680             if let Some(file) = &self.fds[i] {  in clone()
681                 if let Some(file) = file.try_clone() {  in clone()
682                     res.fds[i] = Some(Arc::new(file));  in clone()
721     pub fn alloc_fd(&mut self, file: File, fd: Option<i32>) -> Result<i32, SystemError> {  in alloc_fd()
725                 *x = Some(Arc::new(file));  in alloc_fd()
734                     self.fds[i] = Some(Arc::new(file));  in alloc_fd()
763         let file = self.fds[fd as usize].take().unwrap();  in drop_fd()  localVariable
764         return Ok(file);  in drop_fd()
774             if let Some(file) = &self.fds[i] {  in close_on_exec()
775                 let to_drop = file.close_on_exec();  in close_on_exec()
810             if let Some(file) = self.fds.get_file_by_fd(fd) {  in next()
811                 return Some((fd, file));  in next()