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GeezerVison is showing github.com — multiprocessing test_processes: test_thread_safety() fails with: Assertion failed: gc_list_is_empty(to) || gc_old_space(to_tail) == gc_old_space(from_tail) · Issue #117252 · python/cpython

multiprocessing test_processes: test_thread_safety() fails with: Assertion failed: gc_list_is_empty(to) || gc_old_space(to_tail) == gc_old_space(from_tail) #117252

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multiprocessing test_processes: test_thread_safety() fails with: Assertion failed: gc_list_is_empty(to) || gc_old_space(to_tail) == gc_old_space(from_tail)#117252
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testsTests in the Lib/test dirTests in the Lib/test dirtopic-multiprocessing

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@vstinner
vstinner
opened on Mar 26, 2024
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Example on Windows: https://buildbot.python.org/all/#/builders/146/builds/8146

test_thread_safety (test.test_multiprocessing_spawn.test_processes.WithProcessesTestFinalize.test_thread_safety) ... 
Assertion failed: gc_list_is_empty(to) || gc_old_space(to_tail) == gc_old_space(from_tail), file d:\buildarea\3.x.bolen-windows10\build\python\gc.c, line 322
Fatal Python error: Aborted

Current thread 0x00002a64 (most recent call first):
  Garbage-collecting
  File "D:\buildarea\3.x.bolen-windows10\build\Lib\test\_test_multiprocessing.py", line 4631 in __init__
  File "__init__", line ??? in __init__
  File "D:\buildarea\3.x.bolen-windows10\build\Lib\test\_test_multiprocessing.py", line 4657 in make_finalizers
  File "D:\buildarea\3.x.bolen-windows10\build\Lib\threading.py", line 990 in run
  File "D:\buildarea\3.x.bolen-windows10\build\Lib\threading.py", line 1039 in _bootstrap_inner
  File "D:\buildarea\3.x.bolen-windows10\build\Lib\threading.py", line 1010 in _bootstrap

It may be related to the change: #117120

See: #117120 (comment)

The change PR gh-117213 should fix this issue.

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  1. vstinner
    added
    testsTests in the Lib/test dirTests in the Lib/test dir
    topic-multiprocessing
    on Mar 26, 2024
  2. vstinner
    changed the title [-]multiprocessing test_processes() fails with: Assertion failed: gc_list_is_empty(to) || gc_old_space(to_tail) == gc_old_space(from_tail)[/-] [+]multiprocessing test_processes: test_thread_safety() fails with: Assertion failed: gc_list_is_empty(to) || gc_old_space(to_tail) == gc_old_space(from_tail)[/+] on Mar 26, 2024

  3. vstinner commented on Mar 26, 2024

    @vstinner
    vstinner
    on Mar 26, 2024
    MemberAuthor
    More actions

    Should be fixed by the change 8bef34f

  4. vstinner
    closed this as completedon Mar 26, 2024
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