Hi all,

We are trying to augment caml's type system for checking the
well-foundedness of recursive module definitions. We are about to
finish a first prototype version of our system.

We thus would be very grateful for tricky examples of valid programs
using recursive modules, as well as tricky examples of invalid ones.

Please, do not send huge programs, nor programs using objects, as our
prototype does not yet handle them.

Thanks in advance!