cpython

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Christian Aurich Zanettini Martins 05d80ccfe7 gh-158803: Fix crash in bytes.join() on a concurrently mutated list (#158910 )

In the free-threaded build, bytes.join() and bytearray.join() read
items from the list with borrowed references and without holding its
lock, so another thread could replace and free an item before it was
increfed.

Run the join under Py_BEGIN_CRITICAL_SECTION_SEQUENCE_FAST, as
PyUnicode_Join() already does.

2026-10-08 15:58:00 +02:00

clinic

gh-157407: Use _PyUnicode_AsUTF8NoNUL for AC 's' and 'z' converters (#158210 )

2026-10-05 17:03:27 +00:00

mimalloc

gh-152433: Allow building mimalloc for Windows UWP (GH-152477)

2026-09-07 17:35:51 +01:00

stringlib

gh-158803: Fix crash in bytes.join() on a concurrently mutated list (#158910 )

2026-10-08 15:58:00 +02:00

abstract.c

gh-157526: Call __instancecheck__ and __subclasscheck__ without creating a bound method (#157670 )

2026-09-22 11:16:30 +05:30

boolobject.c

gh-111178: remove redundant casts for functions with correct signatures (#131673 )

2025-04-01 17:18:11 +02:00

bytearrayobject.c

gh-158316: Avoid second buffer fetch on bytearray_decode() (#158485 )

2026-10-01 21:39:34 +00:00

bytes_methods.c

gh-150285: Fix too long docstrings in builtins (GH-150293)

2026-05-24 15:03:32 +03:00

bytesobject.c

gh-158585: Adjust _PyBytes_FormatEx() allocation (#158823 )

2026-10-05 03:09:25 +00:00

call.c

gh-151157: Speed up PyObject_CallMethod via _PyObject_GetMethod (#151158 )

2026-10-05 18:44:28 +00:00

capsule.c

gh-76595: PyCapsule_Import() now imports submodules if needed (GH-6898)

2026-08-10 21:36:15 +03:00

cellobject.c

Fix a stray newline in the cell type docstring (#157240 )

2026-09-10 16:54:47 +01:00

classobject.c

gh-145779: Improve classmethod/staticmethod scaling in free-threaded build (#145826 )

2026-03-17 14:24:44 -04:00

codeobject.c

gh-155742: Use PyBytesWriter in codeobject.c (#157345 )

2026-09-12 05:43:16 +02:00

complexobject.c

gh-155526: Don't check errno in abs(complex) (#155527 )

2026-09-11 17:46:59 +02:00

descrobject.c

gh-157833: Fix specialized C calls with additional method flags (GH-157834)

2026-09-30 14:37:24 +01:00

dictnotes.txt

bpo-46845: Reduce dict size when all keys are Unicode (GH-31564)

2022-03-02 08:09:28 +09:00

dictobject.c

gh-158863: Drop redundant incref/decref pair in dict_dict_merge() (#158864 )

2026-10-06 12:55:46 +02:00

enumobject.c

gh-87613: Argument Clinic vectorcall decorator (GH-145381)

2026-09-10 16:53:36 +02:00

exceptions.c

gh-113318: Better implementation of @getter and @setter in Argument Clinic (GH-156066)

2026-09-19 18:48:39 +03:00

fileobject.c

gh-155496: Use Argument Clinic for more functions and methods (GH-158134)

2026-09-27 19:00:22 +03:00

floatobject.c

gh-158567: Workaround GCC crash in PyFloat_Pack2() (#158568 )

2026-10-01 16:19:26 +00:00

frameobject.c

gh-124697: Represent inlined comprehensions as subscopes in the symbol table (#156819 )

2026-09-23 20:31:57 +01:00

funcobject.c

gh-113318: Better implementation of @getter and @setter in Argument Clinic (GH-156066)

2026-09-19 18:48:39 +03:00

genericaliasobject.c

gh-155752: Do not crash when GenericAlias parameters change during substitution (#155761 )

2026-08-13 22:14:24 -07:00

genobject.c

gh-144446: Fix thread safety of gi_frame, cr_frame and ag_frame in free-threading (#156037 )

2026-09-02 23:26:04 +05:30

interpolationobject.c

gh-150319: Replace all documentation which says "See PEP 585" (#150325 )

2026-06-02 21:13:34 +01:00

iterobject.c

gh-157361: Implement anext() in Python instead of C (#157362 )

2026-09-16 18:58:59 +05:30

lazyimportobject.c

gh-158140: Resolve lazily imported sibling submodules independently (#158521 )

2026-10-02 19:20:04 +02:00

listobject.c

gh-158592: Skip reallocation when shrinking a small list (gh-158787)

2026-10-08 08:58:23 +09:00

listsort.txt

gh-135551: Change how sorting picks minimum run length (#135553 )

2025-06-26 23:48:05 -05:00

longobject.c

gh-158451: Convert _PyUnicodeWriter_Prepare() to static inline function (#158466 )

2026-09-30 05:31:36 +02:00

memoryobject.c

gh-155742: Use PyMem_Malloc() in memoryview.hex() (#158582 )

2026-10-02 17:51:47 +02:00

methodobject.c

gh-157833: Fix specialized C calls with additional method flags (GH-157834)

2026-09-30 14:37:24 +01:00

moduleobject.c

gh-158824: Fix __getattr__ blocking reification of lazy imports (GH-158825)

2026-10-08 14:52:30 +02:00

namespaceobject.c

gh-155496: Use Argument Clinic for more functions and methods (GH-158134)

2026-09-27 19:00:22 +03:00

object_layout_312.gv

GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115)

2024-04-02 11:59:21 +01:00

object_layout_312.png

gh-71648: Optimize PNG files (GH-138842)

2025-09-12 20:13:05 +00:00

object_layout_313.gv

GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115)

2024-04-02 11:59:21 +01:00

object_layout_313.png

gh-71648: Optimize PNG files (GH-138842)

2025-09-12 20:13:05 +00:00

object_layout_full_312.gv

GH-96068: Document object layout (GH-96069)

2022-08-23 13:55:43 +01:00

object_layout_full_312.png

gh-71648: Optimize PNG files (GH-138842)

2025-09-12 20:13:05 +00:00

object_layout_full_313.gv

GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115)

2024-04-02 11:59:21 +01:00

object_layout_full_313.png

gh-71648: Optimize PNG files (GH-138842)

2025-09-12 20:13:05 +00:00

object_layout.md

GH-115776: Allow any fixed sized object to have inline values (GH-123192)

2024-08-21 15:52:04 +01:00

object.c

gh-130706: Add a fast path to _Py_Dealloc() for non-GC objects. (gh-158645)

2026-10-05 21:18:22 +09:00

obmalloc.c

gh-136872: Build pymalloc in sanitizer builds, but disable it by default (GH-157934)

2026-10-07 18:05:37 +02:00

odictobject.c

gh-151627: fix thread safety of OrderedDict iterator creation (#151688 )

2026-08-01 15:27:14 +05:30

picklebufobject.c

gh-135607: remove null checking of weakref list in dealloc of extension modules and objects (#135614 )

2025-06-30 11:14:31 +00:00

rangeobject.c

gh-129068: Make range iterators thread-safe (gh-142886)

2025-12-18 13:11:51 -05:00

README

Issue #18093 : Factor out the programs that embed the runtime

2014-07-25 21:52:14 +10:00

sentinelobject.c

gh-148829: Make sentinels' repr and module customizable (#149654 )

2026-05-19 09:18:56 -07:00

setobject.c

gh-152235: Defer GC tracking in set.union and set.difference (gh-152290)

2026-06-26 17:11:33 +00:00

sliceobject.c

gh-150319: Replace all documentation which says "See PEP 585" (#150325 )

2026-06-02 21:13:34 +01:00

structseq.c

gh-155496: Use Argument Clinic for more functions and methods (GH-158134)

2026-09-27 19:00:22 +03:00

templateobject.c

gh-150319: Replace all documentation which says "See PEP 585" (#150325 )

2026-06-02 21:13:34 +01:00

tupleobject.c

gh-87613: Argument Clinic vectorcall decorator (GH-145381)

2026-09-10 16:53:36 +02:00

typeobject.c

gh-157526: Call __instancecheck__ and __subclasscheck__ without creating a bound method (#157670 )

2026-09-22 11:16:30 +05:30

typevarobject.c

gh-157621: Clear weakrefs for ParamSpec attributes (#157622 )

2026-09-17 02:48:25 +00:00

unicode_format.c

gh-158451: Reuse PyUnicodeWriter_WriteStr() in PyUnicode_Format() (#158467 )

2026-09-30 05:30:22 +02:00

unicode_formatter.c

gh-158451: Convert _PyUnicodeWriter_Prepare() to static inline function (#158466 )

2026-09-30 05:31:36 +02:00

unicode_writer.c

gh-158451: Convert _PyUnicodeWriter_Prepare() to static inline function (#158466 )

2026-09-30 05:31:36 +02:00

unicodectype.c

gh-129117: Add unicodedata.isxidstart() function (#140269 )

2025-10-30 10:18:12 +00:00

unicodeobject.c

gh-158585: Simplify PyBytesWriter_Finish() (#158822 )

2026-10-05 04:47:04 +02:00

unicodetype_db.h

fixes gh-157633: Update Unicode data to Unicode 18.0.0 (#157634 )

2026-09-16 11:34:53 -07:00

unionobject.c

gh-150319: Replace all documentation which says "See PEP 585" (#150325 )

2026-06-02 21:13:34 +01:00

weakrefobject.c

gh-80384: Check that callback is callable at weak reference creation (GH-151145)

2026-06-10 13:34:55 +03:00

README

Source files for various builtin objects