QFileSystemWatcher::removePath return false but remove file successfuly

 //create handle
 if (handle.handle != INVALID_HANDLE_VALUE) {
                QWindowsFileSystemWatcherEngineThread::PathInfoHash &h =
                        thread->pathInfoForHandle[handle.handle];
//hash "h" contains all wathed files!!! not only removed file
                if (h.remove(QFileSystemWatcherPathKey(fileInfo.absoluteFilePath()))) {
                    files->removeAll(path);
                    directories->removeAll(path);

                    if (h.isEmpty()) { //Warning: h is not empty! It contain other watched files!
                        DEBUG() << "Closing handle" << handle.handle;
                       ... //do some work

                        it.remove(); //error: we removes iterator only if h no contains other files!!! 
                   }