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// RUN: %clang_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s #include <pthread.h> int Global; void *Thread1(void *x) { Global = 42; return x; } int main() { pthread_t t; pthread_create(&t, NULL, Thread1, NULL); Global = 43; pthread_join(t, NULL); return Global; } // CHECK: WARNING: ThreadSanitizer: data race