If you add `undefined` to the list of primitives, the ["should serialize primitives" test](https://github.com/nanodeath/HydrateJS/blob/master/spec/HydrateSpec.js#L25-26) fails: ``` Javascript it("should serialize primitives", function() { var inputs = [undefined, 3, "foo", ["a", 3, "bar"]] ```
If you add
undefinedto the list of primitives, the "should serialize primitives" test fails: