A DESCRIPTION OF THE PROBLEM :
The method always fails due to throwing hardcoded exception

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Calling TextAreaSkin.dispose() directly, or by calling textArea.setSkin(null or some skin)

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Should never fail
ACTUAL -
Always fails

---------- BEGIN SOURCE ----------

import javafx.application.Application;
import javafx.application.Platform;
import javafx.scene.Scene;
import javafx.scene.control.TextArea;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/** Showcasing javafx bug */
class JavaFxBugTextAreaDispose extends Application {

public static void main(String[] args) {
launch(args);
}

@Override
public void start(Stage stage) {
final TextArea textArea = new TextArea();
final StackPane background = new StackPane(textArea);
final Scene scene = new Scene(background, 600, 500);

stage.setScene(scene);
stage.show();

Platform.runLater(() -> {
background.getChildren().clear();
textArea.setSkin(null);
});
}

}
---------- END SOURCE ----------

FREQUENCY : always