1  int
       2  main ()
       3  {
       4    int a[10], b;
       5    for (b = 6; b >= 3; b--)
       6      {
       7        a[b] = 1;
       8        a[b + 2] = a[3];
       9      }
      10    if (a[5] != 1)
      11      __builtin_abort ();
      12    return 0;
      13  }