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t-string tokeniser reports MemoryError on invalid input

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

Status: Open.

#149183 In python/cpython;

· KowalskiThomas opened on Apr 30, 2026

Avoid double checking tp_as_number, tp_as_sequence and tp_as_mapping

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.

#149180 In python/cpython;

· markshannon opened on Apr 30, 2026

REPL: Enable tab completion for from x import <TAB> on Windows

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#149177 In python/cpython;

· ByteFlowing1337 opened on Apr 30, 2026

Pdb: inverted PYTHON_BASIC_REPL check in _pyrepl_available()

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

Status: Open.

#149173 In python/cpython;

· tanloong opened on Apr 30, 2026

Make TypeAliasType __module__ attribute writable

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#149171 In python/cpython;

· ericmarkmartin opened on Apr 30, 2026

pyrepl autocomplete from x import <tab> to only display public members

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#149167 In python/cpython;

· mpkocher opened on Apr 30, 2026

test_capi fails with HWASan

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

Status: Open.

#149165 In python/cpython;

· fmayer opened on Apr 30, 2026

Add PEP 741 PyInitConfig API to the limited C API

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

topic-C-API

Status: Open.

#149163 In python/cpython;

· vstinner opened on Apr 29, 2026

intern_common should use _Py_LOCK_DONT_DETACH

3.14bugs and security fixesbugs and security fixes

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)

topic-free-threading

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

Status: Open.

#149162 In python/cpython;

· colesbury opened on Apr 29, 2026

Removal of implicit event loop creation in asyncio.get_event_loop() breaks batteries-included promise

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

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

topic-asyncio

Status: Open.

#149160 In python/cpython;

· SoundsSerious opened on Apr 29, 2026

test_perf_profiler cores periodically on macOS/aarch64

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

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

Status: Open.

#149156 In python/cpython;

· neek78 opened on Apr 29, 2026

Segfault when cleaning up after a MemoryError with deeply nested objects

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

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

Status: Open.

#149146 In python/cpython;

· stestagg opened on Apr 29, 2026