--- old/src/hotspot/share/gc/g1/heapRegionManager.cpp	2018-10-05 11:10:26.743212500 -0700
+++ new/src/hotspot/share/gc/g1/heapRegionManager.cpp	2018-10-05 11:10:25.846761400 -0700
@@ -513,7 +513,7 @@
 #endif // PRODUCT
 
 HeapRegionClaimer::HeapRegionClaimer(uint n_workers) :
-    _n_workers(n_workers), _n_regions(G1CollectedHeap::heap()->_hrm._allocated_heapregions_length), _claims(NULL) {
+    _n_workers(n_workers), _n_regions(G1CollectedHeap::heap()->_hrm->_allocated_heapregions_length), _claims(NULL) {
   assert(n_workers > 0, "Need at least one worker.");
   uint* new_claims = NEW_C_HEAP_ARRAY(uint, _n_regions, mtGC);
   memset(new_claims, Unclaimed, sizeof(*_claims) * _n_regions);