Cpython: v3.14.9 Release

149 Commits in this Release

Ordered by the degree to which they evolved the repo in this version.

[3.14] gh-158876: Update bundled Expat to 2.9.0 (GH-158881) (#159920)

Authored October 20, 2026

[3.14] gh-157847: Improve more `turtle` docstrings and docs (GH-158562) (#159171)

Authored October 11, 2026

[3.14] gh-157649: Merge test_cppext into test_cext (#158176) (#159264) (#159276)

Authored October 13, 2026

[3.14] gh-153364: Make frame, coroutine, and task-waiter chain walks iterative and bounded (GH-153365) (#158814)

Authored October 5, 2026

[3.14] gh-157847: Re-write more of the `turtle` reference docs (GH-159685) (#159949)

Authored October 21, 2026

[3.14] gh-158585: Fix _PyBytes_Resize() if hash value is already computed (#159585)

Authored October 16, 2026

[3.14] gh-155503: Add more PyType C API tests (#155505) (#159085) (#159089)

Authored October 9, 2026

[3.14] gh-158563: Fix various bugs in `turtle`'s undo handling (GH-158564) (#158610)

Authored October 2, 2026

[3.14] gh-159620: Fix remote asyncio stacks stopping at async generators (GH-159623) (GH-159655)

Authored October 18, 2026

[3.14] gh-157242: Do not close io.BytesIO on MemoryError (#159529)

Authored October 16, 2026

[3.14] gh-158893: Make os.strerror() thread-safe (#159120) (#159145)

Authored October 10, 2026

[3.14] gh-155717: use `spawn` as the default start method for read-only filesystems (GH-155827) (#155886)

Authored October 13, 2026

[3.14] gh-156204: Guard recursion in `PyErr_GivenExceptionMatches` (GH-156205) (GH-158623)

Authored October 2, 2026

[3.14] gh-159041: Fix use-after-free in asyncio task tracking during thread state cleanup (#159073) (#159695)

Authored October 19, 2026

[3.14] gh-155833: GC-untrack MD5/SHA* objects before freeing the HACL* state (GH-155834) (#159790)

Authored October 19, 2026

[3.14] gh-156321: Don't eagerly log exceptions from a cancelled asyncio.shield() (GH-158590) (#158599)

Authored October 2, 2026

[3.14] gh-149816: Fix race in subtype_getweakref in free-threading build (gh-150247) (gh-159363)

Authored October 13, 2026

[3.14] gh-158929: Fix subinterpreter thread safety issues in `syslog` (GH-159000) (GH-159126)

Authored October 10, 2026

[3.14] gh-158445: Detect invalid UCS4 characters in debug mode (#158502) (#159524) (#159540)

Authored October 16, 2026

[3.14] gh-157364: Fix use-after-free in io.TextIOWrapper during reentrant detach (#159600)

Authored October 16, 2026

[3.14] gh-158451: Add _PyUnicodeWriter_WriteLatin1String() test (#158464) (#159549)

Authored October 16, 2026

[3.14] gh-157628: regrtest: Only report a leak if all runs leak one FD (GH-157629) (GH-157753) (#159088)

Authored October 9, 2026

[3.14] gh-146410: Add --pythoninfo option to regrtest (GH-146413) (#158606)

Authored October 5, 2026

[3.14] gh-159759: Fix libpython.static in PEP 739 build-details.json (GH-159766) (#159824)

Authored October 20, 2026

[3.14] gh-149816: #96 Fix a race condition in invoke_gc_callback with free threading (GH-150029) (GH-156119) (#159310)

Authored October 21, 2026

[3.14] gh-159225: PyREPL input should not write to history (GH-159263) (#159370)

Authored October 13, 2026

[3.14] gh-146065: Fix NULL dereference in FutureIter_am_send (GH-158468) (#159871)

Authored October 20, 2026

[3.14] gh-158592: Skip reallocation when shrinking a small list (GH-158787) (gh-159002)

Authored October 8, 2026

[3.14] gh-159184: Do not compare set elements when marshalling a set (GH-159196) (#159206)

Authored October 11, 2026

[3.14] gh-98894: Fix test_dtrace on Solaris (#154803) (#159605)

Authored October 17, 2026

[3.14] gh-159517: Do not use ::tk::unsupported::MacWindowStyle in IDLE on Tk 9.1 (GH-159527) (GH-159625)

Authored October 17, 2026

[3.14] gh-158583: Fix uninitialized memory read in bytes.fromhex() (GH-158584) (#158692)

Authored October 4, 2026

[3.14] gh-156909: Fix `AST.__repr__` call getting the `_fields` attribute (GH-157490) (GH-157596) (GH-159232)

Authored October 13, 2026

[3.14] gh-159320: Enable stack size detection on Android (GH-159321) (#159410)

Authored October 14, 2026

[3.14] gh-133998: Fix gzip file creation when time is out of range (#159592)

Authored October 16, 2026

[3.14] gh-87720 Fix additional header refolding-quoting edge case (GH-134271) (#159067)

Authored October 9, 2026

[3.14] gh-106045: Fix venv path discovery for symlinked executables (GH-156483) (GH-160003)

Authored October 21, 2026

[3.14] gh-152373: Make pdb "until" step over a list comprehension with a breakpoint (GH-152374) (#159958)

Authored October 20, 2026

[3.14] Use _testlimitedcapi in test_free_threading.test_capi (GH-158935) (GH-159146) (#159147)

Authored October 10, 2026

[3.14] gh-159428: Don't read mimetypes.knownfiles by default on Windows (GH-159445)

Authored October 16, 2026