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test_free_threading.test_dict on TSAN/free-threading is flaky #130519

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colesbury
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interpreter-core(Objects, Python, Grammar, and Parser dirs)testsTests in the Lib/test dirtopic-free-threadingtype-bugAn unexpected behavior, bug, or error
@picnixz

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@picnixz

Bug report

Bug description:

We have:

0:04:15 load avg: 7.63 [20/23/2] test_free_threading worker non-zero exit code (Exit code -6 (SIGABRT)) -- running (2): test_socket (1 min 38 sec), test_threading (38.8 sec)python: Objects/obmalloc.c:1219: void process_queue(struct llist_node *, struct _qsbr_thread_state *, _Bool, delayed_dealloc_cb, void *): Assertion `buf->rd_idx == buf->wr_idx' failed.Fatal Python error: Aborted<Cannot show all threads while the GIL is disabled>Stack (most recent call first):  File "/home/runner/work/cpython/cpython/Lib/test/test_free_threading/test_dict.py", line 184 in writer_func  File "/home/runner/work/cpython/cpython/Lib/threading.py", line 996 in run  File "/home/runner/work/cpython/cpython/Lib/threading.py", line 1054 in _bootstrap_inner  File "/home/runner/work/cpython/cpython/Lib/threading.py", line 1016 in _bootstrapExtension modules: _testinternalcapi, _testcapi (total: 2)

I'm not sure if it's a real bug or not. Victor suggested me to open an issue for this one. Maybe there's already one that exists though.

Seehttps://github.com/python/cpython/actions/runs/13225352402/job/36915529351?pr=129175#step:12:44 for the log (hopefully it will stay).

CPython versions tested on:

CPython main branch

Operating systems tested on:

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interpreter-core(Objects, Python, Grammar, and Parser dirs)testsTests in the Lib/test dirtopic-free-threadingtype-bugAn unexpected behavior, bug, or error

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