gistfile1.js

var w = new function() {
  	this.Jb = 153;
		this.Xh = 178;
		this.lh = 382
	},
	fa = 0;

function ga(a) {
	if("object" != typeof a) return a;
	if(a.hash) return a.hash();
	a.collectionsHash || (a.collectionsHash = "_" + fa++);
	return a.collectionsHash
}
function x(a) {
	this.qa = {};
	this.Nd = 0;
	a != g ? this.vc = a : this.vc = ga
}
s = x.prototype;
s.getData = function() {
	var a = {};
	a.content = this.qa;
	a.size = this.Nd;
	return a
};
s.setData = function(a) {
	this.qa = a.content;
	this.Nd = a.size
};
s.copy = function() {
	var a = new x(this.vc);
	this.forEach(function(b, c) {
		a.put(b, c)
	});
	return a
};

line 10 causes Uncaught TypeError: Cannot read property 'hash' of null