[Bug c++/102869] [11/12 Regression] Expansion pattern 'std::integer_sequence' contains no parameter packs

[ppalka at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102869

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at gcc dot gnu.org,
                   |                            |ppalka at gcc dot gnu.org

--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Started with r11-7931.  Reduced rejects-valid testcase:


template<int...> struct integer_sequence;

template<int _Num>
using make_index_sequence = integer_sequence<__integer_pack(_Num)...>;

template<class...> struct Tuple;

template<int... Is> using tuple_t = Tuple<make_index_sequence<Is>...>;

template<int... Is>
void f() {
  tuple_t<Is...> t;
}