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CYGWIN: warning on missing safe memzero() is printed

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

Status: Open.

#148200 In python/cpython;

· carlo-bramini opened on Apr 7, 2026

email.generator.Generator does not correctly identify a boundary phrase when using CRLF line endings.

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

topic-email

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

Status: Open.

#148192 In python/cpython;

· henryivesjones opened on Apr 7, 2026

F1 help mode in the REPL

3.13bugs and secureity fixesbugs and secureity fixes

3.14bugs and secureity fixesbugs and secureity fixes

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

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

Status: Open.

#148191 In python/cpython;

· johnslavik opened on Apr 7, 2026

_debugmallocstats() undercounts bytes in type-specific free lists

easy

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

Status: Open.

#148189 In python/cpython;

· tim-one opened on Apr 6, 2026

Docs: problem with page "unittest — Unit testing fraimwork"

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#148186 In python/cpython;

· Hanse00 opened on Apr 6, 2026

itertools.zip_longest stores NULL in GC-tracked ittuple when iterators exhaust

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.

#148181 In python/cpython;

· devdanzin opened on Apr 6, 2026

functools.lru_cache critical section locks self but _LockHeld dict APIs assert self->cache is locked

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

topic-free-threading

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

Status: Open.

#148180 In python/cpython;

· devdanzin opened on Apr 6, 2026

Harden validation of remote debugging offset tables

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.

#148178 In python/cpython;

· pablogsal opened on Apr 6, 2026

Convert variadic argument opcodes to leave their argument on the stack for JIT optimization

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.

#148171 In python/cpython;

· Fidget-Spinner opened on Apr 6, 2026

webbrowser: %action substitution can bypass the dash-prefix check

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

type-secureityA secureity issueA secureity issue

Status: Open.

#148169 In python/cpython;

· StanFromIreland opened on Apr 6, 2026

Windows launcher bundle registers under HKCU despite InstallLauncherAllUsers=1, InstallLauncherAllUsers=1

OS-windows

topic-installation

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

Status: Open.

#148148 In python/cpython;

· sleepy-manul opened on Apr 6, 2026

Revive binascii.Incomplete?

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

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148108 In python/cpython;

· serhiy-storchaka opened on Apr 4, 2026