java.lang.StringIndexOutOfBoundsException: String index out of range: -6
        at java.lang.String.substring(String.java:1480)
        at java.lang.String.substring(String.java:1447)
        at org.netbeans.editor.ext.java.MDRFinder$ClassImpl.<init>(MDRFinder.java:699)
        at org.netbeans.editor.ext.java.MDRFinder$PackageImpl.getClasses(MDRFinder.java:618)
        at org.netbeans.editor.ext.java.JavaImport.packageStatementFound(JavaImport.java:187)
        at org.netbeans.editor.ext.java.JavaImport.token(JavaImport.java:377)
        at org.netbeans.editor.SyntaxSupport.tokenizeText(SyntaxSupport.java:399)
        at org.netbeans.editor.ext.java.JavaImport.update(JavaImport.java:109)
        at org.netbeans.editor.ext.java.JavaSyntaxSupport.refreshJavaImport(JavaSyntaxSupport.java:167)
        at org.netbeans.modules.editor.java.JavaKit$JavaGotoSourceAction.openSource(JavaKit.java:690)
        at org.netbeans.modules.editor.java.JavaKit$JavaGotoSourceAction.getPopupMenuText(JavaKit.java:733)
        at org.netbeans.modules.editor.java.JavaKit$JavaGenerateGoToPopupAction.getItemText(JavaKit.java:810)
        at org.netbeans.modules.editor.java.JavaKit$JavaGenerateGoToPopupAction.addAction(JavaKit.java:780)
        at org.netbeans.modules.editor.java.JavaKit$2.run(JavaKit.java:821)
        at org.openide.util.Task.run(Task.java:136)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:330)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:677)