Merge branch 'master' into transmute-scalar_test

Author: CaiWeiran

.editorconfig

@@ -7,9 +7,18 @@ root = true
 [*]
 end_of_line = lf
 charset = utf-8
-trim_trailing_whitespace = true
 insert_final_newline = true
 
+# some tests need trailing whitespace in output snapshots
+[!tests/]
+trim_trailing_whitespace = true
+# for actual source code files of test, we still don't want trailing whitespace
+[tests/**.{rs,js}]
+trim_trailing_whitespace = true
+# these specific source files need to have trailing whitespace.
+[tests/ui/{frontmatter/frontmatter-whitespace-3.rs,parser/shebang/shebang-space.rs}]
+trim_trailing_whitespace = false
+
 [!src/llvm-project]
 indent_style = space
 indent_size = 4

.github/ISSUE_TEMPLATE/documentation.yaml

@@ -1,5 +1,5 @@
 name: Documentation problem
-description: Create a report for a documentation problem.
+description: Report an issue with documentation content.
 labels: ["A-docs"]
 body:
   - type: markdown
@@ -19,20 +19,20 @@ body:
         - [The Rustonomicon](https://github.com/rust-lang/nomicon/issues)
         - [The Embedded Book](https://github.com/rust-embedded/book/issues)
 
-        All other documentation issues should be filed here.
+        Or, if you find an issue related to rustdoc (e.g. doctest, rustdoc UI), please use the rustdoc issue template instead.
 
-        Or, if you find an issue related to rustdoc (e.g. doctest, rustdoc UI), please use the bug report or blank issue template instead.
+        All other documentation issues should be filed here.
 
   - type: textarea
     id: location
     attributes:
-      label: Location
+      label: Location (URL)
     validations:
-      required: true 
+      required: true
 
   - type: textarea
     id: summary
     attributes:
       label: Summary
     validations:
-      required: true 
+      required: true

.github/workflows/ci.yml

@@ -52,7 +52,7 @@ jobs:
       run_type: ${{ steps.jobs.outputs.run_type }}
     steps:
       - name: Checkout the source code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Test citool
         # Only test citool on the auto branch, to reduce latency of the calculate matrix job
         # on PR/try builds.
@@ -113,18 +113,25 @@ jobs:
         run: git config --global core.autocrlf false
 
       - name: checkout the source code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 2
 
-      # Free up disk space on Linux by removing preinstalled components that
+      # Free up disk space on Linux and Windows by removing preinstalled components that
       # we do not need. We do this to enable some of the less resource
       # intensive jobs to run on free runners, which however also have
       # less disk space.
       - name: free up disk space
         run: src/ci/scripts/free-disk-space.sh
         if: matrix.free_disk
 
+      # If we don't need to free up disk space then just report how much space we have
+      - name: print disk usage
+        run: |
+          echo "disk usage:"
+          df -h
+        if: matrix.free_disk == false
+
       # Rust Log Analyzer can't currently detect the PR number of a GitHub
       # Actions build on its own, so a hint in the log message is needed to
       # point it in the right direction.
@@ -152,9 +159,6 @@ jobs:
       - name: show the current environment
         run: src/ci/scripts/dump-environment.sh
 
-      - name: install rust
-        run: src/ci/scripts/install-rust.sh
-
       - name: install awscli
         run: src/ci/scripts/install-awscli.sh
 
@@ -219,6 +223,11 @@ jobs:
           cd src/ci/citool
           CARGO_INCREMENTAL=0 CARGO_TARGET_DIR=../../../build/citool cargo build
 
+      - name: wait for Windows disk cleanup to finish
+        if: ${{ matrix.free_disk && startsWith(matrix.os, 'windows-') }}
+        run: |
+          python3 src/ci/scripts/free-disk-space-windows-wait.py
+
       - name: run the build
         run: |
           set +e
@@ -309,7 +318,7 @@ jobs:
     if: ${{ !cancelled() && contains(fromJSON('["auto", "try"]'), needs.calculate_matrix.outputs.run_type) }}
     steps:
       - name: checkout the source code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 2
       # Calculate the exit status of the whole CI workflow.

.github/workflows/dependencies.yml

@@ -51,7 +51,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: checkout the source code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           submodules: recursive
       - name: install the bootstrap toolchain
@@ -101,7 +101,7 @@ jobs:
       pull-requests: write
     steps:
       - name: checkout the source code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: download Cargo.lock from update job
         uses: actions/download-artifact@v4

.github/workflows/ghcr.yml

@@ -29,7 +29,7 @@ jobs:
       # Needed to write to the ghcr.io registry
       packages: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           persist-credentials: false
 

.github/workflows/post-merge.yml

@@ -15,7 +15,7 @@ jobs:
     permissions:
       pull-requests: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           # Make sure that we have enough commits to find the parent merge commit.
           # Since all merges should be through merge commits, fetching two commits

.gitmodules

@@ -25,7 +25,7 @@
 [submodule "src/llvm-project"]
 	path = src/llvm-project
 	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/20.1-2025-07-13
+	branch = rustc/21.1-2025-08-01
 	shallow = true
 [submodule "src/doc/embedded-book"]
 	path = src/doc/embedded-book

.mailmap

@@ -597,6 +597,7 @@ Sam Radhakrishnan <[email protected]>
 Samuel Tardieu <[email protected]>
 Santiago Pastorino <[email protected]>
 Santiago Pastorino <[email protected]> <[email protected]>
+Sasha Pourcelot <[email protected]> Sasha <[email protected]>
 Scott McMurray <[email protected]>
 Scott McMurray <[email protected]> <[email protected]>
 Scott Olson <[email protected]> Scott Olson <[email protected]>