Search results

Very slow tests during profile generation

OS-unsupported

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.

#148535 In python/cpython;

· yosifkit opened on Apr 13, 2026

struct.pack with format s errors on bytes-like data

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.

#148529 In python/cpython;

· jakirkham opened on Apr 13, 2026

email index error parsing address header ending in'"'

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

topic-email

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

Status: Open.

#148518 In python/cpython;

· bitdancer opened on Apr 13, 2026

optimizer_generator does not respect multiple caches

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.

#148515 In python/cpython;

· Fidget-Spinner opened on Apr 13, 2026

_LOAD_ATTR_PROPERTY_FRAME has too weak checks that are also slow

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.

#148510 In python/cpython;

· Fidget-Spinner opened on Apr 13, 2026

Intermittent iOS buildbot failure in test_preauth_data_to_tls_server

OS-ios

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

topic-SSL

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

Status: Open.

#148508 In python/cpython;

· mhsmith opened on Apr 13, 2026

JIT: Triple dispatching our way into more opcodes

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.

#148506 In python/cpython;

· Fidget-Spinner opened on Apr 13, 2026

Fix cross-block small constant optimization on AArch64

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

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

topic-JIT

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

Status: Open.

#148501 In python/cpython;

· corona10 opened on Apr 13, 2026

Promote PyUnstable_Object_GC_NewWithExtraData() to the stable API

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

topic-C-API

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148498 In python/cpython;

· wjakob opened on Apr 13, 2026

PyMemoryView_FromBuffer discards owner reference from Py_buffer

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

topic-C-API

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

Status: Open.

#148493 In python/cpython;

· alex opened on Apr 13, 2026

Confusing documentation for "py -V"

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

docsDocumentation in the Doc dirDocumentation in the Doc dir

OS-windows

Status: Open.

#148488 In python/cpython;

· serhiy-storchaka opened on Apr 13, 2026

TEST: condition is inverted, test is alway skipped

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.

#148487 In python/cpython;

· mattip opened on Apr 13, 2026