http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55120
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-10-29 23:12:12 UTC --- I think Johannes is right, the virtual base is default-initialized without needing to look up its name in the scope of D, and the implicitly-defined default constructor is public so accessible. Curious that G++, Comeau and Clang all accept the example in CWG issue 7, despite the rationale (and Mike) indicating it's intended that a virtual private base can't be derived from.
