1  /* { dg-do compile } */
       2  /* { dg-options "-O0 -Wuninitialized" } */
       3  
       4  int main(int argc, char **argv)
       5  {
       6    int a;
       7    for(; a < 5; ++a) /* { dg-warning "is used uninitialized" } */
       8      ;
       9    return  0;
      10  }