Merge from rustc

24 files changed, 236 insertions, 124 deletions

diff --git a/src/bootstrap/bootstrap.py b/src/bootstrap/bootstrap.py
index 5b19a658fb5..c298817895c 100644
--- a/src/bootstrap/bootstrap.py
+++ b/src/bootstrap/bootstrap.py
@@ -87,14 +87,16 @@ def _download(path, url, probably_big, verbose, exception):
         # If curl is not present on Win32, we should not sys.exit
         #   but raise `CalledProcessError` or `OSError` instead
         require(["curl", "--version"], exception=platform_is_win32)
-        run(["curl", option,
-             "-L", # Follow redirect.
-             "-y", "30", "-Y", "10",    # timeout if speed is < 10 bytes/sec for > 30 seconds
-             "--connect-timeout", "30",  # timeout if cannot connect within 30 seconds
-             "--retry", "3", "-Sf", "-o", path, url],
-            verbose=verbose,
-            exception=True, # Will raise RuntimeError on failure
-        )
+        with open(path, "wb") as outfile:
+            run(["curl", option,
+                "-L", # Follow redirect.
+                "-y", "30", "-Y", "10",    # timeout if speed is < 10 bytes/sec for > 30 seconds
+                "--connect-timeout", "30",  # timeout if cannot connect within 30 seconds
+                "--retry", "3", "-Sf", url],
+                stdout=outfile,    #Implements cli redirect operator '>'
+                verbose=verbose,
+                exception=True, # Will raise RuntimeError on failure
+            )
     except (subprocess.CalledProcessError, OSError, RuntimeError):
         # see http://serverfault.com/questions/301128/how-to-download
         if platform_is_win32:
diff --git a/src/bootstrap/setup.rs b/src/bootstrap/setup.rs
index 004601cb68b..2b613ad50ee 100644
--- a/src/bootstrap/setup.rs
+++ b/src/bootstrap/setup.rs
@@ -1,6 +1,7 @@
 use crate::builder::{Builder, RunConfig, ShouldRun, Step};
 use crate::Config;
 use crate::{t, VERSION};
+use sha2::Digest;
 use std::env::consts::EXE_SUFFIX;
 use std::fmt::Write as _;
 use std::fs::File;
@@ -10,6 +11,9 @@ use std::process::Command;
 use std::str::FromStr;
 use std::{fmt, fs, io};
 
+#[cfg(test)]
+mod tests;
+
 #[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
 pub enum Profile {
     Compiler,
@@ -19,6 +23,15 @@ pub enum Profile {
     User,
 }
 
+/// A list of historical hashes of `src/etc/vscode_settings.json`.
+/// New entries should be appended whenever this is updated so we can detect
+/// outdated vs. user-modified settings files.
+static SETTINGS_HASHES: &[&str] = &[
+    "ea67e259dedf60d4429b6c349a564ffcd1563cf41c920a856d1f5b16b4701ac8",
+    "56e7bf011c71c5d81e0bf42e84938111847a810eee69d906bba494ea90b51922",
+];
+static VSCODE_SETTINGS: &str = include_str!("../etc/vscode_settings.json");
+
 impl Profile {
     fn include_path(&self, src_path: &Path) -> PathBuf {
         PathBuf::from(format!("{}/src/bootstrap/defaults/config.{}.toml", src_path.display(), self))
@@ -155,6 +168,7 @@ pub fn setup(config: &Config, profile: Profile) {
 
     if !config.dry_run() {
         t!(install_git_hook_maybe(&config));
+        t!(create_vscode_settings_maybe(&config));
     }
 
     println!();
@@ -351,6 +365,34 @@ pub fn interactive_path() -> io::Result<Profile> {
     Ok(template)
 }
 
+#[derive(PartialEq)]
+enum PromptResult {
+    Yes,   // y/Y/yes
+    No,    // n/N/no
+    Print, // p/P/print
+}
+
+/// Prompt a user for a answer, looping until they enter an accepted input or nothing
+fn prompt_user(prompt: &str) -> io::Result<Option<PromptResult>> {
+    let mut input = String::new();
+    loop {
+        print!("{prompt} ");
+        io::stdout().flush()?;
+        input.clear();
+        io::stdin().read_line(&mut input)?;
+        match input.trim().to_lowercase().as_str() {
+            "y" | "yes" => return Ok(Some(PromptResult::Yes)),
+            "n" | "no" => return Ok(Some(PromptResult::No)),
+            "p" | "print" => return Ok(Some(PromptResult::Print)),
+            "" => return Ok(None),
+            _ => {
+                eprintln!("error: unrecognized option '{}'", input.trim());
+                eprintln!("note: press Ctrl+C to exit");
+            }
+        };
+    }
+}
+
 // install a git hook to automatically run tidy, if they want
 fn install_git_hook_maybe(config: &Config) -> io::Result<()> {
     let git = t!(config.git().args(&["rev-parse", "--git-common-dir"]).output().map(|output| {
@@ -363,43 +405,98 @@ fn install_git_hook_maybe(config: &Config) -> io::Result<()> {
         return Ok(());
     }
 
-    let mut input = String::new();
-    println!();
     println!(
-        "Rust's CI will automatically fail if it doesn't pass `tidy`, the internal tool for ensuring code quality.
+        "\nRust's CI will automatically fail if it doesn't pass `tidy`, the internal tool for ensuring code quality.
 If you'd like, x.py can install a git hook for you that will automatically run `test tidy` before
 pushing your code to ensure your code is up to par. If you decide later that this behavior is
 undesirable, simply delete the `pre-push` file from .git/hooks."
     );
 
-    let should_install = loop {
-        print!("Would you like to install the git hook?: [y/N] ");
-        io::stdout().flush()?;
-        input.clear();
-        io::stdin().read_line(&mut input)?;
-        break match input.trim().to_lowercase().as_str() {
-            "y" | "yes" => true,
-            "n" | "no" | "" => false,
-            _ => {
-                eprintln!("error: unrecognized option '{}'", input.trim());
-                eprintln!("note: press Ctrl+C to exit");
-                continue;
-            }
-        };
-    };
-
-    if should_install {
-        let src = config.src.join("src").join("etc").join("pre-push.sh");
-        match fs::hard_link(src, &dst) {
-            Err(e) => eprintln!(
+    if prompt_user("Would you like to install the git hook?: [y/N]")? != Some(PromptResult::Yes) {
+        println!("Ok, skipping installation!");
+        return Ok(());
+    }
+    let src = config.src.join("src").join("etc").join("pre-push.sh");
+    match fs::hard_link(src, &dst) {
+        Err(e) => {
+            eprintln!(
                 "error: could not create hook {}: do you already have the git hook installed?\n{}",
                 dst.display(),
                 e
-            ),
-            Ok(_) => println!("Linked `src/etc/pre-push.sh` to `.git/hooks/pre-push`"),
+            );
+            return Err(e);
+        }
+        Ok(_) => println!("Linked `src/etc/pre-push.sh` to `.git/hooks/pre-push`"),
+    };
+    Ok(())
+}
+
+/// Create a `.vscode/settings.json` file for rustc development, or just print it
+fn create_vscode_settings_maybe(config: &Config) -> io::Result<()> {
+    let (current_hash, historical_hashes) = SETTINGS_HASHES.split_last().unwrap();
+    let vscode_settings = config.src.join(".vscode").join("settings.json");
+    // If None, no settings.json exists
+    // If Some(true), is a previous version of settings.json
+    // If Some(false), is not a previous version (i.e. user modified)
+    // If it's up to date we can just skip this
+    let mut mismatched_settings = None;
+    if let Ok(current) = fs::read_to_string(&vscode_settings) {
+        let mut hasher = sha2::Sha256::new();
+        hasher.update(&current);
+        let hash = hex::encode(hasher.finalize().as_slice());
+        if hash == *current_hash {
+            return Ok(());
+        } else if historical_hashes.contains(&hash.as_str()) {
+            mismatched_settings = Some(true);
+        } else {
+            mismatched_settings = Some(false);
+        }
+    }
+    println!(
+        "\nx.py can automatically install the recommended `.vscode/settings.json` file for rustc development"
+    );
+    match mismatched_settings {
+        Some(true) => eprintln!(
+            "warning: existing `.vscode/settings.json` is out of date, x.py will update it"
+        ),
+        Some(false) => eprintln!(
+            "warning: existing `.vscode/settings.json` has been modified by user, x.py will back it up and replace it"
+        ),
+        _ => (),
+    }
+    let should_create = match prompt_user(
+        "Would you like to create/update `settings.json`, or only print suggested settings?: [y/p/N]",
+    )? {
+        Some(PromptResult::Yes) => true,
+        Some(PromptResult::Print) => false,
+        _ => {
+            println!("Ok, skipping settings!");
+            return Ok(());
+        }
+    };
+    if should_create {
+        let path = config.src.join(".vscode");
+        if !path.exists() {
+            fs::create_dir(&path)?;
+        }
+        let verb = match mismatched_settings {
+            // exists but outdated, we can replace this
+            Some(true) => "Updated",
+            // exists but user modified, back it up
+            Some(false) => {
+                // exists and is not current version or outdated, so back it up
+                let mut backup = vscode_settings.clone();
+                backup.set_extension("bak");
+                eprintln!("warning: copying `settings.json` to `settings.json.bak`");
+                fs::copy(&vscode_settings, &backup)?;
+                "Updated"
+            }
+            _ => "Created",
         };
+        fs::write(&vscode_settings, &VSCODE_SETTINGS)?;
+        println!("{verb} `.vscode/settings.json`");
     } else {
-        println!("Ok, skipping installation!");
+        println!("\n{VSCODE_SETTINGS}");
     }
     Ok(())
 }
diff --git a/src/bootstrap/setup/tests.rs b/src/bootstrap/setup/tests.rs
new file mode 100644
index 00000000000..dcf9d18e632
--- /dev/null
+++ b/src/bootstrap/setup/tests.rs
@@ -0,0 +1,14 @@
+use super::{SETTINGS_HASHES, VSCODE_SETTINGS};
+use sha2::Digest;
+
+#[test]
+fn check_matching_settings_hash() {
+    let mut hasher = sha2::Sha256::new();
+    hasher.update(&VSCODE_SETTINGS);
+    let hash = hex::encode(hasher.finalize().as_slice());
+    assert_eq!(
+        &hash,
+        SETTINGS_HASHES.last().unwrap(),
+        "Update `SETTINGS_HASHES` with the new hash of `src/etc/vscode_settings.json`"
+    );
+}
diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index 6078e39ac9d..8a0c532cfb0 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -1114,9 +1114,6 @@ impl Step for Tidy {
             cmd.arg("--bless");
         }
 
-        builder.info("tidy check");
-        try_run(builder, &mut cmd);
-
         if builder.config.channel == "dev" || builder.config.channel == "nightly" {
             builder.info("fmt check");
             if builder.initial_rustfmt().is_none() {
@@ -1134,6 +1131,11 @@ help: to skip test's attempt to check tidiness, pass `--exclude src/tools/tidy`
             }
             crate::format::format(&builder, !builder.config.cmd.bless(), &[]);
         }
+
+        builder.info("tidy check");
+        try_run(builder, &mut cmd);
+
+        builder.ensure(ExpandYamlAnchors {});
     }
 
     fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
diff --git a/src/ci/github-actions/ci.yml b/src/ci/github-actions/ci.yml
index c0a1341ebca..3c128c0ca25 100644
--- a/src/ci/github-actions/ci.yml
+++ b/src/ci/github-actions/ci.yml
@@ -307,8 +307,6 @@ jobs:
           - name: x86_64-gnu-tools
             <<: *job-linux-xl
             tidy: false
-            env:
-              CI_ONLY_WHEN_SUBMODULES_CHANGED: 1
 
   auto:
     permissions:
diff --git a/src/ci/scripts/should-skip-this.sh b/src/ci/scripts/should-skip-this.sh
index 85d77225380..48127166ad0 100755
--- a/src/ci/scripts/should-skip-this.sh
+++ b/src/ci/scripts/should-skip-this.sh
@@ -1,46 +1,11 @@
 #!/bin/bash
-# Set the SKIP_JOB environment variable if this job is supposed to only run
-# when submodules are updated and they were not. The following time consuming
-# tasks will be skipped when the environment variable is present.
+# Set the SKIP_JOB environment variable if this job is not supposed to run on the current builder.
 
 set -euo pipefail
 IFS=$'\n\t'
 
 source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
 
-if [[ -n "${CI_ONLY_WHEN_SUBMODULES_CHANGED-}" ]]; then
-    git fetch "https://github.com/$GITHUB_REPOSITORY" "$GITHUB_BASE_REF"
-    BASE_COMMIT="$(git merge-base FETCH_HEAD HEAD)"
-
-    echo "Searching for toolstate changes between $BASE_COMMIT and $(git rev-parse HEAD)"
-
-    if git diff "$BASE_COMMIT" | grep --quiet "^index .* 160000"; then
-        # Submodules pseudo-files inside git have the 160000 permissions, so when
-        # those files are present in the diff a submodule was updated.
-        echo "Submodules were updated"
-    elif ! (git diff --quiet "$BASE_COMMIT" -- \
-             src/tools/clippy src/tools/rustfmt src/tools/miri \
-             library/std/src/sys); then
-        # There is not an easy blanket search for subtrees. For now, manually list
-        # the subtrees.
-        # Also run this when the platform-specific parts of std change, in case
-        # that breaks Miri.
-        echo "Tool subtrees were updated"
-    elif ! (git diff --quiet "$BASE_COMMIT" -- \
-             tests/rustdoc-gui \
-             src/librustdoc \
-             src/ci/docker/host-x86_64/x86_64-gnu-tools/Dockerfile \
-             src/ci/docker/host-x86_64/x86_64-gnu-tools/browser-ui-test.version \
-             src/tools/rustdoc-gui); then
-        # There was a change in either rustdoc or in its GUI tests.
-        echo "Rustdoc was updated"
-    else
-        echo "Not executing this job since no submodules nor subtrees were updated"
-        ciCommandSetEnv SKIP_JOB 1
-        exit 0
-    fi
-fi
-
 if [[ -n "${CI_ONLY_WHEN_CHANNEL-}" ]]; then
     if [[ "${CI_ONLY_WHEN_CHANNEL}" = "$(cat src/ci/channel)" ]]; then
         echo "The channel is the expected one"
diff --git a/src/doc/rustc/book.toml b/src/doc/rustc/book.toml
index 372350403e2..cea6033ede2 100644
--- a/src/doc/rustc/book.toml
+++ b/src/doc/rustc/book.toml
@@ -5,3 +5,4 @@ title = "The rustc book"
 
 [output.html]
 git-repository-url = "https://github.com/rust-lang/rust/tree/master/src/doc/rustc"
+edit-url-template = "https://github.com/rust-lang/rust/edit/master/src/doc/rustc/{path}"
diff --git a/src/doc/rustc/src/codegen-options/index.md b/src/doc/rustc/src/codegen-options/index.md
index 7e355b7fccf..1770c121a0e 100644
--- a/src/doc/rustc/src/codegen-options/index.md
+++ b/src/doc/rustc/src/codegen-options/index.md
@@ -562,7 +562,7 @@ Supported values for this option are:
 * `v0` — The "v0" mangling scheme. The specific format is not specified at
   this time.
 
-The default if not specified will use a compiler-chosen default which may
+The default, if not specified, will use a compiler-chosen default which may
 change in the future.
 
 [name mangling]: https://en.wikipedia.org/wiki/Name_mangling
diff --git a/src/doc/unstable-book/src/library-features/char-error-internals.md b/src/doc/unstable-book/src/library-features/char-error-internals.md
deleted file mode 100644
index 8013b4988e1..00000000000
--- a/src/doc/unstable-book/src/library-features/char-error-internals.md
+++ /dev/null
@@ -1,5 +0,0 @@
-# `char_error_internals`
-
-This feature is internal to the Rust compiler and is not intended for general use.
-
-------------------------
diff --git a/src/doc/unstable-book/src/library-features/int-error-internals.md b/src/doc/unstable-book/src/library-features/int-error-internals.md
deleted file mode 100644
index 402e4fa5ef6..00000000000
--- a/src/doc/unstable-book/src/library-features/int-error-internals.md
+++ /dev/null
@@ -1,5 +0,0 @@
-# `int_error_internals`
-
-This feature is internal to the Rust compiler and is not intended for general use.
-
-------------------------
diff --git a/src/etc/vscode_settings.json b/src/etc/vscode_settings.json
new file mode 100644
index 00000000000..04c34ce91c0
--- /dev/null
+++ b/src/etc/vscode_settings.json
@@ -0,0 +1,28 @@
+{
+    "rust-analyzer.check.invocationLocation": "root",
+    "rust-analyzer.check.invocationStrategy": "once",
+    "rust-analyzer.checkOnSave.overrideCommand": [
+        "python3",
+        "x.py",
+        "check",
+        "--json-output"
+    ],
+    "rust-analyzer.linkedProjects": ["src/bootstrap/Cargo.toml", "Cargo.toml"],
+    "rust-analyzer.rustfmt.overrideCommand": [
+        "./build/host/rustfmt/bin/rustfmt",
+        "--edition=2021"
+    ],
+    "rust-analyzer.procMacro.server": "./build/host/stage0/libexec/rust-analyzer-proc-macro-srv",
+    "rust-analyzer.procMacro.enable": true,
+    "rust-analyzer.cargo.buildScripts.enable": true,
+    "rust-analyzer.cargo.buildScripts.invocationLocation": "root",
+    "rust-analyzer.cargo.buildScripts.invocationStrategy": "once",
+    "rust-analyzer.cargo.buildScripts.overrideCommand": [
+        "python3",
+        "x.py",
+        "check",
+        "--json-output"
+    ],
+    "rust-analyzer.cargo.sysroot": "./build/host/stage0-sysroot",
+    "rust-analyzer.rustc.source": "./Cargo.toml"
+}
diff --git a/src/librustdoc/html/format.rs b/src/librustdoc/html/format.rs
index a59cfbea885..8a7a8ea5fd1 100644
--- a/src/librustdoc/html/format.rs
+++ b/src/librustdoc/html/format.rs
@@ -289,7 +289,7 @@ pub(crate) fn print_where_clause<'a, 'tcx: 'a>(
                 if f.alternate() {
                     f.write_str(" ")?;
                 } else {
-                    f.write_str("<br>")?;
+                    f.write_str("\n")?;
                 }
 
                 match pred {
@@ -352,7 +352,7 @@ pub(crate) fn print_where_clause<'a, 'tcx: 'a>(
             }
         } else {
             let mut br_with_padding = String::with_capacity(6 * indent + 28);
-            br_with_padding.push_str("<br>");
+            br_with_padding.push_str("\n");
 
             let padding_amout =
                 if ending == Ending::Newline { indent + 4 } else { indent + "fn where ".len() };
@@ -360,16 +360,16 @@ pub(crate) fn print_where_clause<'a, 'tcx: 'a>(
             for _ in 0..padding_amout {
                 br_with_padding.push_str(" ");
             }
-            let where_preds = where_preds.to_string().replace("<br>", &br_with_padding);
+            let where_preds = where_preds.to_string().replace("\n", &br_with_padding);
 
             if ending == Ending::Newline {
                 let mut clause = " ".repeat(indent.saturating_sub(1));
                 write!(clause, "<span class=\"where fmt-newline\">where{where_preds},</span>")?;
                 clause
             } else {
-                // insert a <br> tag after a single space but before multiple spaces at the start
+                // insert a newline after a single space but before multiple spaces at the start
                 if indent == 0 {
-                    format!("<br><span class=\"where\">where{where_preds}</span>")
+                    format!("\n<span class=\"where\">where{where_preds}</span>")
                 } else {
                     // put the first one on the same line as the 'where' keyword
                     let where_preds = where_preds.replacen(&br_with_padding, " ", 1);
@@ -1315,7 +1315,8 @@ impl clean::FnDecl {
 
     /// * `header_len`: The length of the function header and name. In other words, the number of
     ///   characters in the function declaration up to but not including the parentheses.
-    ///   <br>Used to determine line-wrapping.
+    ///   This is expected to go into a `<pre>`/`code-header` block, so indentation and newlines
+    ///   are preserved.
     /// * `indent`: The number of spaces to indent each successive line with, if line-wrapping is
     ///   necessary.
     pub(crate) fn full_print<'a, 'tcx: 'a>(
@@ -1363,7 +1364,7 @@ impl clean::FnDecl {
                 }
             } else {
                 if i > 0 {
-                    args.push_str("<br>");
+                    args.push_str("\n");
                 }
                 if input.is_const {
                     args.push_str("const ");
@@ -1389,7 +1390,7 @@ impl clean::FnDecl {
         let mut args = args.into_inner();
 
         if self.c_variadic {
-            args.push_str(",<br> ...");
+            args.push_str(",\n ...");
             args_plain.push_str(", ...");
         }
 
@@ -1399,24 +1400,20 @@ impl clean::FnDecl {
 
         let declaration_len = header_len + args_plain.len() + arrow_plain.len();
         let output = if declaration_len > 80 {
-            let full_pad = format!("<br>{}", " ".repeat(indent + 4));
-            let close_pad = format!("<br>{}", " ".repeat(indent));
+            let full_pad = format!("\n{}", " ".repeat(indent + 4));
+            let close_pad = format!("\n{}", " ".repeat(indent));
             format!(
                 "({pad}{args}{close}){arrow}",
                 pad = if self.inputs.values.is_empty() { "" } else { &full_pad },
-                args = args.replace("<br>", &full_pad),
+                args = args.replace("\n", &full_pad),
                 close = close_pad,
                 arrow = arrow
             )
         } else {
-            format!("({args}){arrow}", args = args.replace("<br>", " "), arrow = arrow)
+            format!("({args}){arrow}", args = args.replace("\n", " "), arrow = arrow)
         };
 
-        if f.alternate() {
-            write!(f, "{}", output.replace("<br>", "\n"))
-        } else {
-            write!(f, "{}", output)
-        }
+        write!(f, "{}", output)
     }
 }
 
diff --git a/src/librustdoc/html/static/images/wheel.svg b/src/librustdoc/html/static/images/wheel.svg
index 01da3b24c7c..83c07f63d10 100644
--- a/src/librustdoc/html/static/images/wheel.svg
+++ b/src/librustdoc/html/static/images/wheel.svg
@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="Capa_1" width="27.434" height="29.5" enable-background="new 0 0 27.434 29.5" version="1.1" viewBox="0 0 27.434 29.5" xml:space="preserve"><g><path d="M27.315,18.389c-0.165-0.604-0.509-1.113-0.981-1.459c-0.042-0.144-0.083-0.429-0.015-0.761l0.037-0.177v-0.182V14.8 c0-1.247-0.006-1.277-0.048-1.472c-0.076-0.354-0.035-0.653,0.007-0.803c0.477-0.346,0.828-0.861,0.996-1.476 c0.261-0.956,0.076-2.091-0.508-3.114l-0.591-1.032c-0.746-1.307-1.965-2.119-3.182-2.119c-0.378,0-0.75,0.081-1.085,0.235 c-0.198-0.025-0.554-0.15-0.855-0.389l-0.103-0.082l-0.114-0.065l-1.857-1.067L18.92,3.36l-0.105-0.044 c-0.376-0.154-0.658-0.41-0.768-0.556C17.918,1.172,16.349,0,14.296,0H13.14c-2.043,0-3.608,1.154-3.749,2.721 C9.277,2.862,8.999,3.104,8.633,3.25l-0.1,0.039L8.439,3.341L6.495,4.406L6.363,4.479L6.245,4.573 C5.936,4.82,5.596,4.944,5.416,4.977c-0.314-0.139-0.66-0.21-1.011-0.21c-1.198,0-2.411,0.819-3.165,2.139L0.65,7.938 c-0.412,0.72-0.642,1.521-0.644,2.258c-0.003,0.952,0.362,1.756,1.013,2.256c0.034,0.155,0.061,0.448-0.016,0.786 c-0.038,0.168-0.062,0.28-0.062,1.563c0,1.148,0,1.148,0.015,1.262l0.009,0.073l0.017,0.073c0.073,0.346,0.045,0.643,0.011,0.802 C0.348,17.512-0.01,18.314,0,19.268c0.008,0.729,0.238,1.523,0.648,2.242l0.589,1.031c0.761,1.331,1.967,2.159,3.15,2.159 c0.324,0,0.645-0.064,0.938-0.187c0.167,0.038,0.492,0.156,0.813,0.416l0.11,0.088l0.124,0.07l2.045,1.156l0.102,0.057l0.107,0.043 c0.364,0.147,0.646,0.381,0.766,0.521c0.164,1.52,1.719,2.634,3.745,2.634h1.155c2.037,0,3.598-1.134,3.747-2.675 c0.117-0.145,0.401-0.393,0.774-0.549l0.111-0.047l0.105-0.062l1.96-1.159l0.105-0.062l0.097-0.075 c0.309-0.246,0.651-0.371,0.832-0.402c0.313,0.138,0.662,0.212,1.016,0.212c1.199,0,2.412-0.82,3.166-2.139l0.59-1.032 C27.387,20.48,27.575,19.342,27.315,18.389z M25.274,20.635l-0.59,1.032c-0.438,0.765-1.104,1.251-1.639,1.251 c-0.133,0-0.258-0.029-0.369-0.094c-0.15-0.086-0.346-0.127-0.566-0.127c-0.596,0-1.383,0.295-2.01,0.796l-1.96,1.157 c-1.016,0.425-1.846,1.291-1.846,1.929s-0.898,1.159-1.998,1.159H13.14c-1.1,0-1.998-0.514-1.998-1.141s-0.834-1.477-1.854-1.888 l-2.046-1.157c-0.636-0.511-1.425-0.814-2.006-0.814c-0.202,0-0.379,0.037-0.516,0.115c-0.101,0.057-0.214,0.084-0.333,0.084 c-0.518,0-1.179-0.498-1.62-1.271l-0.591-1.032c-0.545-0.954-0.556-1.983-0.024-2.286c0.532-0.305,0.78-1.432,0.551-2.506 c0,0,0-0.003,0-1.042c0-1.088,0.021-1.18,0.021-1.18c0.238-1.072-0.01-2.203-0.552-2.513C1.631,10.8,1.634,9.765,2.18,8.812 L2.769,7.78c0.438-0.766,1.103-1.251,1.636-1.251c0.131,0,0.255,0.029,0.365,0.092C4.92,6.707,5.114,6.747,5.334,6.747 c0.596,0,1.38-0.296,2.007-0.795l1.944-1.065c1.021-0.407,1.856-1.277,1.856-1.933c0-0.656,0.898-1.192,1.998-1.192h1.156V1.761 c1.1,0,1.998,0.545,1.998,1.211c0,0.667,0.832,1.554,1.849,1.973L20,6.013c0.618,0.489,1.401,0.775,2.012,0.775 c0.24,0,0.454-0.045,0.62-0.139c0.122-0.069,0.259-0.102,0.403-0.102c0.551,0,1.221,0.476,1.653,1.231l0.59,1.032 c0.544,0.953,0.518,2.004-0.062,2.334c-0.577,0.331-0.859,1.48-0.627,2.554c0,0,0.01,0.042,0.01,1.103c0,1.012,0,1.012,0,1.012 c-0.218,1.049,0.068,2.174,0.636,2.498C25.802,18.635,25.819,19.68,25.274,20.635z"/><path d="M13.61,7.611c-3.913,0-7.084,3.173-7.084,7.085c0,3.914,3.171,7.085,7.084,7.085s7.085-3.172,7.085-7.085 C20.695,10.784,17.523,7.611,13.61,7.611z M13.61,20.02c-2.936,0-5.323-2.388-5.323-5.323c0-2.935,2.388-5.323,5.323-5.323 s5.324,2.388,5.324,5.323C18.934,17.632,16.546,20.02,13.61,20.02z"/><path d="M13.682,9.908c-2.602,0-4.718,2.116-4.718,4.718c0,2.601,2.116,4.716,4.718,4.716c2.601,0,4.717-2.115,4.717-4.716 C18.399,12.024,16.283,9.908,13.682,9.908z M13.682,17.581c-1.633,0-2.956-1.323-2.956-2.955s1.323-2.956,2.956-2.956 c1.632,0,2.956,1.324,2.956,2.956S15.314,17.581,13.682,17.581z"/></g></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" width="27.434" height="29.5" enable-background="new 0 0 27.434 29.5" viewBox="0 0 27.434 29.5"><path d="M27.316 18.39a2.696 2.696 0 0 0-.98-1.46 1.62 1.62 0 0 1-.016-.762l.035-.176v-1.191c0-1.246-.003-1.278-.046-1.473a1.717 1.717 0 0 1 .007-.805c.477-.343.829-.859.997-1.472.257-.957.074-2.094-.508-3.117l-.594-1.032c-.746-1.304-1.965-2.117-3.18-2.117-.379 0-.75.078-1.086.235a1.958 1.958 0 0 1-.855-.391l-.102-.082-.117-.063-1.855-1.07-.094-.055-.106-.043c-.378-.156-.66-.41-.77-.554C17.919 1.172 16.349 0 14.297 0h-1.155c-2.043 0-3.61 1.152-3.75 2.723-.114.14-.391.382-.758.527l-.102.04-.094.05-1.94 1.066-.134.074-.117.094a2.019 2.019 0 0 1-.832.403 2.518 2.518 0 0 0-1.008-.211c-1.199 0-2.414.82-3.168 2.14l-.59 1.032c-.41.718-.64 1.523-.64 2.257-.004.953.36 1.758 1.012 2.258.035.152.058.445-.016.785-.04.168-.063.282-.063 1.563 0 1.148 0 1.148.016 1.261l.008.075.015.074c.075.344.047.64.012.8-.644.5-1.004 1.302-.992 2.259.008.726.238 1.52.648 2.242l.59 1.027c.758 1.332 1.965 2.16 3.149 2.16.324 0 .644-.062.937-.187.168.039.492.156.813.418l.11.086.124.07 2.047 1.156.102.059.105.043c.363.144.648.379.766.52.164 1.519 1.718 2.632 3.746 2.632h1.156c2.035 0 3.598-1.133 3.746-2.672.117-.144.402-.394.773-.55l.114-.047.101-.063 1.961-1.156.106-.063.097-.078c.309-.246.653-.37.832-.398.313.136.66.21 1.016.21 1.2 0 2.41-.82 3.164-2.14l.594-1.031c.59-1.028.777-2.164.52-3.117Zm-2.043 2.247-.59 1.031c-.437.766-1.105 1.25-1.636 1.25a.7.7 0 0 1-.371-.094 1.146 1.146 0 0 0-.567-.129c-.593 0-1.382.297-2.007.797l-1.961 1.156c-1.016.426-1.848 1.293-1.848 1.93 0 .64-.898 1.16-1.996 1.16H13.14c-1.102 0-2-.515-2-1.14 0-.63-.832-1.477-1.852-1.887l-2.047-1.16c-.637-.512-1.426-.813-2.008-.813-.199 0-.379.035-.515.114a.648.648 0 0 1-.332.085c-.52 0-1.18-.5-1.621-1.273l-.59-1.031c-.543-.953-.555-1.98-.024-2.285.532-.305.782-1.434.551-2.504V14.8c0-1.09.02-1.18.02-1.18.238-1.074-.008-2.203-.551-2.516-.54-.304-.54-1.34.008-2.293l.59-1.03c.437-.766 1.101-1.255 1.636-1.255a.73.73 0 0 1 .364.094c.152.086.343.125.566.125.594 0 1.379-.297 2.004-.793l1.945-1.066c1.02-.407 1.856-1.278 1.856-1.934 0-.656.898-1.191 2-1.191h1.156c1.098 0 1.996.543 1.996 1.21 0 .669.832 1.555 1.848 1.973L20 6.012c.617.492 1.402.777 2.012.777.242 0 .453-.047.62-.14a.79.79 0 0 1 .403-.102c.55 0 1.223.476 1.652 1.23l.59 1.032c.543.953.52 2.004-.062 2.336-.574.332-.86 1.48-.625 2.554 0 0 .008.04.008 1.102v1.011c-.215 1.051.07 2.176.636 2.5.567.325.586 1.368.04 2.325Zm0 0"/><path d="M13.61 7.61a7.084 7.084 0 0 0-7.083 7.085 7.085 7.085 0 1 0 14.168 0A7.088 7.088 0 0 0 13.61 7.61Zm0 12.41a5.33 5.33 0 0 1-5.325-5.325 5.33 5.33 0 0 1 5.324-5.32 5.327 5.327 0 0 1 5.325 5.32 5.328 5.328 0 0 1-5.325 5.325Zm0 0"/><path d="M13.684 9.906a4.722 4.722 0 0 0-4.72 4.719 4.722 4.722 0 0 0 4.72 4.719 4.724 4.724 0 0 0 4.714-4.719 4.724 4.724 0 0 0-4.714-4.719Zm0 7.676a2.954 2.954 0 1 1 0-5.91 2.953 2.953 0 0 1 2.953 2.953 2.957 2.957 0 0 1-2.953 2.957Zm0 0"/></svg>
\ No newline at end of file
diff --git a/src/librustdoc/html/templates/page.html b/src/librustdoc/html/templates/page.html
index 8540ee66319..7690d8f251f 100644
--- a/src/librustdoc/html/templates/page.html
+++ b/src/librustdoc/html/templates/page.html
@@ -23,11 +23,13 @@
     {%- for theme in themes -%}
         <link rel="stylesheet" disabled href="{{page.root_path|safe}}{{theme}}{{page.resource_suffix}}.css"> {#- -#}
     {%- endfor -%}
+    {%- if !layout.default_settings.is_empty() -%}
     <script id="default-settings" {# -#}
       {% for (k, v) in layout.default_settings %}
         data-{{k}}="{{v}}"
       {%- endfor -%}
     ></script> {#- -#}
+    {%- endif -%}
     <script src="{{static_root_path|safe}}{{files.storage_js}}"></script> {#- -#}
     {%- if page.css_class.contains("crate") -%}
     <script defer src="{{page.root_path|safe}}crates{{page.resource_suffix}}.js"></script> {#- -#}
diff --git a/src/tools/cargo b/src/tools/cargo
-Subproject e84a7928d93a31f284b497c214a2ece69b4d771
+Subproject 82c3bb79e3a19a5164e33819ef81bfc2c984bc5
diff --git a/src/tools/expand-yaml-anchors/src/main.rs b/src/tools/expand-yaml-anchors/src/main.rs
index 8992d165d5d..3fc72ecbbc4 100644
--- a/src/tools/expand-yaml-anchors/src/main.rs
+++ b/src/tools/expand-yaml-anchors/src/main.rs
@@ -51,7 +51,7 @@ impl App {
             ["generate", ref base] => (Mode::Generate, PathBuf::from(base)),
             ["check", ref base] => (Mode::Check, PathBuf::from(base)),
             _ => {
-                eprintln!("usage: expand-yaml-anchors <source-dir> <dest-dir>");
+                eprintln!("usage: expand-yaml-anchors <generate|check> <base-dir>");
                 std::process::exit(1);
             }
         };
diff --git a/src/tools/miri/src/intptrcast.rs b/src/tools/miri/src/intptrcast.rs
index 618cf9df7f3..dcb18790420 100644
--- a/src/tools/miri/src/intptrcast.rs
+++ b/src/tools/miri/src/intptrcast.rs
@@ -162,11 +162,14 @@ impl<'mir, 'tcx> GlobalStateInner {
         Ok(Pointer::new(Some(Provenance::Wildcard), Size::from_bytes(addr)))
     }
 
-    fn alloc_base_addr(ecx: &MiriInterpCx<'mir, 'tcx>, alloc_id: AllocId) -> u64 {
+    fn alloc_base_addr(
+        ecx: &MiriInterpCx<'mir, 'tcx>,
+        alloc_id: AllocId,
+    ) -> InterpResult<'tcx, u64> {
         let mut global_state = ecx.machine.intptrcast.borrow_mut();
         let global_state = &mut *global_state;
 
-        match global_state.base_addr.entry(alloc_id) {
+        Ok(match global_state.base_addr.entry(alloc_id) {
             Entry::Occupied(entry) => *entry.get(),
             Entry::Vacant(entry) => {
                 // There is nothing wrong with a raw pointer being cast to an integer only after
@@ -181,7 +184,10 @@ impl<'mir, 'tcx> GlobalStateInner {
                     rng.gen_range(0..16)
                 };
                 // From next_base_addr + slack, round up to adjust for alignment.
-                let base_addr = global_state.next_base_addr.checked_add(slack).unwrap();
+                let base_addr = global_state
+                    .next_base_addr
+                    .checked_add(slack)
+                    .ok_or_else(|| err_exhaust!(AddressSpaceFull))?;
                 let base_addr = Self::align_addr(base_addr, align.bytes());
                 entry.insert(base_addr);
                 trace!(
@@ -197,24 +203,33 @@ impl<'mir, 'tcx> GlobalStateInner {
                 // of at least 1 to avoid two allocations having the same base address.
                 // (The logic in `alloc_id_from_addr` assumes unique addresses, and different
                 // function/vtable pointers need to be distinguishable!)
-                global_state.next_base_addr = base_addr.checked_add(max(size.bytes(), 1)).unwrap();
+                global_state.next_base_addr = base_addr
+                    .checked_add(max(size.bytes(), 1))
+                    .ok_or_else(|| err_exhaust!(AddressSpaceFull))?;
+                // Even if `Size` didn't overflow, we might still have filled up the address space.
+                if global_state.next_base_addr > ecx.machine_usize_max() {
+                    throw_exhaust!(AddressSpaceFull);
+                }
                 // Given that `next_base_addr` increases in each allocation, pushing the
                 // corresponding tuple keeps `int_to_ptr_map` sorted
                 global_state.int_to_ptr_map.push((base_addr, alloc_id));
 
                 base_addr
             }
-        }
+        })
     }
 
     /// Convert a relative (tcx) pointer to an absolute address.
-    pub fn rel_ptr_to_addr(ecx: &MiriInterpCx<'mir, 'tcx>, ptr: Pointer<AllocId>) -> u64 {
+    pub fn rel_ptr_to_addr(
+        ecx: &MiriInterpCx<'mir, 'tcx>,
+        ptr: Pointer<AllocId>,
+    ) -> InterpResult<'tcx, u64> {
         let (alloc_id, offset) = ptr.into_parts(); // offset is relative (AllocId provenance)
-        let base_addr = GlobalStateInner::alloc_base_addr(ecx, alloc_id);
+        let base_addr = GlobalStateInner::alloc_base_addr(ecx, alloc_id)?;
 
         // Add offset with the right kind of pointer-overflowing arithmetic.
         let dl = ecx.data_layout();
-        dl.overflowing_offset(base_addr, offset.bytes()).0
+        Ok(dl.overflowing_offset(base_addr, offset.bytes()).0)
     }
 
     /// When a pointer is used for a memory access, this computes where in which allocation the
@@ -232,7 +247,9 @@ impl<'mir, 'tcx> GlobalStateInner {
             GlobalStateInner::alloc_id_from_addr(ecx, addr.bytes())?
         };
 
-        let base_addr = GlobalStateInner::alloc_base_addr(ecx, alloc_id);
+        // This cannot fail: since we already have a pointer with that provenance, rel_ptr_to_addr
+        // must have been called in the past.
+        let base_addr = GlobalStateInner::alloc_base_addr(ecx, alloc_id).unwrap();
 
         // Wrapping "addr - base_addr"
         let dl = ecx.data_layout();
diff --git a/src/tools/miri/src/machine.rs b/src/tools/miri/src/machine.rs
index 01a3d7550e2..8e44d4d7ade 100644
--- a/src/tools/miri/src/machine.rs
+++ b/src/tools/miri/src/machine.rs
@@ -971,7 +971,7 @@ impl<'mir, 'tcx> Machine<'mir, 'tcx> for MiriMachine<'mir, 'tcx> {
     fn adjust_alloc_base_pointer(
         ecx: &MiriInterpCx<'mir, 'tcx>,
         ptr: Pointer<AllocId>,
-    ) -> Pointer<Provenance> {
+    ) -> InterpResult<'tcx, Pointer<Provenance>> {
         if cfg!(debug_assertions) {
             // The machine promises to never call us on thread-local or extern statics.
             let alloc_id = ptr.provenance;
@@ -985,17 +985,17 @@ impl<'mir, 'tcx> Machine<'mir, 'tcx> for MiriMachine<'mir, 'tcx> {
                 _ => {}
             }
         }
-        let absolute_addr = intptrcast::GlobalStateInner::rel_ptr_to_addr(ecx, ptr);
+        let absolute_addr = intptrcast::GlobalStateInner::rel_ptr_to_addr(ecx, ptr)?;
         let tag = if let Some(borrow_tracker) = &ecx.machine.borrow_tracker {
             borrow_tracker.borrow_mut().base_ptr_tag(ptr.provenance, &ecx.machine)
         } else {
             // Value does not matter, SB is disabled
             BorTag::default()
         };
-        Pointer::new(
+        Ok(Pointer::new(
             Provenance::Concrete { alloc_id: ptr.provenance, tag },
             Size::from_bytes(absolute_addr),
-        )
+        ))
     }
 
     #[inline(always)]
diff --git a/src/tools/miri/src/shims/backtrace.rs b/src/tools/miri/src/shims/backtrace.rs
index 15987eee537..ed1c6ebfece 100644
--- a/src/tools/miri/src/shims/backtrace.rs
+++ b/src/tools/miri/src/shims/backtrace.rs
@@ -190,9 +190,9 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
             0 => {
                 // These are "mutable" allocations as we consider them to be owned by the callee.
                 let name_alloc =
-                    this.allocate_str(&name, MiriMemoryKind::Rust.into(), Mutability::Mut);
+                    this.allocate_str(&name, MiriMemoryKind::Rust.into(), Mutability::Mut)?;
                 let filename_alloc =
-                    this.allocate_str(&filename, MiriMemoryKind::Rust.into(), Mutability::Mut);
+                    this.allocate_str(&filename, MiriMemoryKind::Rust.into(), Mutability::Mut)?;
 
                 this.write_immediate(
                     name_alloc.to_ref(this),
diff --git a/src/tools/miri/src/shims/panic.rs b/src/tools/miri/src/shims/panic.rs
index db3e42facad..0ea1137200b 100644
--- a/src/tools/miri/src/shims/panic.rs
+++ b/src/tools/miri/src/shims/panic.rs
@@ -172,7 +172,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
         let this = self.eval_context_mut();
 
         // First arg: message.
-        let msg = this.allocate_str(msg, MiriMemoryKind::Machine.into(), Mutability::Not);
+        let msg = this.allocate_str(msg, MiriMemoryKind::Machine.into(), Mutability::Not)?;
 
         // Call the lang item.
         let panic = this.tcx.lang_items().panic_fn().unwrap();
diff --git a/src/tools/miri/tests/pass-dep/shims/pthreads.rs b/src/tools/miri/tests/pass-dep/shims/pthreads.rs
index 09dd92564d3..80b8d67401a 100644
--- a/src/tools/miri/tests/pass-dep/shims/pthreads.rs
+++ b/src/tools/miri/tests/pass-dep/shims/pthreads.rs
@@ -1,5 +1,4 @@
 //@ignore-target-windows: No libc on Windows
-#![feature(cstr_from_bytes_until_nul)]
 use std::ffi::{CStr, CString};
 use std::thread;
 
diff --git a/src/tools/rust-installer b/src/tools/rust-installer
-Subproject 5b2eee7eed72b4894909c5eecbf014ea0b5ad99
+Subproject 9981e4d1ea6ac0992ff21be5514d4230dc77548
diff --git a/src/tools/tidy/src/error_codes.rs b/src/tools/tidy/src/error_codes.rs
index 6bb4d32f87d..dd2fd1911f2 100644
--- a/src/tools/tidy/src/error_codes.rs
+++ b/src/tools/tidy/src/error_codes.rs
@@ -31,7 +31,7 @@ const IGNORE_DOCTEST_CHECK: &[&str] = &["E0464", "E0570", "E0601", "E0602", "E06
 
 // Error codes that don't yet have a UI test. This list will eventually be removed.
 const IGNORE_UI_TEST_CHECK: &[&str] =
-    &["E0461", "E0465", "E0476", "E0514", "E0523", "E0554", "E0640", "E0717", "E0729"];
+    &["E0461", "E0465", "E0476", "E0514", "E0554", "E0640", "E0717", "E0729"];
 
 macro_rules! verbose_print {
     ($verbose:expr, $($fmt:tt)*) => {
diff --git a/src/tools/tidy/src/ui_tests.rs b/src/tools/tidy/src/ui_tests.rs
index 806e84025c4..83551a1d820 100644
--- a/src/tools/tidy/src/ui_tests.rs
+++ b/src/tools/tidy/src/ui_tests.rs
@@ -10,7 +10,7 @@ use std::path::Path;
 const ENTRY_LIMIT: usize = 1000;
 // FIXME: The following limits should be reduced eventually.
 const ROOT_ENTRY_LIMIT: usize = 939;
-const ISSUES_ENTRY_LIMIT: usize = 1998;
+const ISSUES_ENTRY_LIMIT: usize = 2001;
 
 fn check_entries(path: &Path, bad: &mut bool) {
     for dir in Walk::new(&path.join("ui")) {