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memory leak in <code>_PyJit_TryInitializeTracing</code>

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

Status: Open.

#141542 In python/cpython;

· YuanchengJiang opened on Nov 14, 2025

strptime: use %r in error messages, not %s

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

Status: Open.

#141540 In python/cpython;

· alexwlchan opened on Nov 14, 2025

test_code's test for PyUnstable_Eval_RequestCodeExtraIndex corrupts interpreter state

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

Status: Open.

#141536 In python/cpython;

· Yhg1s opened on Nov 13, 2025

test.test_curses.TestCurses.test_terminfo fails on PPC64LE

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

Status: Open.

#141534 In python/cpython;

· mcepl opened on Nov 13, 2025

[C API] Promote PEP 523 functions to public functions: add <code>PyInterpreterState_SetEvalFrameFunc()</code>

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

topic-C-API

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#141518 In python/cpython;

· vstinner opened on Nov 13, 2025

PEP 814: Add built-in frozendict type

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#141510 In python/cpython;

· vstinner opened on Nov 13, 2025

Warning about remaining subinterpreters should suggest using of concurrent.interpreters.Interpeter

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

topic-subinterpreters

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

Status: Open.

#141509 In python/cpython;

· sergey-miryanov opened on Nov 13, 2025

Factor out tracing and optimization heuristics into a single "policy" object.

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)

performancePerformance or resource usagePerformance or resource usage

topic-JIT

Status: Open.

#141504 In python/cpython;

· markshannon opened on Nov 13, 2025

When navigating through local documentation in Firefox, theme setting is not preserved

docsDocumentation in the Doc dirDocumentation in the Doc dir

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

Status: Open.

#141500 In python/cpython;

· lkintact opened on Nov 13, 2025

Change backoff counter to have larger range and backoff more quickly.

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)

performancePerformance or resource usagePerformance or resource usage

topic-JIT

Status: Open.

#141498 In python/cpython;

· markshannon opened on Nov 13, 2025

Incomplete return type for ipaddress.IPv4Network.hosts()

3.13bugs and security fixesbugs and security fixes

3.14bugs and security fixesbugs and security fixes

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

easy

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

Status: Open.

#141497 In python/cpython;

· elWanderero opened on Nov 13, 2025

annotationlib: Simplify <code>__closure__</code> and <code>__code__.co_freevars</code> access in <code>annotationlib._build_closure</code>

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#141489 In python/cpython;

· dr-carlos opened on Nov 13, 2025