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1. Window > New Window 2. Window > Open Perspective > Java Browsing 3. Select a project in the 'Projects' view. 4. Close the second window. org.eclipse.core.runtime.AssertionFailedException: assertion failed: ContentViewer must have a content provider when input is set. at org.eclipse.core.runtime.Assert.isTrue(Assert.java:110) at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:266) at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1664) at org.eclipse.jdt.internal.ui.browsing.PackageViewerWrapper.setViewerInput(PackageViewerWrapper.java:325) at org.eclipse.jdt.internal.ui.browsing.PackagesView.setViewerWrapperInput(PackagesView.java:338) at org.eclipse.jdt.internal.ui.browsing.PackagesView.setInput(PackagesView.java:333) at org.eclipse.jdt.internal.ui.browsing.JavaBrowsingPart.selectionChanged(JavaBrowsingPart.java:753) at org.eclipse.ui.internal.e4.compatibility.SelectionService.notifyListeners(SelectionService.java:135) at org.eclipse.ui.internal.e4.compatibility.SelectionService.access$3(SelectionService.java:133) at org.eclipse.ui.internal.e4.compatibility.SelectionService$1.selectionChanged(SelectionService.java:73) at org.eclipse.e4.ui.internal.workbench.SelectionServiceImpl.notifyListeners(SelectionServiceImpl.java:196) at org.eclipse.e4.ui.internal.workbench.SelectionServiceImpl.access$4(SelectionServiceImpl.java:191) at org.eclipse.e4.ui.internal.workbench.SelectionServiceImpl$2.changed(SelectionServiceImpl.java:234) at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:95) at org.eclipse.e4.core.internal.contexts.EclipseContext.processScheduled(EclipseContext.java:332) at org.eclipse.e4.core.internal.contexts.EclipseContext.set(EclipseContext.java:349) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.clearContext(PartRenderingEngine.java:599) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:545) at org.eclipse.ui.internal.WorkbenchWindow.hardClose(WorkbenchWindow.java:1358) at org.eclipse.ui.internal.WorkbenchWindow.busyClose(WorkbenchWindow.java:1059) at org.eclipse.ui.internal.WorkbenchWindow.access$9(WorkbenchWindow.java:1038) at org.eclipse.ui.internal.WorkbenchWindow$6.run(WorkbenchWindow.java:1085) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1083) at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1099) at org.eclipse.ui.internal.WorkbenchWindow$4.close(WorkbenchWindow.java:427) at org.eclipse.e4.ui.workbench.renderers.swt.WBWRenderer$8.shellClosed(WBWRenderer.java:421) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:98) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062) at org.eclipse.swt.widgets.Decorations.closeWidget(Decorations.java:308) at org.eclipse.swt.widgets.Decorations.WM_CLOSE(Decorations.java:1665) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4162) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1598) at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2038) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4873) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2454) at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:497) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4251) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1598) at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2038) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4886) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2459) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3655) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:724) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:633) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:106) at org.eclipse.ui.internal.Workbench$3.run(Workbench.java:546) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:528) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
The selection listener should have been removed when the 'Packages' view was disposed. The view does not appear to be disposed because of bug 323496. *** This bug has been marked as a duplicate of bug 323496 ***