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Choose two items from the local history which are both not the current version: java.lang.NullPointerException at org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingHelper.uninstall(HighlightingHelper.java:88) at org.eclipse.xtext.ui.editor.XtextEditor.uninstallHighlightingHelper(XtextEditor.java:421) at org.eclipse.xtext.ui.editor.XtextEditor.dispose(XtextEditor.java:436) at org.eclipse.xtext.ui.compare.DefaultMergeViewer.disposeEditors(DefaultMergeViewer.java:136) at org.eclipse.xtext.ui.compare.DefaultMergeViewer.handleDispose(DefaultMergeViewer.java:127) at org.eclipse.jface.viewers.ContentViewer$2.widgetDisposed(ContentViewer.java:214) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:123) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4121) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1453) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1476) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457) at org.eclipse.swt.widgets.Widget.release(Widget.java:1295) at org.eclipse.swt.widgets.Control.release(Control.java:2804) at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:903) at org.eclipse.swt.widgets.Widget.release(Widget.java:1298) at org.eclipse.swt.widgets.Control.release(Control.java:2804) at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:903) at org.eclipse.swt.widgets.Widget.release(Widget.java:1298) at org.eclipse.swt.widgets.Control.release(Control.java:2804) at org.eclipse.swt.widgets.Widget.dispose(Widget.java:662) at org.eclipse.compare.internal.CompareEditor.doSetInput(CompareEditor.java:283) at org.eclipse.compare.internal.CompareEditor.setInput(CompareEditor.java:254) at org.eclipse.compare.internal.CompareUIPlugin$1.run(CompareUIPlugin.java:513) at org.eclipse.compare.internal.CompareUIPlugin.syncExec(CompareUIPlugin.java:1263) at org.eclipse.compare.internal.CompareUIPlugin.internalOpenEditor(CompareUIPlugin.java:534) at org.eclipse.compare.internal.CompareUIPlugin.openEditorInBackground(CompareUIPlugin.java:504) at org.eclipse.compare.internal.CompareUIPlugin.openCompareEditor(CompareUIPlugin.java:493) at org.eclipse.compare.CompareUI.reuseCompareEditor(CompareUI.java:199) at org.eclipse.compare.CompareUI.reuseCompareEditor(CompareUI.java:180) at org.eclipse.team.internal.ui.actions.CompareRevisionAction.openInCompare(CompareRevisionAction.java:139) at org.eclipse.team.internal.ui.actions.CompareRevisionAction.run(CompareRevisionAction.java:102) at org.eclipse.ui.actions.BaseSelectionListenerAction.runWithEvent(BaseSelectionListenerAction.java:168) 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.Display.sendEvent(Display.java:4121) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1453) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1476) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1461) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1266) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3967) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3606) 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(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:592) 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)
Tested with Eclipse 3.7RC1
I misinterpreted the exception trace: It happens as soon as you try to close the compare editor and does not depend on the fact that both versions are not the current version.
Created attachment 196331 [details] proposed patch
pushed to master
Closing all bugs that were set to RESOLVED before Neon.0
