Closures will break, yes. It looks like it is intended to react to mutations to the properties of `this`... I hadn't thought of minification, yes it pretty bad

Closures will break, yes. It looks like it is intended to react to mutations to the properties of `this`... I hadn't thought of minification, yes it pretty bad :-/... It looks like the author is smart but has little JS experience (`var last = temp.splice(-1)[0]` where `temp.pop()` would do tells me that it may be one of his first JS project).