From: Vitaly Lugovsky <vsl@ontil.ihep.su>
>  I just got a strange error message, never seen before.
> Ocaml 3.06.
> 
> The implementation lisp.ml does not match the interface lisp.cmi:
> Values do not match:
>   val execute :
>     int * (string, '_a Lispt.ctv) Hashtbl.t ->
>     '_a Lispt.llist list -> int * (string, '_a Lispt.ctv) Hashtbl.t
> is not included in
>   val execute :
>     int * (string, 'a Lispt.ctv) Hashtbl.t ->
>     'a Lispt.llist list -> int * (string, 'a Lispt.ctv) Hashtbl.t

That's just the nth variant of the value polymorphism problem.  You
should probably eta-expand the definition of execute, because
currently it has a monorphic type (as shown by the '_a), while the
interface requires it to be polymorphic.

---------------------------------------------------------------------------
Jacques Garrigue      Kyoto University     garrigue at kurims.kyoto-u.ac.jp
		<A HREF=http://wwwfun.kurims.kyoto-u.ac.jp/~garrigue/>JG</A>
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