1  /* PR c/50179 */
       2  /* { dg-options "-Wunused" } */
       3  /* { dg-do compile } */
       4  
       5  void bar (int, ...);
       6  
       7  char *
       8  foo (void)
       9  {
      10    bar (1, (__extension__ ({ static char b[2]; b[0] = 1; b; })));
      11    bar (1, ({ static char c[2]; c[0] = 1; c; }));
      12    return ({ static char d[2]; d[0] = 1; d; });
      13  }