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Incorrect error message for ctypes bitfield overflow

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

topic-ctypes

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

Status: Open.

#143164 In python/cpython;

· hyongtao-code opened on Dec 25, 2025

correct usage examples for tachyon sampler

docsDocumentation in the Doc dirDocumentation in the Doc dir

topic-profiling

Status: Open.

#143159 In python/cpython;

· KRRT7 opened on Dec 25, 2025

Hot-cold splitting for JIT stencils

performancePerformance or resource usagePerformance or resource usage

topic-JIT

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#143158 In python/cpython;

· Fidget-Spinner opened on Dec 25, 2025

Replace pre-commit with prek for faster linting

infraCI, GitHub Actions, buildbots, Dependabot, etc.CI, GitHub Actions, buildbots, Dependabot, etc.

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#143148 In python/cpython;

· juhannc opened on Dec 24, 2025

Reference leak in ctypes._build_result() when numretvals > 1 and v == NULL

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

topic-ctypes

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

Status: Open.

#143145 In python/cpython;

· hyongtao-code opened on Dec 24, 2025

<code>test_tracemalloc_track_race</code> segfault on buildbot

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

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

Status: Open.

#143143 In python/cpython;

· colesbury opened on Dec 24, 2025

PYTHONDONTWRITEBYTECODE documentation is incorrect

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#143134 In python/cpython;

· mikekaganski opened on Dec 24, 2025

JIT: Assertion failure in <code>_PyOptimizer_Optimize</code>

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

topic-JIT

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

Status: Open.

#143123 In python/cpython;

· devdanzin opened on Dec 23, 2025

Avoid thread leaks for thread sanitizer

buildThe build process and cross-buildThe build process and cross-build

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

topic-multiprocessing

Status: Open.

#143121 In python/cpython;

· colesbury opened on Dec 23, 2025

Add pixi builds for TSan + free-threading to aid downstream development.

buildThe build process and cross-buildThe build process and cross-build

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#143120 In python/cpython;

· ngoldbaum opened on Dec 23, 2025

JIT: strength reduce _LOAD_FAST{_BORROW} to _LOAD_CONST_INLINE_BORROW

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

topic-JIT

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#143117 In python/cpython;

· Fidget-Spinner opened on Dec 23, 2025

<code>memcpy</code> data race in <code>setobject.c</code>

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.

#143100 In python/cpython;

· colesbury opened on Dec 23, 2025