IV a = SvIV(SvRV(*res));

I think you don't want SvRV() here, as your *res already is an SV* holding a simple integer (returned by av_fetch()), which is what SvIV() wants.  In other words, AFAICT, *res doesn't hold an RV (a Perl reference), so no need to dereference it.

In reply to Re: simple XS by almut
in thread simple XS by spx2

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