;;; all functions in the tail set to be equivalent, this amounts to
;;; bringing the entire tail set up to date. We iterate over the
;;; returns for all the functions in the tail set, reanalyzing them
;;; all functions in the tail set to be equivalent, this amounts to
;;; bringing the entire tail set up to date. We iterate over the
;;; returns for all the functions in the tail set, reanalyzing them