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_hashopenssl.c‍: Missing negative return check in EVP_get_block_size and EVP_get_digest_size

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

Status: Open.

#146287 In python/cpython;

· raminfp opened on Mar 22, 2026

slot.__delete__() behaves as non-atomic in free-threading

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.

#146270 In python/cpython;

· x42005e1f opened on Mar 22, 2026

Attempting to assign an infinte generator to an extended slice hangs indefinitely instead of raising ValueError

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

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

Status: Open.

#146268 In python/cpython;

· Next-Door-Tech opened on Mar 22, 2026

Static musl build regression (3.14+): duplicate _Py_LibHacl_* symbols from duplicated Modules/_hacl/*.o

3.14bugs and security fixesbugs and security fixes

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

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

OS-unsupported

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

Status: Open.

#146264 In python/cpython;

· booxter opened on Mar 21, 2026

JIT: Restore previous optimization for _CHECK_FUNCTION_VERSION

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

topic-JIT

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

Status: Open.

#146261 In python/cpython;

· Sacul0457 opened on Mar 21, 2026

Incorrect SyntaxError location for walrus operator in multi-line conditional expression

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

topic-parser

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

Status: Open.

#146260 In python/cpython;

· zrekryu opened on Mar 21, 2026

Add --jsonl flag to the profiling.sampling

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

topic-profiling

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#146256 In python/cpython;

· maurycy opened on Mar 21, 2026

SyntaxError.__init__ memory leak on re-initialization

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

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

Status: Open.

#146250 In python/cpython;

· bkap123 opened on Mar 21, 2026

initconfig.c: SET_ITEM macro leaks dict on expression failure

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

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

Status: Open.

#146244 In python/cpython;

· Wulian233 opened on Mar 21, 2026

Support half-floats in the array module

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#146238 In python/cpython;

· skirpichev opened on Mar 21, 2026

datetime: Comparision does not correctly account for folded time

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

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

Status: Open.

#146236 In python/cpython;

· jepler opened on Mar 21, 2026

Better fork support in cached FastPath instances

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

topic-importlib

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#146228 In python/cpython;

· jaraco opened on Mar 20, 2026