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      1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
      2 #include "test.h"
      3 
      4 void *Thread(void *a) {
      5   barrier_wait(&barrier);
      6   __atomic_fetch_add((int*)a, 1, __ATOMIC_SEQ_CST);
      7   return 0;
      8 }
      9 
     10 int main() {
     11   barrier_init(&barrier, 2);
     12   int *a = new int(0);
     13   pthread_t t;
     14   pthread_create(&t, 0, Thread, a);
     15   delete a;
     16   barrier_wait(&barrier);
     17   pthread_join(t, 0);
     18 }
     19 
     20 // CHECK: WARNING: ThreadSanitizer: heap-use-after-free
     21