--- old/src/hotspot/share/gc/z/zMarkStackEntry.hpp	2019-03-14 17:07:39.270739616 +0000
+++ new/src/hotspot/share/gc/z/zMarkStackEntry.hpp	2019-03-14 17:07:38.834735033 +0000
@@ -69,7 +69,7 @@
 private:
   typedef ZBitField<uint64_t, bool,      0,  1>  field_finalizable;
   typedef ZBitField<uint64_t, bool,      1,  1>  field_partial_array;
-  typedef ZBitField<uint64_t, uintptr_t, 2,  62> field_object_address;
+  typedef ZBitField<uint64_t, uintptr_t, 2,  62, 2> field_object_address;
   typedef ZBitField<uint64_t, size_t,    2,  30> field_partial_array_length;
   typedef ZBitField<uint64_t, size_t,    32, 32> field_partial_array_offset;