Remove child from rootnode can cause a NegativeArraySizeException

[cbrouwer]

java.lang.NegativeArraySizeException at com.dexels.navajo.dev.dependency.model.TreeBackwardNode.getChildren(TreeBackwardNode.java:33) at com.dexels.navajo.dev.dependency.model.TreeParent.removeChild(TreeParent.java:29) at com.dexels.navajo.dev.dependency.views.ViewContentProvider.refreshRoot(ViewContentProvider.java:111) at com.dexels.navajo.dev.dependency.views.ViewContentProvider.setRoot(ViewContentProvider.java:101) at com.dexels.navajo.dev.dependency.views.CallHierarchyView.updateRoot(CallHierarchyView.java:392) at com.dexels.navajo.dev.dependency.views.CallHierarchyView$MyResourceChangeReporter.updateRootFromWorkbench(CallHierarchyView.java:511) at com.dexels.navajo.dev.dependency.views.CallHierarchyView$MyResourceChangeReporter.partActivated(CallHierarchyView.java:461) at org.eclipse.ui.internal.PartService$1.run(PartService.java:84) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.PartService.partActivated(PartService.java:81) at org.eclipse.ui.internal.WorkbenchWindow$WWinPartService.partActivated(WorkbenchWindow.java:3002) at org.eclipse.ui.internal.WorkbenchPage$14.run(WorkbenchPage.java:4977) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.WorkbenchPage.firePartActivated(WorkbenchPage.java:4974) at org.eclipse.ui.internal.WorkbenchPage.access$19(WorkbenchPage.java:4962) at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated(WorkbenchPage.java:210) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$3.run(PartServiceImpl.java:250) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated(PartServiceImpl.java:247) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:757) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:682) at org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer.activate(AbstractPartRenderer.java:95) at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer$1.handleEvent(ContributedPartRenderer.java:63) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4256) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1501) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1509) at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1612) at org.eclipse.swt.widgets.Control.sendMouseEvent(Control.java:3492) at org.eclipse.swt.widgets.Control.mouseEvent(Control.java:2611) at org.eclipse.swt.widgets.Composite.mouseEvent(Composite.java:936) at org.eclipse.swt.widgets.Control.mouseDown(Control.java:2620) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5733) at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method) at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:227) at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2140) at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2402) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5797) at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method) at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:5226) at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5375) at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method) at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:128) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3703) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610) at org.eclipse.equinox.launcher.Main.run(Main.java:1519)