.. bpo: 46347
.. date: 2022-01-11-13-57-00
.. nonce: Gd8M-S
.. release date: 2022-01-13
.. section: Core and Builtins

Fix memory leak in PyEval_EvalCodeEx.

..

.. bpo: 46289
.. date: 2022-01-07-23-32-03
.. nonce: NnjpVc
.. section: Core and Builtins

ASDL declaration of ``FormattedValue`` has changed to reflect ``conversion``
field is not optional.

..

.. bpo: 46237
.. date: 2022-01-07-19-33-05
.. nonce: 9A6Hpq
.. section: Core and Builtins

Fix the line number of tokenizer errors inside f-strings. Patch by Pablo
Galindo.

..

.. bpo: 46006
.. date: 2022-01-05-17-13-47
.. nonce: hdH5Vn
.. section: Core and Builtins

Fix a regression when a type method like ``__init__()`` is modified in a
subinterpreter. Fix a regression in ``_PyUnicode_EqualToASCIIId()`` and type
``update_slot()``. Revert the change which made the Unicode dictionary of
interned strings compatible with subinterpreters: the internal interned
dictionary is shared again by all interpreters. Patch by Victor Stinner.

..

.. bpo: 46085
.. date: 2021-12-30-00-23-41
.. nonce: bDuJqu
.. section: Core and Builtins

Fix iterator cache mechanism of :class:`OrderedDict`.

..

.. bpo: 46110
.. date: 2021-12-18-02-37-07
.. nonce: B6hAfu
.. section: Core and Builtins

Add a maximum recursion check to the PEG parser to avoid stack overflow.
Patch by Pablo Galindo

..

.. bpo: 46054
.. date: 2021-12-12-05-30-21
.. nonce: 2P-foG
.. section: Core and Builtins

Fix parser error when parsing non-utf8 characters in source files. Patch by
Pablo Galindo.

..

.. bpo: 46042
.. date: 2021-12-11-17-40-34
.. nonce: aqYxku
.. section: Core and Builtins

Improve the location of the caret in :exc:`SyntaxError` exceptions emitted
by the symbol table. Patch by Pablo Galindo.

..

.. bpo: 46025
.. date: 2021-12-09-11-41-35
.. nonce: pkEvW9
.. section: Core and Builtins

Fix a crash in the :mod:`atexit` module involving functions that unregister
themselves before raising exceptions. Patch by Pablo Galindo.

..

.. bpo: 46009
.. date: 2021-12-08-11-06-53
.. nonce: cL8pH0
.. section: Core and Builtins

Restore behavior from 3.9 and earlier when sending non-None to newly started
generator. In 3.9 this did not affect the state of the generator. In 3.10.0
and 3.10.1 ``gen_func().send(0)`` is equivalent to
``gen_func().throw(TypeError(...)`` which exhausts the generator. In 3.10.2
onward, the behavior has been reverted to that of 3.9.

..

.. bpo: 46000
.. date: 2021-12-07-11-42-44
.. nonce: v_ru3k
.. section: Core and Builtins

Improve compatibility of the :mod:`curses` module with NetBSD curses.

..

.. bpo: 46004
.. date: 2021-12-07-11-24-24
.. nonce: TTEU1p
.. section: Core and Builtins

Fix the :exc:`SyntaxError` location for errors involving for loops with
invalid targets. Patch by Pablo Galindo

..

.. bpo: 42918
.. date: 2021-12-06-15-32-12
.. nonce: Czpgtg
.. section: Core and Builtins

Fix bug where the built-in :func:`compile` function did not always raise a
:exc:`SyntaxError` when passed multiple statements in 'single' mode. Patch
by Weipeng Hong.

..

.. bpo: 40479
.. date: 2022-01-07-15-20-19
.. nonce: EKfr3F
.. section: Library

Fix :mod:`hashlib` *usedforsecurity* option to work correctly with OpenSSL
3.0.0 in FIPS mode.

..

.. bpo: 46070
.. date: 2022-01-07-13-51-22
.. nonce: -axLUW
.. section: Library

Fix possible segfault when importing the :mod:`asyncio` module from
different sub-interpreters in parallel. Patch by Erlend E. Aasland.

..

.. bpo: 46278
.. date: 2022-01-06-13-38-00
.. nonce: wILA80
.. section: Library

Reflect ``context`` argument in ``AbstractEventLoop.call_*()`` methods. Loop
implementations already support it.

..

.. bpo: 46239
.. date: 2022-01-03-12-59-20
.. nonce: ySVSEy
.. section: Library

Improve error message when importing :mod:`asyncio.windows_events` on
non-Windows.

..

.. bpo: 20369
.. date: 2021-12-17-12-06-40
.. nonce: zzLuBz
.. section: Library

:func:`concurrent.futures.wait` no longer blocks forever when given
duplicate Futures. Patch by Kumar Aditya.

..

.. bpo: 46105
.. date: 2021-12-16-14-30-36
.. nonce: pprB1K
.. section: Library

Honor spec when generating requirement specs with urls and extras
(importlib_metadata 4.8.3).

..

.. bpo: 26952
.. date: 2021-12-14-13-18-45
.. nonce: hjhISq
.. section: Library

:mod:`argparse` raises :exc:`ValueError` with clear message when trying to
render usage for an empty mutually-exclusive group. Previously it raised a
cryptic :exc:`IndexError`.

..

.. bpo: 27718
.. date: 2021-12-11-22-51-30
.. nonce: MgQiGl
.. section: Library

Fix help for the :mod:`signal` module. Some functions (e.g. ``signal()`` and
``getsignal()``) were omitted.

..

.. bpo: 46032
.. date: 2021-12-11-15-45-07
.. nonce: HmciLT
.. section: Library

The ``registry()`` method of :func:`functools.singledispatch` functions
checks now the first argument or the first parameter annotation and raises a
TypeError if it is not supported. Previously unsupported "types" were
ignored (e.g. ``typing.List[int]``) or caused an error at calling time (e.g.
``list[int]``).

..

.. bpo: 46018
.. date: 2021-12-09-00-44-42
.. nonce: hkTI7v
.. section: Library

Ensure that :func:`math.expm1` does not raise on underflow.

..

.. bpo: 45755
.. date: 2021-12-07-21-55-22
.. nonce: bRqKGa
.. section: Library

:mod:`typing` generic aliases now reveal the class attributes of the
original generic class when passed to ``dir()``. This was the behavior up to
Python 3.6, but was changed in 3.7-3.9.

..

.. bpo: 13236
.. date: 2021-11-30-13-52-02
.. nonce: FmJIkO
.. section: Library

:class:`unittest.TextTestResult` and :class:`unittest.TextTestRunner` flush
now the output stream more often.

..

.. bpo: 42378
.. date: 2021-07-25-08-17-55
.. nonce: WIhUZK
.. section: Library

Fixes the issue with log file being overwritten when
:class:`logging.FileHandler` is used in :mod:`atexit` with *filemode* set to
``'w'``. Note this will cause the message in *atexit* not being logged if
the log stream is already closed due to shutdown of logging.

..

.. bpo: 46120
.. date: 2021-12-21-12-45-57
.. nonce: PE0DmJ
.. section: Documentation

State that ``|`` is preferred for readability over ``Union`` in the
:mod:`typing` docs.

..

.. bpo: 46040
.. date: 2021-12-11-20-03-09
.. nonce: qrsG0C
.. section: Documentation

Fix removal Python version for ``@asyncio.coroutine``, the correct value is
3.11.

..

.. bpo: 19737
.. date: 2021-11-28-22-43-21
.. nonce: cOOubB
.. section: Documentation

Update the documentation for the :func:`globals` function.

..

.. bpo: 45840
.. date: 2021-11-19-02-02-32
.. nonce: A51B2S
.. section: Documentation

Improve cross-references in the documentation for the data model.

..

.. bpo: 46205
.. date: 2022-01-07-14-06-12
.. nonce: dnc2OC
.. section: Tests

Fix hang in runtest_mp due to race condition

..

.. bpo: 46263
.. date: 2022-01-06-15-45-34
.. nonce: bJXek6
.. section: Tests

Fix test_capi on FreeBSD 14-dev: instruct jemalloc to not fill freed memory
with junk byte.

..

.. bpo: 46150
.. date: 2021-12-23-13-42-15
.. nonce: RhtADs
.. section: Tests

Now ``fakename`` in ``test_pathlib.PosixPathTest.test_expanduser`` is
checked to be non-existent.

..

.. bpo: 46129
.. date: 2021-12-19-12-20-57
.. nonce: I3MunH
.. section: Tests

Rewrite ``asyncio.locks`` tests with
:class:`unittest.IsolatedAsyncioTestCase` usage.

..

.. bpo: 46114
.. date: 2021-12-17-14-46-19
.. nonce: 9iyZ_9
.. section: Tests

Fix test case for OpenSSL 3.0.1 version. OpenSSL 3.0 uses ``0xMNN00PP0L``.

..

.. bpo: 46263
.. date: 2022-01-05-02-58-10
.. nonce: xiv8NU
.. section: Build

``configure`` no longer sets ``MULTIARCH`` on FreeBSD platforms.

..

.. bpo: 46106
.. date: 2021-12-20-07-10-41
.. nonce: 5qcv3L
.. section: Build

Updated OpenSSL to 1.1.1m in Windows builds, macOS installer builds, and CI.
Patch by Kumar Aditya.

..

.. bpo: 40477
.. date: 2022-01-02-21-56-53
.. nonce: W3nnM6
.. section: macOS

The Python Launcher app for macOS now properly launches scripts and, if
necessary, the Terminal app when running on recent macOS releases.

..

.. bpo: 46236
.. date: 2022-01-05-10-16-16
.. nonce: pcmVQw
.. section: C API

Fix a bug in :c:func:`PyFunction_GetAnnotations` that caused it to return a
``tuple`` instead of a ``dict``.