Reproduces JDK-8144162 Exception in thread "JavaFX Application Thread" java.lang.NullPointerException at com.sun.javafx.webkit.theme.ScrollBarThemeImpl.getThumb(ScrollBarThemeImpl.java:409)

JDK8144162.java

package sample;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.concurrent.Worker;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;

public class JDK8144162 extends Application {


  @Override
  public void start(Stage primaryStage) throws Exception {
    WebEngine engine = new WebView().getEngine();
    engine.getLoadWorker().stateProperty().addListener((observable, oldValue, newValue) -> {
      if (Worker.State.SUCCEEDED.equals(newValue)) {
        Platform.runLater(() -> engine.executeScript("window.scrollTo(0, document.documentElement.scrollHeight);"));
      }
    });
    engine.load("http://www.google.com");
  }
}