Bug#1020436: giac failed tests with new pari

[Ileana Dumitrescu]

Hi Tobias,

> are you aware of the bug
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1020436

> Bill posted a suggestion how to fix this test there yesterday.

Yes I saw the bug and initial comments by Bill but thanks for letting me know about Bill's latest comments.

I applied the patch from sagemath (define-anyarg.patch) and built giac 1.9.0.21+dfsg2 in my pbuilder environment and was able to reproduce the chk_fhan4 seg fault from above. I added an additional patch (increase-pari-size.patch) to export PARI_SIZE=2048000 in chk_fhan4 as in Gonzalo Tornaria's comment here: https://trac.sagemath.org/ticket/34583. This allowed the build to complete without error on my pbuilder environment and I committed the changes to salsa. Please feel free to test and upload if the updates look good.

Ileana
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