https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110927 Bug 110927 depends on bug 109181, which changed state.
Bug 109181 Summary: requires expression type requirement rejects valid type when it is a nested member template https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109181 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE