--- old/src/hotspot/share/gc/g1/g1RemSet.cpp	2018-04-04 14:39:29.990914158 +0200
+++ new/src/hotspot/share/gc/g1/g1RemSet.cpp	2018-04-04 14:39:29.685904827 +0200
@@ -937,9 +937,9 @@
       DEBUG_ONLY(HeapWord* const top_at_rebuild_start = _cm->top_at_rebuild_start(region_idx);)
       assert(top_at_rebuild_start == NULL ||
              total_marked_bytes == hr->marked_bytes(),
-             "Marked bytes " SIZE_FORMAT " for region %u (%s) in [bottom, TAMS) do not match liveness during mark " SIZE_FORMAT " "
+             "Marked bytes " SIZE_FORMAT " for region %u (%s) in [bottom, TAMS) do not match calculated marked bytes " SIZE_FORMAT " "
              "(" PTR_FORMAT " " PTR_FORMAT " " PTR_FORMAT ")",
-             total_marked_bytes, hr->hrm_index(), hr->get_type_str(), _cm->liveness(region_idx) * HeapWordSize,
+             total_marked_bytes, hr->hrm_index(), hr->get_type_str(), hr->marked_bytes(),
              p2i(hr->bottom()), p2i(top_at_mark_start), p2i(top_at_rebuild_start));
        // Abort state may have changed after the yield check.
       return _cm->has_aborted();