I started up 2.1.326 RCP build of Fuse IDE, and notice this NPE in my error log. I may have triggered this trying to delete a project from the project view. Right click -> delete. Or the NPE was already there. Just wonder if it the source code could render a NPE on trunk java.lang.NullPointerException at com.fusesource.rider.deployment.DeploymentContributionItem.determineDeploymentConfigurations(DeploymentContributionItem.java:240) at com.fusesource.rider.deployment.DeploymentContributionItem.recreateMenu(DeploymentContributionItem.java:169) at com.fusesource.rider.deployment.DeploymentContributionItem.fill(DeploymentContributionItem.java:63) at org.eclipse.jface.action.MenuManager.doItemFill(MenuManager.java:741) at org.eclipse.jface.action.MenuManager.update(MenuManager.java:822) at org.eclipse.jface.action.MenuManager.update(MenuManager.java:682) at org.eclipse.ui.internal.menus.WorkbenchMenuService.updateManagers(WorkbenchMenuService.java:338) at org.eclipse.ui.internal.menus.WorkbenchMenuService$4.propertyChange(WorkbenchMenuService.java:316) at org.eclipse.ui.internal.services.EvaluationAuthority$1.run(EvaluationAuthority.java:252) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.services.EvaluationAuthority.fireServiceChange(EvaluationAuthority.java:246) at org.eclipse.ui.internal.services.EvaluationAuthority.endSourceChange(EvaluationAuthority.java:197) at org.eclipse.ui.internal.services.EvaluationAuthority.sourceChanged(EvaluationAuthority.java:135) at org.eclipse.ui.internal.services.ExpressionAuthority.sourceChanged(ExpressionAuthority.java:311) at org.eclipse.ui.internal.services.ExpressionAuthority.sourceChanged(ExpressionAuthority.java:290) at org.eclipse.ui.AbstractSourceProvider.fireSourceChanged(AbstractSourceProvider.java:99) at org.eclipse.ui.internal.services.WorkbenchSourceProvider.checkActivePart(WorkbenchSourceProvider.java:401) at org.eclipse.ui.internal.services.WorkbenchSourceProvider.checkActivePart(WorkbenchSourceProvider.java:300) at org.eclipse.ui.internal.services.WorkbenchSourceProvider$1.partDeactivated(WorkbenchSourceProvider.java:247) at org.eclipse.ui.internal.PartListenerList$4.run(PartListenerList.java:117) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.runtime.Platform.run(Platform.java:888) at org.eclipse.ui.internal.PartListenerList.fireEvent(PartListenerList.java:57) at org.eclipse.ui.internal.PartListenerList.firePartDeactivated(PartListenerList.java:115) at org.eclipse.ui.internal.PartService.firePartDeactivated(PartService.java:238) at org.eclipse.ui.internal.PartService.setActivePart(PartService.java:300) at org.eclipse.ui.internal.WWinPartService.updateActivePart(WWinPartService.java:134) at org.eclipse.ui.internal.WWinPartService.access$0(WWinPartService.java:125) at org.eclipse.ui.internal.WWinPartService$WWinListener.partDeactivated(WWinPartService.java:50) at org.eclipse.ui.internal.PartListenerList2$4.run(PartListenerList2.java:115) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.runtime.Platform.run(Platform.java:888) at org.eclipse.ui.internal.PartListenerList2.fireEvent(PartListenerList2.java:55) at org.eclipse.ui.internal.PartListenerList2.firePartDeactivated(PartListenerList2.java:113) at org.eclipse.ui.internal.PartService.firePartDeactivated(PartService.java:242) at org.eclipse.ui.internal.PartService.setActivePart(PartService.java:300) at org.eclipse.ui.internal.WorkbenchPagePartList.fireActivePartChanged(WorkbenchPagePartList.java:57) at org.eclipse.ui.internal.PartList.setActivePart(PartList.java:136) at org.eclipse.ui.internal.WorkbenchPage.setActivePart(WorkbenchPage.java:3636) at org.eclipse.ui.internal.WorkbenchPage.requestActivation(WorkbenchPage.java:3159) at org.eclipse.ui.internal.PartPane.requestActivation(PartPane.java:279) at org.eclipse.ui.internal.PartPane.handleEvent(PartPane.java:237) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4128) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1461) at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1547) at org.eclipse.swt.widgets.Control.sendFocusEvent(Control.java:3299) at org.eclipse.swt.widgets.Display.checkFocus(Display.java:646) at org.eclipse.swt.widgets.Shell.makeFirstResponder(Shell.java:1234) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5581) at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method) at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:220) at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2095) at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2253) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5535) at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method) at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:4989) at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5138) at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method) at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:128) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3610) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) 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:344) 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:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410)