Originally, overload would not oven be checked for if
amagic_generation was 0, so it was necessary to do
PL_amagic_generation++, in case this was the first class to have over-
loading. Ever since perl-5.8.0-87-g439cb1c, PL_amagic_generation++
has been unnecessary, since the boot code for version objects incre-
ments it. Furthermore, newXS was already doing PL_sub_generation++
before that, and now does mro_method_changed_in. The code for check-
ing the staleness of the overload tables has always checked
sub_generation (and, later, the stash-specific generation numbers).
print Q(<<"EOF") if ($self->{Overload});
# /* register the overloading (type 'A') magic */
+##if (PERL_REVISION == 5 && PERL_VERSION < 9)
# PL_amagic_generation++;
+##endif
# /* The magic for overload gets a GV* via gv_fetchmeth as */
# /* mentioned above, and looks in the SV* slot of it for */
# /* the "fallback" status. */