FULL PRODUCT VERSION :
java version "1.8.0_66"
Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
Java HotSpot(TM) Client VM (build 25.66-b17, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Windows 7 x64

EXTRA RELEVANT SYSTEM CONFIGURATION :
not relevant

A DESCRIPTION OF THE PROBLEM :
When trying to reset the font to its default value with null for Label, a NullPointerException is thrown.

When using the same code, but for a TextField, this works perfectly as expected.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
package com.ita;

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class FontLoad extends Application
{

    @Override
    public void start(Stage primaryStage)
        throws Exception
    {
        Label label = new Label("JavaFX Application");
        label.setFont(null);
        Button button = new Button("My Button");
        VBox box = new VBox(15, label, button);
        box.setAlignment(Pos.CENTER);
        Scene scene = new Scene(box, 500, 300);

        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expected to have a Label with the text "JavaFX Application" displayed with the default font.
ACTUAL -
InvocationTargetException is thrown due to a NullPointerException

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
at com.sun.javafx.scene.control.skin.Utils.computeTextHeight(Utils.java:129)
at com.sun.javafx.scene.control.skin.LabeledSkinBase.computeMinLabeledPartHeight(LabeledSkinBase.java:707)
at com.sun.javafx.scene.control.skin.LabeledSkinBase.computeMinHeight(LabeledSkinBase.java:689)
at javafx.scene.control.Control.computeMinHeight(Control.java:487)
at javafx.scene.Parent.minHeight(Parent.java:949)
at javafx.scene.layout.Region.minHeight(Region.java:1401)
at javafx.scene.layout.Region.computeChildPrefAreaHeight(Region.java:1762)
at javafx.scene.layout.VBox.getAreaHeights(VBox.java:440)
at javafx.scene.layout.VBox.layoutChildren(VBox.java:555)
at javafx.scene.Parent.layout(Parent.java:1079)
at javafx.scene.Scene.doLayoutPass(Scene.java:552)
at javafx.scene.Scene.preferredSize(Scene.java:1646)
at javafx.scene.Scene.impl_preferredSize(Scene.java:1720)
at javafx.stage.Window$9.invalidated(Window.java:846)
at javafx.beans.property.BooleanPropertyBase.markInvalid(BooleanPropertyBase.java:109)
at javafx.beans.property.BooleanPropertyBase.set(BooleanPropertyBase.java:144)
at javafx.stage.Window.setShowing(Window.java:922)
at javafx.stage.Window.show(Window.java:937)
at javafx.stage.Stage.show(Stage.java:259)
at com.ita.FontLoad.start(FontLoad.java:28)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
... 1 more
Exception running application com.ita.FontLoad
---------- END SOURCE ----------