Chart crashes if I setLabelsVisible(false):

Caused by: java.lang.NullPointerException
at javafx.scene.chart.PieChart.layoutChartChildren(PieChart.java:548)
at javafx.scene.chart.Chart$1.layoutChildren(Chart.java:84)



import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.collections.FXCollections;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Node;
import javafx.scene.chart.PieChart;
import javafx.util.Duration;

/**
 * An advanced pie chart with a variety of actions and settable properties.
 *
 * @see javafx.scene.chart.PieChart
 * @see javafx.scene.chart.Chart
 */
public class TestApp3 extends Application {
    private int itemNameIndex = 1;

    private void init(Stage primaryStage) {
        Group root = new Group();
        primaryStage.setScene(new Scene(root));
        root.getChildren().add(createChart());
    }

    protected PieChart createChart() {
        final PieChart pc = new PieChart(FXCollections.observableArrayList(
            new PieChart.Data("Sun", 20),
            new PieChart.Data("IBM", 12),
            new PieChart.Data("HP", 25),
            new PieChart.Data("Dell", 22),
            new PieChart.Data("Apple", 30)
        ));
        pc.setLabelsVisible(false);
        // setup chart
        pc.setId("BasicPie");
        pc.setTitle("Pie Chart Example");
        return pc;
    }

    @Override public void start(Stage primaryStage) throws Exception {
        init(primaryStage);
        primaryStage.show();
    }
    public static void main(String[] args) { launch(args); }
}