Description

YaoJiayi

opened on Feb 28, 2023

Issue body actions

Crash report

The following code snippet crashes with core dumped:

import unittest
from test import support
import sys

class Tests(unittest.TestCase):
    def test_bug(self):
        modules = set()
        for name, module in sys.modules.items():
            modules.add(module)
        new_tuples = tuple(modules)
        new_set = set(new_tuples)
        print('')
        print('sys.modules:')
        print('')
        import pprint
        pprint.pprint(modules)
        print('')
        print('len(sys.modules):', len(modules))


def test_main():
    support.run_unittest(Tests)

if __name__ == '__main__':
    test_main()

Error messages

(<object object at 0x7f0fe7b6d6a0>, <NULL>, <NULL>, <NULL>, <NULL>, <NULL>, <NULL>, <NULL>, <NULL>, <NULL>)
Segmentation fault (core dumped)

Your environment

• CPython versions tested on: Python 3.9.12
• Operating system and architecture: Linux hx-rs4810gs 5.15.0-57-generic 63~20.04.1-Ubuntu SMP Wed Nov 30 13:40:16 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

Activity

1. YaoJiayi

   added

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

   on Feb 28, 2023
2. zware commented on Feb 28, 2023

   

   zware

   on Feb 28, 2023

   Member

   More actions

   I can't reproduce this on Linux 6.0.12-76060006-generic #202212290932~1674139725~22.04~ca93ccf SMP PREEMPT_DYNAMIC Thu J x86_64 with Python 3.9.14. Can you reproduce with any other version?
3. YaoJiayi commented on Feb 28, 2023

   

   YaoJiayi

   on Feb 28, 2023

   Author

   More actions

   I've just tried Python 3.8.16. It has the same error message.
4. terryjreedy commented on Feb 28, 2023

   

   terryjreedy

   on Feb 28, 2023

   Member

   More actions

   Please reduce the code to the minimum needed to get a crash and then indicate which line it crashes on.
5. YaoJiayi commented on Feb 28, 2023

   

   YaoJiayi

   on Feb 28, 2023

   Author

   More actions

   It seems that "from test import support" produces the crash.
6. zware commented on Feb 28, 2023

   

   zware

   on Feb 28, 2023

   Member

   More actions

   Is that your own test.support module, or the private helper from the standard library test suite?
7. sobolevn commented on Feb 28, 2023

   

   sobolevn

   on Feb 28, 2023

   Member

   More actions

   I cannot reproduce this crash on macos with python 3.9.15, 3.10.2, and 3.12-dev :(
8. zware

   added

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

   on Feb 28, 2023
9. YaoJiayi

   closed this as completedon Mar 1, 2023
10. zware

    closed this as not plannedon Mar 1, 2023
11. zware

    removed

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

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

    on Mar 1, 2023

Issue actions