lambda std::reduce issue

#include <execution>
#include <functional>
#include <vector>
#include <numeric>

int main() {
    std::vector<int> vec(100);
    std::iota(begin(vec), end(vec), 1);
    typedef const std::vector<int>& vec_int;
    std::function<int(vec_int)> reduce_vec = [](vec_int vec) -> int { std::reduce(execution::par, std::begin(vec), std::end(vec)); };
    auto i = reduce_vec(vec);

    return 0;
}