+ ;; FIXME: It seems reasonable to display the "in function
+ ;; ~S" information, but doesn't the logic to display it
+ ;; belong in the debugger or someplace like that instead of
+ ;; in the format string for this particular family of
+ ;; conditions? Then this printer might look more
+ ;; ("~@<~S: ~2I~:_~?~:>" (TYPE-OF C) ..) instead.
+ "~@<error in function ~S: ~2I~:_~?~:>"