Re: The removal of function environments: An opportunity for optimization?

[Roberto Ierusalimschy <roberto@...>]

> In fact I don't quite understand what _ENV is.
> 
> function f1()
>   return f2()
>     _ENV = {}
>   end
> end
> 
> Would execution of f2 lead to a change in _ENV of f1? If _ENV is a
> regular upvalue that may be shared, then it would.

_ENV is a regular variable (and so a regular upvalue that may be
shared). Then it does.

-- Roberto