1  /* { dg-do compile } */
       2  
       3  struct T;
       4  
       5  struct S {
       6    void (*bar)(struct S);
       7  };
       8  
       9  void bar(struct T t) {} /* { dg-error "" }  */
      10  
      11  void foo(struct S *s)
      12  {
      13    s->bar = bar;
      14  }
      15