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dict item-iterator: _PyObject_GC_UNTRACK on never-tracked iterator under OOM (dictobject.c)

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

Status: Open.

#152107 In python/cpython;

· zangjiucheng opened on Jun 24, 2026

JIT: Set the IP and check for invalidation in POP_TOP only if Py_Dealloc is called.

3.16new features, bugs and security fixesnew features, bugs and security fixes

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

performancePerformance or resource usagePerformance or resource usage

topic-JIT

Status: Open.

#152106 In python/cpython;

· markshannon opened on Jun 24, 2026

PyUnstable_ExecutableKinds is useless

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

topic-C-API

Status: Open.

#152105 In python/cpython;

· ZeroIntensity opened on Jun 24, 2026

Support set operations in regular expression character classes

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

topic-regex

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#152100 In python/cpython;

· serhiy-storchaka opened on Jun 24, 2026

asyncio.loop.sendfile(fallback=False) raises inconsistent exceptions when native sendfile is unavailable

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

Status: Open.

#152099 In python/cpython;

· tarasko opened on Jun 24, 2026

test_tkinter: test_tk_caret() fails on GHA macOS job

testsTests in the Lib/test dirTests in the Lib/test dir

topic-tkinter

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

Status: Open.

#152093 In python/cpython;

· vstinner opened on Jun 24, 2026

ceval: CALL_LIST_APPEND bytecode leaves a dangling stack reference on the stack on error

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.

#152090 In python/cpython;

· vstinner opened on Jun 24, 2026

Crash in DistributionFinder.context because it is using vars(self).update(kwargs) under memory preasure

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

topic-importlib

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

Status: Open.

#152083 In python/cpython;

· sobolevn opened on Jun 24, 2026

datetime.fromisoformat() (C) drops the sub-second part of a UTC offset, breaking round-trips

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.

#152079 In python/cpython;

· tonghuaroot opened on Jun 24, 2026

Lock contention inside _Py_Specialize_LoadGlobal under free threading

topic-free-threading

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

Status: Open.

#152075 In python/cpython;

· hawkinsp opened on Jun 24, 2026

Bad performance of asyncio.loop.sendfile() fallback

performancePerformance or resource usagePerformance or resource usage

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

topic-asyncio

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

Status: Open.

#152074 In python/cpython;

· tarasko opened on Jun 24, 2026

Line-wrapped syntax highlighting in Python shell spills over into program output

OS-mac

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

topic-replRelated to the interactive shellRelated to the interactive shell

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

Status: Open.

#152068 In python/cpython;

· DroneBetter opened on Jun 24, 2026