Merge branch 'main' into opt-mod-loadattr-103951

Author: skirpichev

.azure-pipelines/ci.yml

@@ -5,7 +5,7 @@ jobs:
   displayName: Pre-build checks
 
   pool:
-    vmImage: ubuntu-22.04
+    vmImage: ubuntu-24.04
 
   steps:
   - template: ./prebuild-checks.yml

.github/workflows/build.yml

@@ -88,7 +88,7 @@ jobs:
     name: 'Check if generated files are up to date'
     # Don't use ubuntu-latest but a specific version to make the job
     # reproducible: to get the same tools versions (autoconf, aclocal, ...)
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     timeout-minutes: 60
     needs: check_source
     if: needs.check_source.outputs.run_tests == 'true'
@@ -237,7 +237,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04]
+        os: [ubuntu-24.04]
         openssl_ver: [3.0.15, 3.1.7, 3.2.3, 3.3.2]
     env:
       OPENSSL_VER: ${{ matrix.openssl_ver }}
@@ -297,7 +297,7 @@ jobs:
 
   test_hypothesis:
     name: "Hypothesis tests on Ubuntu"
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     timeout-minutes: 60
     needs: check_source
     if: needs.check_source.outputs.run_tests == 'true' && needs.check_source.outputs.run_hypothesis == 'true'
@@ -417,7 +417,7 @@ jobs:
     if: needs.check_source.outputs.run_tests == 'true'
     strategy:
       matrix:
-        os: [ubuntu-22.04]
+        os: [ubuntu-24.04]
     env:
       OPENSSL_VER: 3.0.15
       PYTHONSTRICTEXTENSIONBUILD: 1

.github/workflows/jit.yml

@@ -52,7 +52,7 @@ jobs:
           - x86_64-pc-windows-msvc/msvc
           - aarch64-pc-windows-msvc/msvc
           - x86_64-apple-darwin/clang
-          - aarch64-apple-darwin/clang
+          # - aarch64-apple-darwin/clang
           - x86_64-unknown-linux-gnu/gcc
           - x86_64-unknown-linux-gnu/clang
           - aarch64-unknown-linux-gnu/gcc
@@ -79,10 +79,11 @@ jobs:
             architecture: x86_64
             runner: macos-13
             compiler: clang
-          - target: aarch64-apple-darwin/clang
-            architecture: aarch64
-            runner: macos-14
-            compiler: clang
+          # GH-126464: A recent change to either GHA or LLVM broke this job:
+          # - target: aarch64-apple-darwin/clang
+          #   architecture: aarch64
+          #   runner: macos-14
+          #   compiler: clang
           - target: x86_64-unknown-linux-gnu/gcc
             architecture: x86_64
             runner: ubuntu-22.04

.github/workflows/posix-deps-apt.sh

@@ -13,7 +13,6 @@ apt-get -yq install \
     libgdbm-dev \
     libgdbm-compat-dev \
     liblzma-dev \
-    libmpdec-dev \
     libncurses5-dev \
     libreadline6-dev \
     libsqlite3-dev \

.github/workflows/reusable-tsan.yml

@@ -21,7 +21,7 @@ on:
 jobs:
   build_tsan_reusable:
     name: 'Thread sanitizer'
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     timeout-minutes: 60
     steps:
     - uses: actions/checkout@v4

.github/workflows/reusable-ubuntu.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04]
+        os: [ubuntu-24.04]
     env:
       FORCE_COLOR: 1
       OPENSSL_VER: 3.0.15

.github/workflows/reusable-wasi.yml

@@ -11,7 +11,7 @@ jobs:
   build_wasi_reusable:
     name: 'build and test'
     timeout-minutes: 60
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     env:
       WASMTIME_VERSION: 22.0.0
       WASI_SDK_VERSION: 24

Doc/c-api/allocation.rst

@@ -15,10 +15,8 @@ Allocating Objects on the Heap
 .. c:function:: PyObject* PyObject_Init(PyObject *op, PyTypeObject *type)
 
    Initialize a newly allocated object *op* with its type and initial
-   reference.  Returns the initialized object.  If *type* indicates that the
-   object participates in the cyclic garbage detector, it is added to the
-   detector's set of observed objects. Other fields of the object are not
-   affected.
+   reference.  Returns the initialized object.  Other fields of the object are
+   not affected.
 
 
 .. c:function:: PyVarObject* PyObject_InitVar(PyVarObject *op, PyTypeObject *type, Py_ssize_t size)

Doc/library/dis.rst

@@ -1395,6 +1395,13 @@ iterations of the loop.
       This opcode is now only used in situations where the local variable is
       guaranteed to be initialized. It cannot raise :exc:`UnboundLocalError`.
 
+.. opcode:: LOAD_FAST_LOAD_FAST (var_nums)
+
+   Pushes references to ``co_varnames[var_nums >> 4]`` and
+   ``co_varnames[var_nums & 15]`` onto the stack.
+
+   .. versionadded:: 3.13
+
 .. opcode:: LOAD_FAST_CHECK (var_num)
 
    Pushes a reference to the local ``co_varnames[var_num]`` onto the stack,
@@ -1415,6 +1422,20 @@ iterations of the loop.
 
    Stores ``STACK.pop()`` into the local ``co_varnames[var_num]``.
 
+.. opcode:: STORE_FAST_STORE_FAST (var_nums)
+
+   Stores ``STACK[-1]`` into ``co_varnames[var_nums >> 4]``
+   and ``STACK[-2]`` into ``co_varnames[var_nums & 15]``.
+
+   .. versionadded:: 3.13
+
+.. opcode:: STORE_FAST_LOAD_FAST (var_nums)
+
+   Stores ``STACK.pop()`` into the local ``co_varnames[var_nums >> 4]``
+   and pushes a reference to the local ``co_varnames[var_nums & 15]``
+   onto the stack.
+
+   .. versionadded:: 3.13
 
 .. opcode:: DELETE_FAST (var_num)
 

Doc/library/pathlib.rst

@@ -1592,6 +1592,11 @@ Copying, moving and deleting
    This argument has no effect when copying files on Windows (where
    metadata is always preserved).
 
+   .. note::
+      Where supported by the operating system and file system, this method
+      performs a lightweight copy, where data blocks are only copied when
+      modified. This is known as copy-on-write.
+
    .. versionadded:: 3.14