`fn f(*) {}` successfully compiles in method position

[petrochenkov]

struct S {
    lol: u8
}

impl S {
    fn f(*) -> u8 {
        self.lol
    }
}

fn main() {
    println!("{}", S{lol:10}.f());
}

prints 10 on stable/beta/nightly.

This is the coolest syntax I've seen this year, now I'll always use * instead of self to save 3 keystrokes.

[durka]

Lol, this is great. So the * token is parsed here and it fabricates a self ident so it doesn't have to panic. But if there is no self after the * then line 4716, which emits the actual error, never executes.

[petrochenkov]

(I'm auditing parsing/resolution of self for hygiene issues, so I'll fix this as well.)