IntoIterator deriving fails on typed struct

[hrls]

derive_more = "0.99.11"

use derive_more::IntoIterator;

#[derive(IntoIterator)]
struct Numbers<T> {
    #[into_iterator]
    numbers: Vec<i32>,
    _useless: std::marker::PhantomData<T>,
}

fn main() {
    let nums = Numbers::<()> {
        numbers: vec![100, 200],
        _useless: std::marker::PhantomData,
    };
    assert_eq!(Some(100), nums.into_iter().next());
}