syphilis, I was expecting your call. Thanks.

You saw that correctly. And the culprit, as per advice from LeoNerd at https://kiwiirc.com/nextclient/#irc://irc.perl.org/#perl (23/07/2021 @ 10:50 server time) is in the filling part: av_push(av, (SV *)av2); should become av_push(av, newRV_noinc((SV *)av2)); . And sv_setsv() should be sv_setrv()

Which is non-existent but LeoNerd posted this:

/************************************************************/

/* Monkeypath by LeoNerd to set an arrayref into a scalarref
   As posted on https://kiwiirc.com/nextclient/#irc://irc.perl.org/#pe
+rl
   at 10:50 23/07/2021
   A BIG THANK YOU LeoNerd
*/

#define HAVE_PERL_VERSION(R, V, S) \
    (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (
+V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))

#define sv_setrv(s, r)  S_sv_setrv(aTHX_ s, r)
static void S_sv_setrv(pTHX_ SV *sv, SV *rv)
{
  sv_setiv(sv, (IV)rv);
#if !HAVE_PERL_VERSION(5, 24, 0)
  SvIOK_off(sv);
#endif
  SvROK_on(sv);
}
/************************************************************/

[download]

I am posting the full working script as a comment to my question.

bw, bliako

In reply to Re^2: Inline::C : passing parameters to functions, modifying by reference by bliako
in thread Inline::C : passing parameters to functions, modifying by reference by bliako

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