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gh-135641: Fix flaky test_capi.test_lock_two_threads test case (gh-135642)

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The mutex may have the `_Py_HAS_PARKED` bit set.
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Sam Gross 2025-06-18 14:24:05 -04:00 • committed by GitHub
parent 46c60e0d0b
commit 17ac3933c3
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5
Modules/_testinternalcapi/test_lock.c
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@ -57,7 +57,10 @@ lock_thread(void *arg)
_Py_atomic_store_int(&test_data->started, 1);
PyMutex_Lock(m);
assert(m->_bits == 1);
// gh-135641: in rare cases the lock may still have `_Py_HAS_PARKED` set
// (m->_bits == 3) due to bucket collisions in the parking lot hash table
// between this mutex and the `test_data.done` event.
assert(m->_bits == 1 || m->_bits == 3);
PyMutex_Unlock(m);
assert(m->_bits == 0);