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PGO building failed due to tests

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.

#148244 In python/cpython;

· TrueCat17 opened on Apr 8, 2026

Behaviour change in defaultdict.__missing__ between 3.13.11 and 3.13.12

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.

#148242 In python/cpython;

· cbourjau opened on Apr 8, 2026

String enums in dicts/lists are json serialized differently in Python 3.15

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.

#148241 In python/cpython;

· befeleme opened on Apr 8, 2026

check_extension_modules.py hangs build due to SIGTTIN

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

Status: Open.

#148240 In python/cpython;

· haampie opened on Apr 8, 2026

Cross-interpreter support for efficient sharing of frozendicts

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

topic-subinterpreters

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148234 In python/cpython;

· a-reich opened on Apr 8, 2026

Adding Py_HashBuffer to the Stable ABI

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148233 In python/cpython;

· jakirkham opened on Apr 7, 2026

Enable error overlays in the Python REPL

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-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148228 In python/cpython;

· johnslavik opened on Apr 7, 2026

profiling.sampling is not working for replay mode

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

topic-profiling

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

Status: Open.

#148225 In python/cpython;

· seanleeee13 opened on Apr 7, 2026

Avoid unnecessary NotShareableError creation in XIData FULL_FALLBACK

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.

#148223 In python/cpython;

· jrfk opened on Apr 7, 2026

genericaliasobject.c: Two NULL dereference bugs

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.

#148222 In python/cpython;

· prakashsellathurai opened on Apr 7, 2026

pystats collection is not working with the JIT build

topic-JIT

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

Status: Open.

#148219 In python/cpython;

· eendebakpt opened on Apr 7, 2026

Fix hyphenation in tutorial/stdlib.rst

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#148216 In python/cpython;

· manoj-k-m opened on Apr 7, 2026