1  /* PR tree-optimization/78965 */
       2  /* { dg-do run { target c99_runtime } } */
       3  /* { dg-options "-O2" } */
       4  
       5  int
       6  main ()
       7  {
       8    int a = 5, b = 6;
       9    int c = __builtin_snprintf (0, 0, "a%nb%nc", &a, &b);
      10    if (a + b + c != 6)
      11      __builtin_abort ();
      12    return 0;
      13  }