I don't know why, but it seems that load_module decreases the refcount of the sv_name argument (at least it does for me with perl 5.8.8/linux). 

    SV *sv_name = newSVpv("Carp", 0);
    warn("refbefore %d",SvREFCNT(sv_name));
    load_module(PERL_LOADMOD_NOIMPORT, sv_name, Nullsv);
    warn("refafter %d",SvREFCNT(sv_name));

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output: 
refbefore 1 at ....
refafter 0 at  ....

[download]
"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: perlembed: reference counts by Joost
in thread perlembed: reference counts by semuel

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