--- old/src/share/vm/opto/library_call.cpp	2016-06-29 15:34:14.000000000 +0300
+++ new/src/share/vm/opto/library_call.cpp	2016-06-29 15:34:14.000000000 +0300
@@ -2424,6 +2424,8 @@
       return false;
     }
     mismatched = (bt != type);
+  } else if (alias_type->adr_type() == TypeOopPtr::BOTTOM) {
+    mismatched = true; // conservatively mark all "wide" on-heap accesses as mismatched
   }
 
   // First guess at the value type.