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Windows version from sys.getwindowsversion() is wrong in binaries that do not declare Windows 10 support

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

Status: Open.

#146299 In python/cpython;

· MatejKafka opened on Mar 22, 2026

JIT should abandon rest of trace if we cannot optimize it

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.

#146297 In python/cpython;

· Fidget-Spinner opened on Mar 22, 2026

Add colour to http.server logs

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.

#146292 In python/cpython;

· hugovk opened on Mar 22, 2026

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

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-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: Optimization in _CHECK_FUNCTION_VERSION is wrong

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