Applied mixins do not define the __nextSuper property correctly

[mixonic]

See jsbin.

var item = { foo: 'bar' }
var array = [item];
var MyArrayMixin = Ember.Mixin.create({
  contains: function(){
    return this._super();
  }
});

MyArrayMixin.apply(array);

// Should be true, false is false, false
console.log(
  array.hasOwnProperty('__nextSuper'),
  array.propertyIsEnumerable('__nextSuper')
);

array.contains();

// Should be true, false is true, true
console.log(
  array.hasOwnProperty('__nextSuper'),
  array.propertyIsEnumerable('__nextSuper')
);

Currently __nextSuper is defined in the makeCtor function, which is only called when creating a new object. Array are really just mixins applied to array instance, and as such never call the constructor. __nextSuper should be set on them during instantiation with the correct non-enumerable configuration.

Is similar to #4970, but this is for the general case. That specific issue on contains was addressed by #5444.

Could be addressed by #5430. May ref #5464

[wagenet]

@mixonic any updates here?

[mixonic]

No, sadly. I would like to keep tracking this though.

[rwjblue]

Closed by #12062.