Issues

Speed up urllib.parse.unquote() for ASCII input

python/cpython#160690 · opened

on Oct 26, 2026

Builtin modules can't depend on build-helper output because `_freeze_module` links every static module

python/cpython#160689 · opened

on Oct 26, 2026

Add C API tests for PyObject_CopyData and PyBuffer_FillContiguousStrides

python/cpython#160688 · opened

on Oct 26, 2026

ConfigParser.items() does not normalize non-string vars like get()

python/cpython#160684 · opened

on Oct 25, 2026

Windows: remote pdb loses its interrupt connection after about 120 seconds

python/cpython#160683 · opened

on Oct 25, 2026

1

free-threading GC does not properly track references to a running function

python/cpython#160682 · opened

on Oct 25, 2026

Combining the argument-conversion loops in _PyEval_Vector

python/cpython#160679 · opened

on Oct 25, 2026

1

`for` loop swallows exceptions raised by a `sys.monitoring` callback for `StopIteration`

python/cpython#160676 · opened

on Oct 25, 2026

email: generating messages got slower after gh-87720, since folding walks the parse tree repeatedly

python/cpython#160675 · opened

on Oct 25, 2026

`PyDict_Merge` and `PyDict_Update` have conflicting docs: both require `.keys` to exist

python/cpython#160669 · opened

on Oct 25, 2026

Lazy imports break dataclass InitVars in extremely rare scenarios

python/cpython#160665 · opened

on Oct 25, 2026

UAF in GC `visit_generation()`

python/cpython#160663 · opened

on Oct 25, 2026

1

test_except_star does not cover except* handlers raising a non-Exception BaseException

python/cpython#160659 · opened

on Oct 25, 2026

test_subprocess: test_getoutput fails on non-English Windows, as text mode decodes cmd.exe's OEM output as UTF-8

python/cpython#160652 · opened

on Oct 25, 2026

3

pdb: breakpoint() is ignored after quitting a previous session with q

python/cpython#160643 · opened

on Oct 25, 2026

textwrap truncation discards a broken long word (and, for shorten(), the whole text) instead of breaking it further

python/cpython#160633 · opened

on Oct 25, 2026

[macOS x86_64, python >= 3.14] Process hangs when importing ctypes from embedded interpreter in a x86_64 macOS executable with enabled hardened runtime

python/cpython#160627 · opened

on Oct 24, 2026

Windows: python.exe fails to start from a long path because of DLL manifests

python/cpython#160624 · opened

on Oct 24, 2026

socket.recv() and recvfrom() with MSG_TRUNC raise ValueError and lose the datagram since 3.15.1

python/cpython#160622 · opened

on Oct 24, 2026

check_hostname defaults to true when true is invalid

python/cpython#160605 · opened

on Oct 24, 2026

1

`profiling.sampling` in `--binary` mode raises a `UnicodeEncodeError` while collecting the samples

python/cpython#160601 · opened

on Oct 24, 2026

2

mailbox.Babyl returns labels as bytes after reading a mailbox file

python/cpython#160598 · opened

on Oct 24, 2026

Incorrectly formatted error message in `asyncio.proactor_events.sendto()`

python/cpython#160596 · opened

on Oct 24, 2026

free-threaded: setiter_iternext releases the set once per racing thread

python/cpython#160573 · opened

on Oct 24, 2026

1

socket.fromfd() leaks the dup()'d fd when family/type/proto are invalid

python/cpython#160561 · opened

on Oct 24, 2026

7

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Issues

Speed up urllib.parse.unquote() for ASCII input

Builtin modules can't depend on build-helper output because `_freeze_module` links every static module

Add C API tests for PyObject_CopyData and PyBuffer_FillContiguousStrides

ConfigParser.items() does not normalize non-string vars like get()

Windows: remote pdb loses its interrupt connection after about 120 seconds

free-threading GC does not properly track references to a running function

Combining the argument-conversion loops in _PyEval_Vector

`for` loop swallows exceptions raised by a `sys.monitoring` callback for `StopIteration`

email: generating messages got slower after gh-87720, since folding walks the parse tree repeatedly

`PyDict_Merge` and `PyDict_Update` have conflicting docs: both require `.keys` to exist

Lazy imports break dataclass InitVars in extremely rare scenarios

UAF in GC `visit_generation()`

test_except_star does not cover except* handlers raising a non-Exception BaseException

test_subprocess: test_getoutput fails on non-English Windows, as text mode decodes cmd.exe's OEM output as UTF-8

pdb: breakpoint() is ignored after quitting a previous session with q

textwrap truncation discards a broken long word (and, for shorten(), the whole text) instead of breaking it further

[macOS x86_64, python >= 3.14] Process hangs when importing ctypes from embedded interpreter in a x86_64 macOS executable with enabled hardened runtime

Windows: python.exe fails to start from a long path because of DLL manifests

socket.recv() and recvfrom() with MSG_TRUNC raise ValueError and lose the datagram since 3.15.1

check_hostname defaults to true when true is invalid

`profiling.sampling` in `--binary` mode raises a `UnicodeEncodeError` while collecting the samples

mailbox.Babyl returns labels as bytes after reading a mailbox file

Incorrectly formatted error message in `asyncio.proactor_events.sendto()`

free-threaded: setiter_iternext releases the set once per racing thread

socket.fromfd() leaks the dup()'d fd when family/type/proto are invalid