https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101603 Bug 101603 depends on bug 58040, which changed state.
Bug 58040 Summary: Cannot take address-of public using-declaration of member from protected base class https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58040 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |INVALID
