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structseq.c: NULL dereference in get_type_attr_as_size #148119

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structseq.c: NULL dereference in get_type_attr_as_size#148119
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interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error
@Wulian233

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@Wulian233
Wulian233
opened on Apr 5, 2026
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Bug report

Bug description:

Parent: #146102

When PyDict_GetItemWithError returns NULL due to error (not missing key), code falls through to PyLong_AsSsize_t(NULL) at line 37 → segfault. Affects PyStructSequence_New, structseq_new_impl, etc.

CPython versions tested on:

CPython main branch

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    interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

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