Search results

Optimize frozenset construction

performancePerformance or resource usagePerformance or resource usage

sprint

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#150027 In python/cpython;

· ZeroIntensity opened on May 18, 2026

MemoryError during parse can escalate to SystemError and abort on small input

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

topic-parser

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

Status: Open.

#150001 In python/cpython;

· StanFromIreland opened on May 18, 2026

Update typing docstrings

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.

#149995 In python/cpython;

· JelleZijlstra opened on May 18, 2026

Modernize annotation usage in pyrepl

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

topic-replRelated to the interactive shellRelated to the interactive shell

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

Status: Open.

#149985 In python/cpython;

· JelleZijlstra opened on May 18, 2026

Calling PyErr_NoMemory without holding the GIL in winconsoleio.c

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

OS-windows

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

Status: Open.

#149983 In python/cpython;

· aisk opened on May 18, 2026

Improve lazy import test coverage for module level __getattr__

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

topic-lazy-imports

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#149981 In python/cpython;

· sobolevn opened on May 18, 2026

tarfile: _proc_gnulong uses removesuffix("/") but comment claims consistency with frombuf() which uses rstrip("/")

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.

#149980 In python/cpython;

· lpyu001 opened on May 18, 2026

Improve thread-safety in ElementObjects

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

topic-free-threading

topic-XML

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

Status: Open.

#149965 In python/cpython;

· clin1234 opened on May 17, 2026

Document IMAP4.append() message type and optional arguments

docsDocumentation in the Doc dirDocumentation in the Doc dir

topic-email

Status: Open.

#149962 In python/cpython;

· savagemechanic opened on May 17, 2026

CYGWIN doesn't support text mode in POSIX functions like MinGW.

OS-unsupported

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

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

Status: Open.

#149946 In python/cpython;

· carlo-bramini opened on May 17, 2026

Reading gzip headers can lead to OOM for adversarial inputs

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

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

Status: Open.

#149945 In python/cpython;

· KowalskiThomas opened on May 17, 2026

Possible memory leaks when realloc fails

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

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

Status: Open.

#149931 In python/cpython;

· aisk opened on May 17, 2026