(defstruct box
(word 0 :type sb-vm:word))
+;; Have the following tests check that CAS access to the superclass
+;; works in the presence of a subclass sharing the conc-name.
+(defstruct (subbox (:include box) (:conc-name "BOX-")))
+
(defun inc-box (box n)
(declare (fixnum n) (box box))
(loop repeat n