Run attached sample. Get the following exception:

java.lang.IndexOutOfBoundsException
at com.sun.javafx.collections.ObservableListWrapper.listIterator(ObservableListWrapper.java:161)
at com.sun.javafx.scene.control.skin.SplitPaneSkin.layoutChildren(SplitPaneSkin.java:537)
at javafx.scene.Parent.layout(Parent.java:852)
at javafx.scene.Parent.layout(Parent.java:859)
at javafx.scene.Scene.layoutDirtyRoots(Scene.java:469)
at javafx.scene.Scene.doLayoutPass(Scene.java:442)
at javafx.scene.Scene.access$2700(Scene.java:106)
at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:1575)
at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:268)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:353)
at com.sun.javafx.tk.quantum.QuantumToolkit$10.run(QuantumToolkit.java:289)
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)