[Bug c++/58040] Cannot take address-of public using-declaration of member from protected base class

[gcc at mattwhitlock dot name]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58040

--- Comment #5 from Matt Whitlock <gcc at mattwhitlock dot name> ---
FYI, this is still a problem in G++ 5.3.0.