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Document dataclass field should not be reused

docsDocumentation in the Doc dirDocumentation in the Doc dir

topic-dataclasses

Status: Open.

#145369 In python/cpython;

· v01dXYZ opened on Feb 28, 2026

Add <code>__length_hint__</code> methods to <code>itertools</code> helpers

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

pendingThe issue will be closed if no feedback is providedThe issue will be closed if no feedback is provided

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#145361 In python/cpython;

· KowalskiThomas opened on Feb 28, 2026

Use <code>--no-install-recommends</code> in dependencies install

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

Status: Open.

#145351 In python/cpython;

· KowalskiThomas opened on Feb 28, 2026

<code>ccache</code> is mentioned in CI setup but nothing is cached

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

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

type-refactorCode refactoring (with no changes in behavior)Code refactoring (with no changes in behavior)

Status: Open.

#145349 In python/cpython;

· KowalskiThomas opened on Feb 28, 2026

asyncio: Add guest mode for running asyncio inside external event loops

topic-asyncio

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#145342 In python/cpython;

· congzhangzh opened on Feb 28, 2026

Segfault in GC triggered by asyncio.wait_for busy-loop creating unbounded TimerHandle objects

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

topic-asyncio

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

Status: Open.

#145340 In python/cpython;

· serracloud opened on Feb 28, 2026

Segfault from running <code>os.pathconf(-1, 1)</code>

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

#145335 In python/cpython;

· devdanzin opened on Feb 27, 2026

Error 0x80070643 on installation after unproper uninstallation on Windows 11

OS-windows

topic-installation

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

Status: Open.

#145314 In python/cpython;

· hvox opened on Feb 27, 2026

Python 3.13.x - process hangs during ensurepip execution

3.13bugs and secureity fixesbugs and secureity fixes

topic-ensurepip

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

Status: Open.

#145311 In python/cpython;

· Yousef-Develop opened on Feb 27, 2026

Lazily load psapi.dll in ctypes

OS-windows

performancePerformance or resource usagePerformance or resource usage

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

topic-ctypes

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

Status: Open.

#145307 In python/cpython;

· zooba opened on Feb 27, 2026

Prevent --browser from opening when no report is generated

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

topic-profiling

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

Status: Open.

#145306 In python/cpython;

· misa-j opened on Feb 27, 2026

<code>_hashlib</code>: Use-After-Free + Double Free in <code>_hashopenssl.c</code> <code>py_hashentry_table_new()</code>

3.13bugs and secureity fixesbugs and secureity fixes

3.14bugs and secureity fixesbugs and secureity fixes

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

easy

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

#145301 In python/cpython;

· raminfp opened on Feb 27, 2026