- Update to 3.12.0b4:
- gh-issue-102988: CVE-2023-27043 (bsc#1210638): Prevent
:func:`email.utils.parseaddr` and
:func:`email.utils.getaddresses` from returning the realname
portion of an invalid RFC2822 email header in the email
address portion of the 2-tuple returned after being parsed by
:class:`email._parseaddr.AddressList`.
- gh-issue-106396: When the format specification of an
f-string expression is empty, the parser now generates an
empty :class:`ast.JoinedStr` node for it instead of an
one-element :class:`ast.JoinedStr` with an empty string
:class:`ast.Constant`.
- gh-issue-106145: Make ``end_lineno`` and ``end_col_offset``
required on ``type_param`` ast nodes.
- gh-issue-105979: Fix crash in :func:`!_imp.get_frozen_object`
due to improper exception handling.
- gh-issue-98931: Ensure custom :exc:`SyntaxError` error
messages are raised for invalid imports with multiple
targets. Patch by Pablo Galindo
- gh-issue-105908: Fixed bug where :gh:`99111` breaks future
import ``barry_as_FLUFL`` in the Python REPL.
- gh-issue-105340: Include the comprehension iteration
variable in ``locals()`` inside a module- or class-scope
comprehension.
- gh-issue-105486: Change the repr of ``ParamSpec`` list of
args in ``types.GenericAlias``.
- gh-issue-101006: Improve error handling when read
:mod:`marshal` data.
- gh-issue-106524: Fix crash in :func:`!_sre.template` with
templates containing invalid group indices.
- gh-issue-106510: Improve debug output for atomic groups in
regular expressions.
- gh-issue-106503: Fix ref cycle in
:class:`!asyncio._SelectorSocketTransport` by removing
``_write_ready`` in ``close``.
- gh-issue-105497: Fix flag mask inversion when unnamed flags
exist.
- gh-issue-90876: Prevent :mod:`multiprocessing.spawn` from
failing to *import* in environments where ``sys.executable``
is ``None``. This regressed in 3.11 with the addition of
support for path-like objects in multiprocessing.
- gh-issue-106292: Check for an instance-dict
cached value in the :meth:`__get__` method of
:func:`functools.cached_property`. This better matches the
pre-3.12 behavior and improves compatibility for users
subclassing :func:`functools.cached_property` and adding a
:meth:`__set__` method.
- gh-issue-106330: Fix incorrect matching of empty paths in
:meth:`pathlib.PurePath.match`. This bug was introduced in
Python 3.12.0 beta 1.
- gh-issue-102541: Make pydoc.doc catch bad module ImportError
when output stream is not None.
- gh-issue-106152: Added PY_THROW event hook for
:mod:`cProfile` for generators
- gh-issue-106075: Added `asyncio.taskgroups.__all__` to
`asyncio.__all__` for export in star imports.
- gh-issue-105987: Fix crash due to improper reference counting
in :mod:`asyncio` eager task factory internal routines.
- gh-issue-105974: Fix bug where a :class:`typing.Protocol`
class that had one or more non-callable members would
raise :exc:`TypeError` when :func:`issubclass` was called
against it, even if it defined a custom ``__subclasshook__``
method. The behaviour in Python 3.11 and lower -- which has
now been restored -- was not to raise :exc:`TypeError` in
these situations if a custom ``__subclasshook__`` method was
defined. Patch by Alex Waygood.
- gh-issue-96145: Reverted addition of ``json.AttrDict``.
- gh-issue-105497: Fix flag inversion when alias/mask members
exist.
- gh-issue-104554: Add RTSPS scheme support in urllib.parse
- gh-issue-94777: Fix hanging :mod:`multiprocessing`
``ProcessPoolExecutor`` when a child process crashes while
data is being written in the call queue.
- gh-issue-106232: Make timeit doc command lines compatible
with Windows by using double quotes for arguments. This
works on linux and macOS also.
- gh-issue-101634: 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.
- gh-issue-106118: Fix compilation for platforms without
:data:`!O_CLOEXEC`. The issue was introduced with Python
3.12b1 in :gh:`103295`. Patch by Erlend Aasland.
- gh-issue-104692: Include ``commoninstall`` as a prerequisite
for ``bininstall``
This ensures that ``commoninstall`` is completed before
``bininstall`` is started when parallel builds are used (``make
-j install``), and so the ``python3`` symlink is only installed
after all standard library modules are installed.
- gh-issue-106359: Argument Clinic now explicitly forbids
"kwarg splats" in function calls used as annotations.
- gh-issue-105227: The new :c:func:`PyType_GetDict` provides
the dictionary for the given type object that is normally
exposed by ``cls.__dict__``. Normally it's sufficient to
use :c:member:`~PyTypeObject.tp_dict`, but for the static
builtin types :c:member:`!tp_dict` is now always ``NULL``.
:c:func:`!PyType_GetDict()` provides the correct dict object
instead.