(with-default-error-location (location)
(let* ((slot (find-instance-slot-by-name class nick name))
(initarg-name (get-property pset :initarg :id))
(with-default-error-location (location)
(let* ((slot (find-instance-slot-by-name class nick name))
(initarg-name (get-property pset :initarg :id))