[Bug libstdc++/62169] map iterators under _GLIBCXX_DEBUG diverge

[terra at gnome dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62169

--- Comment #3 from M Welinder <terra at gnome dot org> ---
A similar divergence of types occurs between the types

    std::map<int,int>::iterator
    std::multimap<int,int>::iterator