[lhorie]

Having taken a closer look, it looks like the problems go even deeper than that: it rewrites `l()` calls in functions through a regex/replace on `fn.toString()`. This is similar to the mechanism that broke shorthand Angular.js DI in production. So code can break if it goes through some bundler than renames the `l` variable, or if a minifier does it, etc.

I'd imagine closures also break.

[pygy_]

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).