src/test/ui/higher-rank-trait-bounds/issue-60283.rs

// check-pass

pub trait Trait<'a> {
    type Item;
}

impl<'a> Trait<'a> for () {
    type Item = ();
}

pub fn foo<T, F>(_: T, _: F)
where
    T: for<'a> Trait<'a>,
    F: for<'a> FnMut(<T as Trait<'a>>::Item),
{
}

fn main() {
    foo((), drop)
}