Re: Deprecating setfenv()

[François Perrad <francois.perrad@...>]

In Lua 5.1, setfenv(f, table) & debug.setfenv(object, table) are not
equivalent, debug.setfenv() is a low level function.

In my module lua-Coat (http://github.com/fperrad/lua-Coat/), I use
setfenv with a stack level.
With Lua 5.2, the following code :
    setfenv(3, M)
could be rewrite (and work with Lua 5.1 & Lua 5.2)
    require 'debug'
    ...
    debug.setfenv(debug.getinfo(3, 'f').func, M)

The param 'f' seems optional.
What is the level of stability of the interface of debug.getinfo() ?