new Breaks Factory Objects

new-sucks.js

// Create a factory object that can be used to swap out the prototype used
// to instantiate new instances.

var factory = {};

factory.proto = {foo: 'bar'};

factory.create = function () { return Object.create(this.proto); };

var t1 = factory.create();

t1.foo; // "bar"

var t2 = new factory.create();
// TypeError: Object prototype may only be an Object or null