1  extern void abort (void);
       2  
       3  int f(unsigned int x, int n)
       4  {
       5      return ((int)x) / (1 << n);
       6  }
       7  
       8  int main()
       9  {
      10    if (f(-1, 1) != 0)
      11      abort ();
      12    return 0;
      13  }