1  main ()
       2  {
       3    struct  {
       4      signed int s:3;
       5      unsigned int u:3;
       6      int i:3;
       7    } x = {-1, -1, -1};
       8  
       9    if (x.u != 7)
      10      abort ();
      11    if (x.s != - 1)
      12      abort ();
      13  
      14    if (x.i != -1 && x.i != 7)
      15      abort ();
      16  
      17    exit (0);
      18  }