https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37804 Bug 37804 depends on bug 31336, which changed state.
Bug 31336 Summary: template friends and Koenig lookup https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31336 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |DUPLICATE