1  /* { dg-do compile } */
       2  /* { dg-options "-std=gnu89" } */
       3  /* A combine of two extensions to C89 are used here.
       4     First casts to unions is used.
       5     Second subscripting non lvalue arrays, this is in C99. */
       6  
       7  union vx {short f[8]; int v;};
       8  int vec;
       9  
      10  void
      11  foo5 (int vec)
      12  {
      13    ((union vx) vec).f[5] = 1;
      14  }