1  
       2  /* { dg-options "-O2 -std=gnu99" } */
       3  /* Internal compiler error in iterative_hash_expr */
       4  
       5  struct tree_string
       6  {
       7    char str[1];
       8  };
       9  
      10  union tree_node
      11  {
      12    struct tree_string string;
      13  };
      14  
      15  char *Foo (union tree_node * num_string)
      16  {
      17    char *str = ((union {const char * _q; char * _nq;})
      18  	       ((const char *)(({ __typeof (num_string) const __t
      19  				     = num_string;  __t; })
      20  			       ->string.str)))._nq;
      21    return str;
      22  }