https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96355
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Robert Douglas from comment #1) > I've also hit this issue in upgrading from 9.1 to 10.2 > > I presume it run into the same issue, but if it helps, this more closely > matches my use case: > https://godbolt.org/z/zb1bP5 That code: template<typename... Params> concept ParamsRemain = requires(Params) { requires sizeof...(Params) > 0; }; template<typename... Params> void foo() { static constexpr bool pr1 = ParamsRemain<Params...>; }; int main() { foo<>(); return 0; } compiles with GCC 9 and -std=c++2a -fconcepts compiles with GCC 10.1 and -std=c++2a ice-on-valid-code with GCC 10.2.0, 10.2.1 and 11.0 with -std=c++2a
