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java.lang.NullPointerException: 	at org.eclipse.swt.widgets.MenuItem.getAccelGroup(MenuItem.java:316)	at org.eclipse.swt.widgets.MenuItem.setEnabled(MenuItem.java:640)	at org.eclipse.ui.menus.CommandContributionItem.updateMenuItem(CommandContributionItem.java:627)	at org.eclipse.ui.menus.CommandContributionItem.update(CommandContributionItem.java:576)	at org.eclipse.jface.action.MenuManager.update(MenuManager.java:876)	at org.eclipse.jface.action.MenuManager.update(MenuManager.java:876)	at org.eclipse.ui.internal.Workbench.updateActiveWorkbenchWindowMenuManager(Workbench.java:3276)	at org.eclipse.ui.internal.Workbench.access$0(Workbench.java:3238)	at org.eclipse.ui.internal.Workbench$2.bindingManagerChanged(Workbench.java:3224)	at org.eclipse.jface.bindings.BindingManager.fireBindingManagerChanged(BindingManager.java:900)	at org.eclipse.jface.bindings.BindingManager.setActiveBindings(BindingManager.java:2176)	at org.eclipse.jface.bindings.BindingManager.recomputeBindings(BindingManager.java:1742)	at org.eclipse.jface.bindings.BindingManager.contextManagerChanged(BindingManager.java:689)	at org.eclipse.core.commands.contexts.ContextManager.fireContextManagerChanged(ContextManager.java:165)	at org.eclipse.core.commands.contexts.ContextManager.removeActiveContext(ContextManager.java:245)	at org.eclipse.ui.internal.contexts.ContextAuthority.updateContext(ContextAuthority.java:758)	at org.eclipse.ui.internal.contexts.ContextAuthority.deactivateContext(ContextAuthority.java:344)	at org.eclipse.ui.internal.contexts.ContextAuthority$1.widgetDisposed(ContextAuthority.java:283)	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:1258)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1282)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1263)	at org.eclipse.swt.widgets.Widget.release(Widget.java:1080)	at org.eclipse.swt.widgets.Control.release(Control.java:3304)	at org.eclipse.swt.widgets.Widget.dispose(Widget.java:462)	at org.eclipse.swt.widgets.Shell.dispose(Shell.java:2241)	at org.eclipse.jface.window.Window.close(Window.java:335)	at org.eclipse.jface.dialogs.Dialog.close(Dialog.java:979)	at org.eclipse.jface.dialogs.TrayDialog.close(TrayDialog.java:179)	at org.eclipse.ui.internal.statushandlers.InternalDialog.close(InternalDialog.java:710)	at org.eclipse.jface.dialogs.Dialog.okPressed(Dialog.java:940)	at org.eclipse.jface.dialogs.Dialog.buttonPressed(Dialog.java:472)	at org.eclipse.ui.internal.statushandlers.InternalDialog.buttonPressed(InternalDialog.java:190)	at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:624)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:234)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3540)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3161)	at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)	at org.eclipse.jface.window.Window.open(Window.java:801)	at org.eclipse.ui.internal.views.log.EventDetailsDialog.open(EventDetailsDialog.java:176)	at org.eclipse.ui.internal.views.log.EventDetailsDialogAction.run(EventDetailsDialogAction.java:98)	at org.eclipse.ui.internal.views.log.LogView$15.doubleClick(LogView.java:536)	at org.eclipse.jface.viewers.StructuredViewer$1.run(StructuredViewer.java:824)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)	at org.eclipse.jface.viewers.StructuredViewer.fireDoubleClick(StructuredViewer.java:822)	at org.eclipse.jface.viewers.AbstractTreeViewer.handleDoubleSelect(AbstractTreeViewer.java:1421)	at org.eclipse.jface.viewers.StructuredViewer$4.widgetDefaultSelected(StructuredViewer.java:1225)	at org.eclipse.jface.util.OpenStrategy.fireDefaultSelectionEvent(OpenStrategy.java:238)	at org.eclipse.jface.util.OpenStrategy.access$0(OpenStrategy.java:235)	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:296)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3540)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3161)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)	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:620)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)	at org.eclipse.equinox.launcher.Main.run(Main.java:1408)	at org.eclipse.equinox.launcher.Main.main(Main.java:1384)