Invalid code in user<T>::push

[GitSparTV]

sol2/include/sol/stack_push.hpp

Lines 691 to 694 in c1f95a7

	if constexpr (std::is_same_v<meta::unqualified_t<Arg>, metatable_key_t>) {
	const auto name = &arg[0];
	return push_with<true>(L, name, std::forward<Args>(args)...);
	}

This code will not compile because metatable_key_t doesn't have subscript method.