--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.common/src/org/graalvm/compiler/core/common/type/PrimitiveStamp.java	2019-03-12 08:08:44.663242398 +0100
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.common/src/org/graalvm/compiler/core/common/type/PrimitiveStamp.java	2019-03-12 08:08:44.291239978 +0100
@@ -39,6 +39,11 @@
         this.bits = bits;
     }
 
+    @Override
+    public void accept(Visitor v) {
+        v.visitInt(bits);
+    }
+
     /**
      * The width in bits of the value described by this stamp.
      */