[Bug c++/71965] [6/7 regression] [concepts] Substitution error *after* failure to satisfy an earlier constraint

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71965

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> Hm?
>
> same sorry with GCC 6.2 for me.

The r238558 change has been backported to 6.x branch in r238577.