java.lang.Throwable: Locked by:
   at org.openide.filesystems.FileLock.<init>(FileLock.java:85)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.<init>(LockForFile.java:91)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.tryLock(LockForFile.java:102)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.lock(FileObj.java:359)
   at org.openide.loaders.MultiDataObject$Entry.takeLock(MultiDataObject.java:1356)
   at org.netbeans.modules.cnd.source.CppEditorSupport$Environment.takeLock(CppEditorSupport.java:394)
   at org.openide.text.DataEditorSupport$Env.outputStream(DataEditorSupport.java:891)
   at org.openide.text.CloneableEditorSupport.saveDocument(CloneableEditorSupport.java:1137)
   at org.openide.text.DataEditorSupport.superSaveDoc(DataEditorSupport.java:606)
   at org.openide.text.DataEditorSupport$SaveImpl.run(DataEditorSupport.java:1309)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:607)
   at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:603)
   at org.openide.text.DataEditorSupport.saveDocument(DataEditorSupport.java:602)
   at org.netbeans.modules.editor.global.format.GlobalFormatAction.doFormat(GlobalFormatAction.java:248)
   at org.netbeans.modules.editor.global.format.GlobalFormatAction.access$000(GlobalFormatAction.java:103)
   at org.netbeans.modules.editor.global.format.GlobalFormatAction$ProgressRunnableImpl.run(GlobalFormatAction.java:369)
   at org.netbeans.modules.progress.ui.RunOffEDTImpl$ProgressBackgroundRunner$RunnablePR.run(RunOffEDTImpl.java:481)
   at org.netbeans.modules.progress.ui.RunOffEDTImpl$ProgressBackgroundRunner.runBackground(RunOffEDTImpl.java:458)
   at org.netbeans.modules.progress.ui.AbstractWindowRunner.call(AbstractWindowRunner.java:108)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)