Issues

multiprocessing: spawn and forkserver leak inheritable fds to further sub-processes

python/cpython#161408 · opened

on Nov 5, 2026

1

Audit hooks added before `Py_Initialize()` are freed with the wrong allocator, crashing at exit

python/cpython#161407 · opened

on Nov 5, 2026

`csv.Sniffer` returns a dialect that drops empty space-delimited fields

python/cpython#161400 · opened

on Nov 5, 2026

`aiter()` and `anext()` call `aiter` and `anext` unbound

python/cpython#161394 · opened

on Nov 5, 2026

2

ctypes: `_Pointer.contents` setter casts a `class`-spoofed value to `CDataObject *`

python/cpython#161390 · opened

on Nov 5, 2026

1

tkinter: `setvar()` passes `AsObj`'s NULL to Tcl when the value's `str` raises

python/cpython#161388 · opened

on Nov 5, 2026

decimal: `_decimal` casts the value of its `decimal_context` ContextVar without a type check

python/cpython#161387 · opened

on Nov 5, 2026

ipaddress: IPv6Network.exploded fails for networks with a scope ID

python/cpython#161384 · opened

on Nov 5, 2026

Create a `test` command for `Platforms/WASI`

python/cpython#161367 · opened

on Nov 4, 2026

3

gc debug "collectables" print can deadlock in free threading

python/cpython#161366 · opened

on Nov 4, 2026

Building Programs/_freeze_module sometimes fails with missing symbols, like `undefined reference to PyErr_CheckSignals`

python/cpython#161364 · opened

on Nov 4, 2026

2

test_ast: test_nodes_have_inline_values() fails when test_ast is run twice

python/cpython#161354 · opened

on Nov 4, 2026

4

test_tcl leaked [1, 1, 1] handles on AMD64 Windows Server 2025 Refleaks 3.x

python/cpython#161353 · opened

on Nov 4, 2026

6

test_imaplib failed with ConnectionRefusedError on AMD64 FreeBSD Refleaks 3.15 buildbot

python/cpython#161336 · opened

on Nov 4, 2026

7

Speed up _sre matching of runs of literal characters

python/cpython#161335 · opened

on Nov 4, 2026

1

tarfile: Windows same-drive drive-relative symlink not caught by data filter

python/cpython#161323 · opened

on Nov 4, 2026

Docs: every functions should be in the TOC

python/cpython#161307 · opened

on Nov 4, 2026

8

Add runtime generic alias support to datetime

python/cpython#161304 · opened

on Nov 4, 2026

3

Consider module names for Gecko profiler resources

python/cpython#161299 · opened

on Nov 4, 2026

1

`reprlib.Repr` truncation ignores the length of a custom `fillvalue`

python/cpython#161289 · opened

on Nov 4, 2026

email.header: folding a long header takes quadratic time

python/cpython#161284 · opened

on Nov 4, 2026

optparse: parsing many positional arguments takes quadratic time

python/cpython#161282 · opened

on Nov 4, 2026

2

`_pyio.IOBase.readlines(hint)` stops one line early when the total size read equals hint

python/cpython#161272 · opened

on Nov 3, 2026

3

`_pyio.BufferedRandom.truncate()` keeps the read buffer, so later reads return data that is no longer in the file

python/cpython#161271 · opened

on Nov 3, 2026

3

Lazy `from .sub import sub` in a package is overwritten when the submodule is imported elsewhere

python/cpython#161265 · opened

on Nov 3, 2026

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Issues

multiprocessing: spawn and forkserver leak inheritable fds to further sub-processes

Audit hooks added before `Py_Initialize()` are freed with the wrong allocator, crashing at exit

`csv.Sniffer` returns a dialect that drops empty space-delimited fields

`aiter()` and `anext()` call `aiter` and `anext` unbound

ctypes: `_Pointer.contents` setter casts a `class`-spoofed value to `CDataObject *`

tkinter: `setvar()` passes `AsObj`'s NULL to Tcl when the value's `str` raises

decimal: `_decimal` casts the value of its `decimal_context` ContextVar without a type check

ipaddress: IPv6Network.exploded fails for networks with a scope ID

Create a `test` command for `Platforms/WASI`

gc debug "collectables" print can deadlock in free threading

Building Programs/_freeze_module sometimes fails with missing symbols, like `undefined reference to PyErr_CheckSignals`

test_ast: test_nodes_have_inline_values() fails when test_ast is run twice

test_tcl leaked [1, 1, 1] handles on AMD64 Windows Server 2025 Refleaks 3.x

test_imaplib failed with ConnectionRefusedError on AMD64 FreeBSD Refleaks 3.15 buildbot

Speed up _sre matching of runs of literal characters

tarfile: Windows same-drive drive-relative symlink not caught by data filter

Docs: every functions should be in the TOC

Add runtime generic alias support to datetime

Consider module names for Gecko profiler resources

`reprlib.Repr` truncation ignores the length of a custom `fillvalue`

email.header: folding a long header takes quadratic time

optparse: parsing many positional arguments takes quadratic time

`_pyio.IOBase.readlines(hint)` stops one line early when the total size read equals hint

`_pyio.BufferedRandom.truncate()` keeps the read buffer, so later reads return data that is no longer in the file

Lazy `from .sub import sub` in a package is overwritten when the submodule is imported elsewhere