;;; this file:
;;;   http://user.it.uu.se/~embe8573/emacs-init/geh-dyn.el
;;;   https://dataswamp.org/~incal/emacs-init/geh-dyn.el

(require 'cl-lib)

(defun *a10 ()
  (* a 2) )

(defun mult ()
  (lexical-let ((a 10))
    (*a10) ))

;; (mult) ; *a10: Symbol’s value as variable is void: a