javascript interface not working with setTimeout about selenium HOT 3 CLOSED

var selenium = require('selenium-webdriver');
var flow = selenium.promise.controlFlow();

var task1 = flow.execute(function() {
  console.log('Inside task 1:\n' + flow);
  return selenium.promise.delayed(10);
}, 'task 1');

setTimeout(function() {
  flow.execute(function() {
    console.log('Inside task 2:\n' + flow);
    return task1;  // Create dependency on task 1 result.
  }, 'task 2');
  console.log('Scheduled task 2:\n' + flow);
}, 0);

flow.once('idle', function() {
  console.log('All done');
});

Inside task 1:
ControlFlow::1
| Frame::4
| | (pending) Task::3<task 1>
| | | (active) Frame::5
Scheduled task 2:
ControlFlow::1
| Frame::4
| | (pending) Task::3<task 1>
| | | (active) Frame::5
| | | | Task::12<task 2>
Inside task 2:
ControlFlow::1
| Frame::4
| | (pending) Task::3<task 1>
| | | Frame::5
| | | | (pending) Task::12<task 2>
| | | | | (active) Frame::13