Changes to how arguments work, now if you use something like

p.then(function(p) {
  p.next(1,2,3);
})

You can resolve the arguments as follows:

p.then(function(p) {
  p.next(1,2,3);
}).then(function(p, a, b, c) {
  console.log(a);
  console.log(b);
  console.log(c);
  p.next();
}).run();
small missing item.