(defun find-attribute (description attribute-name &optional (errorp t))
(or (find attribute-name (description-attributes description)
:key #'attribute-name)
- (when errorp (error "No attribute named ~A found in ~A" attribute-name description))))
+ (when errorp (error "No attribute named ~A found in ~A describing ~A" attribute-name description (described-object description)))))
(define-layered-function description-active-descriptions (description)
(:method ((description standard-description-object))