| .. date: 2025-12-25-00-38-20 |
| .. gh-issue: 143082 |
| .. nonce: CYUeux |
| .. release date: 2026-01-14 |
| .. section: Windows |
| |
| Fix :mod:`pdb` arrow key history not working when ``stdin`` is |
| ``sys.stdin``. |
| |
| .. |
| |
| .. date: 2025-09-14-13-35-44 |
| .. gh-issue: 128067 |
| .. nonce: BGdP_A |
| .. section: Windows |
| |
| Fix a bug in PyREPL on Windows where output without a trailing newline was |
| overwritten by the next prompt. |
| |
| .. |
| |
| .. date: 2026-01-02-11-44-56 |
| .. gh-issue: 142095 |
| .. nonce: 4ssgnM |
| .. section: Tools/Demos |
| |
| Make gdb 'py-bt' command use frame from thread local state when available. |
| Patch by Sam Gross and Victor Stinner. |
| |
| .. |
| |
| .. date: 2026-01-09-13-52-10 |
| .. gh-issue: 143460 |
| .. nonce: _nW2jt |
| .. section: Tests |
| |
| Skip tests relying on infinite recusion if stack size is unlimited. |
| |
| .. |
| |
| .. date: 2026-01-08-11-50-06 |
| .. gh-issue: 143553 |
| .. nonce: KyyNTt |
| .. section: Tests |
| |
| Add support for parametrized resources, such as ``-u xpickle=2.7``. |
| |
| .. |
| |
| .. bpo: 31391 |
| .. date: 2020-09-29-23-14-01 |
| .. nonce: IZr2P8 |
| .. section: Tests |
| |
| Forward-port test_xpickle from Python 2 to Python 3 and add the resource |
| back to test's command line. |
| |
| .. |
| |
| .. date: 2026-01-12-07-17-38 |
| .. gh-issue: 143706 |
| .. nonce: sysArgv |
| .. section: Library |
| |
| Fix :mod:`multiprocessing` forkserver so that :data:`sys.argv` is correctly |
| set before ``__main__`` is preloaded. Previously, :data:`sys.argv` was empty |
| during main module import in forkserver child processes. This fixes a |
| regression introduced in 3.13.8 and 3.14.1. Root caused by Aaron Wieczorek, |
| test provided by Thomas Watson, thanks! |
| |
| .. |
| |
| .. date: 2026-01-10-16-42-47 |
| .. gh-issue: 143638 |
| .. nonce: du5G7d |
| .. section: Library |
| |
| Forbid reentrant calls of the :class:`pickle.Pickler` and |
| :class:`pickle.Unpickler` methods for the C implementation. Previously, this |
| could cause crash or data corruption, now concurrent calls of methods of the |
| same object raise :exc:`RuntimeError`. |
| |
| .. |
| |
| .. date: 2026-01-10-15-40-57 |
| .. gh-issue: 143658 |
| .. nonce: Ox6pE5 |
| .. section: Library |
| |
| :mod:`importlib.metadata`: Use :meth:`str.translate` to improve performance |
| of :meth:`!importlib.metadata.Prepared.normalize`. Patch by Hugo van |
| Kemenade and Henry Schreiner. |
| |
| .. |
| |
| .. date: 2026-01-10-10-04-08 |
| .. gh-issue: 78724 |
| .. nonce: xkXfxX |
| .. section: Library |
| |
| Raise :exc:`RuntimeError`'s when user attempts to call methods on |
| half-initialized :class:`~struct.Struct` objects, For example, created by |
| ``Struct.__new__(Struct)``. Patch by Sergey B Kirpichev. |
| |
| .. |
| |
| .. date: 2026-01-09-17-50-26 |
| .. gh-issue: 143196 |
| .. nonce: WxKxzU |
| .. section: Library |
| |
| Fix crash when the internal encoder object returned by undocumented function |
| :func:`!json.encoder.c_make_encoder` was called with non-zero second |
| (*_current_indent_level*) argument. |
| |
| .. |
| |
| .. date: 2026-01-09-13-07-22 |
| .. gh-issue: 143191 |
| .. nonce: PPR_vW |
| .. section: Library |
| |
| :func:`_thread.stack_size` now raises :exc:`ValueError` if the stack size is |
| too small. Patch by Victor Stinner. |
| |
| .. |
| |
| .. date: 2026-01-08-14-53-46 |
| .. gh-issue: 143547 |
| .. nonce: wHBVlr |
| .. section: Library |
| |
| Fix :func:`sys.unraisablehook` when the hook raises an exception and changes |
| :func:`sys.unraisablehook`: hold a strong reference to the old hook. Patch |
| by Victor Stinner. |
| |
| .. |
| |
| .. date: 2026-01-08-13-41-58 |
| .. gh-issue: 139686 |
| .. nonce: S_nzkl |
| .. section: Library |
| |
| Revert 0a97941245f1dda6d838f9aaf0512104e5253929 and |
| 57db12514ac686f0a752ec8fe1c08b6daa0c6219 which made importlib.reload a no-op |
| for lazy modules; caused Buildbot failures. |
| |
| .. |
| |
| .. date: 2026-01-07-15-49-06 |
| .. gh-issue: 143517 |
| .. nonce: FP5KgL |
| .. section: Library |
| |
| :func:`annotationlib.get_annotations` no longer raises a :exc:`SyntaxError` |
| when evaluating a stringified starred annotation that starts with one or |
| more whitespace characters followed by a ``*``. Patch by Bartosz Sławecki. |
| |
| .. |
| |
| .. date: 2026-01-06-12-00-00 |
| .. gh-issue: 143474 |
| .. nonce: cQM4VA |
| .. section: Library |
| |
| Add :data:`os.RWF_ATOMIC` constant for Linux 6.11+. |
| |
| .. |
| |
| .. date: 2026-01-05-12-20-42 |
| .. gh-issue: 143445 |
| .. nonce: rgxnbL |
| .. section: Library |
| |
| Speed up :func:`copy.deepcopy` by 1.04x. |
| |
| .. |
| |
| .. date: 2026-01-03-19-41-36 |
| .. gh-issue: 143378 |
| .. nonce: 29AvE7 |
| .. section: Library |
| |
| Fix use-after-free crashes when a :class:`~io.BytesIO` object is |
| concurrently mutated during :meth:`~io.RawIOBase.write` or |
| :meth:`~io.IOBase.writelines`. |
| |
| .. |
| |
| .. date: 2026-01-02-17-26-33 |
| .. gh-issue: 143368 |
| .. nonce: m3EF9E |
| .. section: Library |
| |
| Fix endless retry loop in :mod:`profiling.sampling` blocking mode when |
| threads cannot be seized due to ``EPERM``. Such threads are now skipped |
| instead of causing repeated error messages. Patch by Pablo Galindo. |
| |
| .. |
| |
| .. date: 2026-01-02-12-55-52 |
| .. gh-issue: 143346 |
| .. nonce: iTekce |
| .. section: Library |
| |
| Fix incorrect wrapping of the Base64 data in :class:`!plistlib._PlistWriter` |
| when the indent contains a mix of tabs and spaces. |
| |
| .. |
| |
| .. date: 2026-01-02-09-32-43 |
| .. gh-issue: 140025 |
| .. nonce: zOX58_ |
| .. section: Library |
| |
| :mod:`queue`: Fix :meth:`!SimpleQueue.__sizeof__` computation. |
| |
| .. |
| |
| .. date: 2026-01-01-11-21-57 |
| .. gh-issue: 143310 |
| .. nonce: 8rxtH3 |
| .. section: Library |
| |
| :mod:`tkinter`: fix a crash when a Python :class:`list` is mutated during |
| the conversion to a Tcl object (e.g., when setting a Tcl variable). Patch by |
| Bénédikt Tran. |
| |
| .. |
| |
| .. date: 2025-12-31-20-43-02 |
| .. gh-issue: 143309 |
| .. nonce: cdFxdH |
| .. section: Library |
| |
| Fix a crash in :func:`os.execve` on non-Windows platforms when given a |
| custom environment mapping which is then mutated during parsing. Patch by |
| Bénédikt Tran. |
| |
| .. |
| |
| .. date: 2025-12-31-17-38-33 |
| .. gh-issue: 143308 |
| .. nonce: lY8UCR |
| .. section: Library |
| |
| :mod:`pickle`: fix use-after-free crashes when a |
| :class:`~pickle.PickleBuffer` is concurrently mutated by a custom buffer |
| callback during pickling. Patch by Bénédikt Tran and Aaron Wieczorek. |
| |
| .. |
| |
| .. date: 2025-12-29-21-12-12 |
| .. gh-issue: 142939 |
| .. nonce: OyQQr5 |
| .. section: Library |
| |
| Performance optimisations for :func:`difflib.get_close_matches` |
| |
| .. |
| |
| .. date: 2025-12-29-00-42-26 |
| .. gh-issue: 124951 |
| .. nonce: OsC5K4 |
| .. section: Library |
| |
| The base64 implementation behind the :mod:`binascii`, :mod:`base64`, and |
| related codec has been optimized for modern pipelined CPU architectures and |
| now performs 2-3x faster across all platforms. |
| |
| .. |
| |
| .. date: 2025-12-28-20-28-05 |
| .. gh-issue: 143237 |
| .. nonce: q1ymuA |
| .. section: Library |
| |
| Fix support of named pipes in the rotating :mod:`logging` handlers. |
| |
| .. |
| |
| .. date: 2025-12-28-14-41-02 |
| .. gh-issue: 143249 |
| .. nonce: K4vEp4 |
| .. section: Library |
| |
| Fix possible buffer leaks in Windows overlapped I/O on error handling. |
| |
| .. |
| |
| .. date: 2025-12-28-13-49-06 |
| .. gh-issue: 143241 |
| .. nonce: 5H4b8d |
| .. section: Library |
| |
| :mod:`zoneinfo`: fix infinite loop in :meth:`ZoneInfo.from_file |
| <zoneinfo.ZoneInfo.from_file>` when parsing a malformed TZif file. Patch by |
| Fatih Celik. |
| |
| .. |
| |
| .. date: 2025-12-28-13-12-40 |
| .. gh-issue: 142830 |
| .. nonce: uEyd6r |
| .. section: Library |
| |
| :mod:`sqlite3`: fix use-after-free crashes when the connection's callbacks |
| are mutated during a callback execution. Patch by Bénédikt Tran. |
| |
| .. |
| |
| .. date: 2025-12-27-15-41-27 |
| .. gh-issue: 143200 |
| .. nonce: 2hEUAl |
| .. section: Library |
| |
| :mod:`xml.etree.ElementTree`: fix use-after-free crashes in |
| :meth:`~object.__getitem__` and :meth:`~object.__setitem__` methods of |
| :class:`~xml.etree.ElementTree.Element` when the element is concurrently |
| mutated. Patch by Bénédikt Tran. |
| |
| .. |
| |
| .. date: 2025-12-27-13-47-59 |
| .. gh-issue: 143214 |
| .. nonce: gf6nZK |
| .. section: Library |
| |
| Add the *wrapcol* parameter in :func:`binascii.b2a_base64` and |
| :func:`base64.b64encode`. |
| |
| .. |
| |
| .. date: 2025-12-27-00-14-56 |
| .. gh-issue: 142195 |
| .. nonce: UgBEo5 |
| .. section: Library |
| |
| Updated timeout evaluation logic in :mod:`subprocess` to be compatible with |
| deterministic environments like Shadow where time moves exactly as |
| requested. |
| |
| .. |
| |
| .. date: 2025-12-26-14-51-50 |
| .. gh-issue: 140739 |
| .. nonce: BAbZTo |
| .. section: Library |
| |
| Fix several crashes due to reading invalid memory in the new Tachyon |
| sampling profiler. Patch by Pablo Galindo. |
| |
| .. |
| |
| .. date: 2025-12-25-08-58-55 |
| .. gh-issue: 142164 |
| .. nonce: XrFztf |
| .. section: Library |
| |
| Fix the ctypes bitfield overflow error message to report the correct offset |
| and size calculation. |
| |
| .. |
| |
| .. date: 2025-12-24-14-18-52 |
| .. gh-issue: 143145 |
| .. nonce: eXLw8D |
| .. section: Library |
| |
| Fixed a possible reference leak in ctypes when constructing results with |
| multiple output parameters on error. |
| |
| .. |
| |
| .. date: 2025-12-23-17-07-22 |
| .. gh-issue: 143103 |
| .. nonce: LRjXEW |
| .. section: Library |
| |
| Add padding support to :func:`base64.z85encode` via the ``pad`` parameter. |
| |
| .. |
| |
| .. date: 2025-12-23-11-43-05 |
| .. gh-issue: 130796 |
| .. nonce: TkzUGx |
| .. section: Library |
| |
| Undeprecate the :func:`locale.getdefaultlocale` function. Patch by Victor |
| Stinner. |
| |
| .. |
| |
| .. date: 2025-12-22-18-25-54 |
| .. gh-issue: 74902 |
| .. nonce: HqrWUV |
| .. section: Library |
| |
| Add the :func:`~unicodedata.iter_graphemes` function in the |
| :mod:`unicodedata` module to iterate over grapheme clusters according to |
| rules defined in `Unicode Standard Annex #29, "Unicode Text Segmentation" |
| <https://www.unicode.org/reports/tr29/>`_. Add |
| :func:`~unicodedata.grapheme_cluster_break`, |
| :func:`~unicodedata.indic_conjunct_break` and |
| :func:`~unicodedata.extended_pictographic` functions to get the properties |
| of the character which are related to the above algorithm. |
| |
| .. |
| |
| .. date: 2025-12-22-00-00-00 |
| .. gh-issue: 143004 |
| .. nonce: uaf-counter |
| .. section: Library |
| |
| Fix a potential use-after-free in :meth:`collections.Counter.update` when |
| user code mutates the Counter during an update. |
| |
| .. |
| |
| .. date: 2025-12-21-17-24-29 |
| .. gh-issue: 140648 |
| .. nonce: i8dca6 |
| .. section: Library |
| |
| The :mod:`asyncio` REPL now respects the :option:`-I` flag (isolated mode). |
| Previously, it would load and execute :envvar:`PYTHONSTARTUP` even if the |
| flag was set. Contributed by Bartosz Sławecki. |
| |
| .. |
| |
| .. date: 2025-12-20-10-21-23 |
| .. gh-issue: 142991 |
| .. nonce: jYHD9E |
| .. section: Library |
| |
| Fixed socket operations such as recvfrom() and sendto() for FreeBSD |
| divert(4) socket. |
| |
| .. |
| |
| .. date: 2025-12-19-12-38-01 |
| .. gh-issue: 116738 |
| .. nonce: iMt3Ol |
| .. section: Library |
| |
| Make the attributes in :mod:`lzma` thread-safe on the :term:`free threaded |
| <free threading>` build. |
| |
| .. |
| |
| .. date: 2025-12-18-22-58-46 |
| .. gh-issue: 142950 |
| .. nonce: EJ8w-T |
| .. section: Library |
| |
| Fix regression in :mod:`argparse` where format specifiers in help strings |
| raised :exc:`ValueError`. |
| |
| .. |
| |
| .. date: 2025-12-17-20-18-17 |
| .. gh-issue: 142881 |
| .. nonce: 5IizIQ |
| .. section: Library |
| |
| Fix concurrent and reentrant call of :func:`atexit.unregister`. |
| |
| .. |
| |
| .. date: 2025-12-12-08-51-29 |
| .. gh-issue: 142615 |
| .. nonce: GoJ6el |
| .. section: Library |
| |
| Fix possible crashes when initializing :class:`asyncio.Task` or |
| :class:`asyncio.Future` multiple times. These classes can now be initialized |
| only once and any subsequent initialization attempt will raise a |
| RuntimeError. Patch by Kumar Aditya. |
| |
| .. |
| |
| .. date: 2025-12-10-10-00-06 |
| .. gh-issue: 142517 |
| .. nonce: fG4hbe |
| .. section: Library |
| |
| The non-``compat32`` :mod:`email` policies now correctly handle refolding |
| encoded words that contain bytes that can not be decoded in their specified |
| character set. Previously this resulted in an encoding exception during |
| folding. |
| |
| .. |
| |
| .. date: 2025-12-06-19-49-20 |
| .. gh-issue: 138122 |
| .. nonce: m3EF9E |
| .. section: Library |
| |
| The Tachyon profiler's live TUI now integrates with the experimental |
| :mod:`!_colorize` theming system. Users can customize colors via |
| :func:`!_colorize.set_theme` (experimental API, subject to change). A |
| :class:`!LiveProfilerLight` theme is provided for light terminal |
| backgrounds. Patch by Pablo Galindo. |
| |
| .. |
| |
| .. date: 2025-12-05-17-22-25 |
| .. gh-issue: 142306 |
| .. nonce: Gj3_1m |
| .. section: Library |
| |
| Improve errors for :meth:`Element.remove |
| <xml.etree.ElementTree.Element.remove>`. |
| |
| .. |
| |
| .. date: 2025-10-04-20-48-02 |
| .. gh-issue: 63016 |
| .. nonce: EC9QN_ |
| .. section: Library |
| |
| Add a ``flags`` parameter to :meth:`mmap.mmap.flush` to control |
| synchronization behavior. |
| |
| .. |
| |
| .. date: 2025-09-23-16-41-21 |
| .. gh-issue: 139262 |
| .. nonce: RO0E98 |
| .. section: Library |
| |
| Some keystrokes can be swallowed in the new ``PyREPL`` on Windows, |
| especially when used together with the ALT key. Fix by Chris Eibl. |
| |
| .. |
| |
| .. date: 2025-09-14-22-26-50 |
| .. gh-issue: 138897 |
| .. nonce: vnUb_L |
| .. section: Library |
| |
| Improved :data:`license`/:data:`copyright`/:data:`credits` display in the |
| :term:`REPL`: now uses a pager. |
| |
| .. |
| |
| .. date: 2025-08-17-00-28-50 |
| .. gh-issue: 135852 |
| .. nonce: lQqOjQ |
| .. section: Library |
| |
| Add :func:`!_winapi.RegisterEventSource`, |
| :func:`!_winapi.DeregisterEventSource` and :func:`!_winapi.ReportEvent`. |
| Using these functions in :class:`~logging.handlers.NTEventLogHandler` to |
| replace :mod:`!pywin32`. |
| |
| .. |
| |
| .. date: 2025-06-22-18-57-19 |
| .. gh-issue: 109263 |
| .. nonce: f92V95 |
| .. section: Library |
| |
| Starting a process from spawn context in :mod:`multiprocessing` no longer |
| sets the start method globally. |
| |
| .. |
| |
| .. date: 2025-04-19-17-34-11 |
| .. gh-issue: 132715 |
| .. nonce: XXl47F |
| .. section: Library |
| |
| Skip writing objects during marshalling once a failure has occurred. |
| |
| .. |
| |
| .. date: 2025-10-30-19-28-42 |
| .. gh-issue: 140806 |
| .. nonce: RBT9YH |
| .. section: Documentation |
| |
| Add documentation for :func:`enum.bin`. |
| |
| .. |
| |
| .. date: 2026-01-12-22-49-36 |
| .. gh-issue: 134584 |
| .. nonce: guDlsj |
| .. section: Core and Builtins |
| |
| Eliminate redundant refcounting from ``_CONTAINS_OP``, ``_CONTAINS_OP_SET`` |
| and ``_CONTAINS_OP_DICT``. |
| |
| .. |
| |
| .. date: 2026-01-10-17-13-04 |
| .. gh-issue: 143604 |
| .. nonce: BygbVT |
| .. section: Core and Builtins |
| |
| Fix a reference counting issue in the JIT tracer where the current executor |
| could be prematurely freed during tracing. |
| |
| .. |
| |
| .. date: 2026-01-06-12-30-03 |
| .. gh-issue: 143469 |
| .. nonce: vHVhEY |
| .. section: Core and Builtins |
| |
| Enable :opcode:`!LOAD_ATTR_MODULE` specialization even if |
| :func:`!__getattr__` is defined in module. |
| |
| .. |
| |
| .. date: 2026-01-04-23-53-42 |
| .. gh-issue: 134584 |
| .. nonce: CNrxI_ |
| .. section: Core and Builtins |
| |
| Eliminate redundant refcounting from ``TO_BOOL_STR``. |
| |
| .. |
| |
| .. date: 2026-01-04-16-56-17 |
| .. gh-issue: 143377 |
| .. nonce: YJqMCa |
| .. section: Core and Builtins |
| |
| Fix a crash in :func:`!_interpreters.capture_exception` when the exception |
| is incorrectly formatted. Patch by Bénédikt Tran. |
| |
| .. |
| |
| .. date: 2026-01-04-11-08-20 |
| .. gh-issue: 139757 |
| .. nonce: AR6LG0 |
| .. section: Core and Builtins |
| |
| Add ``BINARY_OP_SUBSCR_USTR_INT`` to specialize reading an ASCII character |
| from any string. Patch by Chris Eibl. |
| |
| .. |
| |
| .. date: 2026-01-03-15-44-51 |
| .. gh-issue: 141504 |
| .. nonce: sbnJlM |
| .. section: Core and Builtins |
| |
| Factor out tracing and optimization heuristics into a single object. Patch |
| by Donghee Na. |
| |
| .. |
| |
| .. date: 2026-01-03-14-47-49 |
| .. gh-issue: 142982 |
| .. nonce: 0lAtc7 |
| .. section: Core and Builtins |
| |
| Specialize :opcode:`CALL_FUNCTION_EX` for Python and non-Python callables. |
| |
| .. |
| |
| .. date: 2026-01-03-14-02-11 |
| .. gh-issue: 136924 |
| .. nonce: UMgdPn |
| .. section: Core and Builtins |
| |
| The interactive help mode in the :term:`REPL` no longer incorrectly syntax |
| highlights text input as Python code. Contributed by Olga Matoula. |
| |
| .. |
| |
| .. date: 2026-01-02-22-35-12 |
| .. gh-issue: 139757 |
| .. nonce: v5LRew |
| .. section: Core and Builtins |
| |
| Fix unintended bytecode specialization for non-ascii string. Patch by |
| Donghee Na, Ken Jin and Chris Eibl. |
| |
| .. |
| |
| .. date: 2026-01-02-17-11-16 |
| .. gh-issue: 143361 |
| .. nonce: YDnvdC |
| .. section: Core and Builtins |
| |
| Add ``PY_VECTORCALL_ARGUMENTS_OFFSET`` to |
| ``_Py_CallBuiltinClass_StackRefSteal`` to avoid redundant allocations |
| |
| .. |
| |
| .. date: 2026-01-01-23-41-50 |
| .. gh-issue: 131798 |
| .. nonce: QUqDdK |
| .. section: Core and Builtins |
| |
| The JIT optimizer now understands more generator instructions. |
| |
| .. |
| |
| .. date: 2026-01-01-17-01-24 |
| .. gh-issue: 134584 |
| .. nonce: nis8LC |
| .. section: Core and Builtins |
| |
| Eliminate redundant refcounting from ``_LOAD_ATTR_SLOT``. |
| |
| .. |
| |
| .. date: 2025-12-30-06-48-48 |
| .. gh-issue: 143189 |
| .. nonce: in_sv2 |
| .. section: Core and Builtins |
| |
| Fix crash when inserting a non-:class:`str` key into a split table |
| dictionary when the key matches an existing key in the split table but has |
| no corresponding value in the dict. |
| |
| .. |
| |
| .. date: 2025-12-27-23-57-43 |
| .. gh-issue: 143228 |
| .. nonce: m3EF9E |
| .. section: Core and Builtins |
| |
| Fix use-after-free in perf trampoline when toggling profiling while threads |
| are running or during interpreter finalization with daemon threads active. |
| The fix uses reference counting to ensure trampolines are not freed while |
| any code object could still reference them. Pach by Pablo Galindo |
| |
| .. |
| |
| .. date: 2025-12-27-13-18-12 |
| .. gh-issue: 142664 |
| .. nonce: peeEDV |
| .. section: Core and Builtins |
| |
| Fix a use-after-free crash in :meth:`memoryview.__hash__ <object.__hash__>` |
| when the ``__hash__`` method of the referenced object mutates that object or |
| the view. Patch by Bénédikt Tran. |
| |
| .. |
| |
| .. date: 2025-12-27-12-25-06 |
| .. gh-issue: 142557 |
| .. nonce: KWOc8b |
| .. section: Core and Builtins |
| |
| Fix a use-after-free crash in :ref:`bytearray.__mod__ <bytes-formatting>` |
| when the :class:`!bytearray` is mutated while formatting the ``%``-style |
| arguments. Patch by Bénédikt Tran. |
| |
| .. |
| |
| .. date: 2025-12-27-10-14-26 |
| .. gh-issue: 143195 |
| .. nonce: MNldfr |
| .. section: Core and Builtins |
| |
| Fix use-after-free crashes in :meth:`bytearray.hex` and |
| :meth:`memoryview.hex` when the separator's :meth:`~object.__len__` mutates |
| the original object. Patch by Bénédikt Tran. |
| |
| .. |
| |
| .. date: 2025-12-26-11-00-44 |
| .. gh-issue: 143183 |
| .. nonce: rhxzZr |
| .. section: Core and Builtins |
| |
| Fix a bug in the JIT when dealing with unsupported control-flow or |
| operations. |
| |
| .. |
| |
| .. date: 2025-12-24-13-44-24 |
| .. gh-issue: 142975 |
| .. nonce: 8C4vIP |
| .. section: Core and Builtins |
| |
| Fix crash after unfreezing all objects tracked by the garbage collector on |
| the :term:`free threaded <free threading>` build. |
| |
| .. |
| |
| .. date: 2025-12-24-11-39-59 |
| .. gh-issue: 143135 |
| .. nonce: 3d5ovx |
| .. section: Core and Builtins |
| |
| Set :data:`sys.flags.inspect` to ``1`` when :envvar:`PYTHONINSPECT` is |
| ``0``. Previously, it was set to ``0`` in this case. |
| |
| .. |
| |
| .. date: 2025-12-23-23-36-41 |
| .. gh-issue: 143123 |
| .. nonce: -51gt_ |
| .. section: Core and Builtins |
| |
| Protect the JIT against recursive tracing. |
| |
| .. |
| |
| .. date: 2025-12-23-23-06-11 |
| .. gh-issue: 143092 |
| .. nonce: 6MISbb |
| .. section: Core and Builtins |
| |
| Fix a crash in the JIT when dealing with ``list.append(x)`` style code. |
| |
| .. |
| |
| .. date: 2025-12-23-00-13-02 |
| .. gh-issue: 143003 |
| .. nonce: 92g5qW |
| .. section: Core and Builtins |
| |
| Fix an overflow of the shared empty buffer in :meth:`bytearray.extend` when |
| ``__length_hint__()`` returns 0 for non-empty iterator. |
| |
| .. |
| |
| .. date: 2025-12-22-22-37-53 |
| .. gh-issue: 143006 |
| .. nonce: ZBQwbN |
| .. section: Core and Builtins |
| |
| Fix a possible assertion error when comparing negative non-integer ``float`` |
| and ``int`` with the same number of bits in the integer part. |
| |
| .. |
| |
| .. date: 2025-12-22-16-22-02 |
| .. gh-issue: 116738 |
| .. nonce: caQuq_ |
| .. section: Core and Builtins |
| |
| Fix thread safety of :func:`contextvars.Context.run`. |
| |
| .. |
| |
| .. date: 2025-12-17-19-45-10 |
| .. gh-issue: 142829 |
| .. nonce: ICtLXy |
| .. section: Core and Builtins |
| |
| Fix a use-after-free crash in :class:`contextvars.Context` comparison when a |
| custom ``__eq__`` method modifies the context via |
| :meth:`~contextvars.ContextVar.set`. |
| |
| .. |
| |
| .. date: 2025-12-17-10-12-09 |
| .. gh-issue: 142863 |
| .. nonce: ZW2ZF8 |
| .. section: Core and Builtins |
| |
| Generate optimized bytecode when calling :class:`list` or :class:`set` with |
| generator expression. |
| |
| .. |
| |
| .. date: 2025-11-19-20-42-21 |
| .. gh-issue: 41779 |
| .. nonce: Psz9Vo |
| .. section: Core and Builtins |
| |
| Allowed defining any :ref:`__slots__ <slots>` for a class derived from |
| :class:`tuple` (including classes created by |
| :func:`collections.namedtuple`). |
| |
| .. |
| |
| .. date: 2025-09-30-21-59-56 |
| .. gh-issue: 69605 |
| .. nonce: qcmGF3 |
| .. section: Core and Builtins |
| |
| Fix edge-cases around already imported modules in the :term:`REPL` |
| auto-completion of imports. |
| |
| .. |
| |
| .. date: 2025-09-06-08-29-08 |
| .. gh-issue: 138568 |
| .. nonce: iZlalC |
| .. section: Core and Builtins |
| |
| Adjusted the built-in :func:`help` function so that empty inputs are ignored |
| in interactive mode. |
| |
| .. |
| |
| .. date: 2025-08-10-12-46-36 |
| .. gh-issue: 131798 |
| .. nonce: 5ys0H_ |
| .. section: Core and Builtins |
| |
| Remove bounds check when indexing into tuples with a constant index. |
| |
| .. |
| |
| .. date: 2025-06-23-20-54-15 |
| .. gh-issue: 134584 |
| .. nonce: ZNcziF |
| .. section: Core and Builtins |
| |
| Eliminate redundant refcounting from ``_CALL_TYPE_1``. Patch by Tomas Roun |
| |
| .. |
| |
| .. date: 2025-04-04-20-38-29 |
| .. gh-issue: 132108 |
| .. nonce: UwZIQy |
| .. section: Core and Builtins |
| |
| Speed up :meth:`int.from_bytes` when passed object supports :ref:`buffer |
| protocol <bufferobjects>`, like :class:`bytearray` by ~1.2x. |
| |
| .. |
| |
| .. date: 2024-12-29-21-33-08 |
| .. gh-issue: 128334 |
| .. nonce: 3c5Nou |
| .. section: Core and Builtins |
| |
| Make the :class:`slice` class subscriptable at runtime to be consistent with |
| typing implementation. |
| |
| .. |
| |
| .. date: 2025-11-17-17-46-16 |
| .. gh-issue: 141671 |
| .. nonce: cVXNW5 |
| .. section: C API |
| |
| :c:macro:`PyMODINIT_FUNC` (and the new :c:macro:`PyMODEXPORT_FUNC`) now adds |
| a linkage declaration (``__declspec(dllexport)``) on Windows. |
