Error when there is a 'currentState' property on a component

[gethinwebster]

In Ember 1.13.0-beta.2, having a component with both a currentState property and an init method with a call to this.set on any property causes the following error:

Uncaught TypeError: this.currentState.legacyPropertyDidChange is not a function

See: http://jsfiddle.net/as72hpe0/, extract:

App.MyComponentComponent = Ember.Component.extend({
    foo: 'bar',
    currentState: 'myOwnProperty',
    init: function(){
        this.set('foo', 'something');
        this._super();
    }
});

In the documentation, currentState is not specified as being a private property of Ember.Component, but it appears that it's being used as such internally.

Code ref:

ember.js/packages/ember-views/lib/compat/attrs-proxy.js

Line 119 in a3fad34

if (this.currentState) {

[rwjblue]

Sadly, this was missed during the work for Ember 2.0.0. I updated the internals in #12163 to move the reserved word to ._currentState, and flagged the .currentState deprecation to be removed in 2.3.0 (after the next LTS release).