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Bare <code>AttributeError</code> in <code>__getattr__</code> shows a garbled message with attribute suggestions

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

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.

#143811 In python/cpython;

· johnslavik opened on Jan 13, 2026

JIT: Assertion <code>size &lt; MAX_EXECUTORS_SIZE</code> failed in <code>get_index_for_executor</code>

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

topic-JIT

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

Status: Open.

#143807 In python/cpython;

· devdanzin opened on Jan 13, 2026

Behaviour of "default" method of cmd.Cmd when no input is sent

docsDocumentation in the Doc dirDocumentation in the Doc dir

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

Status: Open.

#143804 In python/cpython;

· pythonhacker opened on Jan 13, 2026

Improve IDLE Format Paragraph doc

docsDocumentation in the Doc dirDocumentation in the Doc dir

topic-IDLE

Status: Open.

#143774 In python/cpython;

· terryjreedy opened on Jan 13, 2026

NEWS entries for Argument Clinic refactors should be removed

docsDocumentation in the Doc dirDocumentation in the Doc dir

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

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

Status: Open.

#143773 In python/cpython;

· Aniketsy opened on Jan 13, 2026

venv fails with confusing ENOENT when existing venv has broken symlinks

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

topic-venvRelated to the venv moduleRelated to the venv module

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

Status: Open.

#143768 In python/cpython;

· claydugo opened on Jan 13, 2026

Data races in OpenSSL bindings

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

topic-SSL

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

Status: Open.

#143756 In python/cpython;

· colesbury opened on Jan 12, 2026

<code>tkinter</code> source and docs use the word 'slave'

docsDocumentation in the Doc dirDocumentation in the Doc dir

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

topic-tkinter

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

Status: Open.

#143754 In python/cpython;

· i-make-data-sexy opened on Jan 12, 2026

Use OpenSSL instrumented with TSan for TSan tests

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

topic-SSL

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#143750 In python/cpython;

· colesbury opened on Jan 12, 2026

Add C API equivalent for <code>sys._is_gil_enabled()</code>

topic-C-API

topic-free-threading

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#143747 In python/cpython;

· devinrsmith opened on Jan 12, 2026

Broader specialization in the Specializing Adaptive Interpreter for better JIT performance

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

Status: Open.

#143732 In python/cpython;

· markshannon opened on Jan 12, 2026

Issues in asyncio documentation section "A homemade asyncio.sleep"

docsDocumentation in the Doc dirDocumentation in the Doc dir

topic-asyncio

Status: Open.

#143727 In python/cpython;

· padoremu opened on Jan 12, 2026