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

trait X {
    type Y<'a>;
}

const _: () = {
    fn f2<'a>(arg: Box<dyn X<Y<1> = &'a ()>>) {}
    //~^ ERROR associated type takes 1 lifetime argument but 0 lifetime arguments
    //~| ERROR associated type takes 0 generic arguments but 1 generic argument
};

fn main() {}