https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92551
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |WAITING Last reconfirmed| |2019-11-18 Ever confirmed|0 |1 --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Darrell Wright from comment #0) > I accidently produced this invalid code and it worked as intended until I > tested further. However, the integer_sequence should never have been deduced > https://gcc.godbolt.org/z/hp4crn > > This will return 20, but should be an error Why? It looks deducable to me.