src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.phases/src/org/graalvm/compiler/phases/BasePhase.java

@@ -256,22 +256,22 @@
             return listener.changed;
         }
         return false;
     }
 
-    private final class GraphChangeListener implements NodeEventListener {
+    private final class GraphChangeListener extends NodeEventListener {
         boolean changed;
         private StructuredGraph graph;
         private Mark mark;
 
         GraphChangeListener(StructuredGraph graphCopy) {
             this.graph = graphCopy;
             this.mark = graph.getMark();
         }
 
         @Override
-        public void event(NodeEvent e, Node node) {
+        public void changed(NodeEvent e, Node node) {
             if (!graph.isNew(mark, node) && node.isAlive()) {
                 if (e == NodeEvent.INPUT_CHANGED || e == NodeEvent.ZERO_USAGES) {
                     changed = true;
                 }
             }