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    /*! ```compile_fail,E0524

    fn quick_sort<T:PartialOrd+Send>(v: &mut [T]) {
        if v.len() <= 1 {
            return;
        }

        let mid = partition(v);
        let (lo, _hi) = v.split_at_mut(mid);
        rayon_core::join(|| quick_sort(lo), || quick_sort(lo)); //~ ERROR
    }

    fn partition<T:PartialOrd+Send>(v: &mut [T]) -> usize {
        let pivot = v.len() - 1;
        let mut i = 0;
        for j in 0..pivot {
            if v[j] <= v[pivot] {
                v.swap(i, j);
                i += 1;
            }
        }
        v.swap(i, pivot);
        i
    }

    fn main() { }

    ``` */

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