--- old/src/hotspot/share/gc/g1/heapRegion.cpp	2019-11-19 15:51:08.197012721 +0100
+++ new/src/hotspot/share/gc/g1/heapRegion.cpp	2019-11-19 15:51:07.989011429 +0100
@@ -258,7 +258,7 @@
   _prev_top_at_mark_start(NULL), _next_top_at_mark_start(NULL),
   _prev_marked_bytes(0), _next_marked_bytes(0),
   _young_index_in_cset(-1),
-  _surv_rate_group(NULL), _age_index(-1), _gc_efficiency(0.0),
+  _surv_rate_group(NULL), _age_index(SurvRateGroup::InvalidAgeIndex), _gc_efficiency(0.0),
   _recorded_rs_length(0), _predicted_elapsed_time_ms(0),
   _node_index(G1NUMA::UnknownNodeIndex)
 {