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gh-149162: Use _Py_LOCK_DONT_DETACH in intern_common

awaiting merge

needs backport to 3.14bugs and security fixesbugs and security fixes

topic-free-threading

Status: Open (in progress).

python/cpythonnumber 149164

#149164 In python/cpython;

· colesbury opened on Apr 29, 2026

intern_common should use _Py_LOCK_DONT_DETACH

3.14bugs and security fixesbugs and security fixes

3.15new features, bugs and security fixesnew features, bugs and security fixes

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-free-threading

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#149162 In python/cpython;

· colesbury opened on Apr 29, 2026

_decimal: mpd_context_t::status/traps mutated non-atomically leading to data race

docsDocumentation in the Doc dirDocumentation in the Doc dir

extension-modulesC modules in the Modules dirC modules in the Modules dir

topic-free-threading

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#149142 In python/cpython;

· devdanzin opened on Apr 29, 2026

Potential Deadlock in _Py_qsbr_reserve

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-free-threading

type-crashA hard crash of the interpreter, possibly with a core dumpA hard crash of the interpreter, possibly with a core dump

Status: Open.

#148953 In python/cpython;

· AnnaAr321 opened on Apr 24, 2026

GC in 3.14t can defer too much, resulting in high memory use

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

topic-free-threading

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#148937 In python/cpython;

· nascheme opened on Apr 23, 2026

gh-148906: fix scaling of descriptors on free-threading

awaiting core review

performancePerformance or resource usagePerformance or resource usage

topic-free-threading

Status: Open (in progress).

python/cpythonnumber 148915

#148915 In python/cpython;

· kumaraditya303 opened on Apr 23, 2026

poor scaling of descriptors in free-threading

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

topic-free-threading

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#148906 In python/cpython;

· kumaraditya303 opened on Apr 23, 2026

gh-124397: Add free-threading support for iterators.

awaiting merge

topic-free-threading

type-featureA feature request or enhancementA feature request or enhancement

Status: Open (in progress).

python/cpythonnumber 148894

#148894 In python/cpython;

· rhettinger opened on Apr 22, 2026

Free-threaded and GIL-enabled Windows builds should share an abi3 libpython dll

3.15new features, bugs and security fixesnew features, bugs and security fixes

OS-windows

topic-free-threading

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#148690 In python/cpython;

· ngoldbaum opened on Apr 17, 2026

test_bytes: test_free_threading_bytearray() allocates 1 GiB on free threaded build

testsTests in the Lib/test dirTests in the Lib/test dir

topic-free-threading

Status: Open.

#148605 In python/cpython;

· vstinner opened on Apr 15, 2026

PyThreadState_GetFrame() thread-safety is unclear (and inconsistent with sys._current_frames())

docsDocumentation in the Doc dirDocumentation in the Doc dir

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-free-threading

Status: Open.

#148589 In python/cpython;

· devdanzin opened on Apr 15, 2026

Update qsbr.md doc to be more accurate.

awaiting core review

docsDocumentation in the Doc dirDocumentation in the Doc dir

skip issue

skip news

topic-free-threading

Status: Open (in progress).

python/cpythonnumber 148537

#148537 In python/cpython;

· nascheme opened on Apr 14, 2026