[Bug c++/55120] Inaccessible virtual base constructor does not prevent generation of default constructor

[redi at gcc dot gnu.org]

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.