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Uninitialized start and multi_line_start Causing Undefined Behavior - Pointer overflow

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

Status: Open.

#144759 In python/cpython;

· raminfp opened on Feb 12, 2026

Tarfile regression

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

Status: Open.

#144755 In python/cpython;

· mttpgn opened on Feb 12, 2026

Better support for descriptors at dataclass creation

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144749 In python/cpython;

· MrXerios opened on Feb 12, 2026

PEP 475 EINTR retry paths don't check <code>tstate-&gt;async_exc</code>

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

Status: Open.

#144748 In python/cpython;

· samliddicott opened on Feb 12, 2026

test_manual_unwind_respects_frame_pointers fails on x86_64 Fedora Linux with enabled JIT (<code>yes-off</code>)

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

Status: Open.

#144741 In python/cpython;

· befeleme opened on Feb 12, 2026

test_pyexpat.MemoryProtectionTest fails when Python was buitl with expat 2.7.1 but runs with 2.7.2

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

topic-XML

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

Status: Open.

#144739 In python/cpython;

· hroncok opened on Feb 12, 2026

Migrate to modern win32/winrt API for <code>localemodule</code>

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

OS-windows

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144728 In python/cpython;

· mokurin000 opened on Feb 12, 2026

Circular lazy import results in a crash

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

Status: Open.

#144727 In python/cpython;

· ZeroIntensity opened on Feb 12, 2026

test.test_buffer.TestBufferProtocol.test_array_alignment fails on Linux/i586 in 3.15.0~a6

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

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.

#144725 In python/cpython;

· mcepl opened on Feb 11, 2026

Duplicate symbol _Py_jit_entry when built with --enable-exterimental-jit

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

topic-JIT

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

Status: Open.

#144712 In python/cpython;

· jjhelmus opened on Feb 11, 2026

recussiveness of _thread.RLock doesn't work if lock acquired inside signal handler inside lock.acquire

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#144706 In python/cpython;

· xBZZZZ opened on Feb 11, 2026

Use standard terminology in class pattern error message

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.

#144702 In python/cpython;

· sharkdp opened on Feb 11, 2026