https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94489
--- Comment #5 from Patrick Palka <ppalka at gcc dot gnu.org> ---
If we change std::plus<void> to std::plus<void>{} in order to make the testcase
valid, then we accept ever since the PR94490 fix.
The comment #4 testcase can be further reduced to:
template<int...> struct A;
template<int... Ns> A<__integer_pack(Ns)...>* f();
int main() {
f<5, 6>();
}
This seems invalid indeed, how should we even expand __integer_pack(Ns)... when
Ns itself is a pack?
