:destroyed-constant-args (nth-constant-args 1))
(defknown %set-symbol-value (symbol t) t (unsafe))
(defknown (setf symbol-function) (function symbol) function (unsafe))
-(defknown %set-symbol-plist (symbol t) t (unsafe))
+(defknown %set-symbol-plist (symbol list) list (unsafe))
(defknown (setf fdocumentation) ((or string null) t symbol)
(or string null)
())