Searched the net, and came to know lot number of cases (missing destructors , missing virtual member definition )which throws this diagnostic message.
Often comes when, a non-inline virtual member function is not given its implementation in derived class. Or when, a constructor is calling a virtual function, and hence cannot go through the vtable.
Though do not know of the side-effects of the workaround, it would help for your sake, if you could examine the possibilities of above mismatches in the code,or get the patch. It might cause side-effect for a few cases.