Misc/NEWS.d/3.12.0a6.rst - external/github.com/python/cpython - Git at Google

 .. date: 2023-02-17-10-42-48
 .. gh-issue: 99108
 .. nonce: MKA8-f
 .. release date: 2023-03-07
 .. section: Security

 Replace builtin hashlib implementations of MD5 and SHA1 with verified ones
 from the HACL* project.

 ..

 .. date: 2023-02-08-22-03-04
 .. gh-issue: 101727
 .. nonce: 9P5eZz
 .. section: Security

 Updated the OpenSSL version used in Windows and macOS binary release builds
 to 1.1.1t to address :cve:`2023-0286`, :cve:`2022-4303`, and :cve:`2022-4303` per
 `the OpenSSL 2023-02-07 security advisory
 <https://openssl-library.org/news/secadv/20230207.txt>`_.

 ..

 .. date: 2023-02-08-12-57-35
 .. gh-issue: 99108
 .. nonce: 6tnmhA
 .. section: Security

 Replace the builtin :mod:`hashlib` implementations of SHA2-384 and SHA2-512
 originally from LibTomCrypt with formally verified, side-channel resistant
 code from the `HACL* <https://github.com/hacl-star/hacl-star/>`_ project.
 The builtins remain a fallback only used when OpenSSL does not provide them.

 ..

 .. date: 2023-01-24-16-12-00
 .. gh-issue: 101283
 .. nonce: 9tqu39
 .. section: Security

 :class:`subprocess.Popen` now uses a safer approach to find ``cmd.exe`` when
 launching with ``shell=True``. Patch by Eryk Sun, based on a patch by Oleg
 Iarygin.

 ..

 .. date: 2023-03-07-16-56-28
 .. gh-issue: 102493
 .. nonce: gTXrcD
 .. section: Core and Builtins

 Fix regression in semantics of normalisation in ``PyErr_SetObject``.

 ..

 .. date: 2023-03-06-13-05-33
 .. gh-issue: 102416
 .. nonce: dz6K5f
 .. section: Core and Builtins

 Do not memoize incorrectly automatically generated loop rules in the parser.
 Patch by Pablo Galindo.

 ..

 .. date: 2023-03-04-20-56-12
 .. gh-issue: 102356
 .. nonce: 07KvUd
 .. section: Core and Builtins

 Fix a bug that caused a crash when deallocating deeply nested filter
 objects. Patch by Marta Gómez Macías.

 ..

 .. date: 2023-02-28-21-17-03
 .. gh-issue: 102336
 .. nonce: -wL3Tm
 .. section: Core and Builtins

 Cleanup Windows 7 specific special handling. Patch by Max Bachmann.

 ..

 .. date: 2023-02-26-23-10-32
 .. gh-issue: 102250
 .. nonce: 7MUKoC
 .. section: Core and Builtins

 Fixed a segfault occurring when the interpreter calls a ``__bool__`` method
 that raises.

 ..

 .. date: 2023-02-24-17-59-39
 .. gh-issue: 102126
 .. nonce: HTT8Vc
 .. section: Core and Builtins

 Fix deadlock at shutdown when clearing thread states if any finalizer tries
 to acquire the runtime head lock. Patch by Kumar Aditya.

 ..

 .. date: 2023-02-22-15-15-32
 .. gh-issue: 102027
 .. nonce: Km4G-d
 .. section: Core and Builtins

 Use ``GetCurrentProcessId`` on Windows when ``getpid`` is unavailable. Patch
 by Max Bachmann.

 ..

 .. date: 2023-02-20-15-18-33
 .. gh-issue: 102056
 .. nonce: uHKuwH
 .. section: Core and Builtins

 Fix error handling bugs in interpreter's exception printing code, which
 could cause a crash on infinite recursion.

 ..

 .. date: 2023-02-17-10-12-13
 .. gh-issue: 100982
 .. nonce: mJGJQw
 .. section: Core and Builtins

 Restrict the scope of the :opcode:`FOR_ITER_RANGE` instruction to the scope
 of the original :opcode:`FOR_ITER` instruction, to allow instrumentation.

 ..

 .. date: 2023-02-16-23-19-01
 .. gh-issue: 101967
 .. nonce: Kqr1dz
 .. section: Core and Builtins

 Fix possible segfault in ``positional_only_passed_as_keyword`` function,
 when new list created.

 ..

 .. date: 2023-02-16-16-57-23
 .. gh-issue: 101952
 .. nonce: Zo1dlq
 .. section: Core and Builtins

 Fix possible segfault in ``BUILD_SET`` opcode, when new set created.

 ..

 .. date: 2023-02-13-22-21-58
 .. gh-issue: 74895
 .. nonce: esMNtq
 .. section: Core and Builtins

 :mod:`socket.getaddrinfo` no longer raises :class:`OverflowError` for
 :class:`int` **port** values outside of the C long range. Out of range
 values are left up to the underlying string based C library API to report. A
 :class:`socket.gaierror` ``SAI_SERVICE`` may occur instead, or no error at
 all as not all platform C libraries generate an error.

 ..

 .. date: 2023-02-13-18-21-14
 .. gh-issue: 101799
 .. nonce: wpHbCn
 .. section: Core and Builtins

 Add :opcode:`CALL_INTRINSIC_2` and use it instead of
 :opcode:`!PREP_RERAISE_STAR`.

 ..

 .. date: 2023-02-12-22-40-22
 .. gh-issue: 101857
 .. nonce: _bribG
 .. section: Core and Builtins

 Fix xattr support detection on Linux systems by widening the check to linux,
 not just glibc. This fixes support for musl.

 ..

 .. date: 2023-02-11-23-14-06
 .. gh-issue: 84783
 .. nonce: _P5sMa
 .. section: Core and Builtins

 Make the slice object hashable. Patch by Will Bradshaw and Furkan Onder.

 ..

 .. date: 2023-02-10-15-54-57
 .. gh-issue: 87849
 .. nonce: IUVvPz
 .. section: Core and Builtins

 Change the ``SEND`` instruction to leave the receiver on the stack. This
 allows the specialized form of ``SEND`` to skip the chain of C calls and
 jump directly to the ``RESUME`` in the generator or coroutine.

 ..

 .. date: 2023-02-10-07-21-47
 .. gh-issue: 101765
 .. nonce: MO5LlC
 .. section: Core and Builtins

 Fix SystemError / segmentation fault in iter ``__reduce__`` when internal
 access of ``builtins.__dict__`` keys mutates the iter object.

 ..

 .. date: 2023-02-10-01-15-57
 .. gh-issue: 101430
 .. nonce: T3Gegb
 .. section: Core and Builtins

 Update :mod:`tracemalloc` to handle presize of object properly. Patch by
 Donghee Na.

 ..

 .. date: 2023-02-08-17-13-31
 .. gh-issue: 101696
 .. nonce: seJhTt
 .. section: Core and Builtins

 Invalidate type version tag in ``_PyStaticType_Dealloc`` for static types,
 avoiding bug where a false cache hit could crash the interpreter. Patch by
 Kumar Aditya.

 ..

 .. date: 2023-02-07-14-56-43
 .. gh-issue: 101632
 .. nonce: Fd1yxk
 .. section: Core and Builtins

 Adds a new :opcode:`RETURN_CONST` instruction.

 ..

 .. date: 2023-01-04-12-49-33
 .. gh-issue: 100719
 .. nonce: uRPccL
 .. section: Core and Builtins

 Remove gi_code field from generator (and coroutine and async generator)
 objects as it is redundant. The frame already includes a reference to the
 code object.

 ..

 .. date: 2022-11-02-20-23-47
 .. gh-issue: 98627
 .. nonce: VJkdRM
 .. section: Core and Builtins

 When an interpreter is configured to check (and only then), importing an
 extension module will now fail when the extension does not support multiple
 interpreters (i.e. doesn't implement PEP 489 multi-phase init). This does
 not apply to the main interpreter, nor to subinterpreters created with
 ``Py_NewInterpreter()``.

 ..

 .. date: 2023-03-04-14-46-47
 .. gh-issue: 102302
 .. nonce: -b_s6Z
 .. section: Library

 Micro-optimise hashing of :class:`inspect.Parameter`, reducing the time it
 takes to hash an instance by around 40%.

 ..

 .. date: 2023-02-28-09-52-25
 .. gh-issue: 101979
 .. nonce: or3hXV
 .. section: Library

 Fix a bug where parentheses in the ``metavar`` argument to
 :meth:`argparse.ArgumentParser.add_argument` were dropped. Patch by Yeojin
 Kim.

 ..

 .. date: 2023-02-26-12-37-17
 .. gh-issue: 91038
 .. nonce: S4rFH_
 .. section: Library

 :meth:`platform.platform` now has boolean default arguments.

 ..

 .. date: 2023-02-23-20-39-52
 .. gh-issue: 81652
 .. nonce: Vxz0Mr
 .. section: Library

 Add :const:`mmap.MAP_ALIGNED_SUPER` FreeBSD and :const:`mmap.MAP_CONCEAL`
 OpenBSD constants to :mod:`mmap`. Patch by Yeojin Kim.

 ..

 .. date: 2023-02-23-15-06-01
 .. gh-issue: 102179
 .. nonce: P6KQ4c
 .. section: Library

 Fix :func:`os.dup2` error message for negative fds.

 ..

 .. date: 2023-02-21-10-05-33
 .. gh-issue: 101961
 .. nonce: 7e56jh
 .. section: Library

 For the binary mode, :func:`fileinput.hookcompressed` doesn't set the
 ``encoding`` value even if the value is ``None``. Patch by Gihwan Kim.

 ..

 .. date: 2023-02-21-07-15-41
 .. gh-issue: 101936
 .. nonce: QVOxHH
 .. section: Library

 The default value of ``fp`` becomes :class:`io.BytesIO` if
 :exc:`~urllib.error.HTTPError` is initialized without a designated ``fp``
 parameter. Patch by Long Vo.

 ..

 .. date: 2023-02-17-20-24-15
 .. gh-issue: 101566
 .. nonce: FjgWBt
 .. section: Library

 In zipfile, sync Path with `zipp 3.14
 <https://zipp.readthedocs.io/en/latest/history.html#v3-14-0>`_, including
 fix for extractall on the underlying zipfile after being wrapped in
 ``Path``.

 ..

 .. date: 2023-02-17-19-00-58
 .. gh-issue: 97930
 .. nonce: C_nQjb
 .. section: Library

 Apply changes from `importlib_resources 5.12
 <https://importlib-resources.readthedocs.io/en/latest/history.html#v5-12-0>`_,
 including fix for ``MultiplexedPath`` to support directories in multiple
 namespaces (python/importlib_resources#265).

 ..

 .. date: 2023-02-17-18-44-27
 .. gh-issue: 101997
 .. nonce: A6_blD
 .. section: Library

 Upgrade pip wheel bundled with ensurepip (pip 23.0.1)

 ..

 .. date: 2023-02-15-01-54-06
 .. gh-issue: 99108
 .. nonce: rjTSic
 .. section: Library

 The built-in extension modules for :mod:`hashlib` SHA2 algorithms, used when
 OpenSSL does not provide them, now live in a single internal ``_sha2``
 module instead of separate ``_sha256`` and ``_sha512`` modules.

 ..

 .. date: 2023-02-14-09-08-48
 .. gh-issue: 101892
 .. nonce: FMos8l
 .. section: Library

 Callable iterators no longer raise :class:`SystemError` when the callable
 object exhausts the iterator but forgets to either return a sentinel value
 or raise :class:`StopIteration`.

 ..

 .. date: 2023-02-13-12-55-48
 .. gh-issue: 87634
 .. nonce: q-SBhJ
 .. section: Library

 Remove locking behavior from :func:`functools.cached_property`.

 ..

 .. date: 2023-02-11-13-23-29
 .. gh-issue: 97786
 .. nonce: QjvQ1B
 .. section: Library

 Fix potential undefined behaviour in corner cases of floating-point-to-time
 conversions.

 ..

 .. date: 2023-02-10-16-02-29
 .. gh-issue: 101517
 .. nonce: r7S2u8
 .. section: Library

 Fixed bug where :mod:`bdb` looks up the source line with :mod:`linecache`
 with a ``lineno=None``, which causes it to fail with an unhandled exception.

 ..

 .. date: 2023-02-10-11-59-13
 .. gh-issue: 101773
 .. nonce: J_kI7y
 .. section: Library

 Optimize :class:`fractions.Fraction` for small components. The private
 argument ``_normalize`` of the :class:`fractions.Fraction` constructor has
 been removed.

 ..

 .. date: 2023-02-08-18-20-58
 .. gh-issue: 101693
 .. nonce: 4_LPXj
 .. section: Library

 In :meth:`sqlite3.Cursor.execute`, :exc:`DeprecationWarning` is now emitted
 when :ref:`named placeholders <sqlite3-placeholders>` are used together with
 parameters supplied as a :term:`sequence` instead of as a :class:`dict`.
 Starting from Python 3.14, using named placeholders with parameters supplied
 as a sequence will raise a :exc:`~sqlite3.ProgrammingError`. Patch by Erlend
 E. Aasland.

 ..

 .. date: 2023-02-07-22-21-46
 .. gh-issue: 101446
 .. nonce: -c0FdK
 .. section: Library

 Change repr of :class:`collections.OrderedDict` to use regular dictionary
 formatting instead of pairs of keys and values.

 ..

 .. date: 2023-02-07-22-20-32
 .. gh-issue: 101362
 .. nonce: Jlk6mt
 .. section: Library

 Speed up :class:`pathlib.PurePath` construction by handling arguments more
 uniformly. When a :class:`pathlib.Path` argument is supplied, we use its
 string representation rather than joining its parts with
 :func:`os.path.join`.

 ..

 .. date: 2023-02-07-21-16-41
 .. gh-issue: 101362
 .. nonce: KMQllM
 .. section: Library

 Speed up :class:`pathlib.PurePath` construction by calling
 :func:`os.path.join` only when two or more arguments are given.

 ..

 .. date: 2023-02-07-20-46-08
 .. gh-issue: 101362
 .. nonce: 2ckZ6R
 .. section: Library

 Speed up :class:`pathlib.Path` construction by running the path flavour
 compatibility check only when pathlib is imported.

 ..

 .. date: 2023-02-05-21-40-15
 .. gh-issue: 85984
 .. nonce: Kfzbb2
 .. section: Library

 Refactored the implementation of :func:`pty.fork` to use
 :func:`os.login_tty`.

 A :exc:`DeprecationWarning` is now raised by ``pty.master_open()`` and
 ``pty.slave_open()``. They were undocumented and deprecated long long ago in
 the docstring in favor of :func:`pty.openpty`.

 ..

 .. date: 2023-02-04-16-35-46
 .. gh-issue: 101561
 .. nonce: Xo6pIZ
 .. section: Library

 Add a new decorator :func:`typing.override`. See :pep:`698` for details.
 Patch by Steven Troxler.

 ..

 .. date: 2023-02-01-10-42-16
 .. gh-issue: 63301
 .. nonce: XNxSFh
 .. section: Library

 Set exit code when :mod:`tabnanny` CLI exits on error.

 ..

 .. date: 2023-01-27-02-53-50
 .. gh-issue: 101360
 .. nonce: bPB7SL
 .. section: Library

 Fix anchor matching in :meth:`pathlib.PureWindowsPath.match`. Path and
 pattern anchors are now matched with :mod:`fnmatch`, just like other path
 parts. This allows patterns such as ``"*:/Users/*"`` to be matched.

 ..

 .. date: 2023-01-25-00-14-52
 .. gh-issue: 101277
 .. nonce: FceHX7
 .. section: Library

 Remove global state from :mod:`itertools` module (:pep:`687`). Patches by
 Erlend E. Aasland.

 ..

 .. date: 2023-01-06-21-14-41
 .. gh-issue: 100809
 .. nonce: I697UT
 .. section: Library

 Fix handling of drive-relative paths (like 'C:' and 'C:foo') in
 :meth:`pathlib.Path.absolute`. This method now uses the OS API to retrieve
 the correct current working directory for the drive.

 ..

 .. date: 2023-01-02-22-41-44
 .. gh-issue: 99138
 .. nonce: 17hp9U
 .. section: Library

 Apply :pep:`687` to :mod:`zoneinfo`. Patch by Erlend E. Aasland.

 ..

 .. date: 2022-10-22-09-26-43
 .. gh-issue: 96764
 .. nonce: Dh9Y5L
 .. section: Library

 :func:`asyncio.wait_for` now uses :func:`asyncio.timeout` as its underlying
 implementation. Patch by Kumar Aditya.

 ..

 .. date: 2022-09-05-12-17-34
 .. gh-issue: 88233
 .. nonce: gff9qJ
 .. section: Library

 Correctly preserve "extra" fields in ``zipfile`` regardless of their
 ordering relative to a zip64 "extra."

 ..

 .. bpo: 23224
 .. date: 2018-06-20-09-12-21
 .. nonce: zxCQ13
 .. section: Library

 Fix segfaults when creating :class:`lzma.LZMADecompressor` and
 :class:`bz2.BZ2Decompressor` objects without calling ``__init__()``, and fix
 leakage of locks and internal buffers when calling the ``__init__()``
 methods of :class:`lzma.LZMADecompressor`, :class:`lzma.LZMACompressor`,
 :class:`bz2.BZ2Compressor`, and :class:`bz2.BZ2Decompressor` objects
 multiple times.

 ..

 .. date: 2023-02-19-10-33-01
 .. gh-issue: 85417
 .. nonce: kYO8u3
 .. section: Documentation

 Update :mod:`cmath` documentation to clarify behaviour on branch cuts.

 ..

 .. date: 2023-02-07-21-43-24
 .. gh-issue: 97725
 .. nonce: cuY7Cd
 .. section: Documentation

 Fix :meth:`asyncio.Task.print_stack` description for ``file=None``. Patch by
 Oleg Iarygin.

 ..

 .. date: 2023-02-18-10-51-02
 .. gh-issue: 102019
 .. nonce: 0797SJ
 .. section: Tests

 Fix deadlock on shutdown if ``test_current_{exception,frames}`` fails. Patch
 by Jacob Bower.

 ..

 .. date: 2023-02-11-22-36-10
 .. gh-issue: 85984
 .. nonce: EVXjT9
 .. section: Tests

 Utilize new "winsize" functions from termios in pty tests.

 ..

 .. date: 2023-02-11-20-28-08
 .. gh-issue: 89792
 .. nonce: S-Y5BZ
 .. section: Tests

 ``test_tools`` now copies up to 10x less source data to a temporary
 directory during the ``freeze`` test by ignoring git metadata and other
 artifacts.  It also limits its python build parallelism based on
 os.cpu_count instead of hard coding it as 8 cores.

 ..

 .. date: 2023-01-12-00-49-16
 .. gh-issue: 99942
 .. nonce: DUR8b4
 .. section: Build

 On Android, in a static build, python-config in embed mode no longer
 incorrectly reports a library to link to.

 ..

 .. date: 2022-12-20-01-06-17
 .. gh-issue: 99942
 .. nonce: lbmzYj
 .. section: Build

 On Android, python.pc now correctly reports the library to link to, the same
 as python-config.sh.

 ..

 .. date: 2022-12-18-08-33-28
 .. gh-issue: 100221
 .. nonce: K94Ct3
 .. section: Build

 Fix creating install directories in ``make sharedinstall`` if they exist
 outside ``DESTDIR`` already.

 ..

 .. date: 2022-09-14-10-38-15
 .. gh-issue: 96821
 .. nonce: Zk2a9c
 .. section: Build

 Explicitly mark C extension modules that need defined signed integer
 overflow, and add a configure option :option:`--with-strict-overflow`. Patch
 by Matthias Görgens and Shantanu Jain.

 ..

 .. date: 2023-03-01-01-36-39
 .. gh-issue: 102344
 .. nonce: Dgfux4
 .. section: Windows

 Implement ``winreg.QueryValue`` using ``QueryValueEx`` and
 ``winreg.SetValue`` using ``SetValueEx``. Patch by Max Bachmann.

 ..

 .. date: 2023-02-15-11-08-10
 .. gh-issue: 101881
 .. nonce: fScr3m
 .. section: Windows

 Handle read and write operations on non-blocking pipes properly on Windows.

 ..

 .. date: 2023-02-13-18-05-49
 .. gh-issue: 101881
 .. nonce: _TnHzN
 .. section: Windows

 Add support for the os.get_blocking() and os.set_blocking() functions on
 Windows.

 ..

 .. date: 2023-02-13-16-32-50
 .. gh-issue: 101849
 .. nonce: 7lm_53
 .. section: Windows

 Ensures installer will correctly upgrade existing ``py.exe`` launcher
 installs.

 ..

 .. date: 2023-02-10-14-26-05
 .. gh-issue: 101763
 .. nonce: RPaj7r
 .. section: Windows

 Updates copy of libffi bundled with Windows installs to 3.4.4.

 ..

 .. date: 2023-02-09-22-09-27
 .. gh-issue: 101759
 .. nonce: zFlqSH
 .. section: Windows

 Update Windows installer to SQLite 3.40.1.

 ..

 .. date: 2023-02-07-18-22-54
 .. gh-issue: 101614
 .. nonce: NjVP0n
 .. section: Windows

 Correctly handle extensions built against debug binaries that reference
 ``python3_d.dll``.

 ..

 .. date: 2023-01-25-11-33-54
 .. gh-issue: 101196
 .. nonce: wAX_2g
 .. section: Windows

 The functions ``os.path.isdir``, ``os.path.isfile``, ``os.path.islink`` and
 ``os.path.exists`` are now 13% to 28% faster on Windows, by making fewer
 Win32 API calls.

 ..

 .. date: 2023-02-09-22-07-17
 .. gh-issue: 101759
 .. nonce: B0JP2H
 .. section: macOS

 Update macOS installer to SQLite 3.40.1.

 ..

 .. date: 2023-02-14-15-53-01
 .. gh-issue: 101907
 .. nonce: HgF1N2
 .. section: C API

 Removes use of non-standard C++ extension in public header files.

 ..

 .. date: 2023-02-09-10-38-20
 .. gh-issue: 99293
 .. nonce: mFqfpp
 .. section: C API

 Document that the Py_TPFLAGS_VALID_VERSION_TAG is an internal feature,
 should not be used, and will be removed.

 ..

 .. date: 2023-02-06-16-14-30
 .. gh-issue: 101578
 .. nonce: PW5fA9
 .. section: C API

 Add :c:func:`PyErr_GetRaisedException` and
 :c:func:`PyErr_SetRaisedException` for saving and restoring the current
 exception. These functions return and accept a single exception object,
 rather than the triple arguments of the now-deprecated :c:func:`PyErr_Fetch`
 and :c:func:`PyErr_Restore`. This is less error prone and a bit more
 efficient.

 Add :c:func:`PyException_GetArgs` and :c:func:`PyException_SetArgs` as
 convenience functions for retrieving and modifying the
 :attr:`~BaseException.args` passed to the exception's constructor.

 ..

 .. date: 2022-04-21-17-25-22
 .. gh-issue: 91744
 .. nonce: FgvaMi
 .. section: C API

 Introduced the *Unstable C API tier*, marking APi that is allowed to change
 in minor releases without a deprecation period. See :pep:`689` for details.
	.. date: 2023-02-17-10-42-48
	.. gh-issue: 99108
	.. nonce: MKA8-f
	.. release date: 2023-03-07
	.. section: Security

	Replace builtin hashlib implementations of MD5 and SHA1 with verified ones
	from the HACL* project.

	..

	.. date: 2023-02-08-22-03-04
	.. gh-issue: 101727
	.. nonce: 9P5eZz
	.. section: Security

	Updated the OpenSSL version used in Windows and macOS binary release builds
	to 1.1.1t to address :cve:`2023-0286`, :cve:`2022-4303`, and :cve:`2022-4303` per
	`the OpenSSL 2023-02-07 security advisory
	<https://openssl-library.org/news/secadv/20230207.txt>`_.

	..

	.. date: 2023-02-08-12-57-35
	.. gh-issue: 99108
	.. nonce: 6tnmhA
	.. section: Security

	Replace the builtin :mod:`hashlib` implementations of SHA2-384 and SHA2-512
	originally from LibTomCrypt with formally verified, side-channel resistant
	code from the `HACL* <https://github.com/hacl-star/hacl-star/>`_ project.
	The builtins remain a fallback only used when OpenSSL does not provide them.

	..

	.. date: 2023-01-24-16-12-00
	.. gh-issue: 101283
	.. nonce: 9tqu39
	.. section: Security

	:class:`subprocess.Popen` now uses a safer approach to find ``cmd.exe`` when
	launching with ``shell=True``. Patch by Eryk Sun, based on a patch by Oleg
	Iarygin.

	..

	.. date: 2023-03-07-16-56-28
	.. gh-issue: 102493
	.. nonce: gTXrcD
	.. section: Core and Builtins

	Fix regression in semantics of normalisation in ``PyErr_SetObject``.

	..

	.. date: 2023-03-06-13-05-33
	.. gh-issue: 102416
	.. nonce: dz6K5f
	.. section: Core and Builtins

	Do not memoize incorrectly automatically generated loop rules in the parser.
	Patch by Pablo Galindo.

	..

	.. date: 2023-03-04-20-56-12
	.. gh-issue: 102356
	.. nonce: 07KvUd
	.. section: Core and Builtins

	Fix a bug that caused a crash when deallocating deeply nested filter
	objects. Patch by Marta Gómez Macías.

	..

	.. date: 2023-02-28-21-17-03
	.. gh-issue: 102336
	.. nonce: -wL3Tm
	.. section: Core and Builtins

	Cleanup Windows 7 specific special handling. Patch by Max Bachmann.

	..

	.. date: 2023-02-26-23-10-32
	.. gh-issue: 102250
	.. nonce: 7MUKoC
	.. section: Core and Builtins

	Fixed a segfault occurring when the interpreter calls a ``__bool__`` method
	that raises.

	..

	.. date: 2023-02-24-17-59-39
	.. gh-issue: 102126
	.. nonce: HTT8Vc
	.. section: Core and Builtins

	Fix deadlock at shutdown when clearing thread states if any finalizer tries
	to acquire the runtime head lock. Patch by Kumar Aditya.

	..

	.. date: 2023-02-22-15-15-32
	.. gh-issue: 102027
	.. nonce: Km4G-d
	.. section: Core and Builtins

	Use ``GetCurrentProcessId`` on Windows when ``getpid`` is unavailable. Patch
	by Max Bachmann.

	..

	.. date: 2023-02-20-15-18-33
	.. gh-issue: 102056
	.. nonce: uHKuwH
	.. section: Core and Builtins

	Fix error handling bugs in interpreter's exception printing code, which
	could cause a crash on infinite recursion.

	..

	.. date: 2023-02-17-10-12-13
	.. gh-issue: 100982
	.. nonce: mJGJQw
	.. section: Core and Builtins

	Restrict the scope of the :opcode:`FOR_ITER_RANGE` instruction to the scope
	of the original :opcode:`FOR_ITER` instruction, to allow instrumentation.

	..

	.. date: 2023-02-16-23-19-01
	.. gh-issue: 101967
	.. nonce: Kqr1dz
	.. section: Core and Builtins

	Fix possible segfault in ``positional_only_passed_as_keyword`` function,
	when new list created.

	..

	.. date: 2023-02-16-16-57-23
	.. gh-issue: 101952
	.. nonce: Zo1dlq
	.. section: Core and Builtins

	Fix possible segfault in ``BUILD_SET`` opcode, when new set created.

	..

	.. date: 2023-02-13-22-21-58
	.. gh-issue: 74895
	.. nonce: esMNtq
	.. section: Core and Builtins

	:mod:`socket.getaddrinfo` no longer raises :class:`OverflowError` for
	:class:`int` port values outside of the C long range. Out of range
	values are left up to the underlying string based C library API to report. A
	:class:`socket.gaierror` ``SAI_SERVICE`` may occur instead, or no error at
	all as not all platform C libraries generate an error.

	..

	.. date: 2023-02-13-18-21-14
	.. gh-issue: 101799
	.. nonce: wpHbCn
	.. section: Core and Builtins

	Add :opcode:`CALL_INTRINSIC_2` and use it instead of
	:opcode:`!PREP_RERAISE_STAR`.

	..

	.. date: 2023-02-12-22-40-22
	.. gh-issue: 101857
	.. nonce: _bribG
	.. section: Core and Builtins

	Fix xattr support detection on Linux systems by widening the check to linux,
	not just glibc. This fixes support for musl.

	..

	.. date: 2023-02-11-23-14-06
	.. gh-issue: 84783
	.. nonce: _P5sMa
	.. section: Core and Builtins

	Make the slice object hashable. Patch by Will Bradshaw and Furkan Onder.

	..

	.. date: 2023-02-10-15-54-57
	.. gh-issue: 87849
	.. nonce: IUVvPz
	.. section: Core and Builtins

	Change the ``SEND`` instruction to leave the receiver on the stack. This
	allows the specialized form of ``SEND`` to skip the chain of C calls and
	jump directly to the ``RESUME`` in the generator or coroutine.

	..

	.. date: 2023-02-10-07-21-47
	.. gh-issue: 101765
	.. nonce: MO5LlC
	.. section: Core and Builtins

	Fix SystemError / segmentation fault in iter ``__reduce__`` when internal
	access of ``builtins.__dict__`` keys mutates the iter object.

	..

	.. date: 2023-02-10-01-15-57
	.. gh-issue: 101430
	.. nonce: T3Gegb
	.. section: Core and Builtins

	Update :mod:`tracemalloc` to handle presize of object properly. Patch by
	Donghee Na.

	..

	.. date: 2023-02-08-17-13-31
	.. gh-issue: 101696
	.. nonce: seJhTt
	.. section: Core and Builtins

	Invalidate type version tag in ``_PyStaticType_Dealloc`` for static types,
	avoiding bug where a false cache hit could crash the interpreter. Patch by
	Kumar Aditya.

	..

	.. date: 2023-02-07-14-56-43
	.. gh-issue: 101632
	.. nonce: Fd1yxk
	.. section: Core and Builtins

	Adds a new :opcode:`RETURN_CONST` instruction.

	..

	.. date: 2023-01-04-12-49-33
	.. gh-issue: 100719
	.. nonce: uRPccL
	.. section: Core and Builtins

	Remove gi_code field from generator (and coroutine and async generator)
	objects as it is redundant. The frame already includes a reference to the
	code object.

	..

	.. date: 2022-11-02-20-23-47
	.. gh-issue: 98627
	.. nonce: VJkdRM
	.. section: Core and Builtins

	When an interpreter is configured to check (and only then), importing an
	extension module will now fail when the extension does not support multiple
	interpreters (i.e. doesn't implement PEP 489 multi-phase init). This does
	not apply to the main interpreter, nor to subinterpreters created with
	``Py_NewInterpreter()``.

	..

	.. date: 2023-03-04-14-46-47
	.. gh-issue: 102302
	.. nonce: -b_s6Z
	.. section: Library

	Micro-optimise hashing of :class:`inspect.Parameter`, reducing the time it
	takes to hash an instance by around 40%.

	..

	.. date: 2023-02-28-09-52-25
	.. gh-issue: 101979
	.. nonce: or3hXV
	.. section: Library

	Fix a bug where parentheses in the ``metavar`` argument to
	:meth:`argparse.ArgumentParser.add_argument` were dropped. Patch by Yeojin
	Kim.

	..

	.. date: 2023-02-26-12-37-17
	.. gh-issue: 91038
	.. nonce: S4rFH_
	.. section: Library

	:meth:`platform.platform` now has boolean default arguments.

	..

	.. date: 2023-02-23-20-39-52
	.. gh-issue: 81652
	.. nonce: Vxz0Mr
	.. section: Library

	Add :const:`mmap.MAP_ALIGNED_SUPER` FreeBSD and :const:`mmap.MAP_CONCEAL`
	OpenBSD constants to :mod:`mmap`. Patch by Yeojin Kim.

	..

	.. date: 2023-02-23-15-06-01
	.. gh-issue: 102179
	.. nonce: P6KQ4c
	.. section: Library

	Fix :func:`os.dup2` error message for negative fds.

	..

	.. date: 2023-02-21-10-05-33
	.. gh-issue: 101961
	.. nonce: 7e56jh
	.. section: Library

	For the binary mode, :func:`fileinput.hookcompressed` doesn't set the
	``encoding`` value even if the value is ``None``. Patch by Gihwan Kim.

	..

	.. date: 2023-02-21-07-15-41
	.. gh-issue: 101936
	.. nonce: QVOxHH
	.. section: Library

	The default value of ``fp`` becomes :class:`io.BytesIO` if
	:exc:`~urllib.error.HTTPError` is initialized without a designated ``fp``
	parameter. Patch by Long Vo.

	..

	.. date: 2023-02-17-20-24-15
	.. gh-issue: 101566
	.. nonce: FjgWBt
	.. section: Library

	In zipfile, sync Path with `zipp 3.14
	<https://zipp.readthedocs.io/en/latest/history.html#v3-14-0>`_, including
	fix for extractall on the underlying zipfile after being wrapped in
	``Path``.

	..

	.. date: 2023-02-17-19-00-58
	.. gh-issue: 97930
	.. nonce: C_nQjb
	.. section: Library

	Apply changes from `importlib_resources 5.12
	<https://importlib-resources.readthedocs.io/en/latest/history.html#v5-12-0>`_,
	including fix for ``MultiplexedPath`` to support directories in multiple
	namespaces (python/importlib_resources#265).

	..

	.. date: 2023-02-17-18-44-27
	.. gh-issue: 101997
	.. nonce: A6_blD
	.. section: Library

	Upgrade pip wheel bundled with ensurepip (pip 23.0.1)

	..

	.. date: 2023-02-15-01-54-06
	.. gh-issue: 99108
	.. nonce: rjTSic
	.. section: Library

	The built-in extension modules for :mod:`hashlib` SHA2 algorithms, used when
	OpenSSL does not provide them, now live in a single internal ``_sha2``
	module instead of separate ``_sha256`` and ``_sha512`` modules.

	..

	.. date: 2023-02-14-09-08-48
	.. gh-issue: 101892
	.. nonce: FMos8l
	.. section: Library

	Callable iterators no longer raise :class:`SystemError` when the callable
	object exhausts the iterator but forgets to either return a sentinel value
	or raise :class:`StopIteration`.

	..

	.. date: 2023-02-13-12-55-48
	.. gh-issue: 87634
	.. nonce: q-SBhJ
	.. section: Library

	Remove locking behavior from :func:`functools.cached_property`.

	..

	.. date: 2023-02-11-13-23-29
	.. gh-issue: 97786
	.. nonce: QjvQ1B
	.. section: Library

	Fix potential undefined behaviour in corner cases of floating-point-to-time
	conversions.

	..

	.. date: 2023-02-10-16-02-29
	.. gh-issue: 101517
	.. nonce: r7S2u8
	.. section: Library

	Fixed bug where :mod:`bdb` looks up the source line with :mod:`linecache`
	with a ``lineno=None``, which causes it to fail with an unhandled exception.

	..

	.. date: 2023-02-10-11-59-13
	.. gh-issue: 101773
	.. nonce: J_kI7y
	.. section: Library

	Optimize :class:`fractions.Fraction` for small components. The private
	argument ``_normalize`` of the :class:`fractions.Fraction` constructor has
	been removed.

	..

	.. date: 2023-02-08-18-20-58
	.. gh-issue: 101693
	.. nonce: 4_LPXj
	.. section: Library

	In :meth:`sqlite3.Cursor.execute`, :exc:`DeprecationWarning` is now emitted
	when :ref:`named placeholders <sqlite3-placeholders>` are used together with
	parameters supplied as a :term:`sequence` instead of as a :class:`dict`.
	Starting from Python 3.14, using named placeholders with parameters supplied
	as a sequence will raise a :exc:`~sqlite3.ProgrammingError`. Patch by Erlend
	E. Aasland.

	..

	.. date: 2023-02-07-22-21-46
	.. gh-issue: 101446
	.. nonce: -c0FdK
	.. section: Library

	Change repr of :class:`collections.OrderedDict` to use regular dictionary
	formatting instead of pairs of keys and values.

	..

	.. date: 2023-02-07-22-20-32
	.. gh-issue: 101362
	.. nonce: Jlk6mt
	.. section: Library

	Speed up :class:`pathlib.PurePath` construction by handling arguments more
	uniformly. When a :class:`pathlib.Path` argument is supplied, we use its
	string representation rather than joining its parts with
	:func:`os.path.join`.

	..

	.. date: 2023-02-07-21-16-41
	.. gh-issue: 101362
	.. nonce: KMQllM
	.. section: Library

	Speed up :class:`pathlib.PurePath` construction by calling
	:func:`os.path.join` only when two or more arguments are given.

	..

	.. date: 2023-02-07-20-46-08
	.. gh-issue: 101362
	.. nonce: 2ckZ6R
	.. section: Library

	Speed up :class:`pathlib.Path` construction by running the path flavour
	compatibility check only when pathlib is imported.

	..

	.. date: 2023-02-05-21-40-15
	.. gh-issue: 85984
	.. nonce: Kfzbb2
	.. section: Library

	Refactored the implementation of :func:`pty.fork` to use
	:func:`os.login_tty`.

	A :exc:`DeprecationWarning` is now raised by ``pty.master_open()`` and
	``pty.slave_open()``. They were undocumented and deprecated long long ago in
	the docstring in favor of :func:`pty.openpty`.

	..

	.. date: 2023-02-04-16-35-46
	.. gh-issue: 101561
	.. nonce: Xo6pIZ
	.. section: Library

	Add a new decorator :func:`typing.override`. See :pep:`698` for details.
	Patch by Steven Troxler.

	..

	.. date: 2023-02-01-10-42-16
	.. gh-issue: 63301
	.. nonce: XNxSFh
	.. section: Library

	Set exit code when :mod:`tabnanny` CLI exits on error.

	..

	.. date: 2023-01-27-02-53-50
	.. gh-issue: 101360
	.. nonce: bPB7SL
	.. section: Library

	Fix anchor matching in :meth:`pathlib.PureWindowsPath.match`. Path and
	pattern anchors are now matched with :mod:`fnmatch`, just like other path
	parts. This allows patterns such as ``":/Users/"`` to be matched.

	..

	.. date: 2023-01-25-00-14-52
	.. gh-issue: 101277
	.. nonce: FceHX7
	.. section: Library

	Remove global state from :mod:`itertools` module (:pep:`687`). Patches by
	Erlend E. Aasland.

	..

	.. date: 2023-01-06-21-14-41
	.. gh-issue: 100809
	.. nonce: I697UT
	.. section: Library

	Fix handling of drive-relative paths (like 'C:' and 'C:foo') in
	:meth:`pathlib.Path.absolute`. This method now uses the OS API to retrieve
	the correct current working directory for the drive.

	..

	.. date: 2023-01-02-22-41-44
	.. gh-issue: 99138
	.. nonce: 17hp9U
	.. section: Library

	Apply :pep:`687` to :mod:`zoneinfo`. Patch by Erlend E. Aasland.

	..

	.. date: 2022-10-22-09-26-43
	.. gh-issue: 96764
	.. nonce: Dh9Y5L
	.. section: Library

	:func:`asyncio.wait_for` now uses :func:`asyncio.timeout` as its underlying
	implementation. Patch by Kumar Aditya.

	..

	.. date: 2022-09-05-12-17-34
	.. gh-issue: 88233
	.. nonce: gff9qJ
	.. section: Library

	Correctly preserve "extra" fields in ``zipfile`` regardless of their
	ordering relative to a zip64 "extra."

	..

	.. bpo: 23224
	.. date: 2018-06-20-09-12-21
	.. nonce: zxCQ13
	.. section: Library

	Fix segfaults when creating :class:`lzma.LZMADecompressor` and
	:class:`bz2.BZ2Decompressor` objects without calling ``__init__()``, and fix
	leakage of locks and internal buffers when calling the ``__init__()``
	methods of :class:`lzma.LZMADecompressor`, :class:`lzma.LZMACompressor`,
	:class:`bz2.BZ2Compressor`, and :class:`bz2.BZ2Decompressor` objects
	multiple times.

	..

	.. date: 2023-02-19-10-33-01
	.. gh-issue: 85417
	.. nonce: kYO8u3
	.. section: Documentation

	Update :mod:`cmath` documentation to clarify behaviour on branch cuts.

	..

	.. date: 2023-02-07-21-43-24
	.. gh-issue: 97725
	.. nonce: cuY7Cd
	.. section: Documentation

	Fix :meth:`asyncio.Task.print_stack` description for ``file=None``. Patch by
	Oleg Iarygin.

	..

	.. date: 2023-02-18-10-51-02
	.. gh-issue: 102019
	.. nonce: 0797SJ
	.. section: Tests

	Fix deadlock on shutdown if ``test_current_{exception,frames}`` fails. Patch
	by Jacob Bower.

	..

	.. date: 2023-02-11-22-36-10
	.. gh-issue: 85984
	.. nonce: EVXjT9
	.. section: Tests

	Utilize new "winsize" functions from termios in pty tests.

	..

	.. date: 2023-02-11-20-28-08
	.. gh-issue: 89792
	.. nonce: S-Y5BZ
	.. section: Tests

	``test_tools`` now copies up to 10x less source data to a temporary
	directory during the ``freeze`` test by ignoring git metadata and other
	artifacts. It also limits its python build parallelism based on
	os.cpu_count instead of hard coding it as 8 cores.

	..

	.. date: 2023-01-12-00-49-16
	.. gh-issue: 99942
	.. nonce: DUR8b4
	.. section: Build

	On Android, in a static build, python-config in embed mode no longer
	incorrectly reports a library to link to.

	..

	.. date: 2022-12-20-01-06-17
	.. gh-issue: 99942
	.. nonce: lbmzYj
	.. section: Build

	On Android, python.pc now correctly reports the library to link to, the same
	as python-config.sh.

	..

	.. date: 2022-12-18-08-33-28
	.. gh-issue: 100221
	.. nonce: K94Ct3
	.. section: Build

	Fix creating install directories in ``make sharedinstall`` if they exist
	outside ``DESTDIR`` already.

	..

	.. date: 2022-09-14-10-38-15
	.. gh-issue: 96821
	.. nonce: Zk2a9c
	.. section: Build

	Explicitly mark C extension modules that need defined signed integer
	overflow, and add a configure option :option:`--with-strict-overflow`. Patch
	by Matthias Görgens and Shantanu Jain.

	..

	.. date: 2023-03-01-01-36-39
	.. gh-issue: 102344
	.. nonce: Dgfux4
	.. section: Windows

	Implement ``winreg.QueryValue`` using ``QueryValueEx`` and
	``winreg.SetValue`` using ``SetValueEx``. Patch by Max Bachmann.

	..

	.. date: 2023-02-15-11-08-10
	.. gh-issue: 101881
	.. nonce: fScr3m
	.. section: Windows

	Handle read and write operations on non-blocking pipes properly on Windows.

	..

	.. date: 2023-02-13-18-05-49
	.. gh-issue: 101881
	.. nonce: _TnHzN
	.. section: Windows

	Add support for the os.get_blocking() and os.set_blocking() functions on
	Windows.

	..

	.. date: 2023-02-13-16-32-50
	.. gh-issue: 101849
	.. nonce: 7lm_53
	.. section: Windows

	Ensures installer will correctly upgrade existing ``py.exe`` launcher
	installs.

	..

	.. date: 2023-02-10-14-26-05
	.. gh-issue: 101763
	.. nonce: RPaj7r
	.. section: Windows

	Updates copy of libffi bundled with Windows installs to 3.4.4.

	..

	.. date: 2023-02-09-22-09-27
	.. gh-issue: 101759
	.. nonce: zFlqSH
	.. section: Windows

	Update Windows installer to SQLite 3.40.1.

	..

	.. date: 2023-02-07-18-22-54
	.. gh-issue: 101614
	.. nonce: NjVP0n
	.. section: Windows

	Correctly handle extensions built against debug binaries that reference
	``python3_d.dll``.

	..

	.. date: 2023-01-25-11-33-54
	.. gh-issue: 101196
	.. nonce: wAX_2g
	.. section: Windows

	The functions ``os.path.isdir``, ``os.path.isfile``, ``os.path.islink`` and
	``os.path.exists`` are now 13% to 28% faster on Windows, by making fewer
	Win32 API calls.

	..

	.. date: 2023-02-09-22-07-17
	.. gh-issue: 101759
	.. nonce: B0JP2H
	.. section: macOS

	Update macOS installer to SQLite 3.40.1.

	..

	.. date: 2023-02-14-15-53-01
	.. gh-issue: 101907
	.. nonce: HgF1N2
	.. section: C API

	Removes use of non-standard C++ extension in public header files.

	..

	.. date: 2023-02-09-10-38-20
	.. gh-issue: 99293
	.. nonce: mFqfpp
	.. section: C API

	Document that the Py_TPFLAGS_VALID_VERSION_TAG is an internal feature,
	should not be used, and will be removed.

	..

	.. date: 2023-02-06-16-14-30
	.. gh-issue: 101578
	.. nonce: PW5fA9
	.. section: C API

	Add :c:func:`PyErr_GetRaisedException` and
	:c:func:`PyErr_SetRaisedException` for saving and restoring the current
	exception. These functions return and accept a single exception object,
	rather than the triple arguments of the now-deprecated :c:func:`PyErr_Fetch`
	and :c:func:`PyErr_Restore`. This is less error prone and a bit more
	efficient.

	Add :c:func:`PyException_GetArgs` and :c:func:`PyException_SetArgs` as
	convenience functions for retrieving and modifying the
	:attr:`~BaseException.args` passed to the exception's constructor.

	..

	.. date: 2022-04-21-17-25-22
	.. gh-issue: 91744
	.. nonce: FgvaMi
	.. section: C API

	Introduced the Unstable C API tier, marking APi that is allowed to change
	in minor releases without a deprecation period. See :pep:`689` for details.