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Add a way to ignore JIT stencil digest

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148646 In python/cpython;

· hroncok opened on Apr 16, 2026

PCbuild/build.bat does not propagate the PGO test run exit code

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

Status: Open.

#148644 In python/cpython;

· rdesgroppes opened on Apr 16, 2026

Implement PEP 829 - Package Startup Configuration

3.15new features, bugs and security fixesnew features, bugs and security fixes

DO-NOT-MERGE

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148641 In python/cpython;

· warsaw opened on Apr 16, 2026

Implement PEP 800: typing.disjoint_base

3.15new features, bugs and security fixesnew features, bugs and security fixes

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

topic-typing

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148639 In python/cpython;

· JelleZijlstra opened on Apr 16, 2026

PYTHON_LLTRACE/PYTHON_OPT_DEBUG only reads first character of environment variable

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148638 In python/cpython;

· StepfenShawn opened on Apr 16, 2026

Crash: use-after-free in elementiter_next

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

topic-XML

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

Status: Open.

#148625 In python/cpython;

· kdsjZh opened on Apr 15, 2026

Crash (Sigsev) in JIT optimizer _GUARD_LOAD_SUPER_ATTR_METHOD

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

topic-JIT

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

Status: Open.

#148618 In python/cpython;

· DarkaMaul opened on Apr 15, 2026

pdb: -- argument separator is rejected

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.

#148615 In python/cpython;

· haampie opened on Apr 15, 2026

Data race between gc_should_collect and gc_set_threshold_impl

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.

#148613 In python/cpython;

· Naserume opened on Apr 15, 2026

Unbind method at LOAD_ATTR_CLASS time

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148608 In python/cpython;

· Fidget-Spinner opened on Apr 15, 2026

binascii.b2a_ascii85: wrapcol produces output that a2b_ascii85 cannot decode

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.

#148606 In python/cpython;

· raminfp opened on Apr 15, 2026

test_bytes: test_free_threading_bytearray() allocates 1 GiB on free threaded build

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

topic-free-threading

Status: Open.

#148605 In python/cpython;

· vstinner opened on Apr 15, 2026