--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/PhiNode.java	Fri Dec 01 14:19:16 2017 -0500
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/PhiNode.java	Fri Dec 01 11:17:45 2017 -0800
@@ -152,7 +152,7 @@
 
     public void addInput(ValueNode x) {
         assert !(x instanceof ValuePhiNode) || ((ValuePhiNode) x).merge() instanceof LoopBeginNode || ((ValuePhiNode) x).merge() != this.merge();
-        assert !(this instanceof ValuePhiNode) || x.stamp().isCompatible(stamp());
+        assert !(this instanceof ValuePhiNode) || x.stamp(NodeView.DEFAULT).isCompatible(stamp(NodeView.DEFAULT));
         values().add(x);
     }