Rustfmt loses qself type inside struct expr

[dtolnay]

#![feature(more_qualified_paths)]

struct Struct {}

trait Trait {
    type Type;
}

impl Trait for Struct {
    type Type = Self;
}

fn main() {
    let _ = <Struct as Trait>::Type {};
}

As of current master (7b8303d), cargo run --bin rustfmt -- repro.rs --emit=stdout creates the following diff:

-     let _ = <Struct as Trait>::Type {};
+     let _ = Trait::Type {};

which fails to compile:

error[E0223]: ambiguous associated type
  --> repro.rs:14:13
   |
14 |     let _ = Trait::Type {};
   |             ^^^^^^^^^^^ help: use fully-qualified syntax: `<Type as Trait>::Type`

[ytmimi]

Thanks for submitting this report.

I actually worked on something similar not too long ago so I'll push a PR to fix this soon!