https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 67225, which changed state.
Bug 67225 Summary: [concepts] Expression constraint with a constrained result turns off access checking https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67225 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED