about getter/setter #9078

Room.prototype.mainChannel = { get:function () { return this._mainChannel; }, set:function(value){ this._mainChannel = value; } }

it's working all right.but another not:

Player.prototype.user = { get:function () { return this._user; }, set:function (value) { this._user = value } }

Here is result when I print "player.user":

I don't konw why.Who can tell me why?Thank you!