java.lang.NullPointerException
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.registerLock(LockForFile.java:108)
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.tryLock(LockForFile.java:96)
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.lock(FileObj.java:277)
        at org.netbeans.modules.versioning.system.cvss.CvsVersioningSystem.writeCvsIgnoreEntries(CvsVersioningSystem.java:701)
        at org.netbeans.modules.versioning.system.cvss.CvsVersioningSystem.addToCvsIgnore(CvsVersioningSystem.java:653)
        at org.netbeans.modules.versioning.system.cvss.CvsVersioningSystem.setIgnored(CvsVersioningSystem.java:625)
        at org.netbeans.modules.versioning.system.cvss.CvsVersioningSystem.isIgnored(CvsVersioningSystem.java:334)
        at org.netbeans.modules.versioning.system.cvss.FileStatusCache.createMissingEntryFileInformation(FileStatusCache.java:647)
        at org.netbeans.modules.versioning.system.cvss.FileStatusCache.createFileInformation(FileStatusCache.java:537)
        at org.netbeans.modules.versioning.system.cvss.FileStatusCache.scanFolder(FileStatusCache.java:478)
        at org.netbeans.modules.versioning.system.cvss.FileStatusCache.getScannedFiles(FileStatusCache.java:445)
        at org.netbeans.modules.versioning.system.cvss.FileStatusCache.refreshNow(FileStatusCache.java:256)
        at org.netbeans.modules.versioning.system.cvss.FileStatusCache.refresh(FileStatusCache.java:324)
        at org.netbeans.modules.versioning.system.cvss.FilesystemHandler.fileCreatedImpl(FilesystemHandler.java:223)
        at org.netbeans.modules.versioning.system.cvss.FilesystemHandler.access$100(FilesystemHandler.java:60)
        at org.netbeans.modules.versioning.system.cvss.FilesystemHandler$.run(FilesystemHandler.java:204)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)