Description Alexander Weickmann 2012-02-07 04:44:33 EST

Build Identifier:  20110916-0149

Here's the stack trace:

java.lang.NullPointerException
	at org.eclipse.jgit.util.RawParseUtils.author(RawParseUtils.java:560)
	at org.eclipse.jgit.revwalk.RevCommit.getAuthorIdent(RevCommit.java:338)
	at org.eclipse.egit.core.internal.storage.CommitFileRevision.<init>(CommitFileRevision.java:59)
	at org.eclipse.egit.core.internal.storage.GitFileRevision.inCommit(GitFileRevision.java:54)
	at org.eclipse.egit.ui.internal.CompareUtils.getFileRevision(CompareUtils.java:149)
	at org.eclipse.egit.ui.internal.CompareUtils.getFileRevisionTypedElement(CompareUtils.java:109)
	at org.eclipse.egit.ui.internal.history.CommitFileDiffViewer.showTwoWayFileDiff(CommitFileDiffViewer.java:378)
	at org.eclipse.egit.ui.internal.history.CommitFileDiffViewer$6.run(CommitFileDiffViewer.java:225)
	at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
	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:1053)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
	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(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	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)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1386)

I've chosen severity major, as this is a functionality I need very often.

Reproducible: Sometimes

Steps to Reproduce:
1. Pull from repository
2. Open all commits, so you have them as open editors
3. Browse through changes, using "Compare with Version in Ancestor" on the individual files

Sometimes, the compare editor does not open up and the above exception can be found in the error log. I don't know what exactly are the circumstances that cause the exception.