Merge from rustc

38 files changed, 402 insertions, 174 deletions

diff --git a/src/bootstrap/src/core/config/config.rs b/src/bootstrap/src/core/config/config.rs
index 36de8324f67..bdd9fd755aa 100644
--- a/src/bootstrap/src/core/config/config.rs
+++ b/src/bootstrap/src/core/config/config.rs
@@ -36,6 +36,14 @@ macro_rules! check_ci_llvm {
     };
 }
 
+/// This file is embedded in the overlay directory of the tarball sources. It is
+/// useful in scenarios where developers want to see how the tarball sources were
+/// generated.
+///
+/// We also use this file to compare the host's config.toml against the CI rustc builder
+/// configuration to detect any incompatible options.
+pub(crate) const BUILDER_CONFIG_FILENAME: &str = "builder-config";
+
 #[derive(Clone, Default)]
 pub enum DryRun {
     /// This isn't a dry run.
@@ -47,7 +55,7 @@ pub enum DryRun {
     UserSelected,
 }
 
-#[derive(Copy, Clone, Default, PartialEq, Eq)]
+#[derive(Copy, Clone, Default, Debug, Eq, PartialEq)]
 pub enum DebuginfoLevel {
     #[default]
     None,
@@ -117,7 +125,7 @@ impl Display for DebuginfoLevel {
 /// 2) MSVC
 /// - Self-contained: `-Clinker=<path to rust-lld>`
 /// - External: `-Clinker=lld`
-#[derive(Default, Copy, Clone)]
+#[derive(Copy, Clone, Default, Debug, PartialEq)]
 pub enum LldMode {
     /// Do not use LLD
     #[default]
@@ -1203,40 +1211,42 @@ impl Config {
         }
     }
 
-    pub fn parse(flags: Flags) -> Config {
-        #[cfg(test)]
-        fn get_toml(_: &Path) -> TomlConfig {
-            TomlConfig::default()
-        }
+    #[cfg(test)]
+    fn get_toml(_: &Path) -> Result<TomlConfig, toml::de::Error> {
+        Ok(TomlConfig::default())
+    }
 
-        #[cfg(not(test))]
-        fn get_toml(file: &Path) -> TomlConfig {
-            let contents =
-                t!(fs::read_to_string(file), format!("config file {} not found", file.display()));
-            // Deserialize to Value and then TomlConfig to prevent the Deserialize impl of
-            // TomlConfig and sub types to be monomorphized 5x by toml.
-            toml::from_str(&contents)
-                .and_then(|table: toml::Value| TomlConfig::deserialize(table))
-                .unwrap_or_else(|err| {
-                    if let Ok(Some(changes)) = toml::from_str(&contents)
-                        .and_then(|table: toml::Value| ChangeIdWrapper::deserialize(table)).map(|change_id| change_id.inner.map(crate::find_recent_config_change_ids))
-                    {
-                        if !changes.is_empty() {
-                            println!(
-                                "WARNING: There have been changes to x.py since you last updated:\n{}",
-                                crate::human_readable_changes(&changes)
-                            );
-                        }
+    #[cfg(not(test))]
+    fn get_toml(file: &Path) -> Result<TomlConfig, toml::de::Error> {
+        let contents =
+            t!(fs::read_to_string(file), format!("config file {} not found", file.display()));
+        // Deserialize to Value and then TomlConfig to prevent the Deserialize impl of
+        // TomlConfig and sub types to be monomorphized 5x by toml.
+        toml::from_str(&contents)
+            .and_then(|table: toml::Value| TomlConfig::deserialize(table))
+            .inspect_err(|_| {
+                if let Ok(Some(changes)) = toml::from_str(&contents)
+                    .and_then(|table: toml::Value| ChangeIdWrapper::deserialize(table))
+                    .map(|change_id| change_id.inner.map(crate::find_recent_config_change_ids))
+                {
+                    if !changes.is_empty() {
+                        println!(
+                            "WARNING: There have been changes to x.py since you last updated:\n{}",
+                            crate::human_readable_changes(&changes)
+                        );
                     }
+                }
+            })
+    }
 
-                    eprintln!("failed to parse TOML configuration '{}': {err}", file.display());
-                    exit!(2);
-                })
-        }
-        Self::parse_inner(flags, get_toml)
+    pub fn parse(flags: Flags) -> Config {
+        Self::parse_inner(flags, Self::get_toml)
     }
 
-    pub(crate) fn parse_inner(mut flags: Flags, get_toml: impl Fn(&Path) -> TomlConfig) -> Config {
+    pub(crate) fn parse_inner(
+        mut flags: Flags,
+        get_toml: impl Fn(&Path) -> Result<TomlConfig, toml::de::Error>,
+    ) -> Config {
         let mut config = Config::default_opts();
 
         // Set flags.
@@ -1344,7 +1354,10 @@ impl Config {
             } else {
                 toml_path.clone()
             });
-            get_toml(&toml_path)
+            get_toml(&toml_path).unwrap_or_else(|e| {
+                eprintln!("ERROR: Failed to parse '{}': {e}", toml_path.display());
+                exit!(2);
+            })
         } else {
             config.config = None;
             TomlConfig::default()
@@ -1375,7 +1388,13 @@ impl Config {
             include_path.push("bootstrap");
             include_path.push("defaults");
             include_path.push(format!("config.{include}.toml"));
-            let included_toml = get_toml(&include_path);
+            let included_toml = get_toml(&include_path).unwrap_or_else(|e| {
+                eprintln!(
+                    "ERROR: Failed to parse default config profile at '{}': {e}",
+                    include_path.display()
+                );
+                exit!(2);
+            });
             toml.merge(included_toml, ReplaceOpt::IgnoreDuplicate);
         }
 
@@ -1591,24 +1610,6 @@ impl Config {
         let mut is_user_configured_rust_channel = false;
 
         if let Some(rust) = toml.rust {
-            if let Some(commit) = config.download_ci_rustc_commit(rust.download_rustc.clone()) {
-                // Primarily used by CI runners to avoid handling download-rustc incompatible
-                // options one by one on shell scripts.
-                let disable_ci_rustc_if_incompatible =
-                    env::var_os("DISABLE_CI_RUSTC_IF_INCOMPATIBLE")
-                        .is_some_and(|s| s == "1" || s == "true");
-
-                if let Err(e) = check_incompatible_options_for_ci_rustc(&rust) {
-                    if disable_ci_rustc_if_incompatible {
-                        config.download_rustc_commit = None;
-                    } else {
-                        panic!("{}", e);
-                    }
-                } else {
-                    config.download_rustc_commit = Some(commit);
-                }
-            }
-
             let Rust {
                 optimize: optimize_toml,
                 debug: debug_toml,
@@ -1656,7 +1657,7 @@ impl Config {
                 new_symbol_mangling,
                 profile_generate,
                 profile_use,
-                download_rustc: _,
+                download_rustc,
                 lto,
                 validate_mir_opts,
                 frame_pointers,
@@ -1668,6 +1669,8 @@ impl Config {
             is_user_configured_rust_channel = channel.is_some();
             set(&mut config.channel, channel.clone());
 
+            config.download_rustc_commit = config.download_ci_rustc_commit(download_rustc);
+
             debug = debug_toml;
             debug_assertions = debug_assertions_toml;
             debug_assertions_std = debug_assertions_std_toml;
@@ -2345,6 +2348,45 @@ impl Config {
                 None => None,
                 Some(commit) => {
                     self.download_ci_rustc(commit);
+
+                    if let Some(config_path) = &self.config {
+                        let builder_config_path =
+                            self.out.join(self.build.triple).join("ci-rustc").join(BUILDER_CONFIG_FILENAME);
+
+                        let ci_config_toml = match Self::get_toml(&builder_config_path) {
+                            Ok(ci_config_toml) => ci_config_toml,
+                            Err(e) if e.to_string().contains("unknown field") => {
+                                println!("WARNING: CI rustc has some fields that are no longer supported in bootstrap; download-rustc will be disabled.");
+                                println!("HELP: Consider rebasing to a newer commit if available.");
+                                return None;
+                            },
+                            Err(e) => {
+                                eprintln!("ERROR: Failed to parse CI rustc config at '{}': {e}", builder_config_path.display());
+                                exit!(2);
+                            },
+                        };
+
+                        let current_config_toml = Self::get_toml(config_path).unwrap();
+
+                        // Check the config compatibility
+                        // FIXME: this doesn't cover `--set` flags yet.
+                        let res = check_incompatible_options_for_ci_rustc(
+                            current_config_toml,
+                            ci_config_toml,
+                        );
+
+                        let disable_ci_rustc_if_incompatible =
+                            env::var_os("DISABLE_CI_RUSTC_IF_INCOMPATIBLE")
+                            .is_some_and(|s| s == "1" || s == "true");
+
+                        if disable_ci_rustc_if_incompatible && res.is_err() {
+                            println!("WARNING: download-rustc is disabled with `DISABLE_CI_RUSTC_IF_INCOMPATIBLE` env.");
+                            return None;
+                        }
+
+                        res.unwrap();
+                    }
+
                     Some(commit.clone())
                 }
             })
@@ -2662,31 +2704,52 @@ impl Config {
     }
 }
 
-/// Checks the CI rustc incompatible options by destructuring the `Rust` instance
-/// and makes sure that no rust options from config.toml are missed.
-fn check_incompatible_options_for_ci_rustc(rust: &Rust) -> Result<(), String> {
+/// Compares the current Rust options against those in the CI rustc builder and detects any incompatible options.
+/// It does this by destructuring the `Rust` instance to make sure every `Rust` field is covered and not missing.
+fn check_incompatible_options_for_ci_rustc(
+    current_config_toml: TomlConfig,
+    ci_config_toml: TomlConfig,
+) -> Result<(), String> {
     macro_rules! err {
-        ($name:expr) => {
-            if $name.is_some() {
-                return Err(format!(
-                    "ERROR: Setting `rust.{}` is incompatible with `rust.download-rustc`.",
-                    stringify!($name).replace("_", "-")
-                ));
-            }
+        ($current:expr, $expected:expr) => {
+            if let Some(current) = &$current {
+                if Some(current) != $expected.as_ref() {
+                    return Err(format!(
+                        "ERROR: Setting `rust.{}` is incompatible with `rust.download-rustc`. \
+                        Current value: {:?}, Expected value(s): {}{:?}",
+                        stringify!($expected).replace("_", "-"),
+                        $current,
+                        if $expected.is_some() { "None/" } else { "" },
+                        $expected,
+                    ));
+                };
+            };
         };
     }
 
     macro_rules! warn {
-        ($name:expr) => {
-            if $name.is_some() {
-                println!(
-                    "WARNING: `rust.{}` has no effect with `rust.download-rustc`.",
-                    stringify!($name).replace("_", "-")
-                );
-            }
+        ($current:expr, $expected:expr) => {
+            if let Some(current) = &$current {
+                if Some(current) != $expected.as_ref() {
+                    println!(
+                        "WARNING: `rust.{}` has no effect with `rust.download-rustc`. \
+                        Current value: {:?}, Expected value(s): {}{:?}",
+                        stringify!($expected).replace("_", "-"),
+                        $current,
+                        if $expected.is_some() { "None/" } else { "" },
+                        $expected,
+                    );
+                };
+            };
         };
     }
 
+    let (Some(current_rust_config), Some(ci_rust_config)) =
+        (current_config_toml.rust, ci_config_toml.rust)
+    else {
+        return Ok(());
+    };
+
     let Rust {
         // Following options are the CI rustc incompatible ones.
         optimize,
@@ -2744,7 +2807,7 @@ fn check_incompatible_options_for_ci_rustc(rust: &Rust) -> Result<(), String> {
         download_rustc: _,
         validate_mir_opts: _,
         frame_pointers: _,
-    } = rust;
+    } = ci_rust_config;
 
     // There are two kinds of checks for CI rustc incompatible options:
     //    1. Checking an option that may change the compiler behaviour/output.
@@ -2752,22 +2815,23 @@ fn check_incompatible_options_for_ci_rustc(rust: &Rust) -> Result<(), String> {
     //
     // If the option belongs to the first category, we call `err` macro for a hard error;
     // otherwise, we just print a warning with `warn` macro.
-    err!(optimize);
-    err!(debug_logging);
-    err!(debuginfo_level_rustc);
-    err!(default_linker);
-    err!(rpath);
-    err!(strip);
-    err!(stack_protector);
-    err!(lld_mode);
-    err!(llvm_tools);
-    err!(llvm_bitcode_linker);
-    err!(jemalloc);
-    err!(lto);
-
-    warn!(channel);
-    warn!(description);
-    warn!(incremental);
+
+    err!(current_rust_config.optimize, optimize);
+    err!(current_rust_config.debug_logging, debug_logging);
+    err!(current_rust_config.debuginfo_level_rustc, debuginfo_level_rustc);
+    err!(current_rust_config.rpath, rpath);
+    err!(current_rust_config.strip, strip);
+    err!(current_rust_config.lld_mode, lld_mode);
+    err!(current_rust_config.llvm_tools, llvm_tools);
+    err!(current_rust_config.llvm_bitcode_linker, llvm_bitcode_linker);
+    err!(current_rust_config.jemalloc, jemalloc);
+    err!(current_rust_config.default_linker, default_linker);
+    err!(current_rust_config.stack_protector, stack_protector);
+    err!(current_rust_config.lto, lto);
+
+    warn!(current_rust_config.channel, channel);
+    warn!(current_rust_config.description, description);
+    warn!(current_rust_config.incremental, incremental);
 
     Ok(())
 }
diff --git a/src/bootstrap/src/core/config/tests.rs b/src/bootstrap/src/core/config/tests.rs
index 40f3e5e7222..378d069672f 100644
--- a/src/bootstrap/src/core/config/tests.rs
+++ b/src/bootstrap/src/core/config/tests.rs
@@ -14,7 +14,7 @@ use crate::core::config::{LldMode, Target, TargetSelection, TomlConfig};
 fn parse(config: &str) -> Config {
     Config::parse_inner(
         Flags::parse(&["check".to_string(), "--config=/does/not/exist".to_string()]),
-        |&_| toml::from_str(&config).unwrap(),
+        |&_| toml::from_str(&config),
     )
 }
 
@@ -151,7 +151,6 @@ runner = "x86_64-runner"
 
                 "#,
             )
-            .unwrap()
         },
     );
     assert_eq!(config.change_id, Some(1), "setting top-level value");
@@ -208,13 +207,13 @@ fn override_toml_duplicate() {
             "--set=change-id=1".to_owned(),
             "--set=change-id=2".to_owned(),
         ]),
-        |&_| toml::from_str("change-id = 0").unwrap(),
+        |&_| toml::from_str("change-id = 0"),
     );
 }
 
 #[test]
 fn profile_user_dist() {
-    fn get_toml(file: &Path) -> TomlConfig {
+    fn get_toml(file: &Path) -> Result<TomlConfig, toml::de::Error> {
         let contents =
             if file.ends_with("config.toml") || env::var_os("RUST_BOOTSTRAP_CONFIG").is_some() {
                 "profile = \"user\"".to_owned()
@@ -223,9 +222,7 @@ fn profile_user_dist() {
                 std::fs::read_to_string(file).unwrap()
             };
 
-        toml::from_str(&contents)
-            .and_then(|table: toml::Value| TomlConfig::deserialize(table))
-            .unwrap()
+        toml::from_str(&contents).and_then(|table: toml::Value| TomlConfig::deserialize(table))
     }
     Config::parse_inner(Flags::parse(&["check".to_owned()]), get_toml);
 }
diff --git a/src/bootstrap/src/core/download.rs b/src/bootstrap/src/core/download.rs
index fd85650bc56..ae39afa1fa2 100644
--- a/src/bootstrap/src/core/download.rs
+++ b/src/bootstrap/src/core/download.rs
@@ -9,6 +9,7 @@ use std::sync::OnceLock;
 use build_helper::ci::CiEnv;
 use xz2::bufread::XzDecoder;
 
+use crate::core::config::BUILDER_CONFIG_FILENAME;
 use crate::utils::exec::{command, BootstrapCommand};
 use crate::utils::helpers::{check_run, exe, hex_encode, move_file, program_out_of_date};
 use crate::{t, Config};
@@ -273,11 +274,12 @@ impl Config {
 
         let mut tar = tar::Archive::new(decompressor);
 
+        let is_ci_rustc = dst.ends_with("ci-rustc");
+
         // `compile::Sysroot` needs to know the contents of the `rustc-dev` tarball to avoid adding
         // it to the sysroot unless it was explicitly requested. But parsing the 100 MB tarball is slow.
         // Cache the entries when we extract it so we only have to read it once.
-        let mut recorded_entries =
-            if dst.ends_with("ci-rustc") { recorded_entries(dst, pattern) } else { None };
+        let mut recorded_entries = if is_ci_rustc { recorded_entries(dst, pattern) } else { None };
 
         for member in t!(tar.entries()) {
             let mut member = t!(member);
@@ -287,10 +289,12 @@ impl Config {
                 continue;
             }
             let mut short_path = t!(original_path.strip_prefix(directory_prefix));
-            if !short_path.starts_with(pattern) {
+            let is_builder_config = short_path.to_str() == Some(BUILDER_CONFIG_FILENAME);
+
+            if !(short_path.starts_with(pattern) || (is_ci_rustc && is_builder_config)) {
                 continue;
             }
-            short_path = t!(short_path.strip_prefix(pattern));
+            short_path = short_path.strip_prefix(pattern).unwrap_or(short_path);
             let dst_path = dst.join(short_path);
             self.verbose(|| {
                 println!("extracting {} to {}", original_path.display(), dst.display())
@@ -703,9 +707,7 @@ download-rustc = false
             let file_times = fs::FileTimes::new().set_accessed(now).set_modified(now);
 
             let llvm_config = llvm_root.join("bin").join(exe("llvm-config", self.build));
-            let llvm_config_file = t!(File::options().write(true).open(llvm_config));
-
-            t!(llvm_config_file.set_times(file_times));
+            t!(crate::utils::helpers::set_file_times(llvm_config, file_times));
 
             if self.should_fix_bins_and_dylibs() {
                 let llvm_lib = llvm_root.join("lib");
diff --git a/src/bootstrap/src/lib.rs b/src/bootstrap/src/lib.rs
index bfd0e42acfd..784519a20a2 100644
--- a/src/bootstrap/src/lib.rs
+++ b/src/bootstrap/src/lib.rs
@@ -37,7 +37,9 @@ use crate::core::builder;
 use crate::core::builder::{Builder, Kind};
 use crate::core::config::{flags, DryRun, LldMode, LlvmLibunwind, Target, TargetSelection};
 use crate::utils::exec::{command, BehaviorOnFailure, BootstrapCommand, CommandOutput, OutputMode};
-use crate::utils::helpers::{self, dir_is_empty, exe, libdir, mtime, output, symlink_dir};
+use crate::utils::helpers::{
+    self, dir_is_empty, exe, libdir, mtime, output, set_file_times, symlink_dir,
+};
 
 mod core;
 mod utils;
@@ -1056,11 +1058,29 @@ Executed at: {executed_at}"#,
             }
         };
 
-        let fail = |message: &str| {
+        let fail = |message: &str, output: CommandOutput| -> ! {
             if self.is_verbose() {
                 println!("{message}");
             } else {
-                println!("Command has failed. Rerun with -v to see more details.");
+                let (stdout, stderr) = (output.stdout_if_present(), output.stderr_if_present());
+                // If the command captures output, the user would not see any indication that
+                // it has failed. In this case, print a more verbose error, since to provide more
+                // context.
+                if stdout.is_some() || stderr.is_some() {
+                    if let Some(stdout) =
+                        output.stdout_if_present().take_if(|s| !s.trim().is_empty())
+                    {
+                        println!("STDOUT:\n{stdout}\n");
+                    }
+                    if let Some(stderr) =
+                        output.stderr_if_present().take_if(|s| !s.trim().is_empty())
+                    {
+                        println!("STDERR:\n{stderr}\n");
+                    }
+                    println!("Command {command:?} has failed. Rerun with -v to see more details.");
+                } else {
+                    println!("Command has failed. Rerun with -v to see more details.");
+                }
             }
             exit!(1);
         };
@@ -1069,14 +1089,14 @@ Executed at: {executed_at}"#,
             match command.failure_behavior {
                 BehaviorOnFailure::DelayFail => {
                     if self.fail_fast {
-                        fail(&message);
+                        fail(&message, output);
                     }
 
                     let mut failures = self.delayed_failures.borrow_mut();
                     failures.push(message);
                 }
                 BehaviorOnFailure::Exit => {
-                    fail(&message);
+                    fail(&message, output);
                 }
                 BehaviorOnFailure::Ignore => {
                     // If failures are allowed, either the error has been printed already
@@ -1774,21 +1794,20 @@ Executed at: {executed_at}"#,
             }
         }
         if let Ok(()) = fs::hard_link(&src, dst) {
-            // Attempt to "easy copy" by creating a hard link
-            // (symlinks don't work on windows), but if that fails
-            // just fall back to a slow `copy` operation.
+            // Attempt to "easy copy" by creating a hard link (symlinks are priviledged on windows),
+            // but if that fails just fall back to a slow `copy` operation.
         } else {
             if let Err(e) = fs::copy(&src, dst) {
                 panic!("failed to copy `{}` to `{}`: {}", src.display(), dst.display(), e)
             }
             t!(fs::set_permissions(dst, metadata.permissions()));
 
+            // Restore file times because changing permissions on e.g. Linux using `chmod` can cause
+            // file access time to change.
             let file_times = fs::FileTimes::new()
                 .set_accessed(t!(metadata.accessed()))
                 .set_modified(t!(metadata.modified()));
-
-            let dst_file = t!(fs::File::open(dst));
-            t!(dst_file.set_times(file_times));
+            t!(set_file_times(dst, file_times));
         }
     }
 
diff --git a/src/bootstrap/src/utils/exec.rs b/src/bootstrap/src/utils/exec.rs
index 9f0d0b7e969..530d760a584 100644
--- a/src/bootstrap/src/utils/exec.rs
+++ b/src/bootstrap/src/utils/exec.rs
@@ -292,6 +292,11 @@ impl CommandOutput {
     }
 
     #[must_use]
+    pub fn stdout_if_present(&self) -> Option<String> {
+        self.stdout.as_ref().and_then(|s| String::from_utf8(s.clone()).ok())
+    }
+
+    #[must_use]
     pub fn stdout_if_ok(&self) -> Option<String> {
         if self.is_success() { Some(self.stdout()) } else { None }
     }
@@ -303,6 +308,11 @@ impl CommandOutput {
         )
         .expect("Cannot parse process stderr as UTF-8")
     }
+
+    #[must_use]
+    pub fn stderr_if_present(&self) -> Option<String> {
+        self.stderr.as_ref().and_then(|s| String::from_utf8(s.clone()).ok())
+    }
 }
 
 impl Default for CommandOutput {
diff --git a/src/bootstrap/src/utils/helpers.rs b/src/bootstrap/src/utils/helpers.rs
index 65e75f114bb..a856c99ff55 100644
--- a/src/bootstrap/src/utils/helpers.rs
+++ b/src/bootstrap/src/utils/helpers.rs
@@ -544,3 +544,15 @@ pub fn get_closest_merge_base_commit(
 
     Ok(output_result(git.as_command_mut())?.trim().to_owned())
 }
+
+/// Sets the file times for a given file at `path`.
+pub fn set_file_times<P: AsRef<Path>>(path: P, times: fs::FileTimes) -> io::Result<()> {
+    // Windows requires file to be writable to modify file times. But on Linux CI the file does not
+    // need to be writable to modify file times and might be read-only.
+    let f = if cfg!(windows) {
+        fs::File::options().write(true).open(path)?
+    } else {
+        fs::File::open(path)?
+    };
+    f.set_times(times)
+}
diff --git a/src/bootstrap/src/utils/helpers/tests.rs b/src/bootstrap/src/utils/helpers/tests.rs
index 103c4d26a18..86016a91e49 100644
--- a/src/bootstrap/src/utils/helpers/tests.rs
+++ b/src/bootstrap/src/utils/helpers/tests.rs
@@ -3,7 +3,8 @@ use std::io::Write;
 use std::path::PathBuf;
 
 use crate::utils::helpers::{
-    check_cfg_arg, extract_beta_rev, hex_encode, make, program_out_of_date, symlink_dir,
+    check_cfg_arg, extract_beta_rev, hex_encode, make, program_out_of_date, set_file_times,
+    symlink_dir,
 };
 use crate::{Config, Flags};
 
@@ -92,3 +93,25 @@ fn test_symlink_dir() {
     #[cfg(not(windows))]
     fs::remove_file(link_path).unwrap();
 }
+
+#[test]
+fn test_set_file_times_sanity_check() {
+    let config =
+        Config::parse(Flags::parse(&["check".to_owned(), "--config=/does/not/exist".to_owned()]));
+    let tempfile = config.tempdir().join(".tmp-file");
+
+    {
+        File::create(&tempfile).unwrap().write_all(b"dummy value").unwrap();
+        assert!(tempfile.exists());
+    }
+
+    // This might only fail on Windows (if file is default read-only then we try to modify file
+    // times).
+    let unix_epoch = std::time::SystemTime::UNIX_EPOCH;
+    let target_time = fs::FileTimes::new().set_accessed(unix_epoch).set_modified(unix_epoch);
+    set_file_times(&tempfile, target_time).unwrap();
+
+    let found_metadata = fs::metadata(tempfile).unwrap();
+    assert_eq!(found_metadata.accessed().unwrap(), unix_epoch);
+    assert_eq!(found_metadata.modified().unwrap(), unix_epoch)
+}
diff --git a/src/bootstrap/src/utils/tarball.rs b/src/bootstrap/src/utils/tarball.rs
index 3f7f6214cf6..3c6c7a7fa18 100644
--- a/src/bootstrap/src/utils/tarball.rs
+++ b/src/bootstrap/src/utils/tarball.rs
@@ -9,6 +9,7 @@ use std::path::{Path, PathBuf};
 
 use crate::core::build_steps::dist::distdir;
 use crate::core::builder::{Builder, Kind};
+use crate::core::config::BUILDER_CONFIG_FILENAME;
 use crate::utils::exec::BootstrapCommand;
 use crate::utils::helpers::{move_file, t};
 use crate::utils::{channel, helpers};
@@ -320,7 +321,7 @@ impl<'a> Tarball<'a> {
 
         // Add config file if present.
         if let Some(config) = &self.builder.config.config {
-            self.add_renamed_file(config, &self.overlay_dir, "builder-config");
+            self.add_renamed_file(config, &self.overlay_dir, BUILDER_CONFIG_FILENAME);
         }
 
         for file in self.overlay.legal_and_readme() {
diff --git a/src/doc/book b/src/doc/book
-Subproject 67fa536768013d9d5a13f3a06790521d511ef71
+Subproject 04bc1396bb857f35b5dda1d773c9571e1f25330
diff --git a/src/doc/edition-guide b/src/doc/edition-guide
-Subproject 5454de3d12b9ccc6375b629cf7ccda8264640aa
+Subproject aeeb287d41a0332c210da122bea8e0e91844ab3
diff --git a/src/doc/nomicon b/src/doc/nomicon
-Subproject 0ebdacadbda8ce2cd8fbf93985e15af61a7ab89
+Subproject 6ecf95c5f2bfa0e6314dfe282bf775fd1405f7e
diff --git a/src/doc/reference b/src/doc/reference
-Subproject 2e191814f163ee1e77e2d6094eee4dd78a289c5
+Subproject 62cd0df95061ba0ac886333f5cd7f3012f149da
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
-Subproject 89aecb6951b77bc746da73df8c9f2b2ceaad494
+Subproject 8f94061936e492159f4f6c09c0f917a7521893f
diff --git a/src/doc/rustc-dev-guide b/src/doc/rustc-dev-guide
-Subproject 0c4d55cb59fe440d1a630e4e5774d043968edb3
+Subproject 43d83780db545a1ed6d45773312fc578987e396
diff --git a/src/doc/rustc/src/SUMMARY.md b/src/doc/rustc/src/SUMMARY.md
index 467fd6f43e4..cb0b2e63452 100644
--- a/src/doc/rustc/src/SUMMARY.md
+++ b/src/doc/rustc/src/SUMMARY.md
@@ -61,6 +61,7 @@
     - [mipsisa\*r6\*-unknown-linux-gnu\*](platform-support/mips-release-6.md)
     - [nvptx64-nvidia-cuda](platform-support/nvptx64-nvidia-cuda.md)
     - [powerpc-unknown-openbsd](platform-support/powerpc-unknown-openbsd.md)
+    - [powerpc-unknown-linux-muslspe](platform-support/powerpc-unknown-linux-muslspe.md)
     - [powerpc64-ibm-aix](platform-support/aix.md)
     - [riscv32im-risc0-zkvm-elf](platform-support/riscv32im-risc0-zkvm-elf.md)
     - [riscv32imac-unknown-xous-elf](platform-support/riscv32imac-unknown-xous-elf.md)
diff --git a/src/doc/rustc/src/platform-support.md b/src/doc/rustc/src/platform-support.md
index bd12172ecbb..c3f73a8367a 100644
--- a/src/doc/rustc/src/platform-support.md
+++ b/src/doc/rustc/src/platform-support.md
@@ -332,6 +332,7 @@ target | std | host | notes
 `msp430-none-elf` | * |  | 16-bit MSP430 microcontrollers
 `powerpc-unknown-linux-gnuspe` | ✓ |  | PowerPC SPE Linux
 `powerpc-unknown-linux-musl` | ? |  | PowerPC Linux with musl 1.2.3
+[`powerpc-unknown-linux-muslspe`](platform-support/powerpc-unknown-linux-muslspe.md) | ? |  | PowerPC SPE Linux
 [`powerpc-unknown-netbsd`](platform-support/netbsd.md) | ✓ | ✓ | NetBSD 32-bit powerpc systems
 [`powerpc-unknown-openbsd`](platform-support/powerpc-unknown-openbsd.md) | * |  |
 [`powerpc-wrs-vxworks-spe`](platform-support/vxworks.md) | ✓ |  |
diff --git a/src/doc/rustc/src/platform-support/android.md b/src/doc/rustc/src/platform-support/android.md
index 9ddf00e3a50..96499b0d801 100644
--- a/src/doc/rustc/src/platform-support/android.md
+++ b/src/doc/rustc/src/platform-support/android.md
@@ -61,3 +61,8 @@ Currently the `riscv64-linux-android` target requires the following architecture
 * `Zba` (address calculation instructions)
 * `Zbb` (base instructions)
 * `Zbs` (single-bit instructions)
+
+### aarch64-linux-android on Nightly compilers
+
+As soon as `-Zfixed-x18` compiler flag is supplied, the [`ShadowCallStack` sanitizer](https://releases.llvm.org/7.0.1/tools/clang/docs/ShadowCallStack.html)
+instrumentation is also made avaiable by supplying the second compiler flag `-Zsanitizer=shadow-call-stack`.
diff --git a/src/doc/rustc/src/platform-support/powerpc-unknown-linux-muslspe.md b/src/doc/rustc/src/platform-support/powerpc-unknown-linux-muslspe.md
new file mode 100644
index 00000000000..4c416b51929
--- /dev/null
+++ b/src/doc/rustc/src/platform-support/powerpc-unknown-linux-muslspe.md
@@ -0,0 +1,32 @@
+# powerpc-unknown-linux-muslspe
+
+**Tier: 3**
+
+This target is very similar to already existing ones like `powerpc_unknown_linux_musl` and `powerpc_unknown_linux_gnuspe`.
+This one has PowerPC SPE support for musl. Unfortunately, the last supported gcc version with PowerPC SPE is 8.4.0.
+
+## Target maintainers
+
+- [@BKPepe](https://github.com/BKPepe)
+
+## Requirements
+
+This target is cross-compiled. There is no support for `std`. There is no
+default allocator, but it's possible to use `alloc` by supplying an allocator.
+
+This target generated binaries in the ELF format.
+
+## Building the target
+
+This target was tested and used within the `OpenWrt` build system for CZ.NIC Turris 1.x routers using Freescale P2020.
+
+## Building Rust programs
+
+Rust does not yet ship pre-compiled artifacts for this target. To compile for
+this target, you will either need to build Rust with the target enabled (see
+"Building the target" above), or build your own copy of `core` by using
+`build-std` or similar.
+
+## Testing
+
+This is a cross-compiled target and there is no support to run rustc test suite.
diff --git a/src/doc/rustdoc/src/unstable-features.md b/src/doc/rustdoc/src/unstable-features.md
index 39f24a13143..ebbe141b6f5 100644
--- a/src/doc/rustdoc/src/unstable-features.md
+++ b/src/doc/rustdoc/src/unstable-features.md
@@ -515,6 +515,9 @@ pub fn no_documentation() {}
 
 Note that the third item is the crate root, which in this case is undocumented.
 
+If you want the JSON output to be displayed on `stdout` instead of having a file generated, you can
+use `-o -`.
+
 ### `-w`/`--output-format`: output format
 
 `--output-format json` emits documentation in the experimental
diff --git a/src/doc/unstable-book/src/compiler-flags/fixed-x18.md b/src/doc/unstable-book/src/compiler-flags/fixed-x18.md
index 8c8bff5fa29..b215bc84fbb 100644
--- a/src/doc/unstable-book/src/compiler-flags/fixed-x18.md
+++ b/src/doc/unstable-book/src/compiler-flags/fixed-x18.md
@@ -1,7 +1,7 @@
 # `fixed-x18`
 
 This option prevents the compiler from using the x18 register. It is only
-supported on aarch64.
+supported on `aarch64`.
 
 From the [ABI spec][arm-abi]:
 
@@ -23,6 +23,11 @@ Currently, the `-Zsanitizer=shadow-call-stack` flag is only supported on
 platforms that always treat x18 as a reserved register, and the `-Zfixed-x18`
 flag is not required to use the sanitizer on such platforms. However, the
 sanitizer may be supported on targets where this is not the case in the future.
+One way to do so now on Nightly compilers is to explicitly supply this `-Zfixed-x18`
+flag with `aarch64` targets, so that the sanitizer is available for instrumentation
+on targets like `aarch64-unknown-none`, for instance. However, discretion is still
+required to make sure that the runtime support is in place for this sanitizer
+to be effective.
 
 It is undefined behavior for `-Zsanitizer=shadow-call-stack` code to call into
 code where x18 is a temporary register. On the other hand, when you are *not*
diff --git a/src/doc/unstable-book/src/compiler-flags/sanitizer.md b/src/doc/unstable-book/src/compiler-flags/sanitizer.md
index 72b44e002b4..edc63a25ac1 100644
--- a/src/doc/unstable-book/src/compiler-flags/sanitizer.md
+++ b/src/doc/unstable-book/src/compiler-flags/sanitizer.md
@@ -787,6 +787,10 @@ A runtime must be provided by the application or operating system.
 
 See the [Clang ShadowCallStack documentation][clang-scs] for more details.
 
+* `aarch64-unknown-none`
+
+In addition to support from a runtime by the application or operating system, the `-Zfixed-x18` flag is also mandatory.
+
 # ThreadSanitizer
 
 ThreadSanitizer is a data race detection tool. It is supported on the following
diff --git a/src/librustdoc/config.rs b/src/librustdoc/config.rs
index d599fead266..9e9d8f02a2e 100644
--- a/src/librustdoc/config.rs
+++ b/src/librustdoc/config.rs
@@ -286,6 +286,9 @@ pub(crate) struct RenderOptions {
     pub(crate) no_emit_shared: bool,
     /// If `true`, HTML source code pages won't be generated.
     pub(crate) html_no_source: bool,
+    /// This field is only used for the JSON output. If it's set to true, no file will be created
+    /// and content will be displayed in stdout directly.
+    pub(crate) output_to_stdout: bool,
 }
 
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
@@ -548,16 +551,17 @@ impl Options {
             dcx.fatal("the `--test` flag must be passed to enable `--no-run`");
         }
 
+        let mut output_to_stdout = false;
         let test_builder_wrappers =
             matches.opt_strs("test-builder-wrapper").iter().map(PathBuf::from).collect();
-        let out_dir = matches.opt_str("out-dir").map(|s| PathBuf::from(&s));
-        let output = matches.opt_str("output").map(|s| PathBuf::from(&s));
-        let output = match (out_dir, output) {
+        let output = match (matches.opt_str("out-dir"), matches.opt_str("output")) {
             (Some(_), Some(_)) => {
                 dcx.fatal("cannot use both 'out-dir' and 'output' at once");
             }
-            (Some(out_dir), None) => out_dir,
-            (None, Some(output)) => output,
+            (Some(out_dir), None) | (None, Some(out_dir)) => {
+                output_to_stdout = out_dir == "-";
+                PathBuf::from(out_dir)
+            }
             (None, None) => PathBuf::from("doc"),
         };
 
@@ -818,6 +822,7 @@ impl Options {
             call_locations,
             no_emit_shared: false,
             html_no_source,
+            output_to_stdout,
         };
         Some((options, render_options))
     }
diff --git a/src/librustdoc/json/mod.rs b/src/librustdoc/json/mod.rs
index ea191dc89cf..a424faaf999 100644
--- a/src/librustdoc/json/mod.rs
+++ b/src/librustdoc/json/mod.rs
@@ -9,16 +9,19 @@ mod import_finder;
 
 use std::cell::RefCell;
 use std::fs::{create_dir_all, File};
-use std::io::{BufWriter, Write};
+use std::io::{stdout, BufWriter, Write};
 use std::path::PathBuf;
 use std::rc::Rc;
 
-use rustc_data_structures::fx::FxHashMap;
 use rustc_hir::def_id::{DefId, DefIdSet};
 use rustc_middle::ty::TyCtxt;
 use rustc_session::Session;
 use rustc_span::def_id::LOCAL_CRATE;
 use rustdoc_json_types as types;
+// It's important to use the FxHashMap from rustdoc_json_types here, instead of
+// the one from rustc_data_structures, as they're different types due to sysroots.
+// See #110051 and #127456 for details
+use rustdoc_json_types::FxHashMap;
 
 use crate::clean::types::{ExternalCrate, ExternalLocation};
 use crate::clean::ItemKind;
@@ -37,7 +40,7 @@ pub(crate) struct JsonRenderer<'tcx> {
     /// level field of the JSON blob.
     index: Rc<RefCell<FxHashMap<types::Id, types::Item>>>,
     /// The directory where the blob will be written to.
-    out_path: PathBuf,
+    out_path: Option<PathBuf>,
     cache: Rc<Cache>,
     imported_items: DefIdSet,
 }
@@ -97,6 +100,20 @@ impl<'tcx> JsonRenderer<'tcx> {
             })
             .unwrap_or_default()
     }
+
+    fn write<T: Write>(
+        &self,
+        output: types::Crate,
+        mut writer: BufWriter<T>,
+        path: &str,
+    ) -> Result<(), Error> {
+        self.tcx
+            .sess
+            .time("rustdoc_json_serialization", || serde_json::ser::to_writer(&mut writer, &output))
+            .unwrap();
+        try_err!(writer.flush(), path);
+        Ok(())
+    }
 }
 
 impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
@@ -120,7 +137,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
             JsonRenderer {
                 tcx,
                 index: Rc::new(RefCell::new(FxHashMap::default())),
-                out_path: options.output,
+                out_path: if options.output_to_stdout { None } else { Some(options.output) },
                 cache: Rc::new(cache),
                 imported_items,
             },
@@ -220,14 +237,11 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
         let index = (*self.index).clone().into_inner();
 
         debug!("Constructing Output");
-        // This needs to be the default HashMap for compatibility with the public interface for
-        // rustdoc-json-types
-        #[allow(rustc::default_hash_types)]
         let output = types::Crate {
             root: types::Id(format!("0:0:{}", e.name(self.tcx).as_u32())),
             crate_version: self.cache.crate_version.clone(),
             includes_private: self.cache.document_private,
-            index: index.into_iter().collect(),
+            index,
             paths: self
                 .cache
                 .paths
@@ -264,20 +278,21 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
                 .collect(),
             format_version: types::FORMAT_VERSION,
         };
-        let out_dir = self.out_path.clone();
-        try_err!(create_dir_all(&out_dir), out_dir);
+        if let Some(ref out_path) = self.out_path {
+            let out_dir = out_path.clone();
+            try_err!(create_dir_all(&out_dir), out_dir);
 
-        let mut p = out_dir;
-        p.push(output.index.get(&output.root).unwrap().name.clone().unwrap());
-        p.set_extension("json");
-        let mut file = BufWriter::new(try_err!(File::create(&p), p));
-        self.tcx
-            .sess
-            .time("rustdoc_json_serialization", || serde_json::ser::to_writer(&mut file, &output))
-            .unwrap();
-        try_err!(file.flush(), p);
-
-        Ok(())
+            let mut p = out_dir;
+            p.push(output.index.get(&output.root).unwrap().name.clone().unwrap());
+            p.set_extension("json");
+            self.write(
+                output,
+                BufWriter::new(try_err!(File::create(&p), p)),
+                &p.display().to_string(),
+            )
+        } else {
+            self.write(output, BufWriter::new(stdout()), "<stdout>")
+        }
     }
 
     fn cache(&self) -> &Cache {
diff --git a/src/llvm-project b/src/llvm-project
-Subproject 57ae1a3474057fead2c438928ed368b3740bf0e
+Subproject ccf4c38bdd73f1a37ec266c73bdaef80e39f8cf
diff --git a/src/rustdoc-json-types/lib.rs b/src/rustdoc-json-types/lib.rs
index 999134a4090..40a90c1a565 100644
--- a/src/rustdoc-json-types/lib.rs
+++ b/src/rustdoc-json-types/lib.rs
@@ -5,7 +5,7 @@
 
 use std::path::PathBuf;
 
-use rustc_hash::FxHashMap;
+pub use rustc_hash::FxHashMap;
 use serde::{Deserialize, Serialize};
 
 /// The version of JSON output that this crate represents.
diff --git a/src/tools/cargo b/src/tools/cargo
-Subproject 0d8d22f83b066503f6b2b755925197e959e58b4
+Subproject 2f738d617c6ead388f899802dd1a7fd66858a69
diff --git a/src/tools/clippy/clippy_dev/src/new_lint.rs b/src/tools/clippy/clippy_dev/src/new_lint.rs
index de91233d196..87117832fb9 100644
--- a/src/tools/clippy/clippy_dev/src/new_lint.rs
+++ b/src/tools/clippy/clippy_dev/src/new_lint.rs
@@ -470,7 +470,7 @@ fn setup_mod_file(path: &Path, lint: &LintData<'_>) -> io::Result<&'static str>
     });
 
     // Find both the last lint declaration (declare_clippy_lint!) and the lint pass impl
-    while let Some(LintDeclSearchResult { content, .. }) = iter.find(|result| result.token_kind == TokenKind::Ident) {
+    while let Some(LintDeclSearchResult { content, .. }) = iter.find(|result| result.token == TokenKind::Ident) {
         let mut iter = iter
             .by_ref()
             .filter(|t| !matches!(t.token_kind, TokenKind::Whitespace | TokenKind::LineComment { .. }));
@@ -480,7 +480,7 @@ fn setup_mod_file(path: &Path, lint: &LintData<'_>) -> io::Result<&'static str>
                 // matches `!{`
                 match_tokens!(iter, Bang OpenBrace);
                 if let Some(LintDeclSearchResult { range, .. }) =
-                    iter.find(|result| result.token_kind == TokenKind::CloseBrace)
+                    iter.find(|result| result.token == TokenKind::CloseBrace)
                 {
                     last_decl_curly_offset = Some(range.end);
                 }
diff --git a/src/tools/miri/src/lib.rs b/src/tools/miri/src/lib.rs
index 047ac0f39d1..f796e845a23 100644
--- a/src/tools/miri/src/lib.rs
+++ b/src/tools/miri/src/lib.rs
@@ -12,7 +12,6 @@
 #![feature(let_chains)]
 #![feature(trait_upcasting)]
 #![feature(strict_overflow_ops)]
-#![feature(is_none_or)]
 // Configure clippy and other lints
 #![allow(
     clippy::collapsible_else_if,
diff --git a/src/tools/run-make-support/Cargo.toml b/src/tools/run-make-support/Cargo.toml
index c4d5446a248..eae6022b803 100644
--- a/src/tools/run-make-support/Cargo.toml
+++ b/src/tools/run-make-support/Cargo.toml
@@ -11,3 +11,4 @@ wasmparser = { version = "0.214", default-features = false, features = ["std"] }
 regex = "1.8" # 1.8 to avoid memchr 2.6.0, as 2.5.0 is pinned in the workspace
 gimli = "0.31.0"
 build_helper = { path = "../build_helper" }
+serde_json = "1.0"
diff --git a/src/tools/run-make-support/src/external_deps/llvm.rs b/src/tools/run-make-support/src/external_deps/llvm.rs
index 7af79443aff..e9315856cd7 100644
--- a/src/tools/run-make-support/src/external_deps/llvm.rs
+++ b/src/tools/run-make-support/src/external_deps/llvm.rs
@@ -285,12 +285,24 @@ impl LlvmAr {
         self
     }
 
+    /// Like `obj_to_ar` except creating a thin archive.
+    pub fn obj_to_thin_ar(&mut self) -> &mut Self {
+        self.cmd.arg("rcus").arg("--thin");
+        self
+    }
+
     /// Extract archive members back to files.
     pub fn extract(&mut self) -> &mut Self {
         self.cmd.arg("x");
         self
     }
 
+    /// Print the table of contents.
+    pub fn table_of_contents(&mut self) -> &mut Self {
+        self.cmd.arg("t");
+        self
+    }
+
     /// Provide an output, then an input file. Bundled in one function, as llvm-ar has
     /// no "--output"-style flag.
     pub fn output_input(&mut self, out: impl AsRef<Path>, input: impl AsRef<Path>) -> &mut Self {
diff --git a/src/tools/run-make-support/src/external_deps/rustdoc.rs b/src/tools/run-make-support/src/external_deps/rustdoc.rs
index 96c2218a563..96b1c719e2e 100644
--- a/src/tools/run-make-support/src/external_deps/rustdoc.rs
+++ b/src/tools/run-make-support/src/external_deps/rustdoc.rs
@@ -71,14 +71,8 @@ impl Rustdoc {
         self
     }
 
-    /// Specify path to the output folder.
-    pub fn output<P: AsRef<Path>>(&mut self, path: P) -> &mut Self {
-        self.cmd.arg("-o");
-        self.cmd.arg(path.as_ref());
-        self
-    }
-
     /// Specify output directory.
+    #[doc(alias = "output")]
     pub fn out_dir<P: AsRef<Path>>(&mut self, path: P) -> &mut Self {
         self.cmd.arg("--out-dir").arg(path.as_ref());
         self
diff --git a/src/tools/run-make-support/src/lib.rs b/src/tools/run-make-support/src/lib.rs
index 4bef4f05007..fc20fd3b2e8 100644
--- a/src/tools/run-make-support/src/lib.rs
+++ b/src/tools/run-make-support/src/lib.rs
@@ -38,6 +38,7 @@ pub use bstr;
 pub use gimli;
 pub use object;
 pub use regex;
+pub use serde_json;
 pub use wasmparser;
 
 // Re-exports of external dependencies.
diff --git a/src/tools/run-make-support/src/path_helpers.rs b/src/tools/run-make-support/src/path_helpers.rs
index b788bc6ef30..1e6e44c4584 100644
--- a/src/tools/run-make-support/src/path_helpers.rs
+++ b/src/tools/run-make-support/src/path_helpers.rs
@@ -84,3 +84,18 @@ pub fn has_suffix<P: AsRef<Path>>(path: P, suffix: &str) -> bool {
 pub fn filename_contains<P: AsRef<Path>>(path: P, needle: &str) -> bool {
     path.as_ref().file_name().is_some_and(|name| name.to_str().unwrap().contains(needle))
 }
+
+/// Helper for reading entries in a given directory and its children.
+pub fn read_dir_entries_recursive<P: AsRef<Path>, F: FnMut(&Path)>(dir: P, mut callback: F) {
+    fn read_dir_entries_recursive_inner<P: AsRef<Path>, F: FnMut(&Path)>(dir: P, callback: &mut F) {
+        for entry in rfs::read_dir(dir) {
+            let path = entry.unwrap().path();
+            callback(&path);
+            if path.is_dir() {
+                read_dir_entries_recursive_inner(path, callback);
+            }
+        }
+    }
+
+    read_dir_entries_recursive_inner(dir, &mut callback);
+}
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 7c481958d1a..f406666ae5a 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/display.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/display.rs
@@ -1462,7 +1462,7 @@ fn generic_args_sans_defaults<'ga>(
                     // otherwise, if the arg is equal to the param default, hide it (unless the
                     // default is an error which can happen for the trait Self type)
                     #[allow(unstable_name_collisions)]
-                    default_parameters.get(i).is_none_or(|default_parameter| {
+                    IsNoneOr::is_none_or(default_parameters.get(i), |default_parameter| {
                         // !is_err(default_parameter.skip_binders())
                         //     &&
                         arg != &default_parameter.clone().substitute(Interner, &parameters)
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/lib.rs b/src/tools/rust-analyzer/crates/hir-ty/src/lib.rs
index 4c9e0a1e118..21c84511dc3 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/lib.rs
@@ -15,8 +15,10 @@ extern crate rustc_abi;
 #[cfg(not(feature = "in-rust-tree"))]
 extern crate ra_ap_rustc_abi as rustc_abi;
 
-// Use the crates.io version unconditionally until the API settles enough that we can switch to
-// using the in-tree one.
+#[cfg(feature = "in-rust-tree")]
+extern crate rustc_pattern_analysis;
+
+#[cfg(not(feature = "in-rust-tree"))]
 extern crate ra_ap_rustc_pattern_analysis as rustc_pattern_analysis;
 
 mod builder;
diff --git a/src/tools/rustbook/Cargo.lock b/src/tools/rustbook/Cargo.lock
index df051ed447e..3b859fe98c5 100644
--- a/src/tools/rustbook/Cargo.lock
+++ b/src/tools/rustbook/Cargo.lock
@@ -304,6 +304,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "doc-comment"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fea41bba32d969b513997752735605054bc0dfa92b4c56bf1189f2e174be7a10"
+
+[[package]]
 name = "elasticlunr-rs"
 version = "3.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -466,6 +472,21 @@ dependencies = [
 ]
 
 [[package]]
+name = "html_parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6f56db07b6612644f6f7719f8ef944f75fff9d6378fdf3d316fd32194184abd"
+dependencies = [
+ "doc-comment",
+ "pest",
+ "pest_derive",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "thiserror",
+]
+
+[[package]]
 name = "humantime"
 version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -680,13 +701,13 @@ name = "mdbook-trpl-listing"
 version = "0.1.0"
 dependencies = [
  "clap",
+ "html_parser",
  "mdbook",
  "pulldown-cmark",
  "pulldown-cmark-to-cmark",
  "serde_json",
  "thiserror",
  "toml 0.8.14",
- "xmlparser",
 ]
 
 [[package]]
@@ -1768,12 +1789,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "xmlparser"
-version = "0.13.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "66fee0b777b0f5ac1c69bb06d361268faafa61cd4682ae064a171c16c433e9e4"
-
-[[package]]
 name = "yaml-rust"
 version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/src/tools/rustfmt/src/parse/macros/mod.rs b/src/tools/rustfmt/src/parse/macros/mod.rs
index 60c827fd03b..8d5f7f90958 100644
--- a/src/tools/rustfmt/src/parse/macros/mod.rs
+++ b/src/tools/rustfmt/src/parse/macros/mod.rs
@@ -84,9 +84,7 @@ pub(crate) struct ParsedMacroArgs {
 fn check_keyword<'a, 'b: 'a>(parser: &'a mut Parser<'b>) -> Option<MacroArg> {
     for &keyword in RUST_KW.iter() {
         if parser.token.is_keyword(keyword)
-            && parser.look_ahead(1, |t| {
-                t.kind == TokenKind::Eof || t.kind == TokenKind::Comma
-            })
+            && parser.look_ahead(1, |t| *t == TokenKind::Eof || *t == TokenKind::Comma)
         {
             parser.bump();
             return Some(MacroArg::Keyword(
@@ -131,7 +129,7 @@ pub(crate) fn parse_macro_args(
                                 Some(arg) => {
                                     args.push(arg);
                                     parser.bump();
-                                    if parser.token.kind == TokenKind::Eof && args.len() == 2 {
+                                    if parser.token == TokenKind::Eof && args.len() == 2 {
                                         vec_with_semi = true;
                                         break;
                                     }
@@ -150,7 +148,7 @@ pub(crate) fn parse_macro_args(
 
             parser.bump();
 
-            if parser.token.kind == TokenKind::Eof {
+            if parser.token == TokenKind::Eof {
                 trailing_comma = true;
                 break;
             }
diff --git a/src/tools/tidy/src/allowed_run_make_makefiles.txt b/src/tools/tidy/src/allowed_run_make_makefiles.txt
index bc446555773..f55abb513b8 100644
--- a/src/tools/tidy/src/allowed_run_make_makefiles.txt
+++ b/src/tools/tidy/src/allowed_run_make_makefiles.txt
@@ -1,21 +1,13 @@
 run-make/branch-protection-check-IBT/Makefile
 run-make/cat-and-grep-sanity-check/Makefile
-run-make/dep-info-doesnt-run-much/Makefile
-run-make/dep-info-spaces/Makefile
-run-make/dep-info/Makefile
 run-make/emit-to-stdout/Makefile
 run-make/extern-fn-reachable/Makefile
 run-make/incr-add-rust-src-component/Makefile
 run-make/issue-84395-lto-embed-bitcode/Makefile
 run-make/jobserver-error/Makefile
 run-make/libs-through-symlinks/Makefile
-run-make/libtest-json/Makefile
-run-make/libtest-junit/Makefile
 run-make/libtest-thread-limit/Makefile
 run-make/macos-deployment-target/Makefile
-run-make/native-link-modifier-bundle/Makefile
-run-make/reproducible-build/Makefile
-run-make/rlib-format-packed-bundled-libs/Makefile
 run-make/split-debuginfo/Makefile
 run-make/symbol-mangling-hashed/Makefile
 run-make/translation/Makefile