[BUG] `_super` within RSVP callback doesn't reference the correct method

[dandehavilland]

I couldn't find anything about whether this behaviour is intended, but it certainly feels like a bug to me.

These are the basics:

// assuming the object as at least one `Mixin` or parent
myMethod: function() {
  RSVP.resolve().then(() => {
    this._super.apply(this, arguments);
    // this._super === ROOT();
  });
  this._super.apply(this, arguments);
  // this._super === superWrapper()
}

Twiddle here

Workaround:

myMethod: function() {
  let correctSuper = this._super;
  RSVP.resolve().then(() => {
    correctSuper.apply(this, arguments);
    // correctSuper === superWrapper();
  });
  this._super.apply(this, arguments);
  // this._super === superWrapper()
}

[stefanpenner]

This is working as expected, _super is a synchronous construct, if you wish to preserve it asynchronously, you must capture and bind it.