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Creating multiple instances of faulthandler module causes unbalanced refcount on fatal_error.file

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.

#149590 In python/cpython;

· stestagg opened on May 9, 2026

Adding in a new PyList_Pop C-API

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#149589 In python/cpython;

· Vizonex opened on May 9, 2026

_remote_debugging: reading whole pages over and over

3.15pre-release feature fixes, bugs and security fixespre-release feature fixes, bugs and security fixes

3.16new 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-profiling

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

Status: Open.

#149584 In python/cpython;

· maurycy opened on May 8, 2026

tarfile: Failed opening empty PAX TAR with global headers

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.

#149578 In python/cpython;

· spbnick opened on May 8, 2026

Element.itertext() works differently in C and Python implementations

3.13bugs and security fixesbugs and security fixes

3.14bugs and security fixesbugs and security fixes

3.15pre-release feature fixes, bugs and security fixespre-release feature fixes, bugs and security fixes

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

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

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

topic-XML

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

Status: Open.

#149571 In python/cpython;

· serhiy-storchaka opened on May 8, 2026

JIT: tier-2 self-loop hang in FOR_ITER once iterator types exceed MAX_CHAIN_DEPTH

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.

#149570 In python/cpython;

· NekoAsakura opened on May 8, 2026

Remove deprecated shutil.ExecError

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.

#149567 In python/cpython;

· StanFromIreland opened on May 8, 2026

JIT doesn't trace exec()-generated functions called from hot loops

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

topic-JIT

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#149564 In python/cpython;

· kimjune01 opened on May 8, 2026

Tachyon incompatibility with virtual environments on Windows is inconvenient for scripts with dependencies

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.

#149560 In python/cpython;

· pt1243 opened on May 8, 2026

Single-threaded re-entrancy via a recursive generator causes an access violation (segfault) in pairwise_next

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

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

Status: Open.

#149557 In python/cpython;

· eendebakpt opened on May 8, 2026

defaultdict | frozendict returns dict, not defaultdict

3.15pre-release feature fixes, bugs and security fixespre-release feature fixes, bugs and security fixes

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

Status: Open.

#149534 In python/cpython;

· JelleZijlstra opened on May 8, 2026

Remove bool.__invert__ for 3.16

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.

#149532 In python/cpython;

· sobolevn opened on May 8, 2026