Description Michael Keppler 2021-09-21 05:41:11 EDT

In the history view, select a commit without parent and another commit, then use "Show unified diff". An NPE is thrown when trying to calculate the parent of the commit without parent.

I'm not sure if anyone typically runs into this situation. For me it happened after recovering from bug 576049, since that left me on a branch without commits, due to breaking in the middle of the rename branch operation.

java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
	at org.eclipse.jgit.revwalk.RevCommit.getParent(RevCommit.java:331)
	at org.eclipse.egit.ui.internal.commit.DiffViewer$OpenLink.getHyperlinkText(DiffViewer.java:771)
	at org.eclipse.jface.text.hyperlink.MultipleHyperlinkPresenter$LinkListInformationControl$LinkLabelProvider.getText(MultipleHyperlinkPresenter.java:124)
	at org.eclipse.jface.viewers.ColumnLabelProvider.update(ColumnLabelProvider.java:40)
	at org.eclipse.jface.viewers.ViewerColumn.refresh(ViewerColumn.java:144)
	at org.eclipse.jface.viewers.AbstractTableViewer.doUpdateItem(AbstractTableViewer.java:396)
	at org.eclipse.jface.viewers.StructuredViewer$UpdateItemSafeRunnable.run(StructuredViewer.java:427)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:174)
	at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:2109)
	at org.eclipse.jface.viewers.AbstractTableViewer.createItem(AbstractTableViewer.java:288)
	at org.eclipse.jface.viewers.AbstractTableViewer.internalRefreshAll(AbstractTableViewer.java:726)
	at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:618)
	at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:610)
	at org.eclipse.jface.viewers.AbstractTableViewer.lambda$0(AbstractTableViewer.java:572)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1398)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1359)
	at org.eclipse.jface.viewers.AbstractTableViewer.inputChanged(AbstractTableViewer.java:572)
	at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:282)
	at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1632)
	at org.eclipse.jface.text.hyperlink.MultipleHyperlinkPresenter$LinkListInformationControl.deferredCreateContent(MultipleHyperlinkPresenter.java:250)
	at org.eclipse.jface.text.hyperlink.MultipleHyperlinkPresenter$LinkListInformationControl.setInput(MultipleHyperlinkPresenter.java:165)
	at org.eclipse.jface.text.AbstractInformationControlManager.internalShowInformationControl(AbstractInformationControlManager.java:1151)
	at org.eclipse.jface.text.AbstractInformationControlManager.presentInformation(AbstractInformationControlManager.java:1120)
	at org.eclipse.jface.text.AbstractInformationControlManager.setInformation(AbstractInformationControlManager.java:431)
	at org.eclipse.jface.text.hyperlink.MultipleHyperlinkPresenter$MultipleHyperlinkHoverManager.computeInformation(MultipleHyperlinkPresenter.java:582)
	at org.eclipse.jface.text.AbstractInformationControlManager.doShowInformation(AbstractInformationControlManager.java:1101)
	at org.eclipse.jface.text.AbstractInformationControlManager.showInformation(AbstractInformationControlManager.java:1091)
	at org.eclipse.jface.text.hyperlink.MultipleHyperlinkPresenter.showHyperlinks(MultipleHyperlinkPresenter.java:782)
	at org.eclipse.jface.text.hyperlink.HyperlinkManager.showHyperlinks(HyperlinkManager.java:556)
	at org.eclipse.jface.text.hyperlink.HyperlinkManager.mouseMove(HyperlinkManager.java:458)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:216)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4237)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1060)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4054)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3626)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1150)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1041)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1467)