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test_pickle are leaked on Windows #104702

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test_pickle are leaked on Windows#104702
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OS-windowstype-bugAn unexpected behavior, bug, or error

Description

@Eclips4
Eclips4
opened on May 20, 2023

Tried on current main branch.

./python -m test -R 3:3 test_pickle
Running Debug|x64 interpreter...
0:00:00 Run tests sequentially
0:00:00 [1/1] test_pickle
beginning 6 repetitions
123456
......
test_pickle leaked [13, 12, 173] references, sum=198
test_pickle leaked [11, 12, 113] memory blocks, sum=136
test_pickle failed (reference leak) in 4 min 30 sec

== Tests result: FAILURE ==

1 test failed:
    test_pickle

Total duration: 4 min 30 sec
Tests result: FAILURE

Also, I cannot reproduce it in Linux (WSL, Ubuntu 20.04)

Linked PRs

Activity

  1. Eclips4
    added
    type-bugAn unexpected behavior, bug, or error
    on May 20, 2023
  2. AlexWaygood
    added
    OS-windows
    on May 20, 2023

  3. Eclips4 commented on May 21, 2023

    @Eclips4
    Eclips4
    on May 21, 2023
    MemberAuthor

    Fantastic... I can't reproduce it anymore. I just try found bad commit using git bisect...
    But I've found reference leak in another way.

     ./python -m test -R 3:3 test_pickle -m PyUnpicklerTests
Running Debug|x64 interpreter...
0:00:00 Run tests sequentially
0:00:00 [1/1] test_pickle
beginning 6 repetitions
123456
......
test_pickle leaked [4, 4, 4] references, sum=12
test_pickle leaked [4, 4, 4] memory blocks, sum=12
test_pickle failed (reference leak)

== Tests result: FAILURE ==

1 test failed:
    test_pickle

Total duration: 908 ms
Tests result: FAILURE

  4. Eclips4 commented on May 21, 2023

    @Eclips4
    Eclips4
    on May 21, 2023
    MemberAuthor

    First bad commit: #94504
    Also, I know about some refleaks in test_import. (#102251)
    What is the relationship with this issue and test_import issue?
    Seems that both introduced in #94504 PR.

  5. sunmy2019 commented on May 21, 2023

    @sunmy2019
    sunmy2019
    on May 21, 2023
    Member

    Seems all ref leaks come from test_unpickle_module_race

    If this test is removed from AbstractUnpickleTests, all ref leaks are gone.

  6. vstinner
    added a commit that references this issue on Aug 29, 2023

    GH-106176, GH-104702: Fix reference leak when importing across multip…

    5f85b44
  7. miss-islington
    added a commit that references this issue on Aug 29, 2023

    pythonGH-106176, pythonGH-104702: Fix reference leak when importing a…

    d2f0afd
  8. Yhg1s
    added a commit that references this issue on Aug 29, 2023

    [3.12] GH-106176, GH-104702: Fix reference leak when importing across…

    c942fae
  9. Eclips4
    closed this as completedon Aug 29, 2023
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