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Free-threaded build failure on >3.13.2 versions

3.13bugs and security fixesbugs and security fixes

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

topic-free-threading

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

Status: Open.

#135734 In python/cpython;

· ChrisLovering opened on Jun 19, 2025

Regression in multiprocessing.set_start_method introduced in Python 3.13.4

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

stdlibPython modules in the Lib dirPython modules in the Lib dir

topic-multiprocessing

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

Status: Open.

#135726 In python/cpython;

· marcelotduarte opened on Jun 19, 2025

HTMLParser differences from the HTML5 specification

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

stdlibPython modules in the Lib dirPython modules in the Lib dir

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

Status: Open.

#135661 In python/cpython;

· serhiy-storchaka opened on Jun 18, 2025

Segmentation fault, possibly due to a GC issue

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

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

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

Status: Open.

#135552 In python/cpython;

· fxeqxmulfx opened on Jun 16, 2025

Unhandled <code>armv8l</code> key in <code>sysconfig.get_platform</code> on Android

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

OS-android

stdlibPython modules in the Lib dirPython modules in the Lib dir

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

Status: Open.

#135542 In python/cpython;

· Mrakorez opened on Jun 15, 2025

Worst case quadratic complexity in HTMLParser

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

3.9only security fixesonly security fixes

stdlibPython modules in the Lib dirPython modules in the Lib dir

type-securityA security issueA security issue

Status: Open.

#135462 In python/cpython;

· serhiy-storchaka opened on Jun 13, 2025

3.13 asyncio DatagramTransport buffer size accounting regression.

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

stdlibPython modules in the Lib dirPython modules in the Lib dir

topic-asyncio

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

Status: Open.

#135444 In python/cpython;

· jsbronder opened on Jun 12, 2025

-Werror doesn't error out on DeprecationWarning for os.fork()

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

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.

#135427 In python/cpython;

· fperrin opened on Jun 12, 2025

Segfault from calling <code>StringIO</code> methods in threads on free-threading debug build

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

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

topic-free-threading

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

Status: Open.

#135410 In python/cpython;

· devdanzin opened on Jun 11, 2025

Objects with both <code>__slots__</code> and <code>__dict__</code> have much larger size than needed (up to 4x) on Python 3.13

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

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

performancePerformance or resource usagePerformance or resource usage

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

Status: Open.

#135385 In python/cpython;

· ariebovenberg opened on Jun 11, 2025

Unexpected exceptions when <code>email.policy.Policy.max_line_length</code> is falsey

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

stdlibPython modules in the Lib dirPython modules in the Lib dir

topic-email

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

Status: Open.

#135307 In python/cpython;

· ptwales opened on Jun 9, 2025

Add a CI job for testing OpenSSL 1.1.1 bindings

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

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

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

Status: Open.

#135261 In python/cpython;

· picnixz opened on Jun 8, 2025