Stack or heap?

[Andrew Starks <andrew.starks@...>]

msg = function(a, b, c)

  return function()

    return a, b, c

  end

end

Let's say that I call this a bunch of times, sending it as a "message" to another function, which may store them in a cue, for later processing. 

Are the instances of "a, b, c" on the heap (garbage collected) or in the stack?

This may be a dumb question. I apologize if it is. 

-Andrew