引用盒装值的生命周期不够长

use std::borrow::Borrow;

struct Inner<'a> {
    v: Vec<&'a u8>,
}

struct Foo<'a> {
    inner: Inner<'a>,
    derp: Box<u8>,
}

impl<'a> Foo<'a> {
    fn new() -> Foo<'a> {
        let mut e = Foo {
            inner: Inner { v: vec![] },
            derp: Box::new(128),
        };
        e.inner.v.push(&*e.derp);

        return e;
    }

    fn derp(&mut self) {
        println!("{:?}", self.inner.v);
    }
}

fn main() {
    let mut f = Foo::new();

    f.derp();
}

我得到以下错误:

error[E0597]: `*e.derp` does not live long enough
  --> src/main.rs:18:25
   |
18 |         e.inner.v.push(&*e.derp);
   |                         ^^^^^^^ does not live long enough
...
21 |     }
   |     - borrowed value only lives until here
   |
note: borrowed value must be valid for the lifetime 'a as defined on the impl at 12:1...
  --> src/main.rs:12:1
   |
12 | / impl<'a> Foo<'a> {
13 | |     fn new() -> Foo<'a> {
14 | |         let mut e = Foo {
15 | |             inner: Inner { v: vec![] },
...  |
25 | |     }
26 | | }
   | |_^

'a Foo ,正好有那个寿命。

我想知道 傅 在新函数结束时,它很混乱,因此如果尝试在 derp 。我得到一个不同的错误:

error[E0495]: cannot infer an appropriate lifetime for borrow expression due to conflicting requirements
  --> main.rs:20:27
   |
20 |         self.inner.v.push(& *self.derp);
   |                           ^^^^^^^^^^

这没有告诉我编译器认为装箱值的生存期。