src/test/ui/async-await/issues/issue-63388-1.rs

// edition:2018

struct Xyz {
    a: u64,
}

trait Foo {}

impl Xyz {
    async fn do_sth<'a>(
        &'a self, foo: &dyn Foo
    ) -> &dyn Foo //~ ERROR lifetime mismatch
    {
        foo
    }
}

fn main() {}