[Bug c++/68395] [concepts] segfault in valid code

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68395

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
*** Bug 68394 has been marked as a duplicate of this bug. ***