java.lang.IllegalArgumentException: internal compiler error in children replace trigger: childSet.size() != sizeof children

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internal compiler error in children replace trigger: childSet.size() != sizeof children
java.lang.IllegalArgumentException: internal compiler error in children replace trigger: childSet.size() != sizeof children
at javafx.scene.Parent.onReplace$children(Parent.fx:539)
at javafx.scene.Parent.invalidate$children(Parent.fx:129)
at javafx.scene.Group.invalidate$content(Group.fx:81)
at twitter.gui.GUI$GUI$Script$1Local$25$1Group$ObjLit$17.update$(GUI.fx:1303)
at twitter.gui.GUI$GUI$Script$1Local$25$1Group$ObjLit$17.update$(GUI.fx:1303)
at com.sun.javafx.runtime.DependentsManager.notifyDependents(DependentsManager.java:100)
at com.sun.javafx.runtime.FXBase.notifyDependents$(FXBase.java:218)
at com.sun.javafx.runtime.FXBase.notifyDependents$(FXBase.java:214)
at twitter.gui.GUI$GUI$Script$1Local$25.invalidate$Local$25$$content$ol$7(GUI.fx:1299)
at twitter.gui.GUI$GUI$Script$1Local$25.invalidate$_$Y(GUI.fx:1299)
at com.sun.javafx.runtime.DependentsManager.notifyDependents(DependentsManager.java:100)
at javafx.scene.control.Cell.invalidate$item(Cell.fx:382)
at javafx.scene.control.Cell.set$item(Cell.fx:382)
at javafx.scene.control.Cell.updateItem(Cell.fx:448)
at com.sun.javafx.scene.control.skin.VirtualFlow.addToPile(VirtualFlow.fx:1084)
at com.sun.javafx.scene.control.skin.VirtualFlow.addAllToPile(VirtualFlow.fx:1075)
at javafx.scene.layout.Container.impl_layoutChildren(Container.fx:1209)
at javafx.scene.Parent.layout(Parent.fx:831)
at javafx.scene.Scene.doLayoutPass(Scene.fx:352)
at javafx.scene.Scene$ScenePulseListener.pulse(Scene.fx:925)
at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.fx:143)
at com.sun.javafx.tk.Toolkit.handleMasterTimerPulse(Toolkit.fx:132)
at com.sun.javafx.tk.Toolkit$1com$ObjLit$5.firePulseImpl(Toolkit.fx:304)
at com.sun.scenario.ToolkitAccessor.firePulse(ToolkitAccessor.java:55)
at com.sun.embeddedswing.EmbeddedEventQueue.access$000(EmbeddedEventQueue.java:82)
at com.sun.embeddedswing.EmbeddedEventQueue$2.run(EmbeddedEventQueue.java:473)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:660)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:209)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

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