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Use windows-2025 in Github Actions

infraCI, GitHub Actions, buildbots, Dependabot, etc.CI, GitHub Actions, buildbots, Dependabot, etc.

OS-windows

Status: Open.

#150605 In python/cpython;

· chris-eibl opened on May 30, 2026

Stack buffer overflow in bz2 when reusing BZ2Decompressor after error

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.

#150599 In python/cpython;

· StanFromIreland opened on May 30, 2026

compression.zstd: non-determinist with zstd_dict

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.

#150583 In python/cpython;

· Rogdham opened on May 29, 2026

Replace ctypes based Windows console calls in _pyrepl

OS-windows

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.

#150582 In python/cpython;

· aisk opened on May 29, 2026

3.15: Lazy imports break with __getattr__ (concurrent.futures)

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

topic-lazy-imports

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

Status: Open.

#150579 In python/cpython;

· henryiii opened on May 29, 2026

SSL IntFlag enums VerifyFlags and Options are not continuous and contain "false" aliases

Status: Open.

#150577 In python/cpython;

· jbdyn opened on May 29, 2026

Recommend closing resolved or non-actionable issues (oldest-first batch, 2004–2007)

infraCI, GitHub Actions, buildbots, Dependabot, etc.CI, GitHub Actions, buildbots, Dependabot, etc.

Status: Open.

#150566 In python/cpython;

· citadelgrad opened on May 28, 2026

Add additional test coverage for lazy imports

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.

#150565 In python/cpython;

· brittanyrey opened on May 28, 2026

ntpath.ismount() returns True for a UNC server with no share (e.g. \\server, \\?\UNC\server)

OS-windows

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

Status: Open.

#150557 In python/cpython;

· amruthamodela06 opened on May 28, 2026

type('', (), {})__weakref__.__doc__ is inaccurate

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#150553 In python/cpython;

· jonathandung opened on May 28, 2026

codeobject.c: co_tlbc NULL deref + replacement_locations leak

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

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

Status: Open.

#150546 In python/cpython;

· lpyu001 opened on May 28, 2026

test.test_pdb.PdbTestColorize.test_gen_colors fails when pyrepl is unavailable at runtime

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.

#150544 In python/cpython;

· sendaoYan opened on May 28, 2026