#include <boost/archive/polymorphic_text_oarchive.hpp>
#include <boost/serialization/serialization.hpp>
#include <sstream>

using namespace boost;

struct B
{
    virtual ~B()
    {}

    template <typename A>
    void serialize(A &, const unsigned)
    {}
};

struct D : B
{
    template <typename A>
    void serialize(A &a, const unsigned)
    {
        a & serialization::base_object<B>(*this);
    }
};

void
register_type_ambig()
{
    B *bp = new D;

    std::ostringstream ostr;
    archive::polymorphic_text_oarchive oa(ostr);
    oa.register_type<D>();
    oa & bp;

    delete bp;
}