gistfile1.js

   // binds to. Override this method to prevent the initial
    // events, or to add your own initial events.
    _initialEvents: function(){
 -    if (this.collection){
 -      this.listenTo(this.collection, "add", this.addChildView, this);
 -      this.listenTo(this.collection, "remove", this.removeItemView, this);
 -      this.listenTo(this.collection, "reset", this._renderChildren, this);
 -    }
 +
 +    // Bind only after composite view in rendered to avoid adding child views
 +    // to unexisting itemViewContainer
 +    this.once('render', function () {
 +      if (this.collection){
 +        this.listenTo(this.collection, "add", this.addChildView, this);
 +        this.listenTo(this.collection, "remove", this.removeItemView, this);
 +        this.listenTo(this.collection, "reset", this._renderChildren, this);
 +      }
 +    });
 +