pub trait Bar<T: core::fmt::Debug> {
    fn meth(&mut self, x: Baz<T>);
}

#[derive(Debug)]
struct Baz<T>  {
    x: T,
}

#[derive(Debug)]
#[allow(dead_code)]
struct Foo {}

impl<T: core::fmt::Debug> Bar<T> for Foo {
    fn meth(&mut self, x: Baz<T>) {
        dbg!(self);
        dbg!(x);
    }
}

fn main() {
    dbg!();
    println!("hello");
}