http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48859
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-05-04 12:33:38 UTC --- (In reply to comment #0) > > The workaround, of course, is to define the empty default constructor in > ConstMember. Or simply add an empty new-initializer, which works when you can't change the definition of ConstMember