  func f() {
    var a = 2;
    var b = 2;
    if (NR > 5) {
      var a = 3;
      b = 3;
    }
    return 1000 * a + b;
  }
  a = 1;
  b = 1;
  $ab = f();
  $oa = a;
  $ob = b;
 
