java.lang.ArrayIndexOutOfBoundsException
        at java.lang.System.arraycopy(System.java:0)
        at org.netbeans.editor.DocumentContent.copySpanChars(DocumentContent.java:280)
        at org.netbeans.editor.DocumentContent.getText(DocumentContent.java:185)
        at org.netbeans.editor.DocumentContent.getString(DocumentContent.java:169)
        at javax.swing.text.AbstractDocument.getText(AbstractDocument.java:757)
        at org.netbeans.modules.diff.builtin.visualizer.editable.EditableDiffView$RefreshDiffTask.computeDiff(EditableDiffView.java:985)
        at org.netbeans.modules.diff.builtin.visualizer.editable.EditableDiffView$RefreshDiffTask.run(EditableDiffView.java:960)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:573)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)