Is `std::array

Consider the code below:

#include <array>

struct T
{
    T() = delete;
};

int main()
{
    std::array<T, 0> a;
    a.size();
}

We default initialize a 0-sized array. Since there's no elements, no constructor of T should be called.

However, Clang still requires T to be default constructible, while GCC accepts the code above.

Note that if we change the array initialization to:

std::array<T, 0> a{};

Clang accepts it this time.

Does non-default-constructible T prevent std::array<T, 0> from being default-constructible?