Bug found in nightbuilds

[Niels Möller]

Torbjorn Granlund <tg at gmplib.org> writes:

> I traced it to a nn=0 call to the underlying pi1 call.  Dunno if that's
> problematic.

I'd expect it is. At least both implementations in div_qr_1n_pi1.c have
an ASSERT (n > 0), and the code also looks like it's *not* handling n ==
0 in a sane way.

Maybe it can be reproduced with an --disable-assembly --enable-assert
build on other machines (possibly depending also on
UDIV_NEEDS_NORMALIZATION).

Regards,
/Niels

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