[Bug c++/64178] rejects-valid on variadic operator++

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64178

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is a bad interaction with an old extension really; one which I thought was
talking about removing.