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Bug 322301

Summary:	NPE when selection Create Tag... in history view
Product:	[Technology] EGit	Reporter:	Robin Rosenberg <robin.rosenberg>
Component:	UI	Assignee:	Project Inbox <egit.ui-inbox>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	P3	CC:	jens.baumgart, mathias.kinzler, stefan.lay
Version:	unspecified
Target Milestone:	0.9.0-M3
Hardware:	PC
OS:	Linux
Whiteboard:

Description Robin Rosenberg

2010-08-10 19:37:47 EDT

(No dialog appears)

java.lang.ClassCastException: java.lang.Object cannot be cast to org.eclipse.jface.viewers.ISelection
at org.eclipse.egit.ui.internal.actions.RepositoryActionHandler.getSelection(RepositoryActionHandler.java:192)
at org.eclipse.egit.ui.internal.actions.RepositoryActionHandler.getSelectedResources(RepositoryActionHandler.java:276)
at org.eclipse.egit.ui.internal.actions.DiscardChangesActionHandler.isEnabled(DiscardChangesActionHandler.java:63)
at org.eclipse.egit.ui.internal.actions.RepositoryAction.isEnabled(RepositoryAction.java:128)
at org.eclipse.egit.ui.internal.actions.RepositoryAction.selectionChanged(RepositoryAction.java:105)
at org.eclipse.ui.internal.PluginAction.refreshEnablement(PluginAction.java:206)
at org.eclipse.ui.internal.PluginAction.selectionChanged(PluginAction.java:277)
at org.eclipse.ui.internal.ObjectPluginAction.partClosed(ObjectPluginAction.java:49)
at org.eclipse.ui.internal.PartListenerList2$3.run(PartListenerList2.java:100)
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.firePartClosed(PartListenerList2.java:98)
at org.eclipse.ui.internal.PartService.firePartClosed(PartService.java:227)
at org.eclipse.ui.internal.WorkbenchPagePartList.firePartClosed(WorkbenchPagePartList.java:39)
at org.eclipse.ui.internal.PartList.partClosed(PartList.java:274)
at org.eclipse.ui.internal.PartList.removePart(PartList.java:186)
at org.eclipse.ui.internal.WorkbenchPage.disposePart(WorkbenchPage.java:1720)
at org.eclipse.ui.internal.WorkbenchPage.handleDeferredEvents(WorkbenchPage.java:1426)
at org.eclipse.ui.internal.WorkbenchPage.deferUpdates(WorkbenchPage.java:1410)
at org.eclipse.ui.internal.WorkbenchPage.closeEditors(WorkbenchPage.java:1384)
at org.eclipse.ui.internal.WorkbenchPage.closeAllEditors(WorkbenchPage.java:1188)
at org.eclipse.ui.internal.WorkbenchPage.dispose(WorkbenchPage.java:1770)
at org.eclipse.ui.internal.WorkbenchWindow.closeAllPages(WorkbenchWindow.java:861)
at org.eclipse.ui.internal.WorkbenchWindow.hardClose(WorkbenchWindow.java:1696)
at org.eclipse.ui.internal.WorkbenchWindow.busyClose(WorkbenchWindow.java:734)
at org.eclipse.ui.internal.WorkbenchWindow.access$0(WorkbenchWindow.java:710)
at org.eclipse.ui.internal.WorkbenchWindow$5.run(WorkbenchWindow.java:826)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:824)
at org.eclipse.jface.window.WindowManager.close(WindowManager.java:109)
at org.eclipse.ui.internal.Workbench$18.run(Workbench.java:1105)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.Workbench.busyClose(Workbench.java:1102)
at org.eclipse.ui.internal.Workbench.access$15(Workbench.java:1031)
at org.eclipse.ui.internal.Workbench$25.run(Workbench.java:1275)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.Workbench.close(Workbench.java:1273)
at org.eclipse.ui.internal.Workbench.restart(Workbench.java:2224)
at org.eclipse.equinox.internal.p2.ui.ProvisioningOperationRunner$1.run(ProvisioningOperationRunner.java:92)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3527)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3174)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2629)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2593)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2427)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:670)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:663)
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:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)

Comment 1 Jens Baumgart

2010-08-11 07:48:59 EDT

Looking on the stack trace it seems the exception occured on exiting Eclipse.

Comment 2 Robin Rosenberg

2010-08-12 19:17:37 EDT

I'm sorry, that exception was probably the wrong one. Here is what I get
now, positively the right trace.

java.lang.NullPointerException
	at org.eclipse.egit.ui.internal.actions.RepositoryActionHandler.getRevTags(RepositoryActionHandler.java:321)
	at org.eclipse.egit.ui.internal.actions.CreateTagOnCommitActionHandler.execute(CreateTagOnCommitActionHandler.java:42)
	at org.eclipse.egit.ui.internal.actions.RepositoryAction.run(RepositoryAction.java:98)
	at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
	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:3552)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3171)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2629)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2593)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2427)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:670)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:663)
	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:619)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1407)

Comment 3 Mathias Kinzler

2010-08-24 11:08:30 EDT

Code review at http://egit.eclipse.org/r/#change,1393
This was done originally with another intention, but should also solve this issue.

Comment 4 Stefan Lay

2010-08-25 07:06:23 EDT

Fixed with 59e3bdc8b958cd90b98c48fcfbcd76e2e380e9c7