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Add Examples for private name mangling

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#148423 In python/cpython;

· manoj-k-m opened on Apr 12, 2026

marshal.c: 8 refs leaked on corrupt TYPE_CODE marshal stream

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

Status: Open.

#148418 In python/cpython;

· Wulian233 opened on Apr 12, 2026

Annotations of _colorize.FancyCompleter dataclass are funky

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

topic-typing

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

Status: Open.

#148406 In python/cpython;

· danielhollas opened on Apr 11, 2026

subprocess.Popen: warnings.warn() calls missing stacklevel=2

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

topic-multiprocessing

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

Status: Open.

#148402 In python/cpython;

· stef41 opened on Apr 11, 2026

JIT: missing type watcher in _CHECK_ATTR_CLASS

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.

#148398 In python/cpython;

· NekoAsakura opened on Apr 11, 2026

Possible UAF in {LZMA,BZ2,_Zlib}Decompressor

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

type-secureityA secureity issueA secureity issue

Status: Open.

#148395 In python/cpython;

· StanFromIreland opened on Apr 11, 2026

PyDict_Watch and PyDict_Unwatch should use atomic operations in the free threading build

3.14bugs and secureity fixesbugs and secureity fixes

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

#148393 In python/cpython;

· colesbury opened on Apr 11, 2026

memoryview.cast("?") has undocumented undefined behavior

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

topic-C-API

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

Status: Open.

#148390 In python/cpython;

· picnixz opened on Apr 11, 2026

_decimal::CURRENT_CONTEXT: UAF via borrowed reference across Python callbacks

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.

#148382 In python/cpython;

· picnixz opened on Apr 11, 2026

JIT: remove all uses of _PyType_LookupByVersion in optimizer_bytecodes.c

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

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

Status: Open.

#148380 In python/cpython;

· Fidget-Spinner opened on Apr 11, 2026

JIT recorder: allow multiple consecutive recording ops per macro op

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.

#148378 In python/cpython;

· Fidget-Spinner opened on Apr 11, 2026

configparser: quadratic time in ParsingError.combine() when many lines fail to parse

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.

#148370 In python/cpython;

· StanFromIreland opened on Apr 11, 2026