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eclipse.buildId=4.14.0.I20191210-0610 java.version=1.8.0_231 (After a JUnit plugin session that encountered many packet timeouts) Then quiting the debug and closing all open editors... Double click in GIT staging view gives the trace below and a tab-only editor. java.lang.NullPointerException at org.eclipse.compare.structuremergeviewer.StructureCreator.setupDocument(StructureCreator.java:171) at org.eclipse.compare.structuremergeviewer.StructureCreator.internalCreateStructure(StructureCreator.java:117) at org.eclipse.compare.structuremergeviewer.StructureCreator.lambda$0(StructureCreator.java:94) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72) at org.eclipse.compare.internal.Utilities.runInUIThread(Utilities.java:800) at org.eclipse.compare.structuremergeviewer.StructureCreator.createStructure(StructureCreator.java:99) at org.eclipse.compare.structuremergeviewer.StructureDiffViewer$StructureInfo.createStructure(StructureDiffViewer.java:163) at org.eclipse.compare.structuremergeviewer.StructureDiffViewer$StructureInfo.refresh(StructureDiffViewer.java:141) at org.eclipse.compare.structuremergeviewer.StructureDiffViewer$StructureInfo.setInput(StructureDiffViewer.java:112) at org.eclipse.compare.structuremergeviewer.StructureDiffViewer.compareInputChanged(StructureDiffViewer.java:350) at org.eclipse.compare.structuremergeviewer.StructureDiffViewer.lambda$1(StructureDiffViewer.java:88) at org.eclipse.compare.structuremergeviewer.StructureDiffViewer.lambda$4(StructureDiffViewer.java:326) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72) at org.eclipse.compare.structuremergeviewer.StructureDiffViewer.compareInputChanged(StructureDiffViewer.java:324) at org.eclipse.compare.structuremergeviewer.StructureDiffViewer.compareInputChanged(StructureDiffViewer.java:312) at org.eclipse.jdt.internal.ui.compare.JavaStructureDiffViewer.compareInputChanged(JavaStructureDiffViewer.java:168) at org.eclipse.compare.structuremergeviewer.StructureDiffViewer.inputChanged(StructureDiffViewer.java:281) at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:282) at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1627) at org.eclipse.compare.CompareViewerSwitchingPane.setInput(CompareViewerSwitchingPane.java:268) at org.eclipse.compare.internal.CompareStructureViewerSwitchingPane.setInput(CompareStructureViewerSwitchingPane.java:141) at org.eclipse.compare.CompareEditorInput.feedInput(CompareEditorInput.java:715) at org.eclipse.compare.CompareEditorInput.createContents(CompareEditorInput.java:542) at org.eclipse.compare.internal.CompareEditor.createCompareControl(CompareEditor.java:448) at org.eclipse.compare.internal.CompareEditor.access$6(CompareEditor.java:408) at org.eclipse.compare.internal.CompareEditor$1.lambda$0(CompareEditor.java:366) at org.eclipse.ui.internal.PendingSyncExec.run(PendingSyncExec.java:68) at org.eclipse.ui.internal.UILockListener.doPendingWork(UILockListener.java:171) at org.eclipse.ui.internal.UISynchronizer.lambda$0(UISynchronizer.java:152) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:40) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:185) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3963) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3590) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1160) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1049) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155) at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:660) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:559) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:154) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:150) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438)
After restarting Eclipse, GIT staging view double click works fine. Presumably the many "Did not encounter the UI thread in stack traces." and "Did not encounter the UI thread in stack traces." have corrupted the state upon which the editors depend. Minimally the NPE needs fixing.
