1  /* PR c/69974 */
       2  /* { dg-do compile } */
       3  
       4  struct S;
       5  char foo (struct S *);
       6  struct S a;	/* { dg-error "storage size of 'a' isn't known" } */
       7  int b;
       8  
       9  void
      10  bar ()
      11  {
      12    b &= foo (&a);
      13  }