var func = fun(){
  var ret = 0;
  for (var i = 0; i < 50000; ++i) {
    ret += i;
  } return ret;
}
continue

var fut1 = async(func);
var fut2 = async(func);

// simply executing without crashing is good enough for 
print(" ${fut1.get()}ut1.get()} ${fut2get()} ")
