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_PyCode_VerifyStateless(): Assert Fails If a Name Is Both a Global And an Attr #135437

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_PyCode_VerifyStateless(): Assert Fails If a Name Is Both a Global And an Attr#135437
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ericsnowcurrently
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3.14bugs and security fixes3.15bugs and security fixesinterpreter-core(Objects, Python, Grammar, and Parser dirs)type-crashA hard crash of the interpreter, possibly with a core dump

Description

@ericsnowcurrently
ericsnowcurrently
opened on Jun 12, 2025

Crash report

Bug description:

For example, the following function will trigger the problem:

import pprint

def spam():
    pprint.pprint([])

Crash in test_code (on a debug build):

python: Objects/codeobject.c:1944: _PyCode_SetUnboundVarCounts: Assertion `unbound.total <= counts->unbound.total' failed.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

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Activity

  1. ericsnowcurrently
    self-assigned this
    on Jun 12, 2025
  2. ericsnowcurrently
    added
    interpreter-core(Objects, Python, Grammar, and Parser dirs)
    type-crashA hard crash of the interpreter, possibly with a core dump
    3.14bugs and security fixes
    3.15bugs and security fixes
    on Jun 12, 2025
  3. ericsnowcurrently
    added a commit that references this issue on Jun 13, 2025

    gh-135437: Account For Duplicate Names in _PyCode_SetUnboundVarCounts…

    56eabea
  4. miss-islington
    added a commit that references this issue on Jun 13, 2025

    pythongh-135437: Account For Duplicate Names in _PyCode_SetUnboundVar…

    a713053
  5. ericsnowcurrently
    added a commit that references this issue on Jun 13, 2025

    [3.14] gh-135437: Account For Duplicate Names in _PyCode_SetUnboundVa…

    f77a911
  6. ericsnowcurrently
    closed this as completedon Jun 14, 2025
  7. lkollar
    added a commit that references this issue on Jun 19, 2025

    pythongh-135437: Account For Duplicate Names in _PyCode_SetUnboundVar…

    3da4d4e
  8. Pranjal095
    added a commit that references this issue on Jul 12, 2025

    pythongh-135437: Account For Duplicate Names in _PyCode_SetUnboundVar…

    d5cd564
  9. taegyunkim
    added a commit that references this issue on Aug 4, 2025

    pythongh-135437: Account For Duplicate Names in _PyCode_SetUnboundVar…

    6e2885a
  10. Agent-Hellboy
    added a commit that references this issue on Aug 19, 2025

    pythongh-135437: Account For Duplicate Names in _PyCode_SetUnboundVar…

    6d5fea2
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3.14bugs and security fixes3.15bugs and security fixesinterpreter-core(Objects, Python, Grammar, and Parser dirs)type-crashA hard crash of the interpreter, possibly with a core dump

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