std::__detail::_Default_ranged_hash(3cxx) on Linux
The text 47fd51a1047a, as Debian 9 (Stretch) shipped it.
Default ranged hash function H. In principle it should be a function object composed from objects of type H1 and H2 such that h(k, N) = h2(h1(k), N), but that would mean making extra copies of h1 and h2. So instead we'll just use a tag to tell class template hashtable to do that composition.