NPE thrown when control residing in TabPane becomes focus-ineligible

If I run the attached test program and click the "New tab" button, the following stack trace appears in stderr:

java.lang.NullPointerException
at com.sun.javafx.scene.traversal.ContainerTabOrder.findNextFocusablePeer(ContainerTabOrder.java:69)
at com.sun.javafx.scene.traversal.ContainerTabOrder.traverse(ContainerTabOrder.java:34)
at com.sun.javafx.scene.traversal.TraversalEngine.trav(TraversalEngine.java:83)
at com.sun.javafx.scene.control.skin.TabPaneSkin$TabContentRegion.onTraverse(TabPaneSkin.java:1119)
at com.sun.javafx.scene.traversal.TraversalEngine.trav(TraversalEngine.java:94)
at com.sun.javafx.scene.control.skin.TabPaneSkin$TabContentRegion$3.trav(TabPaneSkin.java:1096)
at javafx.scene.Scene.traverse(Scene.java:1190)
at javafx.scene.Scene.focusIneligible(Scene.java:1209)
at javafx.scene.Scene.access$2500(Scene.java:105)
at javafx.scene.Scene$ScenePulseListener.focusCleanup(Scene.java:1554)
at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:1582)
at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:268)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:358)
at com.sun.javafx.tk.quantum.QuantumToolkit$10.run(QuantumToolkit.java:294)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
at com.sun.glass.ui.win.WinApplication$1$1.run(WinApplication.java:49)
at java.lang.Thread.run(Thread.java:662)

This only happens if the TabPane is the root of the scene. That is, the problem is not reproducible if the TabPane is added as a child to another node.