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java.lang.IllegalArgumentException: Comparison method violates its general contract!	at java.util.TimSort.mergeHi(TimSort.java:868)	at java.util.TimSort.mergeAt(TimSort.java:485)	at java.util.TimSort.mergeForceCollapse(TimSort.java:426)	at java.util.TimSort.sort(TimSort.java:223)	at java.util.TimSort.sort(TimSort.java:173)	at java.util.Arrays.sort(Arrays.java:659)	at org.eclipse.jface.viewers.ViewerComparator.sort(ViewerComparator.java:189)	at org.eclipse.jface.viewers.StructuredViewer.getSortedChildren(StructuredViewer.java:1061)	at org.eclipse.jface.viewers.AbstractTableViewer.internalRefreshAll(AbstractTableViewer.java:667)	at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:615)	at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:607)	at org.eclipse.jface.viewers.AbstractTableViewer$1.run(AbstractTableViewer.java:567)	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1436)	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1397)	at org.eclipse.jface.viewers.CheckboxTableViewer.preservingSelection(CheckboxTableViewer.java:344)	at org.eclipse.jface.viewers.AbstractTableViewer.inputChanged(AbstractTableViewer.java:564)	at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:292)	at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1675)	at org.eclipse.ui.dialogs.WizardNewProjectReferencePage.createControl(WizardNewProjectReferencePage.java:98)	at org.eclipse.jface.wizard.WizardDialog.updateForPage(WizardDialog.java:1276)	at org.eclipse.jface.wizard.WizardDialog.access$4(WizardDialog.java:1268)	at org.eclipse.jface.wizard.WizardDialog$8.run(WizardDialog.java:1257)	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)	at org.eclipse.jface.wizard.WizardDialog.showPage(WizardDialog.java:1254)	at org.eclipse.jface.wizard.WizardDialog.nextPressed(WizardDialog.java:942)	at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:434)	at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:619)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4486)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1388)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3831)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3441)	at org.eclipse.jface.window.Window.runEventLoop(Window.java:832)	at org.eclipse.jface.window.Window.open(Window.java:808)	at org.eclipse.ui.internal.handlers.WizardHandler$New.executeHandler(WizardHandler.java:269)	at org.eclipse.ui.internal.handlers.WizardHandler.execute(WizardHandler.java:290)	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:294)	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:247)	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:229)	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)	at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:149)	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:499)	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210)	at org.eclipse.ui.internal.handlers.LegacyHandlerService.executeCommand(LegacyHandlerService.java:343)	at org.eclipse.ui.internal.actions.CommandAction.runWithEvent(CommandAction.java:159)	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:595)	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:511)	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:420)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4486)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1388)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3831)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3441)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)	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:382)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:236)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)	at org.eclipse.equinox.launcher.Main.main(Main.java:1438)