Hello dear camlers,

I just noticed that in 4.12+effect, in the road to multicore, we have now the
nice exception:

  Failure("Serializing closures is broken in multicore")

This is a bit a pity: if you want to use both multicore and multi-machine
parallelism, then, marshalling closures was useful for communication between
machines in some cases. Is it a final decision or serialization of closures will
be lost forever in OCaml ?

Remark: Closures is not marked as obsolete in Marshal.mli

Cheers,
Christophe