[cheald]

That makes plenty of sense to me; when do you ever want to leak a for loop counter to an outer scope?

[satyr]

And when do you ever want to leak local variables to an outer scope? Never.

Not to mention that loop counters are no different than other `var`iables in JS.

[cheald]

You do want to sometimes reference outer scope variables from inner scopes, though. The only difference between a leaked local and a properly referenced global is usage semantics.