java.lang.IndexOutOfBoundsException: Invalid line index=518 >= lineCount=496
        at org.netbeans.editor.LineRootElement.getElement(LineRootElement.java:112)
        at org.openide.text.NbDocument$DocumentRenderer.run(NbDocument.java:669)
        at org.netbeans.editor.BaseDocument.render(BaseDocument.java:1217)
        at org.openide.text.NbDocument$DocumentRenderer.renderToInt(NbDocument.java:644)
        at org.openide.text.NbDocument.findLineOffset(NbDocument.java:176)
        at org.netbeans.modules.merge.builtin.visualizer.MergePanel.copy(MergePanel.java:1113)
        at org.netbeans.modules.merge.builtin.visualizer.MergePanel.copySource1ToResult(MergePanel.java:1088)
        at org.netbeans.modules.merge.builtin.visualizer.MergeControl.copyToResult(MergeControl.java:239)
        at org.netbeans.modules.merge.builtin.visualizer.MergeControl.initialize(MergeControl.java:131)
        at org.netbeans.modules.merge.builtin.visualizer.GraphicalMergeVisualizer.createView(GraphicalMergeVisualizer.java:130)
        at org.netbeans.modules.versioning.system.cvss.ui.actions.diff.ResolveConflictsExecutor$1.run(ResolveConflictsExecutor.java:160)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:284)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)