--- old/src/share/vm/gc/g1/heapRegion.cpp	2017-02-20 14:11:01.550330569 +0100
+++ new/src/share/vm/gc/g1/heapRegion.cpp	2017-02-20 14:11:01.418329915 +0100
@@ -267,6 +267,8 @@
   report_region_type_change(G1HeapRegionTraceType::ContinuesHumongous);
   _type.set_continues_humongous();
   _humongous_start_region = first_hr;
+
+  _bot_part.set_continues_humongous(true);
 }
 
 void HeapRegion::clear_humongous() {
@@ -274,6 +276,8 @@
 
   assert(capacity() == HeapRegion::GrainBytes, "pre-condition");
   _humongous_start_region = NULL;
+
+  _bot_part.set_continues_humongous(false);
 }
 
 HeapRegion::HeapRegion(uint hrm_index,