Incorrect compiler hints for traits with methods defined using raw identifiers

[olegnn]

Code:

#![allow(non_camel_case_types)]

trait r#async {
    fn r#struct(&self) {
        println!("async");
    }
}

trait r#await {
    fn r#struct(&self) {
        println!("await");
    }
}

struct r#fn {}

impl r#async for r#fn {}
impl r#await for r#fn {}

fn main() {
    r#fn {}.r#struct();
}

(Playground)

Error:

error[E0034]: multiple applicable items in scope
  --> src/main.rs:22:13
   |
22 |     r#fn {}.r#struct();
   |             ^^^^^^^^ multiple `struct` found
   |
note: candidate #1 is defined in an impl of the trait `async` for the type `fn`
  --> src/main.rs:5:5
   |
5  |     fn r#struct(&self) {
   |     ^^^^^^^^^^^^^^^^^^
   = help: to disambiguate the method call, write `async::struct(r#fn {})` instead
note: candidate #2 is defined in an impl of the trait `await` for the type `fn`
  --> src/main.rs:11:5
   |
11 |     fn r#struct(&self) {
   |     ^^^^^^^^^^^^^^^^^^
   = help: to disambiguate the method call, write `await::struct(r#fn {})` instead

async::struct(r#fn {}) should be r#async::r#struct(&r#fn {})and await::struct(r#fn {}) should be r#await::r#struct(&r#fn {}). It also misses that function signatures require not self but &self, however this also happens when not using raw identifiers, so I will open another issue for this case.