--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.common/src/org/graalvm/compiler/core/common/type/PrimitiveStamp.java	Tue Mar 12 12:12:01 2019 -0700
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.common/src/org/graalvm/compiler/core/common/type/PrimitiveStamp.java	Tue Mar 12 19:17:42 2019 +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.
      */