[Bug c++/66758] [concepts] ICE compiler deeply confused by simple-seeming concept definition

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66758

--- Comment #12 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #11)
> Fixed.

in r225710.