On Thu, 29 Jan 2004, Richard Jones wrote:

> I'm pretty sure this bit of the manual is wrong, or at least I've not
> been able to make it work.  I don't have any definite proof of this,
> but my crashes stopped once I started wrapping up pointers in
> Abstract_tag.

One important thing to be aware of when you use "foreign" pointers is
that the Caml GC heap can grow at any time and span over existing
pointers. So you have to be careful to null foreign pointers when you free
the block they're pointing to.

Reference: http://pauillac.inria.fr/~doligez/caml-guts/Fahndrich99.txt

-- Alain

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