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test_embed fails if --exec-prefix and --prefix differ

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

Status: Open.

#151096 In python/cpython;

· djerius opened on Jun 8, 2026

test_ctypes.test_find seems to pass when it shouldn't

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

Status: Open.

#151089 In python/cpython;

· rossburton opened on Jun 8, 2026

It's better to use "Set" to refer to class Set than "Set()"

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#151070 In python/cpython;

· hikorp opened on Jun 8, 2026

mimalloc thread metadata leak

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.

#151065 In python/cpython;

· lunixbochs opened on Jun 8, 2026

ipaddress: 2001:1::3/128 (RFC 9665) missing from IPv6 _private_networks_exceptions, is_global returns False

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

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

Status: Open.

#151049 In python/cpython;

· tonghuaroot opened on Jun 7, 2026

Use-after-free in _Unpickler_ReadIntoFromFile: temporary memoryview passed to readinto() can outlive its buffer

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

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

Status: Open.

#151046 In python/cpython;

· tonghuaroot opened on Jun 7, 2026

venv: Activation in fish inside msys2 (or similar) breaks PATH

OS-windows

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

topic-venvRelated to the venv moduleRelated to the venv module

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

Status: Open.

#151042 In python/cpython;

· LuNoX opened on Jun 7, 2026

3.15.0b2, Fedora 44, riscv64: failing test: test_c_stack_unwind

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.

#151040 In python/cpython;

· davidlt opened on Jun 7, 2026

Crash: NULL deref in _datetime when a static type outlives its module

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

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

Status: Open.

#151039 In python/cpython;

· ashm-dev opened on Jun 7, 2026

sys.remote_exec() is unable to find writable memory when libpython got deleted/replaced on disk

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.

#151029 In python/cpython;

· ambv opened on Jun 6, 2026

_remote_debugging: raising Invalid bytes length on codeobjects with linetable > 4096

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

topic-profiling

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

Status: Open.

#151022 In python/cpython;

· maurycy opened on Jun 6, 2026

3.15.0b2 test failures on FreeBSD 15.1-RC2 arm.armv7

OS-freebsd

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.

#151019 In python/cpython;

· mandree opened on Jun 6, 2026