Merge pull request #4534 from rust-lang/rustup-2025-08-21

Automatic Rustup

14 files changed, 194 insertions, 60 deletions

diff --git a/src/bootstrap/src/core/build_steps/compile.rs b/src/bootstrap/src/core/build_steps/compile.rs
index 004b132f28f..be09cfa41af 100644
--- a/src/bootstrap/src/core/build_steps/compile.rs
+++ b/src/bootstrap/src/core/build_steps/compile.rs
@@ -1048,22 +1048,18 @@ impl Step for Rustc {
 
         // If we are building a stage3+ compiler, and full bootstrap is disabled, and we have a
         // previous rustc available, we will uplift a compiler from a previous stage.
+        // We do not allow cross-compilation uplifting here, because there it can be quite tricky
+        // to figure out which stage actually built the rustc that should be uplifted.
         if build_compiler.stage >= 2
             && !builder.config.full_bootstrap
-            && (target == builder.host_target || builder.hosts.contains(&target))
+            && target == builder.host_target
         {
             // Here we need to determine the **build compiler** that built the stage that we will
             // be uplifting. We cannot uplift stage 1, as it has a different ABI than stage 2+,
             // so we always uplift the stage2 compiler (compiled with stage 1).
             let uplift_build_compiler = builder.compiler(1, build_compiler.host);
-            let msg = if uplift_build_compiler.host == target {
-                format!("Uplifting rustc (stage2 -> stage{stage})")
-            } else {
-                format!(
-                    "Uplifting rustc (stage2:{} -> stage{stage}:{target})",
-                    uplift_build_compiler.host
-                )
-            };
+
+            let msg = format!("Uplifting rustc from stage2 to stage{stage})");
             builder.info(&msg);
 
             // Here the compiler that built the rlibs (`uplift_build_compiler`) can be different
diff --git a/src/bootstrap/src/core/builder/tests.rs b/src/bootstrap/src/core/builder/tests.rs
index f4266a6085b..a7db96055e6 100644
--- a/src/bootstrap/src/core/builder/tests.rs
+++ b/src/bootstrap/src/core/builder/tests.rs
@@ -673,6 +673,83 @@ mod snapshot {
     }
 
     #[test]
+    fn build_compiler_stage_3() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("build")
+                .path("compiler")
+                .stage(3)
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustc 1 <host> -> std 1 <host>
+        [build] rustc 1 <host> -> rustc 2 <host>
+        [build] rustc 2 <host> -> std 2 <host>
+        [build] rustc 2 <host> -> rustc 3 <host>
+        ");
+    }
+
+    #[test]
+    fn build_compiler_stage_3_cross() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("build")
+                .path("compiler")
+                .hosts(&[TEST_TRIPLE_1])
+                .stage(3)
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] llvm <target1>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustc 1 <host> -> std 1 <host>
+        [build] rustc 1 <host> -> rustc 2 <host>
+        [build] rustc 1 <host> -> std 1 <target1>
+        [build] rustc 2 <host> -> std 2 <target1>
+        [build] rustc 2 <host> -> std 2 <host>
+        [build] rustc 2 <host> -> rustc 3 <target1>
+        ");
+    }
+
+    #[test]
+    fn build_compiler_stage_3_full_bootstrap() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("build")
+                .path("compiler")
+                .stage(3)
+                .args(&["--set", "build.full-bootstrap=true"])
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustc 1 <host> -> std 1 <host>
+        [build] rustc 1 <host> -> rustc 2 <host>
+        [build] rustc 2 <host> -> std 2 <host>
+        [build] rustc 2 <host> -> rustc 3 <host>
+        ");
+    }
+
+    #[test]
+    fn build_compiler_stage_3_cross_full_bootstrap() {
+        let ctx = TestCtx::new();
+        insta::assert_snapshot!(
+            ctx.config("build")
+                .path("compiler")
+                .stage(3)
+                .hosts(&[TEST_TRIPLE_1])
+                .args(&["--set", "build.full-bootstrap=true"])
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] llvm <target1>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustc 1 <host> -> std 1 <host>
+        [build] rustc 1 <host> -> rustc 2 <host>
+        [build] rustc 2 <host> -> std 2 <target1>
+        [build] rustc 2 <host> -> std 2 <host>
+        [build] rustc 2 <host> -> rustc 3 <target1>
+        ");
+    }
+
+    #[test]
     fn build_compiler_codegen_backend() {
         let ctx = TestCtx::new();
         insta::assert_snapshot!(
diff --git a/src/ci/github-actions/jobs.yml b/src/ci/github-actions/jobs.yml
index ae13d14c380..8cfcc0c5b15 100644
--- a/src/ci/github-actions/jobs.yml
+++ b/src/ci/github-actions/jobs.yml
@@ -23,10 +23,6 @@ runners:
     <<: *base-job
 
   - &job-macos
-    os: macos-13
-    <<: *base-job
-
-  - &job-macos-m1
     os: macos-14
     <<: *base-job
 
@@ -68,17 +64,6 @@ runners:
     <<: *base-job
 
 envs:
-  env-x86_64-apple-tests: &env-x86_64-apple-tests
-    SCRIPT: ./x.py check compiletest --set build.compiletest-use-stage0-libtest=true && ./x.py --stage 2 test --skip tests/ui --skip tests/rustdoc -- --exact
-    RUST_CONFIGURE_ARGS: --build=x86_64-apple-darwin --enable-sanitizers --enable-profiler --set rust.jemalloc
-    # Ensure that host tooling is tested on our minimum supported macOS version.
-    MACOSX_DEPLOYMENT_TARGET: 10.12
-    MACOSX_STD_DEPLOYMENT_TARGET: 10.12
-    SELECT_XCODE: /Applications/Xcode_15.2.app
-    NO_LLVM_ASSERTIONS: 1
-    NO_DEBUG_ASSERTIONS: 1
-    NO_OVERFLOW_CHECKS: 1
-
   production:
     &production
     DEPLOY_BUCKET: rust-lang-ci2
@@ -455,8 +440,19 @@ auto:
 
   - name: dist-x86_64-apple
     env:
-      SCRIPT: ./x.py dist bootstrap --include-default-paths --host=x86_64-apple-darwin --target=x86_64-apple-darwin
-      RUST_CONFIGURE_ARGS: --enable-full-tools --enable-sanitizers --enable-profiler --set rust.jemalloc --set rust.lto=thin --set rust.codegen-units=1
+      SCRIPT: >-
+        ./x.py dist bootstrap
+        --include-default-paths
+        --host=x86_64-apple-darwin
+        --target=x86_64-apple-darwin
+      RUST_CONFIGURE_ARGS: >-
+        --enable-full-tools
+        --enable-sanitizers
+        --enable-profiler
+        --disable-docs
+        --set rust.jemalloc
+        --set rust.lto=thin
+        --set rust.codegen-units=1
       # Ensure that host tooling is built to support our minimum support macOS version.
       MACOSX_DEPLOYMENT_TARGET: 10.12
       MACOSX_STD_DEPLOYMENT_TARGET: 10.12
@@ -482,17 +478,6 @@ auto:
       NO_LLVM_ASSERTIONS: 1
       NO_DEBUG_ASSERTIONS: 1
       NO_OVERFLOW_CHECKS: 1
-    <<: *job-macos-m1
-
-  - name: x86_64-apple-1
-    env:
-      <<: *env-x86_64-apple-tests
-    <<: *job-macos
-
-  - name: x86_64-apple-2
-    env:
-      SCRIPT: ./x.py --stage 2 test tests/ui tests/rustdoc
-      <<: *env-x86_64-apple-tests
     <<: *job-macos
 
   - name: dist-aarch64-apple
@@ -517,7 +502,7 @@ auto:
       NO_OVERFLOW_CHECKS: 1
       DIST_REQUIRE_ALL_TOOLS: 1
       CODEGEN_BACKENDS: llvm,cranelift
-    <<: *job-macos-m1
+    <<: *job-macos
 
   - name: aarch64-apple
     env:
@@ -537,7 +522,7 @@ auto:
       NO_LLVM_ASSERTIONS: 1
       NO_DEBUG_ASSERTIONS: 1
       NO_OVERFLOW_CHECKS: 1
-    <<: *job-macos-m1
+    <<: *job-macos
 
   ######################
   #  Windows Builders  #
diff --git a/src/doc/rustc/src/platform-support.md b/src/doc/rustc/src/platform-support.md
index 89b43cda9b9..c039517a970 100644
--- a/src/doc/rustc/src/platform-support.md
+++ b/src/doc/rustc/src/platform-support.md
@@ -36,7 +36,6 @@ target | notes
 `aarch64-unknown-linux-gnu` | ARM64 Linux (kernel 4.1+, glibc 2.17+)
 [`i686-pc-windows-msvc`](platform-support/windows-msvc.md) | 32-bit MSVC (Windows 10+, Windows Server 2016+, Pentium 4) [^x86_32-floats-return-ABI] [^win32-msvc-alignment]
 `i686-unknown-linux-gnu` | 32-bit Linux (kernel 3.2+, glibc 2.17+, Pentium 4) [^x86_32-floats-return-ABI]
-[`x86_64-apple-darwin`](platform-support/apple-darwin.md) | 64-bit macOS (10.12+, Sierra+)
 [`x86_64-pc-windows-gnu`](platform-support/windows-gnu.md) | 64-bit MinGW (Windows 10+, Windows Server 2016+)
 [`x86_64-pc-windows-msvc`](platform-support/windows-msvc.md) | 64-bit MSVC (Windows 10+, Windows Server 2016+)
 `x86_64-unknown-linux-gnu` | 64-bit Linux (kernel 3.2+, glibc 2.17+)
@@ -106,6 +105,7 @@ target | notes
 [`riscv64gc-unknown-linux-gnu`](platform-support/riscv64gc-unknown-linux-gnu.md) | RISC-V Linux (kernel 4.20+, glibc 2.29)
 [`riscv64gc-unknown-linux-musl`](platform-support/riscv64gc-unknown-linux-musl.md) | RISC-V Linux (kernel 4.20+, musl 1.2.3)
 [`s390x-unknown-linux-gnu`](platform-support/s390x-unknown-linux-gnu.md) | S390x Linux (kernel 3.2+, glibc 2.17)
+[`x86_64-apple-darwin`](platform-support/apple-darwin.md) | 64-bit macOS (10.12+, Sierra+)
 [`x86_64-pc-windows-gnullvm`](platform-support/windows-gnullvm.md) | 64-bit x86 MinGW (Windows 10+), LLVM ABI
 [`x86_64-unknown-freebsd`](platform-support/freebsd.md) | 64-bit x86 FreeBSD
 [`x86_64-unknown-illumos`](platform-support/illumos.md) | illumos
diff --git a/src/doc/rustc/src/platform-support/apple-darwin.md b/src/doc/rustc/src/platform-support/apple-darwin.md
index e41aee9bdb2..bdbb3a663f1 100644
--- a/src/doc/rustc/src/platform-support/apple-darwin.md
+++ b/src/doc/rustc/src/platform-support/apple-darwin.md
@@ -4,9 +4,12 @@ Apple macOS targets.
 
 **Tier: 1**
 
-- `x86_64-apple-darwin`: macOS on 64-bit x86.
 - `aarch64-apple-darwin`: macOS on ARM64 (M1-family or later Apple Silicon CPUs).
 
+**Tier: 2**
+
+- `x86_64-apple-darwin`: macOS on 64-bit x86.
+
 ## Target maintainers
 
 [@thomcc](https://github.com/thomcc)
diff --git a/src/librustdoc/html/static/js/rustdoc.d.ts b/src/librustdoc/html/static/js/rustdoc.d.ts
index 56581aebf06..28852125fe1 100644
--- a/src/librustdoc/html/static/js/rustdoc.d.ts
+++ b/src/librustdoc/html/static/js/rustdoc.d.ts
@@ -514,4 +514,13 @@ declare namespace rustdoc {
         options?: string[],
         default: string | boolean,
     }
+
+    /**
+     * Single element in the data-locs field of a scraped example.
+     * First field is the start and end char index,
+     * other fields seem to be unused.
+     *
+     * Generated by `render_call_locations` in `render/mod.rs`.
+     */
+    type ScrapedLoc = [[number, number], string, string]
 }
diff --git a/src/librustdoc/html/static/js/scrape-examples.js b/src/librustdoc/html/static/js/scrape-examples.js
index d641405c875..eeab591bcd8 100644
--- a/src/librustdoc/html/static/js/scrape-examples.js
+++ b/src/librustdoc/html/static/js/scrape-examples.js
@@ -1,7 +1,4 @@
-/* global addClass, hasClass, removeClass, onEachLazy */
-
-// Eventually fix this.
-// @ts-nocheck
+ /* global addClass, hasClass, removeClass, onEachLazy, nonnull */
 
 "use strict";
 
@@ -14,8 +11,16 @@
     const DEFAULT_MAX_LINES = 5;
     const HIDDEN_MAX_LINES = 10;
 
-    // Scroll code block to the given code location
+    /**
+     * Scroll code block to the given code location
+     * @param {HTMLElement} elt
+     * @param {[number, number]} loc
+     * @param {boolean} isHidden
+     */
     function scrollToLoc(elt, loc, isHidden) {
+        /** @type {HTMLElement[]} */
+        // blocked on https://github.com/microsoft/TypeScript/issues/29037
+        // @ts-expect-error
         const lines = elt.querySelectorAll("[data-nosnippet]");
         let scrollOffset;
 
@@ -35,10 +40,15 @@
             scrollOffset = offsetMid - halfHeight;
         }
 
-        lines[0].parentElement.scrollTo(0, scrollOffset);
-        elt.querySelector(".rust").scrollTo(0, scrollOffset);
+        nonnull(lines[0].parentElement).scrollTo(0, scrollOffset);
+        nonnull(elt.querySelector(".rust")).scrollTo(0, scrollOffset);
     }
 
+    /**
+     * @param {HTMLElement} parent
+     * @param {string} className
+     * @param {string} content
+     */
     function createScrapeButton(parent, className, content) {
         const button = document.createElement("button");
         button.className = className;
@@ -50,20 +60,24 @@
     window.updateScrapedExample = (example, buttonHolder) => {
         let locIndex = 0;
         const highlights = Array.prototype.slice.call(example.querySelectorAll(".highlight"));
-        const link = example.querySelector(".scraped-example-title a");
+
+        /** @type {HTMLAnchorElement} */
+        const link = nonnull(example.querySelector(".scraped-example-title a"));
         let expandButton = null;
 
         if (!example.classList.contains("expanded")) {
             expandButton = createScrapeButton(buttonHolder, "expand", "Show all");
         }
-        const isHidden = example.parentElement.classList.contains("more-scraped-examples");
+        const isHidden = nonnull(example.parentElement).classList.contains("more-scraped-examples");
 
+        // @ts-expect-error
         const locs = example.locs;
         if (locs.length > 1) {
             const next = createScrapeButton(buttonHolder, "next", "Next usage");
             const prev = createScrapeButton(buttonHolder, "prev", "Previous usage");
 
             // Toggle through list of examples in a given file
+            /** @type {function(function(): void): void} */
             const onChangeLoc = changeIndex => {
                 removeClass(highlights[locIndex], "focus");
                 changeIndex();
@@ -106,10 +120,19 @@
         }
     };
 
+    /**
+     * Initialize the `locs` field
+     *
+     * @param {HTMLElement & {locs?: rustdoc.ScrapedLoc[]}} example
+     * @param {boolean} isHidden
+     */
     function setupLoc(example, isHidden) {
-        example.locs = JSON.parse(example.attributes.getNamedItem("data-locs").textContent);
+        const locs_str = nonnull(example.attributes.getNamedItem("data-locs")).textContent;
+        const locs =
+              JSON.parse(nonnull(nonnull(locs_str)));
+        example.locs = locs;
         // Start with the first example in view
-        scrollToLoc(example, example.locs[0][0], isHidden);
+        scrollToLoc(example, locs[0][0], isHidden);
     }
 
     const firstExamples = document.querySelectorAll(".scraped-example-list > .scraped-example");
diff --git a/src/tools/build-manifest/src/main.rs b/src/tools/build-manifest/src/main.rs
index 0520eff0fa2..8f88ab10bf7 100644
--- a/src/tools/build-manifest/src/main.rs
+++ b/src/tools/build-manifest/src/main.rs
@@ -205,7 +205,7 @@ static TARGETS: &[&str] = &[
 ///
 /// The order here matters, more specific entries should be first.
 static DOCS_FALLBACK: &[(&str, &str)] = &[
-    ("-apple-", "x86_64-apple-darwin"),
+    ("-apple-", "aarch64-apple-darwin"),
     ("aarch64", "aarch64-unknown-linux-gnu"),
     ("arm-", "aarch64-unknown-linux-gnu"),
     ("", "x86_64-unknown-linux-gnu"),
diff --git a/src/tools/clippy/tests/ui/checked_unwrap/simple_conditionals.stderr b/src/tools/clippy/tests/ui/checked_unwrap/simple_conditionals.stderr
index 26e360112b6..939b509d85c 100644
--- a/src/tools/clippy/tests/ui/checked_unwrap/simple_conditionals.stderr
+++ b/src/tools/clippy/tests/ui/checked_unwrap/simple_conditionals.stderr
@@ -330,7 +330,7 @@ LL |         if X.is_some() {
    |
    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
-   = note: `#[deny(static_mut_refs)]` on by default
+   = note: `#[deny(static_mut_refs)]` (part of `#[deny(rust_2024_compatibility)]`) on by default
 
 error: aborting due to 36 previous errors
 
diff --git a/src/tools/miri/cargo-miri/Cargo.lock b/src/tools/miri/cargo-miri/Cargo.lock
index b3f5dafab64..ea9c04a3cb5 100644
--- a/src/tools/miri/cargo-miri/Cargo.lock
+++ b/src/tools/miri/cargo-miri/Cargo.lock
@@ -429,9 +429,9 @@ dependencies = [
 
 [[package]]
 name = "rustc-build-sysroot"
-version = "0.5.9"
+version = "0.5.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fdb13874a0e55baf4ac3d49d38206aecb31a55b75d6c4d04fd850b53942c8cc8"
+checksum = "dd41ead66a69880951b2f7df3139db401d44451b4da123344d27eaa791b89c95"
 dependencies = [
  "anyhow",
  "rustc_version",
diff --git a/src/tools/miri/cargo-miri/Cargo.toml b/src/tools/miri/cargo-miri/Cargo.toml
index 77cb1df8e74..64b56ea114e 100644
--- a/src/tools/miri/cargo-miri/Cargo.toml
+++ b/src/tools/miri/cargo-miri/Cargo.toml
@@ -18,7 +18,7 @@ directories = "6"
 rustc_version = "0.4"
 serde_json = "1.0.40"
 cargo_metadata = "0.21"
-rustc-build-sysroot = "0.5.8"
+rustc-build-sysroot = "0.5.10"
 
 # Enable some feature flags that dev-dependencies need but dependencies
 # do not.  This makes `./miri install` after `./miri build` faster.
diff --git a/src/tools/miri/rust-version b/src/tools/miri/rust-version
index 59adc572eaa..85ce9ed79f4 100644
--- a/src/tools/miri/rust-version
+++ b/src/tools/miri/rust-version
@@ -1 +1 @@
-f605b57042ffeb320d7ae44490113a827139b766
+125ff8a788c5d6a66917f499abdc00051afe6886
diff --git a/src/tools/miri/tests/pass/prefetch.rs b/src/tools/miri/tests/pass/prefetch.rs
new file mode 100644
index 00000000000..99c75c38bde
--- /dev/null
+++ b/src/tools/miri/tests/pass/prefetch.rs
@@ -0,0 +1,23 @@
+#![feature(core_intrinsics)]
+
+// Test that these intrinsics work. Their behavior should be a no-op.
+
+fn main() {
+    static X: [u8; 8] = [0; 8];
+
+    ::std::intrinsics::prefetch_read_data::<_, 1>(::std::ptr::null::<u8>());
+    ::std::intrinsics::prefetch_read_data::<_, 2>(::std::ptr::dangling::<u8>());
+    ::std::intrinsics::prefetch_read_data::<_, 3>(X.as_ptr());
+
+    ::std::intrinsics::prefetch_write_data::<_, 1>(::std::ptr::null::<u8>());
+    ::std::intrinsics::prefetch_write_data::<_, 2>(::std::ptr::dangling::<u8>());
+    ::std::intrinsics::prefetch_write_data::<_, 3>(X.as_ptr());
+
+    ::std::intrinsics::prefetch_read_instruction::<_, 1>(::std::ptr::null::<u8>());
+    ::std::intrinsics::prefetch_read_instruction::<_, 2>(::std::ptr::dangling::<u8>());
+    ::std::intrinsics::prefetch_read_instruction::<_, 3>(X.as_ptr());
+
+    ::std::intrinsics::prefetch_write_instruction::<_, 1>(::std::ptr::null::<u8>());
+    ::std::intrinsics::prefetch_write_instruction::<_, 2>(::std::ptr::dangling::<u8>());
+    ::std::intrinsics::prefetch_write_instruction::<_, 3>(X.as_ptr());
+}
diff --git a/src/tools/rustdoc-js/tester.js b/src/tools/rustdoc-js/tester.js
index a1e632ce743..ff809d58e90 100644
--- a/src/tools/rustdoc-js/tester.js
+++ b/src/tools/rustdoc-js/tester.js
@@ -405,6 +405,24 @@ async function runChecks(testFile, doSearch, parseQuery) {
     return res;
 }
 
+function mostRecentMatch(staticFiles, regex) {
+    const matchingEntries = fs.readdirSync(staticFiles)
+        .filter(f => f.match(regex))
+        .map(f => {
+            const stats = fs.statSync(path.join(staticFiles, f));
+            return {
+                path: f,
+                time: stats.mtimeMs,
+            };
+        });
+    if (matchingEntries.length === 0) {
+        throw "No static file matching regex";
+    }
+    // We sort entries in descending order.
+    matchingEntries.sort((a, b) => b.time - a.time);
+    return matchingEntries[0].path;
+}
+
 /**
  * Load searchNNN.js and search-indexNNN.js.
  *
@@ -417,9 +435,9 @@ async function runChecks(testFile, doSearch, parseQuery) {
  */
 async function loadSearchJS(doc_folder, resource_suffix) {
     const staticFiles = path.join(doc_folder, "static.files");
-    const stringdexJs = fs.readdirSync(staticFiles).find(f => f.match(/stringdex.*\.js$/));
+    const stringdexJs = mostRecentMatch(staticFiles, /stringdex.*\.js$/);
     const stringdexModule = require(path.join(staticFiles, stringdexJs));
-    const searchJs = fs.readdirSync(staticFiles).find(f => f.match(/search.*\.js$/));
+    const searchJs = mostRecentMatch(staticFiles, /search-[0-9a-f]{8}.*\.js$/);
     const searchModule = require(path.join(staticFiles, searchJs));
     globalThis.nonnull = (x, msg) => {
         if (x === null) {