Hello, Just installed Boost and Visual Studio 2017 a few days ago. Here is a bug when building with Hana's "basic_tuple.hpp" header with Visual Studio 2017: In basic_tuple.hpp: template <> struct drop_front_impl { template static constexpr auto drop_front_helper(Xs&& xs, std::index_sequence) { return hana::make_basic_tuple( detail::ebo_get>(static_cast(xs))... ); } template static constexpr auto apply(Xs&& xs, N const&) { constexpr std::size_t len = detail::decay<Xs>::type::size_; return drop_front_helper(static_cast(xs), std::make_index_sequence< N::value < len ? len - N::value : 0 >{}); // struct drop_front_impl { ... template static constexpr auto apply(string const& s, N const&) { return helper(s, std::make_index_sequence< N::value < sizeof...(xs) ? sizeof...(xs) - N::value : 0 >{}); //