File: issue-60283.rs

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rustc 1.87.0%2Bdfsg1-1
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//@ 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)
}