Hi,

I'm currently testing JavaFX 8, and i sometimes (every 1 in 5/6 launches, i'd say) get this bug. I don't think it comes from my gui code, since i'm currently working on some db stuff/it's kept to a minimal state, though i'm far from an experienced developper.

The Javafx window shows up, but with a pale yellow background and a small grey rectangle in the upper left corner.

The error :

:run
Using Modena Theme
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
        at java.util.ArrayList.rangeCheck(ArrayList.java:603)
        at java.util.ArrayList.get(ArrayList.java:381)
        at com.sun.javafx.collections.ObservableListWrapper.get(ObservableListWrapper.java:87)
        at com.sun.javafx.collections.VetoableListDecorator.get(VetoableListDecorator.java:247)
        at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer.computePrefHeight(ContextMenuContent.java:1332)
        at javafx.scene.Parent.prefHeight(Parent.java:864)
        at javafx.scene.layout.Region.prefHeight(Region.java:1183)
        at com.sun.javafx.scene.control.skin.ContextMenuContent.getContentHeight(ContextMenuContent.java:352)
        at com.sun.javafx.scene.control.skin.ContextMenuContent.computePrefHeight(ContextMenuContent.java:322)
        at javafx.scene.Parent.prefHeight(Parent.java:864)
        at javafx.scene.layout.Region.prefHeight(Region.java:1183)
        at javafx.scene.Node.autosize(Node.java:2716)
        at javafx.scene.Parent.layoutChildren(Parent.java:1032)
        at javafx.scene.Group.layoutChildren(Group.java:192)
        at javafx.scene.Parent.layout(Parent.java:1003)
        at javafx.scene.Parent.layout(Parent.java:1011)
        at javafx.scene.Scene.layoutDirtyRoots(Scene.java:576)
        at javafx.scene.Scene.doLayoutPass(Scene.java:547)
        at javafx.scene.Scene.access$3800(Scene.java:183)
        at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:2250)
        at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:351)
        at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:561)
        at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:540)
        at com.sun.javafx.tk.quantum.QuantumToolkit$15.run(QuantumToolkit.java:425)
        at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:94)
        at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
        at com.sun.glass.ui.gtk.GtkApplication.access$200(GtkApplication.java:48)
        at com.sun.glass.ui.gtk.GtkApplication$5$1.run(GtkApplication.java:138)
        at java.lang.Thread.run(Thread.java:722)

My gui code :

  Application.setUserAgentStylesheet(Application.STYLESHEET_MODENA)

  val tabPane = new TabPane()
  val tab1 = new Tab()
  val tab2 = new Tab()
  tab1.setText("new tab")
  tab2.setContent(new Rectangle(200,200, Color.LIGHTSTEELBLUE))
  tabPane.getTabs.addAll(tab1, tab2)

  val toolBar = new ToolBar(
    new Button("New"),
    new Button("Open"),
    new Button("Save"),
    new Separator(),
    new Button("Clean"),
    new Button("Compile"),
    new Button("Run"),
    new Separator(),
    new Button("Debug"),
    new Button("Profile")
  )
  toolBar.setOrientation(Orientation.VERTICAL)
  tab1.setContent(toolBar)

  val scene = new Scene(tabPane, 800, 600, Color.BEIGE)


Sorry if i'm unclear/at the wrong place. I'm not sure for example if Javafx 8.0.0-ea-b81 is lombard ?