[Bug c++/102229] [11/12 Regression] 'decltype(auto)' cannot be cv-qualified

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102229

--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This is supposed to be valid, so I'll try to come up with a fix soon.