1  /* { dg-do compile } */
       2  
       3  typedef union tree_node *tree;
       4  struct tree_base {
       5    unsigned : 1;
       6    unsigned lang_flag_2 : 1;
       7  };
       8  struct tree_type {
       9    tree main_variant;
      10  };
      11  union tree_node {
      12    struct tree_base base;
      13    struct tree_type type;
      14  };
      15  tree finish_struct_t, finish_struct_x;
      16  void finish_struct()
      17  {
      18    for (; finish_struct_t->type.main_variant;)
      19      finish_struct_x->base.lang_flag_2 = 0;
      20  }