https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88675
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- The C++ standard requires that the first template argument for std::integer_sequence is an integer type, so your code is undefined.