Simon,
Yes, it's quite deliberate. See 5.4 of
http://research.microsoft.com/%7Esimonpj/papers/gadt/gadt-icfp.pdf
The alternative design choice is to reject both programs, but in
Haskell
(because of laziness) the evaluation order is prescribed, so accepting
the former seems right.
Yes, I've read it now and your point is clear. Thank you.
Regards,
Stefan
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