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test_functools sometimes leaks references #120163
Description
The text below is a part of the refleak tests, and unfortunately, I am unable to constantly reproduce it :(
0:13:26 load avg: 7.84 [201/478/1] test_functools failed (reference leak) -- running (3): test.test_multiprocessing_spawn.test_processes (7 min 14 sec), test_embed (1 min 12 sec), test_faulthandler (55.3 sec)
beginning 6 repetitions. Showing number of leaks (. for 0 or less, X for 10 or more)
123:456
XX1 111
Activity
[-]``test_functools`` leaks references[/-][+]``test_functools`` sometimes leaks references[/+]adiaholic commentedon Jun 6, 2024
I was able to reproduce this:
0:00:00 load avg: 1.70 Run 1 test sequentially in a single process 0:00:00 load avg: 1.70 [1/1] test_functools beginning 6 repetitions. Showing number of leaks (. for 0 or less, X for 10 or more)123:456XX. 3..test_functools leaked [3, 0, 0] memory blocks, sum=3 (this is fine)adiaholic commentedon Jun 7, 2024
@Eclips4, I stumbled upon this which suggests that this scenario might be false positive and an outcome of late initialization and not a real leak. Since it is false positive it is difficult to constantly reproduce it.
If this needs further attention please let me know, I'm happy to look into it more if you suggest so :)
vstinner commentedon Jun 27, 2024
Previous issue: #80741
vstinner commentedon Aug 9, 2024
See also commit 5f660e8: fix for test_typing.