--- old/src/hotspot/share/gc/g1/g1CollectionSet.cpp	2019-11-19 15:50:32.884793744 +0100
+++ new/src/hotspot/share/gc/g1/g1CollectionSet.cpp	2019-11-19 15:50:32.672792431 +0100
@@ -329,7 +329,7 @@
 class G1VerifyYoungAgesClosure : public HeapRegionClosure {
 public:
   bool _valid;
-public:
+
   G1VerifyYoungAgesClosure() : HeapRegionClosure(), _valid(true) { }
 
   virtual bool do_heap_region(HeapRegion* r) {
@@ -340,8 +340,8 @@
       _valid = false;
     }
 
-    if (r->age_in_surv_rate_group() < 0) {
-      log_error(gc, verify)("## encountered negative age in young region");
+    if (!r->has_valid_age_in_surv_rate()) {
+      log_error(gc, verify)("## encountered invalid age in young region");
       _valid = false;
     }