1  /* { dg-do compile } */
       2  /* { dg-options "-O" } */
       3  
       4  struct S
       5  {
       6    int i;
       7  };
       8  
       9  int invalid[] = 0; /* { dg-error "invalid initializer" } */
      10  
      11  void foo (void)
      12  {
      13    if (((struct S *)undeclared)->i); /* { dg-error "undeclared" } */
      14    /* { dg-message "reported only once" "" { target *-*-* } .-1 } */
      15  }
      16