Implementing trait as returning self causes return type to become {unknown}

[tetrogem]

rust-analyzer version: 0.4.1875-standalone (574e23e 2024-03-09)

rustc version: 1.77.0-nightly (d78329b92 2024-01-13)

relevant settings: n/a

repository link (if public, optional): n/a

code snippet to reproduce:

pub trait GetRef<T> {
    fn get(&self) -> &T;
}

impl<T> GetRef<T> for T {
    fn get(&self) -> &T {
        self
    }
}

fn print_u8(inner: impl GetRef<u8>) {
    let x = inner.get(); // ra says --> x: &{unknown}
    println!("Got: {}", x);
}

fn main() {
    print_u8(100);
}

This program, though RA says a type is unknown, compiles successfully and outputs the expected values:

Got: 100

Implementing get in a way that does not return self appears to fix the problem.

Edit: found an even more minimal reproducible example which changes what the bug appears to be, edited the title & code sample accordingly

[flodiebold]

Duplicate of #5514