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8276540: Howl Full CardSet container iteration marks too many cards #6229

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@@ -330,7 +330,7 @@ inline void G1CardSetHowl::iterate_cardset(CardSetPtr const card_set, uint index
if (found.start_iterate(G1GCPhaseTimes::MergeRSHowlFull)) {
assert(card_set == G1CardSet::FullCardSet, "Must be");
uint offset = index << config->log2_num_cards_in_howl_bitmap();
for (uint i = 0; i < config->max_cards_in_region(); i++) {
for (uint i = 0; i < config->num_cards_in_howl_bitmap(); i++) {
found((offset | (uint)i));