java.lang.NullPointerException
   at org.netbeans.modules.refactoring.java.plugins.PackageRename$PackageRenamePlugin$RenameNonRecursiveFolder.setName(PackageRename.java:264)
   at org.netbeans.modules.refactoring.java.plugins.PackageRename$PackageRenamePlugin$RenameNonRecursiveFolder$1.run(PackageRename.java:201)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:609)
   at org.netbeans.modules.refactoring.java.plugins.PackageRename$PackageRenamePlugin$RenameNonRecursiveFolder.atomicSetName(PackageRename.java:198)
   at org.netbeans.modules.refactoring.java.plugins.PackageRename$PackageRenamePlugin$RenameNonRecursiveFolder.undoChange(PackageRename.java:193)
   at org.netbeans.modules.refactoring.api.RefactoringSession.reallyUndoRefactoring(RefactoringSession.java:271)
   at org.netbeans.modules.refactoring.api.RefactoringSession.access$300(RefactoringSession.java:79)
   at org.netbeans.modules.refactoring.api.RefactoringSession$2.run(RefactoringSession.java:257)
   at org.netbeans.modules.refactoring.api.RefactoringSession$2.run(RefactoringSession.java:255)
   at org.netbeans.modules.editor.lib.BeforeSaveTasks.runWithOnSaveTasksDisabled(BeforeSaveTasks.java:93)
   at org.netbeans.editor.Utilities.runWithOnSaveTasksDisabled(Utilities.java:1618)
   at org.netbeans.modules.refactoring.api.RefactoringSession.undoRefactoring(RefactoringSession.java:255)
   at org.netbeans.modules.refactoring.spi.impl.UndoManager$SessionUndoItem.undo(UndoManager.java:462)
   at org.netbeans.modules.refactoring.spi.impl.UndoManager$1.run(UndoManager.java:224)
   at org.netbeans.modules.refactoring.spi.impl.UndoManager.undo(UndoManager.java:257)
   at org.netbeans.modules.refactoring.spi.impl.RefactoringUndoRedo.undo(RefactoringUndoRedo.java:86)
   at org.openide.actions.UndoRedoAction.actionPerformed(UndoRedoAction.java:224)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
   at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:290)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
   at java.awt.Component.processMouseEvent(Component.java:6505)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
   at java.awt.Component.processEvent(Component.java:6270)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4861)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4832)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4492)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4422)
   at java.awt.Container.dispatchEventImpl(Container.java:2273)
   at java.awt.Window.dispatchEventImpl(Window.java:2719)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:682)
   at java.awt.EventQueue$3.run(EventQueue.java:680)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:696)
   at java.awt.EventQueue$4.run(EventQueue.java:694)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)