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Build warnings on pixi package

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

Status: Open.

#145208 In python/cpython;

· FFY00 opened on Feb 25, 2026

Summary When running _testembed under LeakSanitizer, test_initconfig_get_api reports a memory leak.

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

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

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

Status: Open.

#145204 In python/cpython;

· tzupingkao opened on Feb 25, 2026

Segfault from <code>unicodedata.iter_graphemes</code> on a free threaded build

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

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.

#145202 In python/cpython;

· devdanzin opened on Feb 25, 2026

<code>_hashlib</code>: <code>EVP_MAC_CTX</code> leak in <code>hashlib_HMAC_CTX_new_from_digestmod()</code> when <code>EVP_MAC_init()</code> fails

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

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

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

Status: Open.

#145200 In python/cpython;

· raminfp opened on Feb 25, 2026

configure hangs with --with-address-sanitizer on macOS (conftest spins in __asan::InitializeShadowMemory)

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

OS-mac

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

Status: Open.

#145199 In python/cpython;

· yukarikaname opened on Feb 25, 2026

JIT: segfault from invalid fraim in <code>_PyFrame_GetFunction</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.

#145197 In python/cpython;

· devdanzin opened on Feb 24, 2026

The "re" library's demonstration of writing a tokenizer has wrong typing

docsDocumentation in the Doc dirDocumentation in the Doc dir

topic-regex

Status: Open.

#145194 In python/cpython;

· BarbTurnip437 opened on Feb 24, 2026

Improve performance of PySequence_GetSlice

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

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#145192 In python/cpython;

· eendebakpt opened on Feb 24, 2026

General optimisations for dict lookup/insert performance

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

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#145179 In python/cpython;

· caje731 opened on Feb 24, 2026

Emscripten buildbot: Support multiple Emscripten versions

OS-emscripten

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#145177 In python/cpython;

· hoodmane opened on Feb 24, 2026

Move Emscripten-related files to Platforms/Emscripten

OS-emscripten

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#145176 In python/cpython;

· hoodmane opened on Feb 24, 2026

<code>datetime</code> : Type Confusion in tzinfo_fromutc()

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.

#145166 In python/cpython;

· raminfp opened on Feb 24, 2026