java.lang.NullPointerException
   at org.netbeans.modules.refactoring.java.plugins.PackageRename$PackageRenamePlugin$RenameNonRecursiveFolder.setName(PackageRename.java:255)
   at org.netbeans.modules.refactoring.java.plugins.PackageRename$PackageRenamePlugin$RenameNonRecursiveFolder$1.run(PackageRename.java:202)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:609)
   at org.netbeans.modules.refactoring.java.plugins.PackageRename$PackageRenamePlugin$RenameNonRecursiveFolder.atomicSetName(PackageRename.java:199)
   at org.netbeans.modules.refactoring.java.plugins.PackageRename$PackageRenamePlugin$RenameNonRecursiveFolder.performChange(PackageRename.java:189)
   at org.netbeans.modules.refactoring.api.RefactoringSession.reallyDoRefactoring(RefactoringSession.java:197)
   at org.netbeans.modules.refactoring.api.RefactoringSession.access$100(RefactoringSession.java:79)
   at org.netbeans.modules.refactoring.api.RefactoringSession$1.run(RefactoringSession.java:122)
   at org.netbeans.modules.refactoring.api.RefactoringSession$1.run(RefactoringSession.java:120)
   at org.netbeans.modules.editor.lib.BeforeSaveTasks.runWithOnSaveTasksDisabled(BeforeSaveTasks.java:93)
   at org.netbeans.editor.Utilities.runWithOnSaveTasksDisabled(Utilities.java:1621)
   at org.netbeans.modules.refactoring.api.RefactoringSession.doRefactoring(RefactoringSession.java:120)
   at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$9.run(ParametersPanel.java:480)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)