https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115614
Patrick Palka <ppalka at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2025-01-28 Ever confirmed|0 |1 See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=84796 Status|UNCONFIRMED |NEW CC| |ppalka at gcc dot gnu.org --- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> --- Confirmed, never worked. Reduced: template<class, int> concept C = true; template<int...> struct A { }; template<int... Ns, int... Ms> auto f(A<Ns...>, A<Ms...>) { return []<C<Ns>... Us, C<Ms>... Vs>(Us..., Vs...) { }; } int main() { f(A<1,2,3>{}, A<4,5>{})(0, 0, 0, 0, 0); } Maybe related to PR84796