> > (disassemble (eval '(function (lambda (x y) (cons x y)))))

After installing jad (I could not find it before, thank you for the link) this form produces disassembly.
 
But the form
 
(disassemble '(lambda (x y) (cons y x)))     (see disassemble.3)
 
returns
 
; Disassembly is not available.
NIL

with or without jad.
 
Why inconsistency?
 
Regarding javap one could check what's available: jad -> javap -> <warning>

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