1  struct a {
       2      char b[100];
       3  };
       4  int foo(struct a *a)
       5  {
       6    if (&a->b)
       7      return 1;
       8    return 0;
       9  }
      10  extern void abort (void);
      11  int main()
      12  {
      13    if (foo((struct a *)0) != 0)
      14      abort ();
      15    return 0;
      16  }