Merge branch 'main' into jit_float_truediv

Author: eendebakpt

.github/dependabot.yml

@@ -3,7 +3,7 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "monthly"
+      interval: "quarterly"
     labels:
       - "skip issue"
       - "skip news"
@@ -24,7 +24,7 @@ updates:
   - package-ecosystem: "pip"
     directory: "/Tools/"
     schedule:
-      interval: "monthly"
+      interval: "quarterly"
     labels:
       - "skip issue"
       - "skip news"

.github/workflows/add-issue-header.yml

@@ -20,7 +20,7 @@ jobs:
       issues: write
     timeout-minutes: 5
     steps:
-      - uses: actions/github-script@v8
+      - uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
         with:
           # language=JavaScript
           script: |

.github/workflows/build.yml

@@ -64,7 +64,7 @@ jobs:
         run: |
           apt update && apt install git -yq
           git config --global --add safe.directory "$GITHUB_WORKSPACE"
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 1
           persist-credentials: false
@@ -101,10 +101,10 @@ jobs:
     needs: build-context
     if: needs.build-context.outputs.run-tests == 'true'
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: '3.x'
       - name: Runner image version
@@ -165,13 +165,21 @@ jobs:
         free-threading:
           - false
           - true
+        interpreter:
+          - switch-case
         exclude:
           # Skip Win32 on free-threaded builds
           - { arch: Win32, free-threading: true }
+        include:
+          # msvc::musttail is currently only supported on x64,
+          # and only supported on 3.15+.
+          - { arch: x64, free-threading: false, interpreter: tail-call }
+          - { arch: x64, free-threading: true,  interpreter: tail-call }
     uses: ./.github/workflows/reusable-windows.yml
     with:
       arch: ${{ matrix.arch }}
       free-threading: ${{ matrix.free-threading }}
+      interpreter: ${{ matrix.interpreter }}
 
   build-windows-msi:
     # ${{ '' } is a hack to nest jobs under the same sidebar category.
@@ -198,16 +206,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # macos-26 is Apple Silicon, macos-26-intel is Intel.
-        # macos-26-intel only runs tests against the GIL-enabled CPython.
+        # macos-26 is Apple Silicon, macos-15-intel is Intel.
+        # macos-15-intel only runs tests against the GIL-enabled CPython.
         os:
         - macos-26
-        - macos-26-intel
+        - macos-15-intel
         free-threading:
         - false
         - true
         exclude:
-        - os: macos-26-intel
+        - os: macos-15-intel
           free-threading: true
     uses: ./.github/workflows/reusable-macos.yml
     with:
@@ -283,7 +291,7 @@ jobs:
       SSLLIB_DIR: ${{ github.workspace }}/multissl/${{ matrix.ssllib.name }}/${{ matrix.ssllib.version }}
       LD_LIBRARY_PATH: ${{ github.workspace }}/multissl/${{ matrix.ssllib.name }}/${{ matrix.ssllib.version }}/lib
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       with:
         persist-credentials: false
     - name: Runner image version
@@ -294,7 +302,7 @@ jobs:
       run: sudo ./.github/workflows/posix-deps-apt.sh
     - name: 'Restore SSL library build'
       id: cache-ssl-lib
-      uses: actions/cache@v5
+      uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
       with:
         path: ./multissl/${{ matrix.ssllib.name }}/${{ matrix.ssllib.version }}
         key: ${{ matrix.os }}-multissl-${{ matrix.ssllib.name }}-${{ matrix.ssllib.version }}
@@ -342,7 +350,7 @@ jobs:
 
     runs-on: ${{ matrix.runs-on }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Build and test
@@ -355,7 +363,7 @@ jobs:
     timeout-minutes: 60
     runs-on: macos-14
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 
@@ -393,7 +401,7 @@ jobs:
       OPENSSL_VER: 3.5.5
       PYTHONSTRICTEXTENSIONBUILD: 1
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       with:
         persist-credentials: false
     - name: Register gcc problem matcher
@@ -407,7 +415,7 @@ jobs:
         echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
     - name: 'Restore OpenSSL build'
       id: cache-openssl
-      uses: actions/cache@v5
+      uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
       with:
         path: ./multissl/openssl/${{ env.OPENSSL_VER }}
         key: ${{ runner.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
@@ -454,7 +462,7 @@ jobs:
         ./python -m venv "$VENV_LOC" && "$VENV_PYTHON" -m pip install -r "${GITHUB_WORKSPACE}/Tools/requirements-hypothesis.txt"
     - name: 'Restore Hypothesis database'
       id: cache-hypothesis-database
-      uses: actions/cache@v5
+      uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
       with:
         path: ${{ env.CPYTHON_BUILDDIR }}/.hypothesis/
         key: hypothesis-database-${{ github.head_ref || github.run_id }}
@@ -481,7 +489,7 @@ jobs:
           -x test_subprocess \
           -x test_signal \
           -x test_sysconfig
-    - uses: actions/upload-artifact@v7
+    - uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
       if: always()
       with:
         name: hypothesis-example-db
@@ -502,7 +510,7 @@ jobs:
       PYTHONSTRICTEXTENSIONBUILD: 1
       ASAN_OPTIONS: detect_leaks=0:allocator_may_return_null=1:handle_segv=0
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       with:
         persist-credentials: false
     - name: Runner image version
@@ -512,7 +520,7 @@ jobs:
     - name: Install dependencies
       run: sudo ./.github/workflows/posix-deps-apt.sh
     - name: Set up GCC-10 for ASAN
-      uses: egor-tensin/setup-gcc@v2
+      uses: egor-tensin/setup-gcc@a2861a8b8538f49cf2850980acccf6b05a1b2ae4 # v2.0
       with:
         version: 10
     - name: Configure OpenSSL env vars
@@ -522,7 +530,7 @@ jobs:
         echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
     - name: 'Restore OpenSSL build'
       id: cache-openssl
-      uses: actions/cache@v5
+      uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
       with:
         path: ./multissl/openssl/${{ env.OPENSSL_VER }}
         key: ${{ matrix.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
@@ -569,7 +577,7 @@ jobs:
     needs: build-context
     if: needs.build-context.outputs.run-ubuntu == 'true'
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Runner image version

.github/workflows/documentation-links.yml

@@ -22,7 +22,7 @@ jobs:
     timeout-minutes: 5
 
     steps:
-      - uses: readthedocs/actions/preview@v1
+      - uses: readthedocs/actions/preview@b8bba1484329bda1a3abe986df7ebc80a8950333 # v1.5
         with:
           project-slug: "cpython-previews"
           single-version: "true"

.github/workflows/jit.yml

@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - name: Build tier two interpreter
@@ -69,10 +69,10 @@ jobs:
             architecture: ARM64
             runner: windows-11-arm
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: '3.11'
       # PCbuild downloads LLVM automatically:
@@ -103,10 +103,10 @@ jobs:
           - target: aarch64-apple-darwin/clang
             runner: macos-26
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: '3.11'
       - name: Install LLVM
@@ -146,10 +146,10 @@ jobs:
           - target: aarch64-unknown-linux-gnu/gcc
             runner: ubuntu-24.04-arm
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: '3.11'
       - name: Build
@@ -182,10 +182,10 @@ jobs:
             use_clang: true
             run_tests: false
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: '3.11'
       - name: Build

.github/workflows/lint.yml

@@ -19,7 +19,7 @@ jobs:
     timeout-minutes: 10
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: j178/prek-action@v1
+      - uses: j178/prek-action@0bb87d7f00b0c99306c8bcb8b8beba1eb581c037 # v1.1.1

.github/workflows/mypy.yml

@@ -65,10 +65,10 @@ jobs:
           "Tools/peg_generator",
         ]
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "3.13"
           cache: pip

.github/workflows/new-bugs-announce-notifier.yml

@@ -13,12 +13,12 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: 20
       - run: npm install mailgun.js form-data
       - name: Send notification
-        uses: actions/github-script@v8
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
         env:
           MAILGUN_API_KEY: ${{ secrets.MAILGUN_PYTHON_ORG_MAILGUN_KEY }}
         with:

.github/workflows/require-pr-label.yml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Check there's no DO-NOT-MERGE
-        uses: mheap/github-action-required-labels@v5
+        uses: mheap/github-action-required-labels@0ac283b4e65c1fb28ce6079dea5546ceca98ccbe # v5.5.2
         with:
           mode: exactly
           count: 0
@@ -33,7 +33,7 @@ jobs:
     steps:
       # Check that the PR is not awaiting changes from the author due to previous review.
       - name: Check there's no required changes
-        uses: mheap/github-action-required-labels@v5
+        uses: mheap/github-action-required-labels@0ac283b4e65c1fb28ce6079dea5546ceca98ccbe # v5.5.2
         with:
           mode: exactly
           count: 0
@@ -42,7 +42,7 @@ jobs:
             awaiting change review
       - id: is-feature
         name: Check whether this PR is a feature (contains a "type-feature" label)
-        uses: mheap/github-action-required-labels@v5
+        uses: mheap/github-action-required-labels@0ac283b4e65c1fb28ce6079dea5546ceca98ccbe # v5.5.2
         with:
           mode: exactly
           count: 1
@@ -53,7 +53,7 @@ jobs:
       - id: awaiting-merge
         if: steps.is-feature.outputs.status == 'success'
         name: Check for complete review
-        uses: mheap/github-action-required-labels@v5
+        uses: mheap/github-action-required-labels@0ac283b4e65c1fb28ce6079dea5546ceca98ccbe # v5.5.2
         with:
           mode: exactly
           count: 1

.github/workflows/reusable-check-c-api-docs.yml

@@ -15,10 +15,10 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: '3.x'
       - name: Check for undocumented C APIs