java.lang.NullPointerException
    at com.sun.prism.impl.ps.BaseShaderGraphics.setPaint(BaseShaderGraphics.java:70)
    at com.sun.javafx.sg.prism.NGShape.renderContent(NGShape.java:129)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:103)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:39)
    at com.sun.javafx.sg.BaseNode.render(BaseNode.java:1000)
    at com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:161)
    at com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:352)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:103)
    at com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:39)
    at com.sun.javafx.sg.BaseNode.render(BaseNode.java:1000)
    at com.sun.javafx.tk.quantum.PaintRunnable.paintImpl(PaintRunnable.java:137)
    at com.sun.javafx.tk.quantum.PaintRunnable.run(PaintRunnable.java:236)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
    at com.sun.prism.tkal.RenderJob.run(RenderJob.java:29)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at com.sun.javafx.tk.quantum.QuantumRenderer$ObservedRunnable.run(QuantumRenderer.java:73)
    at java.lang.Thread.run(Thread.java:662)

Check out MigLayoutFX2 (http://java.net/projects/miglayoutfx2/sources/source-code-repository/show)
Import Maven project in Eclipse and / or setup the classpath yourself.
Start MigLayoutFX2Test2
Resize the window until it hits the right side of the screen.