https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99103
Patrick Palka <ppalka at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ppalka at gcc dot gnu.org Ever confirmed|0 |1 Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2021-02-15 Assignee|unassigned at gcc dot gnu.org |ppalka at gcc dot gnu.org --- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> --- Thanks for the bug report, confirmed. We can trigger the bug without the variadic template: const std::vector<int> v; std::vector w{v}; static_assert(std::is_same_v<decltype(w), std::vector<int>>); // fails Investigating.