1  /* PR middle-end/101172 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O2" } */
       4  
       5  union U
       6  {
       7    int a[3];
       8    struct
       9    {
      10      int a : 3;
      11      struct this_struct var;	/* { dg-error "field 'var' has incomplete type" } */
      12    } b;
      13  };
      14  
      15  const union U hello = {.a = {1, 2, 3}};
      16  
      17  void foo()
      18  {
      19    int x = hello.b.a;
      20  }