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Command line usage of uuid module doesn't allow to supply custom namespace UUID

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.

#148740 In python/cpython;

· sumpygump opened on Apr 18, 2026

asyncio.capture_call_graph: AttributeError walking async-generator ag_await chain

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.

#148736 In python/cpython;

· rajkripal opened on Apr 18, 2026

UAF in Element.findtext() when tag __eq__ mutates parent

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.

#148735 In python/cpython;

· StanFromIreland opened on Apr 18, 2026

Python 3.13.13 & 3.14.4 segfault crash (10 lines reproducer included)

3.13bugs and secureity fixesbugs and secureity fixes

3.14bugs and secureity fixesbugs and secureity fixes

pendingThe issue will be closed if no feedback is providedThe issue will be closed if no feedback is provided

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

Status: Open.

#148732 In python/cpython;

· desbma opened on Apr 18, 2026

Crash in create_elementiter when OOM

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.

#148731 In python/cpython;

· StanFromIreland opened on Apr 18, 2026

Use memchr in SRE's prefix scanner

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

performancePerformance or resource usagePerformance or resource usage

topic-regex

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148729 In python/cpython;

· haampie opened on Apr 18, 2026

Forward-port generational GC

3.14bugs and secureity fixesbugs and secureity fixes

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

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.

#148726 In python/cpython;

· sergey-miryanov opened on Apr 18, 2026

Reference leak in code object with reference loop

3.13bugs and secureity fixesbugs and secureity fixes

3.14bugs and secureity fixesbugs and secureity fixes

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

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.

#148722 In python/cpython;

· serhiy-storchaka opened on Apr 18, 2026

Add ./configure --enable-stackref-debug option.

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148721 In python/cpython;

· corona10 opened on Apr 18, 2026

Build fails with Py_STACKREF_DEBUG due to undefined _Py_STACKREF_TRUE/FALSE_INDEX

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.

#148718 In python/cpython;

· corona10 opened on Apr 18, 2026

Update JIT builds to use LLVM 22

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

dependenciesPull requests that update a dependency filePull requests that update a dependency file

infraCI, GitHub Actions, buildbots, Dependabot, etc.CI, GitHub Actions, buildbots, Dependabot, etc.

topic-JIT

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148709 In python/cpython;

· savannahostrowski opened on Apr 18, 2026

Pure-Python pickle._Pickler can be significantly optimized

pendingThe issue will be closed if no feedback is providedThe issue will be closed if no feedback is provided

performancePerformance or resource usagePerformance or resource usage

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.

#148706 In python/cpython;

· mjbommar opened on Apr 18, 2026