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Callback functions fail to set return value when returning instances of subclassed simple ctypes types

topic-ctypes

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

Status: Open.

#148596 In python/cpython;

· sunmy2019 opened on Apr 15, 2026

ssl.SSLSocket.read() / write() missing ERR_clear_error() before SSL_read_ex() / SSL_write_ex() causes spurious errors with cooperative threading

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

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.

#148594 In python/cpython;

· kswia opened on Apr 15, 2026

Inaccuracies in expression_stmt documentation

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#148592 In python/cpython;

· AEErshov opened on Apr 15, 2026

Will PyCriticalSection support PEP 803?

Status: Open.

#148591 In python/cpython;

· clin1234 opened on Apr 15, 2026

PyThreadState_GetFrame() thread-safety is unclear (and inconsistent with sys._current_frames())

docsDocumentation in the Doc dirDocumentation in the Doc dir

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

topic-free-threading

Status: Open.

#148589 In python/cpython;

· devdanzin opened on Apr 15, 2026

Document __lazy_modules__

docsDocumentation in the Doc dirDocumentation in the Doc dir

topic-lazy-imports

Status: Open.

#148588 In python/cpython;

· johnslavik opened on Apr 14, 2026

Document sys.lazy_modules

docsDocumentation in the Doc dirDocumentation in the Doc dir

topic-lazy-imports

Status: Open.

#148587 In python/cpython;

· johnslavik opened on Apr 14, 2026

CYGWIN supports "/dev/fd" for listing the set of file descriptors open in a process.

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

Status: Open.

#148575 In python/cpython;

· carlo-bramini opened on Apr 14, 2026

_ctypes breaks libffi's NULL-terminated elements invariant for complex types

topic-ctypes

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

Status: Open.

#148573 In python/cpython;

· sunmy2019 opened on Apr 14, 2026

JIT: stale recorded_values leak when specialized op deopts

topic-JIT

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

Status: Open.

#148571 In python/cpython;

· NekoAsakura opened on Apr 14, 2026

JIT build fails on macOS 26: due to .cfi directives

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

Status: Open.

#148560 In python/cpython;

· DarkaMaul opened on Apr 14, 2026

Can't build with ccache emscripten

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

OS-emscripten

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

Status: Open.

#148557 In python/cpython;

· clementperon opened on Apr 14, 2026