Set<Integer> mt = emptySet();
    assertEmpty(cartesianProduct(mt, mt));
  }

  public void testCartesianProduct_binary0x1() {
    Set<Integer> mt = emptySet();
    assertEmpty(cartesianProduct(mt, set(1)));
  }

  public void testCartesianProduct_binary1x0() {
    Set<Integer> mt = emptySet();
    assertEmpty(cartesianProduct(set(1), mt));
  }

et?jol?l&a&g?iciffo,s??im?ut??m&da?oc?se??n&gd?if?o&m?rga???o&csid?fni?i&r?u??rp??pprr?qisp?r&ab?bi?tn?ut??t&al?e&n?v??n&ed?o&c?do???of?qra?ra??ude?vog?xxx??beuq?n?smoc??fdh?i&lohtac?n&agro?ilc?osanap??sum?tic??l!.&gro?moc?oc?ten?ude?vog?yo,?l??m!.&mt?ossa??p1akcq--nx??n!.&mon?ossa??i?p??relcel?s!.&gro?moc?ten?ude?vog???t!s?w??v!.&gro?lim?moc?sndym,ten?ude?v&g:.d,,og????wp?yn??d&2urzc--nx?3&1wrpk--nx?c&4b11--nx?9jrcpf--nx???5xq55--nx?697uto--nx?75yrpk--nx?9ctdvkce--nx?a!d?er?olnwod??b2babgm--nx?...

	tags["pool"] = strconv.Itoa(er.poolIndex)
	tags["merrs"] = joinErrs(errs)
	tags["derrs"] = fmt.Sprintf("%v", dataErrsByPart)
	if m.IsValid() {
		tags["sz"] = strconv.FormatInt(m.Size, 10)
		tags["mt"] = m.ModTime.Format(iso8601Format)
		tags["d:p"] = fmt.Sprintf("%d:%d", m.Erasure.DataBlocks, m.Erasure.ParityBlocks)
	} else {
		tags["invalid"] = "1"