.. date: 2023-12-03-19-34-51
.. gh-issue: 112625
.. nonce: QWTlwS
.. release date: 2023-12-04
.. section: Core and Builtins

Fixes a bug where a bytearray object could be cleared while iterating over
an argument in the ``bytearray.join()`` method that could result in reading
memory after it was freed.

..

.. date: 2023-11-25-22-58-49
.. gh-issue: 112388
.. nonce: MU3cIM
.. section: Core and Builtins

Fix an error that was causing the parser to try to overwrite tokenizer
errors. Patch by pablo Galindo

..

.. date: 2023-11-25-22-39-44
.. gh-issue: 112387
.. nonce: AbBq5W
.. section: Core and Builtins

Fix error positions for decoded strings with backwards tokenize errors.
Patch by Pablo Galindo

..

.. date: 2023-11-19-15-57-23
.. gh-issue: 112266
.. nonce: BSJMbR
.. section: Core and Builtins

Change docstrings of :attr:`~object.__dict__` and
:attr:`~object.__weakref__`.

..

.. date: 2023-10-31-14-25-21
.. gh-issue: 109181
.. nonce: 11h6Mc
.. section: Core and Builtins

Speed up :obj:`Traceback` object creation by lazily compute the line number.
Patch by Pablo Galindo

..

.. date: 2023-10-27-19-38-33
.. gh-issue: 102388
.. nonce: vd5YUZ
.. section: Core and Builtins

Fix a bug where ``iso2022_jp_3`` and ``iso2022_jp_2004`` codecs read out of
bounds

..

.. date: 2023-10-27-12-17-49
.. gh-issue: 111366
.. nonce: _TSknV
.. section: Core and Builtins

Fix an issue in the :mod:`codeop` that was causing :exc:`SyntaxError`
exceptions raised in the presence of invalid syntax to not contain precise
error messages. Patch by Pablo Galindo

..

.. date: 2023-10-27-11-51-40
.. gh-issue: 111380
.. nonce: vgSbir
.. section: Core and Builtins

Fix a bug that was causing :exc:`SyntaxWarning` to appear twice when parsing
if invalid syntax is encountered later. Patch by Pablo galindo

..

.. date: 2023-10-26-15-34-11
.. gh-issue: 88116
.. nonce: W9-vaQ
.. section: Core and Builtins

Traceback location ranges involving wide unicode characters (like emoji and
asian characters) now are properly highlighted. Patch by Batuhan Taskaya and
Pablo Galindo.

..

.. date: 2023-10-23-22-11-09
.. gh-issue: 94438
.. nonce: y2pITu
.. section: Core and Builtins

Fix a regression that prevented jumping across ``is None`` and ``is not
None`` when debugging. Patch by Savannah Ostrowski.

..

.. date: 2023-10-11-13-46-14
.. gh-issue: 110696
.. nonce: J9kSzr
.. section: Core and Builtins

Fix incorrect error message for invalid argument unpacking. Patch by Pablo
Galindo

..

.. date: 2023-10-02-23-17-08
.. gh-issue: 110237
.. nonce: _Xub0z
.. section: Core and Builtins

Fix missing error checks for calls to ``PyList_Append`` in
``_PyEval_MatchClass``.

..

.. date: 2023-09-11-12-41-42
.. gh-issue: 109216
.. nonce: 60QOSb
.. section: Core and Builtins

Fix possible memory leak in :opcode:`BUILD_MAP`.

..

.. date: 2023-12-02-12-55-17
.. gh-issue: 112618
.. nonce: 7_FT8-
.. section: Library

Fix a caching bug relating to :data:`typing.Annotated`. ``Annotated[str,
True]`` is no longer identical to ``Annotated[str, 1]``.

..

.. date: 2023-11-28-20-01-33
.. gh-issue: 112509
.. nonce: QtoKed
.. section: Library

Fix edge cases that could cause a key to be present in both the
``__required_keys__`` and ``__optional_keys__`` attributes of a
:class:`typing.TypedDict`. Patch by Jelle Zijlstra.

..

.. date: 2023-11-24-21-00-24
.. gh-issue: 94722
.. nonce: GMIQIn
.. section: Library

Fix bug where comparison between instances of :class:`~doctest.DocTest`
fails if one of them has ``None`` as its lineno.

..

.. date: 2023-11-15-04-53-37
.. gh-issue: 112105
.. nonce: I3RcVN
.. section: Library

Make :func:`readline.set_completer_delims` work with libedit

..

.. date: 2023-11-14-18-43-55
.. gh-issue: 111942
.. nonce: x1pnrj
.. section: Library

Fix SystemError in the TextIOWrapper constructor with non-encodable "errors"
argument in non-debug mode.

..

.. date: 2023-11-11-16-42-48
.. gh-issue: 109538
.. nonce: cMG5ux
.. section: Library

Issue warning message instead of having :class:`RuntimeError` be displayed
when event loop has already been closed at :meth:`StreamWriter.__del__`.

..

.. date: 2023-11-10-22-08-28
.. gh-issue: 111942
.. nonce: MDFm6v
.. section: Library

Fix crashes in :meth:`io.TextIOWrapper.reconfigure` when pass invalid
arguments, e.g. non-string encoding.

..

.. date: 2023-11-08-15-58-57
.. gh-issue: 111804
.. nonce: uAXTOL
.. section: Library

Remove posix.fallocate() under WASI as the underlying posix_fallocate() is
not available in WASI preview2.

..

.. date: 2023-11-08-11-50-49
.. gh-issue: 111841
.. nonce: iSqdQf
.. section: Library

Fix truncating arguments on an embedded null character in :meth:`os.putenv`
and :meth:`os.unsetenv` on Windows.

..

.. date: 2023-11-04-10-24-25
.. gh-issue: 111541
.. nonce: x0RBI1
.. section: Library

Fix :mod:`doctest` for :exc:`SyntaxError` not-builtin subclasses.

..

.. date: 2023-11-01-14-03-24
.. gh-issue: 110894
.. nonce: 7-wZxC
.. section: Library

Call loop exception handler for exceptions in ``client_connected_cb`` of
:func:`asyncio.start_server` so that applications can handle it. Patch by
Kumar Aditya.

..

.. date: 2023-10-31-07-46-56
.. gh-issue: 111531
.. nonce: 6zUV_G
.. section: Library

Fix reference leaks in ``bind_class()`` and ``bind_all()`` methods of
:mod:`tkinter` widgets.

..

.. date: 2023-10-30-08-50-46
.. gh-issue: 111356
.. nonce: Bc8LvA
.. section: Library

Added :func:`io.text_encoding()`, :data:`io.DEFAULT_BUFFER_SIZE`, and
:class:`io.IncrementalNewlineDecoder` to ``io.__all__``.

..

.. date: 2023-10-27-12-46-56
.. gh-issue: 68166
.. nonce: 0EbWW4
.. section: Library

Remove mention of not supported "vsapi" element type in
:meth:`tkinter.ttk.Style.element_create`. Add tests for ``element_create()``
and other ``ttk.Style`` methods. Add examples for ``element_create()`` in
the documentation.

..

.. date: 2023-10-24-12-09-46
.. gh-issue: 111251
.. nonce: urFYtn
.. section: Library

Fix :mod:`_blake2` not checking for errors when initializing.

..

.. date: 2023-10-23-13-53-58
.. gh-issue: 111174
.. nonce: Oohmzd
.. section: Library

Fix crash in :meth:`io.BytesIO.getbuffer` called repeatedly for empty
BytesIO.

..

.. date: 2023-10-22-21-28-05
.. gh-issue: 111187
.. nonce: _W11Ab
.. section: Library

Postpone removal version for locale.getdefaultlocale() to Python 3.15.

..

.. date: 2023-10-21-13-57-06
.. gh-issue: 111159
.. nonce: GoHp7s
.. section: Library

Fix :mod:`doctest` output comparison for exceptions with notes.

..

.. date: 2023-10-20-15-29-10
.. gh-issue: 110910
.. nonce: u2oPwX
.. section: Library

Fix invalid state handling in :class:`asyncio.TaskGroup` and
:class:`asyncio.Timeout`. They now raise proper RuntimeError if they are
improperly used and are left in consistent state after this.

..

.. date: 2023-10-19-22-46-34
.. gh-issue: 111092
.. nonce: hgut12
.. section: Library

Make turtledemo run without default root enabled.

..

.. date: 2023-10-10-10-46-55
.. gh-issue: 110590
.. nonce: fatz-h
.. section: Library

Fix a bug in :meth:`!_sre.compile` where :exc:`TypeError` would be
overwritten by :exc:`OverflowError` when the *code* argument was a list of
non-ints.

..

.. date: 2023-10-09-19-09-32
.. gh-issue: 65052
.. nonce: C2mRlo
.. section: Library

Prevent :mod:`pdb` from crashing when trying to display undisplayable
objects

..

.. date: 2023-10-08-18-15-02
.. gh-issue: 110519
.. nonce: RDGe8-
.. section: Library

Deprecation warning about non-integer number in :mod:`gettext` now alwais
refers to the line in the user code where gettext function or method is
used. Previously it could refer to a line in ``gettext`` code.

..

.. date: 2023-10-07-13-50-12
.. gh-issue: 110378
.. nonce: Y4L8fl
.. section: Library

:func:`~contextlib.contextmanager` and
:func:`~contextlib.asynccontextmanager` context managers now close an
invalid underlying generator object that yields more then one value.

..

.. date: 2023-10-04-18-56-29
.. gh-issue: 110365
.. nonce: LCxiau
.. section: Library

Fix :func:`termios.tcsetattr` bug that was overwritting existing errors
during parsing integers from ``term`` list.

..

.. date: 2023-10-02-05-23-27
.. gh-issue: 110196
.. nonce: djwt0z
.. section: Library

Add ``__reduce__`` method to :class:`IPv6Address` in order to keep
``scope_id``

..

.. date: 2023-09-25-20-05-41
.. gh-issue: 109747
.. nonce: _cRJH8
.. section: Library

Improve errors for unsupported look-behind patterns. Now re.error is raised
instead of OverflowError or RuntimeError for too large width of look-behind
pattern.

..

.. date: 2023-09-23-14-40-51
.. gh-issue: 109786
.. nonce: UX3pKv
.. section: Library

Fix possible reference leaks and crash when re-enter the ``__next__()``
method of :class:`itertools.pairwise`.

..

.. date: 2023-09-02-16-07-23
.. gh-issue: 108791
.. nonce: fBcAqh
.. section: Library

Improved error handling in :mod:`pdb` command line interface, making it
produce more concise error messages.

..

.. date: 2022-05-28-20-55-07
.. gh-issue: 73561
.. nonce: YRmAvy
.. section: Library

Omit the interface scope from an IPv6 address when used as Host header by
:mod:`http.client`.

..

.. date: 2022-05-06-15-49-57
.. gh-issue: 86826
.. nonce: rf006W
.. section: Library

:mod:`zipinfo` now supports the full range of values in the TZ string
determined by RFC 8536 and detects all invalid formats. Both Python and C
implementations now raise exceptions of the same type on invalid data.

..

.. bpo: 41422
.. date: 2020-07-28-20-48-05
.. nonce: iMwnMu
.. section: Library

Fixed memory leaks of :class:`pickle.Pickler` and :class:`pickle.Unpickler`
involving cyclic references via the internal memo mapping.

..

.. bpo: 40262
.. date: 2020-05-21-23-32-46
.. nonce: z4fQv1
.. section: Library

The :meth:`ssl.SSLSocket.recv_into` method no longer requires the *buffer*
argument to implement ``__len__`` and supports buffers with arbitrary item
size.

..

.. bpo: 35191
.. date: 2018-11-08-18-44-04
.. nonce: s29bWu
.. section: Library

Fix unexpected integer truncation in :meth:`socket.setblocking` which caused
it to interpret multiples of ``2**32`` as ``False``.

..

.. date: 2023-09-03-13-43-49
.. gh-issue: 108826
.. nonce: KG7abS
.. section: Documentation

:mod:`dis` module command-line interface is now mentioned in documentation.

..

.. date: 2023-10-31-22-09-25
.. gh-issue: 110367
.. nonce: UhQi44
.. section: Tests

Make regrtest ``--verbose3`` option compatible with ``--huntrleaks -jN``
options. The ``./python -m test -j1 -R 3:3 --verbose3`` command now works as
expected. Patch by Victor Stinner.

..

.. date: 2023-10-25-13-13-30
.. gh-issue: 111309
.. nonce: Re7orL
.. section: Tests

:mod:`distutils` tests can now be run via :mod:`unittest`.

..

.. date: 2023-10-21-19-27-36
.. gh-issue: 111165
.. nonce: FU6mUk
.. section: Tests

Remove no longer used functions ``run_unittest()`` and ``run_doctest()`` and
class ``BasicTestRunner`` from the :mod:`test.support` module.

..

.. date: 2023-10-21-00-10-36
.. gh-issue: 110932
.. nonce: jktjJU
.. section: Tests

Fix regrtest if the ``SOURCE_DATE_EPOCH`` environment variable is defined:
use the variable value as the random seed. Patch by Victor Stinner.

..

.. date: 2023-10-17-17-54-36
.. gh-issue: 110995
.. nonce: Fx8KRD
.. section: Tests

test_gdb: Fix detection of gdb built without Python scripting support. Patch
by Victor Stinner.

..

.. date: 2023-10-16-13-47-24
.. gh-issue: 110918
.. nonce: aFgZK3
.. section: Tests

Test case matching patterns specified by options ``--match``, ``--ignore``,
``--matchfile`` and ``--ignorefile`` are now tested in the order of
specification, and the last match determines whether the test case be run or
ignored.

..

.. date: 2023-10-10-23-20-13
.. gh-issue: 110647
.. nonce: jKG3sY
.. section: Tests

Fix test_stress_modifying_handlers() of test_signal. Patch by Victor
Stinner.

..

.. date: 2023-10-06-02-32-18
.. gh-issue: 103053
.. nonce: VfxBLI
.. section: Tests

Fix test_tools.test_freeze on FreeBSD: run "make distclean" instead of "make
clean" in the copied source directory to remove also the "python" program.
Patch by Victor Stinner.

..

.. date: 2023-10-05-19-33-49
.. gh-issue: 110167
.. nonce: mIdj3v
.. section: Tests

Fix a deadlock in test_socket when server fails with a timeout but the
client is still running in its thread. Don't hold a lock to call cleanup
functions in doCleanups(). One of the cleanup function waits until the
client completes, whereas the client could deadlock if it called
addCleanup() in such situation. Patch by Victor Stinner.

..

.. date: 2023-10-05-14-22-48
.. gh-issue: 110388
.. nonce: 1-HQJO
.. section: Tests

Add tests for :mod:`tty`.

..

.. date: 2023-10-05-13-46-50
.. gh-issue: 81002
.. nonce: bOcuV6
.. section: Tests

Add tests for :mod:`termios`.

..

.. date: 2023-10-03-10-54-09
.. gh-issue: 110267
.. nonce: O-c47G
.. section: Tests

Add tests for pickling and copying PyStructSequence objects. Patched by
Xuehai Pan.

..

.. date: 2023-09-29-00-19-21
.. gh-issue: 109974
.. nonce: Sh_g-r
.. section: Tests

Fix race conditions in test_threading lock tests. Wait until a condition is
met rather than using :func:`time.sleep` with a hardcoded number of seconds.
Patch by Victor Stinner.

..

.. date: 2023-09-28-12-25-19
.. gh-issue: 109972
.. nonce: GYnwIP
.. section: Tests

Split test_gdb.py file into a test_gdb package made of multiple tests, so
tests can now be run in parallel. Patch by Victor Stinner.

..

.. date: 2023-09-13-05-58-09
.. gh-issue: 104736
.. nonce: lA25Fu
.. section: Tests

Fix test_gdb on Python built with LLVM clang 16 on Linux ppc64le (ex: Fedora
38). Search patterns in gdb "bt" command output to detect when gdb fails to
retrieve the traceback. For example, skip a test if ``Backtrace stopped:
frame did not save the PC`` is found. Patch by Victor Stinner.

..

.. date: 2023-09-05-20-46-35
.. gh-issue: 108927
.. nonce: TpwWav
.. section: Tests

Fixed order dependence in running tests in the same process when a test that
has submodules (e.g. test_importlib) follows a test that imports its
submodule (e.g. test_importlib.util) and precedes a test (e.g. test_unittest
or test_compileall) that uses that submodule.

..

.. date: 2023-10-06-02-15-23
.. gh-issue: 103053
.. nonce: --7JUF
.. section: Build

"make check-clean-src" now also checks if the "python" program is found in
the source directory: fail with an error if it does exist. Patch by Victor
Stinner.

..

.. date: 2023-10-05-11-46-20
.. gh-issue: 109191
.. nonce: imUkVN
.. section: Build

Fix compile error when building with recent versions of libedit.

..

.. date: 2023-10-19-21-46-18
.. gh-issue: 110913
.. nonce: CWlPfg
.. section: Windows

WindowsConsoleIO now correctly chunks large buffers without splitting up
UTF-8 sequences.

..

.. date: 2023-10-06-14-20-14
.. gh-issue: 110437
.. nonce: xpYy9q
.. section: Windows

Allows overriding the source of VC redistributables so that releases can be
guaranteed to never downgrade between updates.

..

.. date: 2023-10-05-15-23-23
.. gh-issue: 109286
.. nonce: N8OzMg
.. section: Windows

Update Windows installer to use SQLite 3.43.1.

..

.. date: 2023-10-18-17-26-36
.. gh-issue: 110950
.. nonce: sonoma
.. section: macOS

Update macOS installer to include an upstream Tcl/Tk fix for the ``Secure
coding is not enabled for restorable state!`` warning encountered in Tkinter
on macOS 14 Sonoma.

..

.. date: 2023-10-18-01-40-36
.. gh-issue: 111015
.. nonce: NaLI2L
.. section: macOS

Ensure that IDLE.app and Python Launcher.app are installed with appropriate
permissions on macOS builds.

..

.. date: 2023-10-04-23-38-24
.. gh-issue: 109286
.. nonce: 1ZLMaq
.. section: macOS

Update macOS installer to use SQLite 3.43.1.

..

.. date: 2023-09-02-08-49-57
.. gh-issue: 71383
.. nonce: Ttkchg
.. section: macOS

Update macOS installer to include an upstream Tcl/Tk fix for the
``ttk::ThemeChanged`` error encountered in Tkinter.

..

.. date: 2023-08-30-16-33-57
.. gh-issue: 92603
.. nonce: ATkKVO
.. section: macOS

Update macOS installer to include a fix accepted by upstream Tcl/Tk for a
crash encountered after the first :meth:`tkinter.Tk` instance is destroyed.

..

.. date: 2023-05-21-23-54-52
.. gh-issue: 99834
.. nonce: 6ANPts
.. section: macOS

Update macOS installer to Tcl/Tk 8.6.13.

..

.. bpo: 35668
.. date: 2019-01-07-06-18-25
.. nonce: JimxP5
.. section: IDLE

Add docstrings to the IDLE debugger module. Fix two bugs: initialize
Idb.botframe (should be in Bdb); in Idb.in_rpc_code, check whether
prev_frame is None before trying to use it. Greatly expand test_debugger.

..

.. date: 2023-11-27-09-44-16
.. gh-issue: 112438
.. nonce: GdNZiI
.. section: C API

Fix support of format units "es", "et", "es#", and "et#" in nested tuples in
:c:func:`PyArg_ParseTuple`-like functions.

..

.. date: 2023-09-17-21-47-31
.. gh-issue: 109521
.. nonce: JDF6i9
.. section: C API

:c:func:`PyImport_GetImporter` now sets RuntimeError if it fails to get
:data:`sys.path_hooks` or :data:`sys.path_importer_cache` or they are not
list and dict correspondingly. Previously it could return NULL without
setting error in obscure cases, crash or raise SystemError if these
attributes have wrong type.