java.lang.IllegalArgumentException: Duplicate in children list: C:/Projects/Java_Bugs/JDK-7/j_l_Character_names/log/CharacterNamesGenerator7_2b.txt
Children: [MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\.svn@1806663:10fa3a1,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator6.txt@1242c15:88d1f2,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7.txt@1ca3a29:8f6724,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7_0a.txt@1365038:f37078,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7_0b.txt@1195182:1e06c80,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7_1a.txt@13943b2:15a3512,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7_1b.txt@fb68fb:9baec8,valid=
   at org.openide.filesystems.Ordering.getOrder(Ordering.java:101)
   at org.openide.filesystems.FileUtil.getOrder(FileUtil.java:2085)
   at org.openide.loaders.FolderList.carefullySort(FolderList.java:644)
   at org.openide.loaders.FolderList.getObjects(FolderList.java:601)
   at org.openide.loaders.FolderList.access$200(FolderList.java:77)
   at org.openide.loaders.FolderList$1.run(FolderList.java:353)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1957)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.IllegalArgumentException: Duplicate in children list: C:/Projects/Java_Bugs/JDK-7/j_l_Character_names/log/CharacterNamesGenerator7_2b.txt
Children: [MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\.svn@1806663:10fa3a1,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator6.txt@1242c15:88d1f2,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7.txt@1ca3a29:8f6724,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7_0a.txt@1365038:f37078,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7_0b.txt@1195182:1e06c80,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Character_names\log\CharacterNamesGenerator7_1a.txt@13943b2:15a3512,valid=true], MasterFileObject[C:\Projects\Java_Bugs\JDK-7\j_l_Characte
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:451)
   at org.openide.loaders.FolderList.changeComparator(FolderList.java:334)
   at org.openide.loaders.FolderList.fileRenamed(FolderList.java:545)
   at sun.reflect.GeneratedMethodAccessor1207.invoke(GeneratedMethodAccessor1207.java:0)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:459)
   at $Proxy1.fileRenamed(.java:0)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEventImpl(FCLSupport.java:151)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEvent(FCLSupport.java:128)
   at org.openide.filesystems.FCLSupport.dispatchEvent(FCLSupport.java:105)
   at org.openide.filesystems.FileObject$ED.dispatch(FileObject.java:1076)
   at org.openide.filesystems.EventControl.invokeDispatchers(EventControl.java:208)
   at org.openide.filesystems.EventControl.exitAtomicAction(EventControl.java:182)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:542)
   at org.openide.loaders.DataObjectPool.runAtomicAction(DataObjectPool.java:273)
   at org.openide.loaders.DataObject.invokeAtomicAction(DataObject.java:888)
   at org.openide.loaders.DataObject.rename(DataObject.java:685)
   at org.openide.loaders.DataNode.setName(DataNode.java:158)
   at org.openide.loaders.DataNode.setName(DataNode.java:179)
   at org.openide.nodes.FilterNode.setName(FilterNode.java:499)
   at org.openide.actions.RenameAction.performAction(RenameAction.java:99)
   at org.openide.util.actions.NodeAction$DelegateAction$1.run(NodeAction.java:586)
   at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95)
   at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116)
   at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
   at org.openide.util.actions.NodeAction$DelegateAction.actionPerformed(NodeAction.java:583)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
   at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
   at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1223)
   at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1264)
   at java.awt.Component.processMouseEvent(Component.java:6263)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
   at java.awt.Component.processEvent(Component.java:6028)
   at java.awt.Container.processEvent(Container.java:2041)
   at java.awt.Component.dispatchEventImpl(Component.java:4630)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4574)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4238)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4168)
   at java.awt.Container.dispatchEventImpl(Container.java:2085)
   at java.awt.Window.dispatchEventImpl(Window.java:2478)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:137)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)