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Using I20101029-1118 (4.1 build), I got the following exception. Unfortunately no steps to reproduce for now. !ENTRY org.eclipse.e4.ui.workbench.swt 4 2 2010-11-03 10:42:08.891 !MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.e4.ui.workbench.swt". !STACK 0 java.lang.NullPointerException at org.eclipse.jdt.internal.ui.text.JavaReconciler.uninstall(JavaReconciler.java:341) at org.eclipse.jface.text.source.SourceViewer.unconfigure(SourceViewer.java:706) at org.eclipse.jdt.internal.ui.javaeditor.JavaSourceViewer.unconfigure(JavaSourceViewer.java:357) at org.eclipse.jface.text.source.SourceViewer.handleDispose(SourceViewer.java:759) at org.eclipse.jface.text.source.projection.ProjectionViewer.handleDispose(ProjectionViewer.java:1363) at org.eclipse.jdt.internal.ui.javaeditor.JavaSourceViewer.handleDispose(JavaSourceViewer.java:462) at org.eclipse.jface.text.TextViewer$2.widgetDisposed(TextViewer.java:1799) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:123) 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.Widget.notifyListeners(Widget.java:774) at org.eclipse.swt.custom.StyledText.handleDispose(StyledText.java:5829) at org.eclipse.swt.custom.StyledText$7.handleEvent(StyledText.java:5655) 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:1058) at org.eclipse.swt.widgets.Widget.release(Widget.java:808) at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:872) at org.eclipse.swt.widgets.Canvas.releaseChildren(Canvas.java:167) at org.eclipse.swt.widgets.Widget.release(Widget.java:811) at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:872) at org.eclipse.swt.widgets.Widget.release(Widget.java:811) at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:872) at org.eclipse.swt.widgets.Widget.release(Widget.java:811) at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:872) at org.eclipse.swt.widgets.Widget.release(Widget.java:811) at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:872) at org.eclipse.swt.widgets.Widget.release(Widget.java:811) at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:872) at org.eclipse.swt.widgets.Widget.release(Widget.java:811) at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:872) at org.eclipse.swt.widgets.Widget.release(Widget.java:811) at org.eclipse.swt.widgets.Widget.dispose(Widget.java:446) at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.disposeWidget(SWTPartRenderer.java:134) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(PartRenderingEngine.java:629) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$1(PartRenderingEngine.java:592) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:587) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(PartRenderingEngine.java:573) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$1.handleEvent(PartRenderingEngine.java:134) at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:41) at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:197) at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197) at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1) at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135) 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.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:58) at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:380) at org.eclipse.e4.ui.model.application.ui.basic.impl.PartImpl.setToBeRendered(PartImpl.java:552) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.hidePart(PartServiceImpl.java:882) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.hidePart(PartServiceImpl.java:832) at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.closePart(StackRenderer.java:493) at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.access$5(StackRenderer.java:478) at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer$5.close(StackRenderer.java:461) at org.eclipse.e4.ui.widgets.CTabFolder.onMouse(CTabFolder.java:1637) at org.eclipse.e4.ui.widgets.CTabFolder$2.handleEvent(CTabFolder.java:270) 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.Display.runDeferredEvents(Display.java:4084) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3675) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$6.run(PartRenderingEngine.java:783) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:692) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:104) at org.eclipse.ui.internal.Workbench$3.run(Workbench.java:542) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:524) 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:196) 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:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:621) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:576) at org.eclipse.equinox.launcher.Main.run(Main.java:1409) at org.eclipse.equinox.launcher.Main.main(Main.java:1385)
Could the Java compare editor be involved? Is the editor detached?
It looks like: fTextEditor.getSite() can return null.
I got NPE inside e4 just before this happened. So I guess it might be related to some UI not properly initialized. See bug 329355 and bug 329358.
(In reply to comment #2) > It looks like: > fTextEditor.getSite() can return null. Well, it *is* null but it is not *allowed* to be null at the time of disposal (see Javadoc). Most likely during part close, the disposal of the widgets is not directly done but somehow done later (async). This can perfectly be caused by the NPE mentioned in the previous comment (bug 329355). Closing as DUP since there's no FUP field. *** This bug has been marked as a duplicate of bug 329355 ***
