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JIT: Function version is not re-checked in the optimizer for _CHECK_FUNCTION_VERSION

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

topic-JIT

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

Status: Open.

#146261 In python/cpython;

· Sacul0457 opened on Mar 21, 2026

Incorrect SyntaxError location for walrus operator in multi-line conditional expression

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

topic-parser

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

Status: Open.

#146260 In python/cpython;

· zrekryu opened on Mar 21, 2026

Add --ndjson flag to the profiling.sampling

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

topic-profiling

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#146256 In python/cpython;

· maurycy opened on Mar 21, 2026

SyntaxError.__init__ memory leak on re-initialization

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.

#146250 In python/cpython;

· bkap123 opened on Mar 21, 2026

socketmodule.c: Reference and buffer leaks via audit hook failures

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.

#146245 In python/cpython;

· aisk opened on Mar 21, 2026

initconfig.c: SET_ITEM macro leaks dict on expression failure

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.

#146244 In python/cpython;

· Wulian233 opened on Mar 21, 2026

Support half-floats in the array module

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#146238 In python/cpython;

· skirpichev opened on Mar 21, 2026

datetime: Comparision does not correctly account for folded time

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.

#146236 In python/cpython;

· jepler opened on Mar 21, 2026

Better fork support in cached FastPath instances

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

topic-importlib

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#146228 In python/cpython;

· jaraco opened on Mar 20, 2026

Repeated Python Thread State creation and destruction for foreign threads is slow

docsDocumentation in the Doc dirDocumentation in the Doc dir

performancePerformance or resource usagePerformance or resource usage

topic-free-threading

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#146219 In python/cpython;

· gpshead opened on Mar 20, 2026

HTTP proxy via "CONNECT" tunneling doesn't sanitize CR/LF

3.10only security fixesonly security fixes

3.11only security fixesonly security fixes

3.12only security fixesonly security fixes

3.13bugs and security fixesbugs and security fixes

3.14bugs and security fixesbugs and security fixes

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

type-securityA security issueA security issue

Status: Open.

#146211 In python/cpython;

· sethmlarson opened on Mar 20, 2026

LLVM 22 clang-cl on Windows fails for jit builds

buildThe build process and cross-buildThe build process and cross-build

OS-windows

topic-JIT

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

Status: Open.

#146210 In python/cpython;

· chris-eibl opened on Mar 20, 2026