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The service root has been set to null for reasons that are beyond me at the moment. org.eclipse.e4.core.services.internal.context.InjectionException: Unexpected error invoking method "preDestroy" at org.eclipse.e4.core.services.internal.context.InjectionMethod.invoke(InjectionMethod.java:63) at org.eclipse.e4.core.services.internal.context.InjectionClass.processPreDestory(InjectionClass.java:113) at org.eclipse.e4.core.services.internal.context.InjectionClass.notify(InjectionClass.java:40) at org.eclipse.e4.core.services.internal.context.EclipseContext$TrackableComputationExt.notify(EclipseContext.java:153) at org.eclipse.e4.core.services.internal.context.EclipseContext$TrackableComputationExt.doHandleInvalid(EclipseContext.java:135) at org.eclipse.e4.core.services.internal.context.Computation.handleInvalid(Computation.java:59) at org.eclipse.e4.core.services.internal.context.EclipseContext.dispose(EclipseContext.java:298) at org.eclipse.e4.ui.workbench.swt.internal.PartRenderingEngine.removeGui(PartRenderingEngine.java:427) at org.eclipse.e4.ui.workbench.swt.internal.PartRenderingEngine$1.handleEvent(PartRenderingEngine.java:98) at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:41) at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:188) at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:198) at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:227) at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:149) at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:139) at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78) at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39) at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:73) at org.eclipse.e4.workbench.ui.internal.UIEventPublisher.notifyChanged(UIEventPublisher.java:58) at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:280) at org.eclipse.e4.ui.model.application.impl.PartImpl.setToBeRendered(PartImpl.java:507) at org.eclipse.e4.workbench.ui.internal.PartServiceImpl.hidePart(PartServiceImpl.java:520) at org.eclipse.e4.workbench.ui.renderers.swt.StackRenderer$6.close(StackRenderer.java:425) at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1570) at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:261) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1050) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4014) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3605) at org.eclipse.e4.ui.workbench.swt.internal.PartRenderingEngine$5.run(PartRenderingEngine.java:553) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.workbench.swt.internal.PartRenderingEngine.run(PartRenderingEngine.java:475) at org.eclipse.e4.workbench.ui.internal.E4Workbench.createAndRunUI(E4Workbench.java:107) at org.eclipse.ui.internal.Workbench$3.run(Workbench.java:525) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:511) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:195) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:600) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:611) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:566) at org.eclipse.equinox.launcher.Main.run(Main.java:1363) at org.eclipse.equinox.launcher.Main.main(Main.java:1339) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:600) at org.eclipse.e4.core.services.internal.context.InjectionMethod.callMethod(InjectionMethod.java:96) at org.eclipse.e4.core.services.internal.context.InjectionMethod.invoke(InjectionMethod.java:60) ... 50 more Caused by: java.lang.NullPointerException at org.eclipse.e4.workbench.ui.internal.SelectionServiceImpl.preDestroy(SelectionServiceImpl.java:80) ... 56 more
It seems to me as if the root is set to null _before_ the @PD is called. Now if I invert the listener notification in EclipseContext's dispose() method, then I get an NPE because the event broker is null. :o
Upon further investigations, I believe this has been caused by bug 304859.
*** This bug has been marked as a duplicate of bug 304859 ***
