The following application leaks severely if you active Mnemonic Parsing by selecting button "Mnemonic".
Repeat10 times (Click on button Add, Click on button Remove) to observe the leak.
On 32 bits VM, it runs OutOfMemory in a few clicks.


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package bundlememoryleak;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ToggleButton;
import javafx.scene.control.ToolBar;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/**
 *
 * @author Daniel
 */
public class BundleMemoryLeak extends Application {

    @Override
    public void start(Stage primaryStage) {

        MyController root = new MyController();
        Scene scene = new Scene(root, 600,400);

        primaryStage.setTitle("Hello World!");
        primaryStage.setScene(scene);
        primaryStage.show();

    }

    static public class MyController extends BorderPane {

        FlowPane container = new FlowPane();

        public MyController() {

            Button add = new Button("add");
            Button remove = new Button("remove");
            ToggleButton mnemonic = new ToggleButton("mnemonic");
            setLeft(new ToolBar(add, remove, mnemonic));
            setCenter(container);
            add.setOnAction(new EventHandler<ActionEvent>() {

                @Override
                public void handle(ActionEvent event) {
                    for (int i = 0; i < 1000; i++) {
// MyPane chart = new MyPane(); //PlotFactory.createChartController(declModel, this);
                        container.getChildren().add(new StackPane() {
                            {
                                Button b = new Button("_bla");
                                b.setMnemonicParsing(mnemonic.isSelected());
                                getChildren().add(b);
                            }
                        });

// container.getChildren().add(new Button("_WithMnemonic"));
                    }
                }
            }
            );
            remove.setOnAction(
                    new EventHandler<ActionEvent>() {
                        @Override
                        public void handle(ActionEvent event
                        ) {
                            container.getChildren().clear();
                        }
                    }
            );

        }
    }

    /**
     * The main() method is ignored in correctly deployed JavaFX application.
     * main() serves only as fallback in case the application can not be
     * launched through deployment artifacts, e.g., in IDEs with limited FX
     * support. NetBeans ignores main().
     *
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }

}