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Assertion failure at Python/instruction_sequence.c:121: <code>int _PyInstructionSequence_Addop(instr_sequence *, int, int, location): Assertion 'OPCODE_HAS_ARG(opcode) || HAS_TARGET(opcode) || oparg == 0' failed</code>

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

testsTests in the Lib/test dirTests in the Lib/test 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.

#142661 In python/cpython;

· YuanchengJiang opened on Dec 13, 2025

gzip: add tests for memoryview with itemsize &gt; 1 byte

awaiting review

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

Status: Open (in progress).

python/cpythonnumber 141208

#141208 In python/cpython;

· dstndstn opened on Nov 7, 2025

gh-37883: Fix test_resource failures with file size limits

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

Status: Draft (not ready).

python/cpythonnumber 140872

#140872 In python/cpython;

· ritesh006 opened on Nov 1, 2025

gh-140029: avoid impact of system proxies on urllib test suite by mocking relevant functions

awaiting core review

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

Status: Open (in progress).

python/cpythonnumber 140144

#140144 In python/cpython;

· frostming opened on Oct 15, 2025

improve isolation of test_pending_call_creates_thread_subinterpreter

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

Status: Draft (not ready).

python/cpythonnumber 139473

#139473 In python/cpython;

· kumaraditya303 opened on Oct 1, 2025

gh-138216: Fix <code>testGetServBy</code> fails on systems without certain entries in <code>/etc/services</code>

awaiting merge

needs backport to 3.13bugs and security fixesbugs and security fixes

needs backport to 3.14bugs and security fixesbugs and security fixes

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

Status: Open (in progress).

python/cpythonnumber 138219

#138219 In python/cpython;

· ggqlq opened on Aug 28, 2025

gh-137790 Add an option to <code>logging.Formatter</code> to always set <code>record.exc_text</code> even if it's not None

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

Status: Draft (not ready).

python/cpythonnumber 137802

#137802 In python/cpython;

· Harry-Kwon opened on Aug 15, 2025

GH-45322: Add test for glob slash and backslash consistency

awaiting review

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

Status: Open (in progress).

python/cpythonnumber 136834

#136834 In python/cpython;

· moqodow opened on Jul 19, 2025

GH-135904: Add tests for the JIT build process

awaiting core review

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

topic-JIT

Status: Open (in progress).

python/cpythonnumber 136766

#136766 In python/cpython;

· brandtbucher opened on Jul 18, 2025

Remove unneeded <code>zlib</code> dependency in zipfile tests

awaiting review

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

Status: Open (in progress).

python/cpythonnumber 135631

#135631 In python/cpython;

· danny0838 opened on Jun 17, 2025

[WIP, do not merge] add TestGetmethparlist test to getmethparlist

awaiting review

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

Status: Open (in progress).

python/cpythonnumber 135533

#135533 In python/cpython;

· mingdaoy opened on Jun 15, 2025

gh-131178: Add CLI tests for cProfile

awaiting review

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

Status: Open (in progress).

python/cpythonnumber 134269

#134269 In python/cpython;

· ShauryaDusht opened on May 19, 2025