*** old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/nodes/type/MetaspacePointerStamp.java	Mon Mar 20 17:38:48 2017
--- new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/nodes/type/MetaspacePointerStamp.java	Mon Mar 20 17:38:48 2017

*** 58,67 ****
--- 58,72 ----
      public boolean hasValues() {
          return true;
      }
  
      @Override
+     public Stamp join(Stamp other) {
+         return defaultPointerJoin(other);
+     }
+ 
+     @Override
      public ResolvedJavaType javaType(MetaAccessProvider metaAccess) {
          throw GraalError.shouldNotReachHere("metaspace pointer has no Java type");
      }
  
      protected void appendString(StringBuilder str) {