c++11 array initialization won't call copy constructor

I'm making a little class that uses an array templated on its size. Here's some code...

.hpp

template <size_t N>
class KeyCombinationListener
{
public:
    KeyCombinationListener(
        const std::array<sf::Keyboard::Key, N>& sequence, std::function<void (void)> fn
        );

private:
    std::array<sf::Keyboard::Key, N>  combo;
    std::function<void (void)>  callback;
};

.cc

template <size_t N>
KeyCombinationListener<N>::KeyCombinationListener(
    const array<sf::Keyboard::Key, N>& sequence, function<void (void)> fn
    ) : combo(sequence), progress{begin(combo)}, callback{fn}
{

}

In the member initialization of the constructor, I can't use combo{sequence} as the initializer because it only accepts sf::Keyboard::Key types. This makes sense if it's asking for an initializer_list, but this seems strange to me. With other standard containers I can call a copy constructor using {} notation just fine. Is this a quirk with std::array? Or maybe a bug in my clang?

Just in case it helps, here's my clang version:

Debian clang version 3.5.0-10 (tags/RELEASE_350/final) (based on LLVM 3.5.0)
Target: x86_64-pc-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.2
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Selected multilib: .;@m64