Баг или фича?

[Stalkert]

#include <vector>

const size_t i = 20;


int main()
{
    //auto p = std::make_pair<void*, size_t>(nullptr, i); // doesn't work
    auto p = std::pair<void*, size_t>(nullptr, i); //works
}

gcc 9.2.0, собираю с -std=c++17

 c++11, c++17, с++