gh-115103: Fix unregistering of QSBR state#116480
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colesbury merged 1 commit intopython:mainfrom Mar 8, 2024
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If a thread blocks while waiting on the
shared->mutexlock, the array of QSBR states may be reallocated. In other words, the value oftstate->qsbrmay be different before and after thePyMutex_Lock()call, and using the previous value across the lock acquisition is not safe.