--- old/src/share/vm/opto/callnode.cpp	2017-07-06 17:28:21.051443786 +0200
+++ new/src/share/vm/opto/callnode.cpp	2017-07-06 17:28:17.020461885 +0200
@@ -1177,6 +1177,9 @@
           set_req(i, in_oop);
           progress = true;
         }
+      } else if (arg->Opcode() == Op_ValueTypePtr) {
+        ValueTypePtrNode* vtptr = (ValueTypePtrNode*)arg;
+        vtptr->make_scalar_in_safepoint(this, phase->C->root(), phase);        
       }
     }
     if (progress) {