rustfmt eating up my where clauses on generic associated types

[steffahn]

#![feature(generic_associated_types)]
#![allow(incomplete_features)]

trait Trait<T> {
    type Type<'a> where T: 'a;
    fn foo(x: &T) -> Self::Type<'_>;
}
impl<T> Trait<T> for () {
    type Type<'a> where T: 'a = &'a T;
    fn foo(x: &T) -> Self::Type<'_> {
        x
    }
}

(Playground)

The result after applying rustfmt:

#![feature(generic_associated_types)]
#![allow(incomplete_features)]

trait Trait<T> {
    type Type<'a>;
    fn foo(x: &T) -> Self::Type<'_>;
}
impl<T> Trait<T> for () {
    type Type<'a> = &'a T;
    fn foo(x: &T) -> Self::Type<'_> {
        x
    }
}

[calebcartwright]

Thank you for the report @steffahn. This has already been fixed within rustfmt, just not yet released. Accordingly I am going to go ahead and close this as there's no additional changes to be made within rustfmt.

In the meantime you may want to consider using #[rustfmt::skip] on your types to keep rustfmt from mangling them.