enumerator_block_call  490 enumerator.c       return enumerator_block_call(obj, 0, obj);
enumerator_block_call  538 enumerator.c       return enumerator_block_call(obj, enumerator_with_index_i, (VALUE)MEMO_NEW(memo, 0, 0));
enumerator_block_call  599 enumerator.c       enumerator_block_call(obj, enumerator_with_object_i, memo);