src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/nodes/type/KlassPointerStamp.java

*** 70,79 ****
--- 70,86 ----
          super(nonNull, alwaysNull);
          this.encoding = encoding;
      }
  
      @Override
+     public void accept(Visitor v) {
+         super.accept(v);
+         v.visitLong(encoding.getBase());
+         v.visitInt(encoding.getShift());
+     }
+ 
+     @Override
      protected AbstractPointerStamp copyWith(boolean newNonNull, boolean newAlwaysNull) {
          return new KlassPointerStamp(newNonNull, newAlwaysNull, encoding);
      }
  
      @Override