Search results

Data race between deque.index and deque mutators on Py_SIZE with free-threading

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

Status: Open.

#150750 In python/cpython;

· Naserume opened on Jun 2, 2026

Better error messages when using operators on super() objects

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.

#150745 In python/cpython;

· johnslavik opened on Jun 2, 2026

http.client reads infinite chunked response trailers or 1xx headers

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

type-securityA security issueA security issue

Status: Open.

#150743 In python/cpython;

· gpshead opened on Jun 1, 2026

Optimize leading null unpack idiom in bytecode, allows bare BUILD_SET 0

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#150737 In python/cpython;

· gesslerpd opened on Jun 1, 2026

_IncompleteInputError is leaked in the REPL if input compilation emits SystemError

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

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

Status: Open.

#150732 In python/cpython;

· johnslavik opened on Jun 1, 2026

wsgiref.headers.Headers control-character validation is skipped under -O

Status: Open.

#150726 In python/cpython;

· metsw24-max opened on Jun 1, 2026

Optimise keyword arguments in the JIT

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

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

performancePerformance or resource usagePerformance or resource usage

topic-JIT

Status: Open.

#150724 In python/cpython;

· markshannon opened on Jun 1, 2026

Python 3.15 produces incompatible Jitdumps on MacOS

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

Status: Open.

#150723 In python/cpython;

· not-matthias opened on Jun 1, 2026

Segfault from c stack overflow when under memory pressure

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

Status: Open.

#150722 In python/cpython;

· stestagg opened on Jun 1, 2026

test_profiling.test_sampling_profiler fails randomly on "AMD64 Arch Linux Asan 3.x" buildbot

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

topic-profiling

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

Status: Open.

#150720 In python/cpython;

· vstinner opened on Jun 1, 2026

re: avoid per-call mark-array allocation for patterns with no capturing groups

topic-regex

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#150717 In python/cpython;

· gaborbernat opened on Jun 1, 2026

Speed up datetime.timedelta construction for the common all-integer case

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

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#150716 In python/cpython;

· gaborbernat opened on Jun 1, 2026