java.lang.NullPointerException
        at java.lang.String.indexOf(String.java:1734)
        at java.lang.String.indexOf(String.java:1716)
        at org.netbeans.modules.refactoring.javascript.plugins.RenameRefactoringPlugin$RenameTransformer.searchTokenSequence(RenameRefactoringPlugin.java:866)
        at org.netbeans.modules.refactoring.javascript.plugins.RenameRefactoringPlugin$RenameTransformer.searchTokenSequence(RenameRefactoringPlugin.java:890)
        at org.netbeans.modules.refactoring.javascript.plugins.RenameRefactoringPlugin$RenameTransformer.scan(RenameRefactoringPlugin.java:836)
        at org.netbeans.modules.refactoring.javascript.plugins.JsRefactoringPlugin$TransformTask.run(JsRefactoringPlugin.java:241)
        at org.netbeans.modules.refactoring.javascript.plugins.JsRefactoringPlugin$TransformTask.run(JsRefactoringPlugin.java:228)
        at org.netbeans.napi.gsfret.source.Source.runModificationTask(Source.java:628)
        at org.netbeans.modules.refactoring.javascript.plugins.JsRefactoringPlugin.processFiles(JsRefactoringPlugin.java:208)
        at org.netbeans.modules.refactoring.javascript.plugins.RenameRefactoringPlugin.prepare(RenameRefactoringPlugin.java:539)
        at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:380)
        at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:202)
        at org.netbeans.modules.visualweb.insync.faces.refactoring.FacesJavaFileRenameRefactoringPlugin.prepare(FacesJavaFileRenameRefactoringPlugin.java:357)
        at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:380)
        at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:202)
        at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$Prepare.run(ParametersPanel.java:765)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)