Update whatsnew again

Author: sharktide

.editorconfig

@@ -1,11 +1,11 @@
 root = true
 
-[*.{py,c,cpp,h,js,rst,md,yml,yaml}]
+[*.{py,c,cpp,h,js,rst,md,yml,yaml,gram}]
 trim_trailing_whitespace = true
 insert_final_newline = true
 indent_style = space
 
-[*.{py,c,cpp,h}]
+[*.{py,c,cpp,h,gram}]
 indent_size = 4
 
 [*.rst]

.github/CODEOWNERS

@@ -4,17 +4,23 @@
 # It uses the same pattern rule for gitignore file
 # https://git-scm.com/docs/gitignore#_pattern_format
 
-# GitHub
+# Azure Pipelines
+.azure-pipelines/             @AA-Turner
+
+# GitHub & related scripts
 .github/**                    @ezio-melotti @hugovk @AA-Turner
+Tools/build/compute-changes.py @AA-Turner
+Tools/build/verify_ensurepip_wheels.py @AA-Turner
 
 # pre-commit
-.pre-commit-config.yaml       @hugovk @AlexWaygood
+.pre-commit-config.yaml       @hugovk
 .ruff.toml                    @hugovk @AlexWaygood @AA-Turner
 
-# Build system
-configure*                    @erlend-aasland @corona10
-Makefile.pre.in               @erlend-aasland
-Modules/Setup*                @erlend-aasland
+# Build system (autotools)
+configure*                    @erlend-aasland @corona10 @AA-Turner
+Makefile.pre.in               @erlend-aasland @AA-Turner
+Modules/Setup*                @erlend-aasland @AA-Turner
+Tools/build/regen-configure.sh @AA-Turner
 
 # argparse
 **/*argparse*                 @savannahostrowski
@@ -26,7 +32,8 @@ Modules/Setup*                @erlend-aasland
 **/*context*                  @1st1
 **/*genobject*                @markshannon
 **/*hamt*                     @1st1
-**/*jit*                      @brandtbucher @savannahostrowski
+**/*jit*                      @brandtbucher @savannahostrowski @diegorusso
+Python/perf_jit_trampoline.c  # Exclude the owners of "**/*jit*", above.
 Objects/set*                  @rhettinger
 Objects/dict*                 @methane @markshannon
 Objects/typevarobject.c       @JelleZijlstra
@@ -45,8 +52,9 @@ Python/flowgraph.c            @markshannon @iritkatriel
 Python/instruction_sequence.c @iritkatriel
 Python/bytecodes.c            @markshannon
 Python/optimizer*.c           @markshannon
-Python/optimizer_analysis.c   @Fidget-Spinner
-Python/optimizer_bytecodes.c  @Fidget-Spinner
+Python/optimizer_analysis.c   @Fidget-Spinner @tomasr8
+Python/optimizer_bytecodes.c  @Fidget-Spinner @tomasr8
+Python/optimizer_symbols.c    @tomasr8
 Python/symtable.c             @JelleZijlstra @carljm
 Lib/_pyrepl/*                 @pablogsal @lysnikolaou @ambv
 Lib/test/test_patma.py        @brandtbucher
@@ -65,6 +73,7 @@ Doc/make.bat                  @AA-Turner @hugovk
 Doc/requirements.txt          @AA-Turner @hugovk
 Doc/_static/**                @AA-Turner @hugovk
 Doc/tools/**                  @AA-Turner @hugovk
+.readthedocs.yml              @AA-Turner
 
 # runtime state/lifecycle
 **/*pylifecycle*              @ericsnowcurrently @ZeroIntensity
@@ -153,6 +162,10 @@ Doc/c-api/module.rst          @ericsnowcurrently
 **/*importlib/resources/*     @jaraco @warsaw @FFY00
 **/*importlib/metadata/*       @jaraco @warsaw
 
+# Calendar
+Lib/calendar.py               @AA-Turner
+Lib/test/test_calendar.py     @AA-Turner
+
 # Dates and times
 **/*datetime*                 @pganssle @abalkin
 **/*str*time*                 @pganssle @abalkin
@@ -188,13 +201,13 @@ Include/internal/pycore_time.h  @pganssle @abalkin
 /Tools/cases_generator/        @markshannon
 
 # AST
-Python/ast.c                  @isidentical @JelleZijlstra @eclips4
-Python/ast_preprocess.c       @isidentical @eclips4
-Parser/asdl.py                @isidentical @JelleZijlstra @eclips4
-Parser/asdl_c.py              @isidentical @JelleZijlstra @eclips4
-Lib/ast.py                    @isidentical @JelleZijlstra @eclips4
-Lib/_ast_unparse.py           @isidentical @JelleZijlstra @eclips4
-Lib/test/test_ast/            @eclips4
+Python/ast.c                  @isidentical @JelleZijlstra @eclips4 @tomasr8
+Python/ast_preprocess.c       @isidentical @eclips4 @tomasr8
+Parser/asdl.py                @isidentical @JelleZijlstra @eclips4 @tomasr8
+Parser/asdl_c.py              @isidentical @JelleZijlstra @eclips4 @tomasr8
+Lib/ast.py                    @isidentical @JelleZijlstra @eclips4 @tomasr8
+Lib/_ast_unparse.py           @isidentical @JelleZijlstra @eclips4 @tomasr8
+Lib/test/test_ast/            @eclips4 @tomasr8
 
 # Mock
 /Lib/unittest/mock.py         @cjw296
@@ -203,6 +216,11 @@ Lib/test/test_ast/            @eclips4
 # multiprocessing
 **/*multiprocessing*          @gpshead
 
+# pydoc
+Lib/pydoc.py                  @AA-Turner
+Lib/pydoc_data/               @AA-Turner
+Lib/test/test_pydoc/          @AA-Turner
+
 # SQLite 3
 **/*sqlite*                   @berkerpeksag @erlend-aasland
 
@@ -215,6 +233,11 @@ Lib/test/test_ast/            @eclips4
 **/*pdb*                      @gaogaotiantian
 **/*bdb*                      @gaogaotiantian
 
+# types
+Lib/test/test_types.py        @AA-Turner
+Lib/types.py                  @AA-Turner
+Modules/_typesmodule.c        @AA-Turner
+
 # Limited C API & stable ABI
 Tools/build/stable_abi.py     @encukou
 Misc/stable_abi.toml          @encukou
@@ -232,6 +255,11 @@ Doc/c-api/stable.rst          @encukou
 /Tools/msi/                   @python/windows-team
 /Tools/nuget/                 @python/windows-team
 
+# Zstandard
+Lib/compression/zstd/         @AA-Turner
+Lib/test/test_zstd.py         @AA-Turner
+Modules/_zstd/                @AA-Turner
+
 # Misc
 **/*itertools*                @rhettinger
 **/*collections*              @rhettinger
@@ -264,6 +292,9 @@ Doc/c-api/stable.rst          @encukou
 
 **/*cjkcodecs*                @corona10
 
+# Patchcheck
+Tools/patchcheck/             @AA-Turner
+
 # macOS
 /Mac/                         @python/macos-team
 **/*osx_support*              @python/macos-team
@@ -275,9 +306,9 @@ Doc/c-api/stable.rst          @encukou
 **/*zipfile/_path/*           @jaraco
 
 # Argument Clinic
-/Tools/clinic/**              @erlend-aasland
-/Lib/test/test_clinic.py      @erlend-aasland
-Doc/howto/clinic.rst          @erlend-aasland
+/Tools/clinic/**              @erlend-aasland @AA-Turner
+/Lib/test/test_clinic.py      @erlend-aasland @AA-Turner
+Doc/howto/clinic.rst          @erlend-aasland @AA-Turner
 
 # Subinterpreters
 **/*interpreteridobject.*     @ericsnowcurrently
@@ -321,6 +352,7 @@ Lib/test/test_configparser.py @jaraco
 
 # Doc sections
 Doc/reference/                @willingc @AA-Turner
+Doc/whatsnew/                 @AA-Turner
 
 **/*weakref*                  @kumaraditya303
 
@@ -334,10 +366,16 @@ Modules/_xxtestfuzz/          @ammaraskar
 # t-strings
 **/*interpolationobject*      @lysnikolaou
 **/*templateobject*           @lysnikolaou
-**/*templatelib*              @lysnikolaou
+**/*templatelib*              @lysnikolaou @AA-Turner
 **/*tstring*                  @lysnikolaou
 
 # Remote debugging
 Python/remote_debug.h         @pablogsal
 Python/remote_debugging.c     @pablogsal
 Modules/_remote_debugging_module.c @pablogsal @ambv @1st1
+
+# gettext
+**/*gettext*                  @tomasr8
+
+# Internal Docs
+InternalDocs/                 @AA-Turner

.github/CONTRIBUTING.rst

@@ -4,7 +4,7 @@ Contributing to Python
 Build Status
 ------------
 
-- `Buildbot status overview <https://buildbot.python.org/all/#/release_status>`_
+- `Buildbot status overview <https://buildbot.python.org/#/release_status>`_
 
 - `GitHub Actions status <https://github.com/python/cpython/actions/workflows/build.yml>`_
 

.github/workflows/build.yml

@@ -260,7 +260,7 @@ jobs:
       free-threading: ${{ matrix.free-threading }}
       os: ${{ matrix.os }}
 
-  build-ubuntu-ssltests:
+  build-ubuntu-ssltests-openssl:
     name: 'Ubuntu SSL tests with OpenSSL'
     runs-on: ${{ matrix.os }}
     timeout-minutes: 60
@@ -322,6 +322,81 @@ jobs:
     - name: SSL tests
       run: ./python Lib/test/ssltests.py
 
+  build-ubuntu-ssltests-awslc:
+    name: 'Ubuntu SSL tests with AWS-LC'
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 60
+    needs: build-context
+    if: needs.build-context.outputs.run-tests == 'true'
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-24.04]
+        awslc_ver: [1.55.0]
+    env:
+      AWSLC_VER: ${{ matrix.awslc_ver}}
+      MULTISSL_DIR: ${{ github.workspace }}/multissl
+      OPENSSL_DIR: ${{ github.workspace }}/multissl/aws-lc/${{ matrix.awslc_ver }}
+      LD_LIBRARY_PATH: ${{ github.workspace }}/multissl/aws-lc/${{ matrix.awslc_ver }}/lib
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        persist-credentials: false
+    - name: Runner image version
+      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
+    - name: Restore config.cache
+      uses: actions/cache@v4
+      with:
+        path: config.cache
+        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
+    - name: Register gcc problem matcher
+      run: echo "::add-matcher::.github/problem-matchers/gcc.json"
+    - name: Install dependencies
+      run: sudo ./.github/workflows/posix-deps-apt.sh
+    - name: Configure SSL lib env vars
+      run: |
+        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
+        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/aws-lc/${AWSLC_VER}" >> "$GITHUB_ENV"
+        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/aws-lc/${AWSLC_VER}/lib" >> "$GITHUB_ENV"
+    - name: 'Restore AWS-LC build'
+      id: cache-aws-lc
+      uses: actions/cache@v4
+      with:
+        path: ./multissl/aws-lc/${{ matrix.awslc_ver }}
+        key: ${{ matrix.os }}-multissl-aws-lc-${{ matrix.awslc_ver }}
+    - name: Install AWS-LC
+      if: steps.cache-aws-lc.outputs.cache-hit != 'true'
+      run: |
+        python3 Tools/ssl/multissltests.py \
+          --steps=library \
+          --base-directory "$MULTISSL_DIR" \
+          --awslc ${{ matrix.awslc_ver }} \
+          --system Linux
+    - name: Add ccache to PATH
+      run: |
+        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
+    - name: Configure ccache action
+      uses: hendrikmuhs/ccache-action@v1.2
+      with:
+        save: false
+    - name: Configure CPython
+      run: |
+        ./configure CFLAGS="-fdiagnostics-format=json" \
+          --config-cache \
+          --enable-slower-safety \
+          --with-pydebug \
+          --with-openssl="$OPENSSL_DIR" \
+          --with-builtin-hashlib-hashes=blake2 \
+          --with-ssl-default-suites=openssl
+    - name: Build CPython
+      run: make -j
+    - name: Display build info
+      run: make pythoninfo
+    - name: Verify python is linked to AWS-LC
+      run: ./python -c 'import ssl; print(ssl.OPENSSL_VERSION)' | grep AWS-LC
+    - name: SSL tests
+      run: ./python Lib/test/ssltests.py
+
   build-wasi:
     name: 'WASI'
     needs: build-context
@@ -510,20 +585,28 @@ jobs:
     - name: Tests
       run: xvfb-run make ci
 
-  build-tsan:
-    name: >-
-      Thread sanitizer
-      ${{ fromJSON(matrix.free-threading) && '(free-threading)' || '' }}
+  build-san:
+    name: >-  # ${{ '' } is a hack to nest jobs under the same sidebar category
+      Sanitizers${{ '' }}
     needs: build-context
     if: needs.build-context.outputs.run-tests == 'true'
     strategy:
       fail-fast: false
       matrix:
+        check-name:
+        - Thread
         free-threading:
         - false
         - true
-    uses: ./.github/workflows/reusable-tsan.yml
+        sanitizer:
+        - TSan
+        include:
+        - check-name: Undefined behavior
+          sanitizer: UBSan
+          free-threading: false
+    uses: ./.github/workflows/reusable-san.yml
     with:
+      sanitizer: ${{ matrix.sanitizer }}
       config_hash: ${{ needs.build-context.outputs.config-hash }}
       free-threading: ${{ matrix.free-threading }}
 
@@ -620,11 +703,12 @@ jobs:
     - build-windows-msi
     - build-macos
     - build-ubuntu
-    - build-ubuntu-ssltests
+    - build-ubuntu-ssltests-awslc
+    - build-ubuntu-ssltests-openssl
     - build-wasi
     - test-hypothesis
     - build-asan
-    - build-tsan
+    - build-san
     - cross-build-linux
     - cifuzz
     if: always()
@@ -635,7 +719,8 @@ jobs:
       with:
         allowed-failures: >-
           build-windows-msi,
-          build-ubuntu-ssltests,
+          build-ubuntu-ssltests-awslc,
+          build-ubuntu-ssltests-openssl,
           test-hypothesis,
           cifuzz,
         allowed-skips: >-
@@ -653,11 +738,12 @@ jobs:
             check-generated-files,
             build-macos,
             build-ubuntu,
-            build-ubuntu-ssltests,
+            build-ubuntu-ssltests-awslc,
+            build-ubuntu-ssltests-openssl,
             build-wasi,
             test-hypothesis,
             build-asan,
-            build-tsan,
+            build-san,
             cross-build-linux,
             '
             || ''

.github/workflows/jit.yml

@@ -5,6 +5,8 @@ on:
       - '**jit**'
       - 'Python/bytecodes.c'
       - 'Python/optimizer*.c'
+      - 'Python/executor_cases.c.h'
+      - 'Python/optimizer_cases.c.h'
       - '!Python/perf_jit_trampoline.c'
       - '!**/*.md'
       - '!**/*.ini'
@@ -13,6 +15,8 @@ on:
       - '**jit**'
       - 'Python/bytecodes.c'
       - 'Python/optimizer*.c'
+      - 'Python/executor_cases.c.h'
+      - 'Python/optimizer_cases.c.h'
       - '!Python/perf_jit_trampoline.c'
       - '!**/*.md'
       - '!**/*.ini'
@@ -113,6 +117,10 @@ jobs:
           find /usr/local/bin -lname '*/Library/Frameworks/Python.framework/*' -delete
           brew install llvm@${{ matrix.llvm }}
           export SDKROOT="$(xcrun --show-sdk-path)"
+          # Set MACOSX_DEPLOYMENT_TARGET and -Werror=unguarded-availability to
+          # make sure we don't break downstream distributors (like uv):
+          export CFLAGS_JIT='-Werror=unguarded-availability'
+          export MACOSX_DEPLOYMENT_TARGET=10.15
           ./configure --enable-experimental-jit --enable-universalsdk --with-universal-archs=universal2 ${{ matrix.debug && '--with-pydebug' || '' }}
           make all --jobs 4
           ./python.exe -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3