// indendent invocations of same closure
// should each get their own scope for that instantiation
(defn newClosure [] (letseq [a 1
                           f (fn [addme] (set a (+ a addme)) (printf "a is now %v\n" a) a)] f))
(def g (newClosure))
(def h (newClosure))
(assert (== (g 1) 2))
// if they are mistakenly sharing the same closure variables.
// then the increment on g will have impacted h as well.
(assert (== (h 1) 2))