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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#150173 In python/cpython;

· edvilme opened on May 20, 2026

shutil._BZ2_SUPPORTED is always True under lazy_imports=all even if it is not supported

3.15pre-release feature fixes, bugs and security fixespre-release feature fixes, bugs and security fixes

3.16new features, bugs and security fixesnew features, bugs and security fixes

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

topic-lazy-imports

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

Status: Open.

#150167 In python/cpython;

· DavidCEllis opened on May 20, 2026

sysconfig variable impermanence in virtual environment when cross-compiling

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

topic-sysconfig

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

Status: Open.

#150162 In python/cpython;

· hetmankp opened on May 20, 2026

Missing critical section for PyDict_Next in _pickle.c

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

topic-free-threading

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

Status: Open.

#150157 In python/cpython;

· KowalskiThomas opened on May 20, 2026

(str|bytes).(r)find don't take kwargs

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.

#150148 In python/cpython;

· smiRaphi opened on May 20, 2026

Reading gzip file with very long filename or comment takes long time

3.13bugs and security fixesbugs and security fixes

3.14bugs and security fixesbugs and security fixes

3.15pre-release feature fixes, bugs and security fixespre-release feature fixes, bugs and security fixes

performancePerformance or resource usagePerformance or resource usage

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.

#150144 In python/cpython;

· serhiy-storchaka opened on May 20, 2026

cpython3.13-opt-jit run pyperformance 2to3 stuck 14 hours and failed "exit code 246"

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.

#150140 In python/cpython;

· sendaoYan opened on May 20, 2026

Bad collisions for frozenset hashes

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

performancePerformance or resource usagePerformance or resource usage

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

Status: Open.

#150134 In python/cpython;

· tim-one opened on May 20, 2026

ConfigParser.items() docstring does not describe the no-argument overload

docsDocumentation in the Doc dirDocumentation in the Doc dir

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

Status: Open.

#150132 In python/cpython;

· Taeknology opened on May 19, 2026

Remove dead try/except StopIteration in asyncio.Lock._wake_up_first

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

topic-asyncio

type-refactorCode refactoring (with no changes in behavior)Code refactoring (with no changes in behavior)

Status: Open.

#150116 In python/cpython;

· deadlovelll opened on May 19, 2026

GitHub free threading CI failing with SIGTERM

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

topic-free-threading

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

Status: Open.

#150114 In python/cpython;

· colesbury opened on May 19, 2026

Error in BaseEventLoop._sock_sendfile_fallback with offset 0

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

topic-asyncio

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

Status: Open.

#150107 In python/cpython;

· SteveJones opened on May 19, 2026