Stuck in while loop indefinitely about cron-parser HOT 10 CLOSED

var expression = "0 12 * * *"
var cron = require("cron-parser")
var moment = require('moment-timezone');
var currentDate = moment().tz('Europe/Lisbon');

var iterator = cron.parseExpression(expression, {currentDate:currentDate})

for (var i=0; i<40;i++) {
  console.log(iterator.next().toString());
}

'use strict';

const moment = require('moment-timezone');

var m = moment(new Date('Sun Oct 30 2016 02:00:00 GMT+0200'));
console.log(m.toString(), '<-- Just 1 hour before the DST end @ Europe/Madrid');
m.add(1, 'hours');
console.log(m.toString(), '<-- DST end transition @ Europe/Madrid works correctly');
m.startOf('hour');
console.log(m.toString(), '<-- Smthing wrong?? It goes back to the previous hour');

'use strict';

const moment = require('moment-timezone');

var m = moment(new Date('Sun Oct 30 2016 02:00:00 GMT+0200')).tz('Europe/Madrid');
console.log(m.toString(), '<-- Just 1 hour before the DST end @ Europe/Madrid');
m.add(1, 'hours');
console.log(m.toString(), '<-- DST end transition @ Europe/Madrid works correctly');
m.startOf('hour');
console.log(m.toString(), '<-- Everything correct. It remains in the same hour');