.. date: 2023-09-12-16-00-42
.. gh-issue: 109351
.. nonce: kznGeR
.. release date: 2023-10-02
.. section: Core and Builtins

Fix crash when compiling an invalid AST involving a named (walrus)
expression.

..

.. date: 2023-09-10-18-53-55
.. gh-issue: 109207
.. nonce: Fei8bY
.. section: Core and Builtins

Fix a SystemError in ``__repr__`` of symtable entry object.

..

.. date: 2023-09-09-21-17-18
.. gh-issue: 109179
.. nonce: ZR8qs2
.. section: Core and Builtins

Fix bug where the C traceback display drops notes from :exc:`SyntaxError`.

..

.. date: 2023-09-07-16-05-36
.. gh-issue: 88943
.. nonce: rH_X3W
.. section: Core and Builtins

Improve syntax error for non-ASCII character that follows a numerical
literal. It now points on the invalid non-ASCII character, not on the valid
numerical literal.

..

.. date: 2023-09-05-20-52-17
.. gh-issue: 108959
.. nonce: 6z45Sy
.. section: Core and Builtins

Fix caret placement for error locations for subscript and binary operations
that involve non-semantic parentheses and spaces. Patch by Pablo Galindo

..

.. date: 2023-08-30-15-41-47
.. gh-issue: 108520
.. nonce: u0ZGP_
.. section: Core and Builtins

Fix :meth:`multiprocessing.synchronize.SemLock.__setstate__` to properly
initialize :attr:`multiprocessing.synchronize.SemLock._is_fork_ctx`. This
fixes a regression when passing a SemLock accross nested processes.

Rename :attr:`multiprocessing.synchronize.SemLock.is_fork_ctx` to
:attr:`multiprocessing.synchronize.SemLock._is_fork_ctx` to avoid exposing
it as public API.

..

.. date: 2023-09-28-18-53-11
.. gh-issue: 110036
.. nonce: fECxTj
.. section: Library

On Windows, multiprocessing ``Popen.terminate()`` now catchs
:exc:`PermissionError` and get the process exit code. If the process is
still running, raise again the :exc:`PermissionError`. Otherwise, the
process terminated as expected: store its exit code. Patch by Victor
Stinner.

..

.. date: 2023-09-28-18-50-33
.. gh-issue: 110038
.. nonce: nx_gCu
.. section: Library

Fixed an issue that caused :meth:`KqueueSelector.select` to not return all
the ready events in some cases when a file descriptor is registered for both
read and write.

..

.. date: 2023-09-25-23-00-37
.. gh-issue: 109631
.. nonce: eWSqpO
.. section: Library

:mod:`re` functions such as :func:`re.findall`, :func:`re.split`,
:func:`re.search` and :func:`re.sub` which perform short repeated matches
can now be interrupted by user.

..

.. date: 2023-09-22-20-16-44
.. gh-issue: 109593
.. nonce: LboaNM
.. section: Library

Avoid deadlocking on a reentrant call to the multiprocessing resource
tracker. Such a reentrant call, though unlikely, can happen if a GC pass
invokes the finalizer for a multiprocessing object such as SemLock.

..

.. date: 2023-09-20-17-45-46
.. gh-issue: 109613
.. nonce: P13ogN
.. section: Library

Fix :func:`os.stat` and :meth:`os.DirEntry.stat`: check for exceptions.
Previously, on Python built in debug mode, these functions could trigger a
fatal Python error (and abort the process) when a function succeeded with an
exception set. Patch by Victor Stinner.

..

.. date: 2023-09-13-17-22-44
.. gh-issue: 109375
.. nonce: ijJHZ9
.. section: Library

The :mod:`pdb` ``alias`` command now prevents registering aliases without
arguments.

..

.. date: 2023-09-11-00-32-18
.. gh-issue: 107219
.. nonce: 3zqyFT
.. section: Library

Fix a race condition in ``concurrent.futures``. When a process in the
process pool was terminated abruptly (while the future was running or
pending), close the connection write end. If the call queue is blocked on
sending bytes to a worker process, closing the connection write end
interrupts the send, so the queue can be closed. Patch by Victor Stinner.

..

.. date: 2023-09-09-15-08-37
.. gh-issue: 50644
.. nonce: JUAZOh
.. section: Library

Attempts to pickle or create a shallow or deep copy of :mod:`codecs` streams
now raise a TypeError. Previously, copying failed with a RecursionError,
while pickling produced wrong results that eventually caused unpickling to
fail with a RecursionError.

..

.. date: 2023-09-08-12-09-55
.. gh-issue: 108987
.. nonce: x5AIG8
.. section: Library

Fix :func:`_thread.start_new_thread` race condition. If a thread is created
during Python finalization, the newly spawned thread now exits immediately
instead of trying to access freed memory and lead to a crash. Patch by
Victor Stinner.

..

.. date: 2023-09-06-04-30-05
.. gh-issue: 108843
.. nonce: WJMhsS
.. section: Library

Fix an issue in :func:`ast.unparse` when unparsing f-strings containing many
quote types.

..

.. date: 2023-08-30-20-10-28
.. gh-issue: 108682
.. nonce: c2gzLQ
.. section: Library

Enum: raise :exc:`TypeError` if ``super().__new__()`` is called from a
custom ``__new__``.

..

.. date: 2023-08-26-12-35-39
.. gh-issue: 105829
.. nonce: kyYhWI
.. section: Library

Fix concurrent.futures.ProcessPoolExecutor deadlock

..

.. date: 2023-08-22-22-29-42
.. gh-issue: 64662
.. nonce: jHl_Bt
.. section: Library

Fix support for virtual tables in :meth:`sqlite3.Connection.iterdump`. Patch
by Aviv Palivoda.

..

.. date: 2023-08-14-11-18-13
.. gh-issue: 107913
.. nonce: 4ooY6i
.. section: Library

Fix possible losses of ``errno`` and ``winerror`` values in :exc:`OSError`
exceptions if they were cleared or modified by the cleanup code before
creating the exception object.

..

.. date: 2023-05-22-18-39-53
.. gh-issue: 104372
.. nonce: 7tDRaK
.. section: Library

On Linux where :mod:`subprocess` can use the ``vfork()`` syscall for faster
spawning, prevent the parent process from blocking other threads by dropping
the GIL while it waits for the vfork'ed child process ``exec()`` outcome.
This prevents spawning a binary from a slow filesystem from blocking the
rest of the application.

..

.. date: 2022-12-24-12-50-54
.. gh-issue: 84867
.. nonce: OhaLbU
.. section: Library

:class:`unittest.TestLoader` no longer loads test cases from exact
:class:`unittest.TestCase` and :class:`unittest.FunctionTestCase` classes.

..

.. date: 2023-09-10-02-39-06
.. gh-issue: 109209
.. nonce: 0LBewo
.. section: Documentation

The minimum Sphinx version required for the documentation is now 4.2.

..

.. date: 2023-05-29-14-10-24
.. gh-issue: 105052
.. nonce: MGFwbm
.. section: Documentation

Update ``timeit`` doc to specify that time in seconds is just the default.

..

.. date: 2023-03-19-09-39-31
.. gh-issue: 102823
.. nonce: OzsOz0
.. section: Documentation

Document the return type of ``x // y`` when ``x`` and ``y`` have type
:class:`float`.

..

.. date: 2023-09-29-14-11-30
.. gh-issue: 110031
.. nonce: fQnFnc
.. section: Tests

Skip test_threading tests using thread+fork if Python is built with Address
Sanitizer (ASAN). Patch by Victor Stinner.

..

.. date: 2023-09-29-12-48-42
.. gh-issue: 110088
.. nonce: qUhRga
.. section: Tests

Fix test_asyncio timeouts: don't measure the maximum duration, a test should
not measure a CI performance. Only measure the minimum duration when a task
has a timeout or delay. Add ``CLOCK_RES`` to ``test_asyncio.utils``. Patch
by Victor Stinner.

..

.. date: 2023-09-28-18-14-52
.. gh-issue: 110033
.. nonce: 2yHMx0
.. section: Tests

Fix ``test_interprocess_signal()`` of ``test_signal``. Make sure that the
``subprocess.Popen`` object is deleted before the test raising an exception
in a signal handler. Otherwise, ``Popen.__del__()`` can get the exception
which is logged as ``Exception ignored in: ...`` and the test fails. Patch
by Victor Stinner.

..

.. date: 2023-09-28-14-47-14
.. gh-issue: 109594
.. nonce: DB5KPP
.. section: Tests

Fix test_timeout() of test_concurrent_futures.test_wait. Remove the future
which may or may not complete depending if it takes longer than the timeout
ot not. Keep the second future which does not complete before wait()
timeout. Patch by Victor Stinner.

..

.. date: 2023-09-26-00-49-18
.. gh-issue: 109748
.. nonce: nxlT1i
.. section: Tests

Fix ``test_zippath_from_non_installed_posix()`` of test_venv: don't copy
``__pycache__/`` sub-directories, because they can be modified by other
Python tests running in parallel. Patch by Victor Stinner.

..

.. date: 2023-09-20-02-32-17
.. gh-issue: 103053
.. nonce: AoUJuK
.. section: Tests

Skip test_freeze_simple_script() of test_tools.test_freeze if Python is
built with ``./configure --enable-optimizations``, which means with Profile
Guided Optimization (PGO): it just makes the test too slow. The freeze tool
is tested by many other CIs with other (faster) compiler flags. Patch by
Victor Stinner.

..

.. date: 2023-09-14-22-58-47
.. gh-issue: 109396
.. nonce: J1a4jR
.. section: Tests

Fix ``test_socket.test_hmac_sha1()`` in FIPS mode. Use a longer key: FIPS
mode requires at least of at least 112 bits. The previous key was only 32
bits. 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: 2023-09-10-22-32-20
.. gh-issue: 109237
.. nonce: SvgKwD
.. section: Tests

Fix ``test_site.test_underpth_basic()`` when the working directory contains
at least one non-ASCII character: encode the ``._pth`` file to UTF-8 and
enable the UTF-8 Mode to use UTF-8 for the child process stdout. Patch by
Victor Stinner.

..

.. date: 2023-09-10-19-59-57
.. gh-issue: 109230
.. nonce: SRNLFQ
.. section: Tests

Fix ``test_pyexpat.test_exception()``: it can now be run from a directory
different than Python source code directory. Before, the test failed in this
case.  Skip the test if Modules/pyexpat.c source is not available. Skip also
the test on Python implementations other than CPython. Patch by Victor
Stinner.

..

.. date: 2023-09-06-18-27-53
.. gh-issue: 109015
.. nonce: 1dS1AQ
.. section: Tests

Fix test_asyncio, test_imaplib and test_socket tests on FreeBSD if the TCP
blackhole is enabled (``sysctl net.inet.tcp.blackhole``). Skip the few tests
which failed with ``ETIMEDOUT`` which such non standard configuration.
Currently, the `FreeBSD GCP image enables TCP and UDP blackhole
<https://reviews.freebsd.org/D41751>`_ (``sysctl net.inet.tcp.blackhole=2``
and ``sysctl net.inet.udp.blackhole=1``).  Patch by Victor Stinner.

..

.. date: 2023-09-06-15-36-51
.. gh-issue: 91960
.. nonce: P3nD5v
.. section: Tests

Skip ``test_gdb`` if gdb is unable to retrieve Python frame objects: if a
frame is ``<optimized out>``. When Python is built with "clang -Og", gdb can
fail to retrive the *frame* parameter of ``_PyEval_EvalFrameDefault()``. In
this case, tests like ``py_bt()`` are likely to fail. Without getting access
to Python frames, ``python-gdb.py`` is mostly clueless on retrieving the
Python traceback. Moreover, ``test_gdb`` is no longer skipped on macOS if
Python is built with Clang. Patch by Victor Stinner.

..

.. date: 2023-09-05-23-00-09
.. gh-issue: 108962
.. nonce: R4NwuU
.. section: Tests

Skip ``test_tempfile.test_flags()`` if ``chflags()`` fails with "OSError:
[Errno 45] Operation not supported" (ex: on FreeBSD 13). Patch by Victor
Stinner.

..

.. date: 2023-09-04-15-18-14
.. gh-issue: 89392
.. nonce: 8A4T5p
.. section: Tests

Removed support of ``test_main()`` function in tests. They now always use
normal unittest test runner.

..

.. date: 2023-09-03-21-41-10
.. gh-issue: 108851
.. nonce: xFTYOE
.. section: Tests

Fix ``test_tomllib`` recursion tests for WASI buildbots: reduce the
recursion limit and compute the maximum nested array/dict depending on the
current available recursion limit. Patch by Victor Stinner.

..

.. date: 2023-09-03-21-18-35
.. gh-issue: 108851
.. nonce: CCuHyI
.. section: Tests

Add ``get_recursion_available()`` and ``get_recursion_depth()`` functions to
the :mod:`test.support` module. Patch by Victor Stinner.

..

.. date: 2023-09-02-19-06-52
.. gh-issue: 108822
.. nonce: arTbBI
.. section: Tests

``regrtest`` now computes statistics on all tests: successes, failures and
skipped. ``test_netrc``, ``test_pep646_syntax`` and ``test_xml_etree`` now
return results in their ``test_main()`` function. Patch by Victor Stinner
and Alex Waygood.

..

.. date: 2023-08-24-06-10-36
.. gh-issue: 108388
.. nonce: YCVB0D
.. section: Tests

Convert test_concurrent_futures to a package of 7 sub-tests. Patch by Victor
Stinner.

..

.. date: 2023-08-24-04-23-35
.. gh-issue: 108388
.. nonce: mr0MeE
.. section: Tests

Split test_multiprocessing_fork, test_multiprocessing_forkserver and
test_multiprocessing_spawn into test packages. Each package is made of 4
sub-tests: processes, threads, manager and misc. It allows running more
tests in parallel and so reduce the total test duration. Patch by Victor
Stinner.

..

.. date: 2023-06-28-02-51-08
.. gh-issue: 101634
.. nonce: Rayczr
.. section: Tests

When running the Python test suite with ``-jN`` option, if a worker stdout
cannot be decoded from the locale encoding report a failed testn so the
exitcode is non-zero. Patch by Victor Stinner.

..

.. date: 2022-12-08-00-03-37
.. gh-issue: 100086
.. nonce: 1zYpto
.. section: Tests

The Python test runner (libregrtest) now logs Python build information like
"debug" vs "release" build, or LTO and PGO optimizations. Patch by Victor
Stinner.

..

.. date: 2022-10-31-14-47-49
.. gh-issue: 98903
.. nonce: 7KinCV
.. section: Tests

The Python test suite now fails wit exit code 4 if no tests ran. It should
help detecting typos in test names and test methods.

..

.. date: 2022-10-20-17-49-50
.. gh-issue: 95027
.. nonce: viRpJB
.. section: Tests

On Windows, when the Python test suite is run with the ``-jN`` option, the
ANSI code page is now used as the encoding for the stdout temporary file,
rather than using UTF-8 which can lead to decoding errors. Patch by Victor
Stinner.

..

.. date: 2022-06-16-17-50-58
.. gh-issue: 93353
.. nonce: JdpATx
.. section: Tests

regrtest now checks if a test leaks temporary files or directories if run
with -jN option. Patch by Victor Stinner.

..

.. date: 2023-09-02-18-04-15
.. gh-issue: 63760
.. nonce: r8hJ6q
.. section: Build

Fix Solaris build: no longer redefine the ``gethostname()`` function.
Solaris defines the function since 2005. Patch by Victor Stinner, original
patch by Jakub Kulík.

..

.. date: 2023-09-01-01-39-26
.. gh-issue: 108740
.. nonce: JHExAQ
.. section: Build

Fix a race condition in ``make regen-all``. The ``deepfreeze.c`` source and
files generated by Argument Clinic are now generated or updated before
generating "global objects". Previously, some identifiers may miss depending
on the order in which these files were generated. Patch by Victor Stinner.

..

.. date: 2023-09-28-17-09-23
.. gh-issue: 109991
.. nonce: CIMftz
.. section: Windows

Update Windows build to use OpenSSL 3.0.11.

..

.. date: 2023-09-05-10-08-47
.. gh-issue: 107565
.. nonce: CIMftz
.. section: Windows

Update Windows build to use OpenSSL 3.0.10.

..

.. date: 2023-09-27-22-35-22
.. gh-issue: 109991
.. nonce: -xJzaF
.. section: macOS

Update macOS installer to use OpenSSL 3.0.11.

..

.. date: 2023-09-27-23-31-54
.. gh-issue: 109991
.. nonce: sUUYY8
.. section: Tools/Demos

Update GitHub CI workflows to use OpenSSL 3.0.11 and multissltests to use
1.1.1w, 3.0.11, and 3.1.3.