Jsb BUG? cc.Menu.create(items)

Cocos2d-x JavaScript
#1 
    var ss = {
        TD: 'td',
        Test: 'test'
    };


    var items = ];
    for(var key in ss){
        var name = ss;
        var item = cc.MenuItemFont.create(key, this.onMenuCallback, this);
        item.name = name;
        items.push(item);
    }
    var menu = cc.Menu.create(items);

最后一行提示 Error: Invalid Native Object

#2

被迫改成这样，正常运行

    var menu = cc.Menu.create();
    for(var key in ss){
        var name = ss;
        var item = cc.MenuItemFont.create(key, this.onMenuCallback, this);
        item.name = name;
        menu.addChild(item);
    }