+ ;; KLUDGE: during the build process with SB-SHOW, we can sometimes
+ ;; attempt to print out a PCL object (with null LAYOUT-INFO).
+ #!+sb-show
+ (when (null dd)
+ (pprint-logical-block (stream nil :prefix "#<" :suffix ">")
+ (prin1 name stream)
+ (write-char #\space stream)
+ (write-string "(no LAYOUT-INFO)"))
+ (return-from %default-structure-pretty-print nil))