Lifetime elision not working properly with self: &mut Rc<Self>

[steffahn]

I tried this code:

use std::rc::Rc;
trait Foo: Clone {
    fn f(self: &mut Rc<Self>) -> &mut Self {
        Rc::make_mut(self)
    }
}

I expected to see this happen: Code compiles

Instead, this happened:

   Compiling playground v0.0.1 (/playground)
error[E0106]: missing lifetime specifier
 --> src/lib.rs:3:34
  |
3 |     fn f(self: &mut Rc<Self>) -> &mut Self {
  |                                  ^ expected named lifetime parameter
  |
  = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
help: consider using the `'static` lifetime
  |
3 |     fn f(self: &mut Rc<Self>) -> &'static mut Self {
  |                                  ~~~~~~~~

(playground)

Meta

Happens on stable, nightly, and older rust versions

---

Same problem for inherent impls

#[derive(Clone)]
struct S;
use std::rc::Rc;
impl S {
    fn f(self: &mut Rc<Self>) -> &mut Self {
        Rc::make_mut(self)
    }
}

[steffahn]

Ah, there it is (duplicate): #69064