version = "0.1.1"
 description = "Run x.py slightly more conveniently"
-edition = "2021"
+edition = "2024"
 publish = false
diff --git a/src/tools/x/src/main.rs b/src/tools/x/src/main.rs
index b288cfcd5be..93167141d34 100644
--- a/src/tools/x/src/main.rs
+++ b/src/tools/x/src/main.rs
@@ -19,15 +19,14 @@ const PYTHON2: &str = "python2";
 const PYTHON3: &str = "python3";
 
 fn python() -> &'static str {
-    let val = match env::var_os("PATH") {
-        Some(val) => val,
-        None => return PYTHON,
+    let Some(path) = env::var_os("PATH") else {
+        return PYTHON;
     };
 
     let mut python2 = false;
     let mut python3 = false;
 
-    for dir in env::split_paths(&val) {
+    for dir in env::split_paths(&path) {
         // `python` should always take precedence over python2 / python3 if it exists
         if dir.join(PYTHON).with_extension(EXE_EXTENSION).exists() {
             return PYTHON;
@@ -89,7 +88,7 @@ fn exec_or_status(command: &mut Command) -> io::Result<ExitStatus> {
 fn handle_result(result: io::Result<ExitStatus>, cmd: Command) {
     match result {
         Err(error) => {
-            eprintln!("Failed to invoke `{:?}`: {}", cmd, error);
+            eprintln!("Failed to invoke `{cmd:?}`: {error}");
         }
         Ok(status) => {
             process::exit(status.code().unwrap_or(1));
@@ -98,14 +97,12 @@ fn handle_result(result: io::Result<ExitStatus>, cmd: Command) {
 }
 
 fn main() {
-    match env::args().skip(1).next().as_deref() {
-        Some("--wrapper-version") => {
-            let version = env!("CARGO_PKG_VERSION");
-            println!("{}", version);
-            return;
-        }
-        _ => {}
+    if env::args().nth(1).is_some_and(|s| s == "--wrapper-version") {
+        let version = env!("CARGO_PKG_VERSION");
+        println!("{version}");
+        return;
     }
+
     let current = match env::current_dir() {
         Ok(dir) => dir,
         Err(err) => {
@@ -113,7 +110,6 @@ fn main() {
             process::exit(1);
         }
     };
-
     for dir in current.ancestors() {
         let candidate = dir.join("x.py");
         if candidate.exists() {