List halp

My lisp code doesn't seem to work:

(defun apply-screen-next (game)
  (with-slots (game-screen game-screen-next) game
    (when game-screen (unsubscribe game game-screen))
    (setf game-screen game-screen-next)
    (when game-screen (goto game-screen))))

>>7
also back to the imageboards.
So you respond to an obvious troll just to reiterate that failure of a meme? I think it is rather you who should fuck off of /prog/.