;; A Vec's elements are in a block the allocator owns and the frame does not,
;; so a function value pushed into one outlives whatever environment it
;; carries. Refused for that, and not for the shape of the element type: a Vec
;; of function values is a perfectly good thing to want, and is what case 3
;; is for.
(defn stash [v (Vec (Fn [] i32))  f (Fn [] i32)] ()
  (push v f))

(defn main [] i32 0)