我正在学习Rust，并试图创建一个像egui和多线程的管理面板;一个线程更新散列表中的学生结构体，另一个线程运行egui并显示学生信息;这里的问题，我有：
第一个
下面是实现的完整代码：

pub struct Maestro<'a> {
    pub students: Arc<HashMap<PathBuf, Mutex<Student>>>,
    pub logger: Logger,
    pub actual_student: Option<&'a Mutex<Student>>,
    // Would like to make like this: pub student: Option<&Student> but cannot get reference to
    // Student from mutex's value
}

impl<'a> Maestro<'a> {
    pub fn new() -> Self {
        let config = load_config();
        let watcher = config.watcher;
        let students = Arc::new(watcher.init());
        let mut students_for_thread = Arc::clone(&students);
        std::thread::spawn(move || {
            watcher.run(&mut students_for_thread);
        });
        Maestro {
            students,
            logger: config.logger,
            actual_student: None,
        }
    }
}

impl<'a> eframe::App for Maestro<'a> {
    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
        egui::CentralPanel::default().show(ctx, |ui| {
            for (path, student) in self.students.iter() {
                if let Ok(mutex) = student.try_lock() {
                    ui.horizontal(|ui| {
                        ui.label(&mutex.name);
                        match &mutex.bashrc_editable {
                            true => ui.colored_label(egui::Color32::GREEN, "true"),
                            false => ui.colored_label(egui::Color32::RED, "false"),
                        };
                        if ui.button("See more").clicked() {
                            if self.students.contains_key(path) {
                                self.actual_student = Some(self.students.get(path.deref()).unwrap());
                                // FIXME 10/27/22 ectaclick: lifetime may not live long enough assignment requires that `'1` must outlive `'a`
                            }
                        }
                    });
                }
            }
        });
        // Would like to create a 'popup' on the right of the list
        if self.actual_student.is_some() {
            let student = self.actual_student.unwrap().lock().unwrap();
            egui::SidePanel::right("student").show(ctx, |ui| {
                ui.label(student.name.as_str());
                match student.bashrc_editable {
                    true => ui.colored_label(Color32::GREEN, "true"),
                    false => ui.colored_label(Color32::RED, "false"),
                }
            });
        }
        std::thread::sleep(Duration::from_millis(100));
    }

我试了许多式actual_student：

Option<Student>
Box<Student>
Option<&Student>

尝试复制值，但actual_student与Hashmap中的Student不同，Hashmap是由第二个执行绪更新的Student结构。
但问题还是一样。