I was able to reproduce it only after adding (defvar *x* (make-array 20 :element-type NIL)) into room.pure.lisp and increasing the number of pages for print-allocated-objects.
I was able to reproduce it only after adding -objects.
(defvar *x* (make-array 20 :element-type NIL))
into room.pure.lisp
and increasing the number of pages for print-allocated