Poor error message when using self: Box<Self>

[mtak-]

The following code produces a very confusing error message.

struct Foo;

impl Foo {
    fn consume(self: Box<Self>) {}
}

fn bar() {
    let x = Foo;
    x.consume();
}

error[E0599]: no method named `consume` found for type `Foo` in the current scope
 --> src/lib.rs:9:7
  |
1 | struct Foo;
  | ----------- method `consume` not found for this
...
9 |     x.consume();
  |       ^^^^^^^
  |
  = help: items from traits can only be used if the trait is implemented and in scope
  = note: the following trait defines an item `consume`, perhaps you need to implement it:
          candidate #1: `std::io::BufRead`

error: aborting due to previous error

I would expect it to mention that consume expects Box<Foo> but x is only of type Foo.

[estebank]

This should be handled by #64056. If you update to latest nightly you should see:

error[E0599]: no method named `consume` found for type `Foo` in the current scope
 --> file.rs:9:7
  |
1 | struct Foo;
  | ----------- method `consume` not found for this
...
4 |     fn consume(self: Box<Self>) {}
  |        ------- the method is available for `std::boxed::Box<Foo>` here
...
9 |     x.consume();
  |       ^^^^^^^
  |
  = help: items from traits can only be used if the trait is implemented and in scope
  = note: the following trait defines an item `consume`, perhaps you need to implement it:
          candidate #1: `std::io::BufRead`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0599, E0601.
For more information about an error, try `rustc --explain E0599`.

[mtak-]

Ah great thanks for the hard work!