On Thu, 21 Mar 2002, Vesa Karvonen wrote:
>
> The following program raises an Out_of_memory exception. Is this:
> - correct behavior,
> - bug in Ocaml 3.04, or
> - bug somewhere else?

I would say "correct behavior"; the manual says, about generic
comparisons:

     Comparison between cyclic structures may not terminate.


Note that it would be costly to implement exact (structural) comparison of
cyclic structures (with a coinductive definition). What you want is
probably to test for physical equality; you can use the functorial version
of hash tables to do that.

-- Alain

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