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  1. (handler-case
  2. (compile nil
  3. '(lambda (x) (+ (reduce '+ x) x)))
  4. (warning (w) (format t "~a" w)))
Success #stdin #stdout #stderr 0.02s 30308KB
stdin
Standard input is empty
stdout
Derived type of X is
  (VALUES SEQUENCE &OPTIONAL),
conflicting with its asserted type
  NUMBER.
See also:
  The SBCL Manual, Node "Handling of Types"
stderr
; in: LAMBDA (X)
;     (+ (REDUCE '+ X) X)
; 
; note: deleting unreachable code
; 
; compilation unit finished
;   caught 1 fatal ERROR condition
;   printed 1 note