fn() -> fn(u8) -> u8 is formatted as fn() -> fn(u8) -> fn(u8) -> u8

[projedi]

I have a function

fn make_lazy(f: fn() -> fn(u8) -> u8) -> impl Fn(u8) -> u8 {
    Box::new(move |x| f()(x))
}

Running rustfmt --check (rustfmt 1.2.2-nightly (5274b49c 2019-04-24)) yeilds

fn make_lazy(f: fn() -> fn(u8) -> fn(u8) -> u8) -> impl Fn(u8) -> u8 {
     Box::new(move |x| f()(x))
 }

fn(u8) -> is duplicated.

• fn() -> (fn(u8) -> u8) yields fn() -> (fn(u8) -> u8) -> (fn(u8) -> u8)
• fn() -> impl Fn(u8) -> u8 yields fn() -> impl Fn(u8) -> impl Fn(u8) -> u8
• impl Fn() -> fn(u8) -> u8 is fine
• fn() -> u8 is also fine

[topecongiro]

This will be fixed in 1.3.0.