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Test suite fails on AMD64 Windows11 Non-Debug 3.x: Python fails with STATUS_VIRUS_INFECTED

OS-windows

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

Status: Open.

#144652 In python/cpython;

· vstinner opened on Feb 10, 2026

Optimize new uops added for trace recording

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

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144651 In python/cpython;

· markshannon opened on Feb 10, 2026

Speed regression in the decimal module due to using heap types

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

performancePerformance or resource usagePerformance or resource usage

topic-subinterpreters

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144650 In python/cpython;

· skirpichev opened on Feb 10, 2026

python 3.13.5 ttktreeview

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

topic-tkinter

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

Status: Open.

#144642 In python/cpython;

· cmiles69 opened on Feb 10, 2026

Ruff erroneously flagging modern syntax as syntax errors due to targeting Python 3.12

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

Status: Open.

#144639 In python/cpython;

· brettcannon opened on Feb 9, 2026

Add test for the PyFunction_GetAnnotations function

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

topic-C-API

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144629 In python/cpython;

· nybblista opened on Feb 9, 2026

Dataclasses trigger <code>__get__</code> on unused <code>ClassVar</code> values

3.13bugs and security fixesbugs and security fixes

3.14bugs and security fixesbugs and security fixes

3.15new 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-dataclasses

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

Status: Open.

#144618 In python/cpython;

· johnslavik opened on Feb 9, 2026

Race condition in Py_FinalizeEx: _PyObject_Dump and "lost sys.stderr" when SIGINT arrives during _PyImport_Cleanup

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.

#144616 In python/cpython;

· raminfp opened on Feb 9, 2026

Extensions that raise exceptions in their <code>PyInit*</code> cause a crash in subinterpreters

3.13bugs and security fixesbugs and security fixes

3.14bugs and security fixesbugs and security fixes

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

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

topic-subinterpreters

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

Status: Open.

#144601 In python/cpython;

· ZeroIntensity opened on Feb 8, 2026

[Windows] Enable ARM64X build

buildThe build process and cross-buildThe build process and cross-build

OS-windows

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144598 In python/cpython;

· dongle-the-gadget opened on Feb 8, 2026

Improve _Py_yield to use light weight cpu instruction

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

performancePerformance or resource usagePerformance or resource usage

topic-free-threading

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144586 In python/cpython;

· corona10 opened on Feb 8, 2026

Remove support for returning non-int's in __int__/__index__()

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

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.

#144584 In python/cpython;

· skirpichev opened on Feb 8, 2026