Merge branch 'main' into mbox-from

Author: sebbASF

.github/CODEOWNERS

@@ -309,3 +309,6 @@ Doc/reference/                @willingc @AA-Turner
 # Colorize
 Lib/_colorize.py              @hugovk
 Lib/test/test__colorize.py    @hugovk
+
+# Fuzzing
+Modules/_xxtestfuzz/          @ammaraskar

.github/workflows/build.yml

@@ -185,6 +185,7 @@ jobs:
     needs: build-context
     if: fromJSON(needs.build-context.outputs.run-windows-msi)
     strategy:
+      fail-fast: false
       matrix:
         arch:
         - x86
@@ -236,6 +237,7 @@ jobs:
     needs: build-context
     if: needs.build-context.outputs.run-tests == 'true'
     strategy:
+      fail-fast: false
       matrix:
         bolt:
         - false
@@ -452,6 +454,7 @@ jobs:
     needs: build-context
     if: needs.build-context.outputs.run-tests == 'true'
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-24.04]
     env:
@@ -515,6 +518,7 @@ jobs:
     needs: build-context
     if: needs.build-context.outputs.run-tests == 'true'
     strategy:
+      fail-fast: false
       matrix:
         free-threading:
         - false

.github/workflows/jit.yml

@@ -139,6 +139,7 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 90
     strategy:
+      fail-fast: false
       matrix:
         llvm:
           - 19

.github/workflows/project-updater.yml

@@ -15,6 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     strategy:
+      fail-fast: false
       matrix:
         include:
           # if an issue has any of these labels, it will be added

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

@@ -10,8 +10,7 @@ jobs:
     if: github.repository_owner == 'python'
     runs-on: ubuntu-latest
     permissions:
-      issues: write
-      pull-requests: write
+      pull-requests: read
     timeout-minutes: 10
 
     steps:
@@ -28,8 +27,7 @@ jobs:
     if: github.repository_owner == 'python'
     runs-on: ubuntu-latest
     permissions:
-      issues: write
-      pull-requests: write
+      pull-requests: read
     timeout-minutes: 10
 
     steps:

.github/workflows/tail-call.yml

@@ -2,12 +2,14 @@ name: Tail calling interpreter
 on:
   pull_request:
     paths:
+      - '.github/workflows/tail-call.yml'
       - 'Python/bytecodes.c'
       - 'Python/ceval.c'
       - 'Python/ceval_macros.h'
       - 'Python/generated_cases.c.h'
   push:
     paths:
+      - '.github/workflows/tail-call.yml'
       - 'Python/bytecodes.c'
       - 'Python/ceval.c'
       - 'Python/ceval_macros.h'
@@ -35,7 +37,7 @@ jobs:
         target:
 # Un-comment as we add support for more platforms for tail-calling interpreters.
 #          - i686-pc-windows-msvc/msvc
-#          - x86_64-pc-windows-msvc/msvc
+          - x86_64-pc-windows-msvc/msvc
 #          - aarch64-pc-windows-msvc/msvc
           - x86_64-apple-darwin/clang
           - aarch64-apple-darwin/clang
@@ -48,9 +50,9 @@ jobs:
 #          - target: i686-pc-windows-msvc/msvc
 #            architecture: Win32
 #            runner: windows-latest
-#          - target: x86_64-pc-windows-msvc/msvc
-#            architecture: x64
-#            runner: windows-latest
+          - target: x86_64-pc-windows-msvc/msvc
+            architecture: x64
+            runner: windows-latest
 #          - target: aarch64-pc-windows-msvc/msvc
 #            architecture: ARM64
 #            runner: windows-latest
@@ -79,23 +81,31 @@ jobs:
 
       - name: Native Windows (debug)
         if: runner.os == 'Windows' && matrix.architecture != 'ARM64'
+        shell: cmd
         run: |
-          choco install llvm --allow-downgrade --no-progress --version ${{ matrix.llvm }}.1.0
+          choco install llvm --allow-downgrade --no-progress --version ${{ matrix.llvm }}.1.5
+          set PlatformToolset=clangcl
+          set LLVMToolsVersion=${{ matrix.llvm }}.1.5
+          set LLVMInstallDir=C:\Program Files\LLVM
           ./PCbuild/build.bat --tail-call-interp -d -p ${{ matrix.architecture }}
           ./PCbuild/rt.bat -d -p ${{ matrix.architecture }} -q --multiprocess 0 --timeout 4500 --verbose2 --verbose3
 
       # No tests (yet):
       - name: Emulated Windows (release)
         if: runner.os == 'Windows' && matrix.architecture == 'ARM64'
+        shell: cmd
         run: |
-          choco install llvm --allow-downgrade --no-progress --version ${{ matrix.llvm }}.1.0
+          choco install llvm --allow-downgrade --no-progress --version ${{ matrix.llvm }}.1.5
+          set PlatformToolset=clangcl
+          set LLVMToolsVersion=${{ matrix.llvm }}.1.5
+          set LLVMInstallDir=C:\Program Files\LLVM
           ./PCbuild/build.bat --tail-call-interp -p ${{ matrix.architecture }}
 
         # The `find` line is required as a result of https://github.com/actions/runner-images/issues/9966.
         # This is a bug in the macOS runner image where the pre-installed Python is installed in the same
         # directory as the Homebrew Python, which causes the build to fail for macos-13. This line removes
         # the symlink to the pre-installed Python so that the Homebrew Python is used instead.
-      - name: Native macOS (debug)
+      - name: Native macOS (release)
         if: runner.os == 'macOS'
         run: |
           brew update
@@ -104,16 +114,16 @@ jobs:
           export SDKROOT="$(xcrun --show-sdk-path)"
           export PATH="/opt/homebrew/opt/llvm/bin:$PATH"
           export PATH="/usr/local/opt/llvm/bin:$PATH"
-          CC=clang-19 ./configure --with-tail-call-interp --with-pydebug
+          CC=clang-19 ./configure --with-tail-call-interp
           make all --jobs 4
           ./python.exe -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3
 
-      - name: Native Linux (release)
+      - name: Native Linux (debug)
         if: runner.os == 'Linux' && matrix.target != 'free-threading'
         run: |
           sudo bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" ./llvm.sh ${{ matrix.llvm }}
           export PATH="$(llvm-config-${{ matrix.llvm }} --bindir):$PATH"
-          CC=clang-19 ./configure --with-tail-call-interp
+          CC=clang-19 ./configure --with-tail-call-interp --with-pydebug
           make all --jobs 4
           ./python -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3
 

Doc/c-api/allocation.rst

@@ -35,6 +35,10 @@ Allocating Objects on the Heap
    The size of the memory allocation is determined from the
    :c:member:`~PyTypeObject.tp_basicsize` field of the type object.
 
+   Note that this function is unsuitable if *typeobj* has
+   :c:macro:`Py_TPFLAGS_HAVE_GC` set. For such objects,
+   use :c:func:`PyObject_GC_New` instead.
+
 
 .. c:macro:: PyObject_NewVar(TYPE, typeobj, size)
 
@@ -49,6 +53,10 @@ Allocating Objects on the Heap
    fields into the same allocation decreases the number of allocations,
    improving the memory management efficiency.
 
+   Note that this function is unsuitable if *typeobj* has
+   :c:macro:`Py_TPFLAGS_HAVE_GC` set. For such objects,
+   use :c:func:`PyObject_GC_NewVar` instead.
+
 
 .. c:function:: void PyObject_Del(void *op)
 

Doc/c-api/arg.rst

@@ -5,7 +5,7 @@
 Parsing arguments and building values
 =====================================
 
-These functions are useful when creating your own extensions functions and
+These functions are useful when creating your own extension functions and
 methods.  Additional information and examples are available in
 :ref:`extending-index`.
 

Doc/c-api/init_config.rst

@@ -505,6 +505,10 @@ Configuration Options
      - :c:member:`use_hash_seed <PyConfig.use_hash_seed>`
      - ``bool``
      - Read-only
+   * - ``"use_system_logger"``
+     - :c:member:`use_system_logger <PyConfig.use_system_logger>`
+     - ``bool``
+     - Read-only
    * - ``"user_site_directory"``
      - :c:member:`user_site_directory <PyConfig.user_site_directory>`
      - ``bool``
@@ -1927,9 +1931,10 @@ PyConfig
 
       Only available on macOS 10.12 and later, and on iOS.
 
-      Default: ``0`` (don't use system log).
+      Default: ``0`` (don't use the system log) on macOS; ``1`` on iOS (use the
+      system log).
 
-      .. versionadded:: 3.13.2
+      .. versionadded:: 3.14
 
    .. c:member:: int user_site_directory
 

Doc/c-api/intro.rst

@@ -30,6 +30,16 @@ familiar with writing an extension before  attempting to embed Python in a real
 application.
 
 
+Language version compatibility
+==============================
+
+Python's C API is compatible with C11 and C++11 versions of C and C++.
+
+This is a lower limit: the C API does not require features from later
+C/C++ versions.
+You do *not* need to enable your compiler's "c11 mode".
+
+
 Coding standards
 ================