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JIT: Assertion PyType_Check((PyObject *)type) failed

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.

#149112 In python/cpython;

· devdanzin opened on Apr 28, 2026

JIT: Assertion failure Stack underflow (depth = -1)

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.

#149049 In python/cpython;

· devdanzin opened on Apr 27, 2026

JIT: Assertion next_instr->op.code == STORE_FAST failed in _PyEval_EvalFrameDefault

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.

#143820 In python/cpython;

· devdanzin opened on Jan 14, 2026

JIT: Assertion size < MAX_EXECUTORS_SIZE failed in get_index_for_executor

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

JIT: executor->vm_data.valid assertion failure in unlink_executor

3.14bugs and security fixesbugs and security fixes

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.

#136996 In python/cpython;

· devdanzin opened on Jul 22, 2025