--- old/src/share/vm/gc/g1/heapRegion.inline.hpp	2015-11-05 13:45:02.326433458 +0100
+++ new/src/share/vm/gc/g1/heapRegion.inline.hpp	2015-11-05 13:45:02.242433041 +0100
@@ -117,14 +117,8 @@
   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 
   if (!this->is_in(p)) {
-    HeapRegion* hr = g1h->heap_region_containing(p);
-#ifdef ASSERT
-    assert(hr->is_humongous(), "This case can only happen for humongous regions");
-    oop obj = oop(hr->humongous_start_region()->bottom());
-    assert((HeapWord*)obj <= p, "p must be in humongous object");
-    assert(p <= (HeapWord*)obj + obj->size(), "p must be in humongous object");
-#endif
-    return hr->block_is_obj(p);
+    assert(is_continues_humongous(), "This case can only happen for humongous regions");
+    return (p == humongous_start_region()->bottom());
   }
   if (ClassUnloadingWithConcurrentMark) {
     return !g1h->is_obj_dead(oop(p), this);