1  /* { dg-do compile } */
       2  
       3  int isdigit (int);
       4  
       5  int
       6  foo (const char *s)
       7  {
       8    int success = 1;
       9    const char *p = s + 2;
      10    if (!isdigit (*p))
      11      success = 0;
      12    while (isdigit (*p))
      13      ++p;
      14    return success;
      15  }