Ticket #12549: serial_crash.cpp

#include <fstream>
#include <cassert>

#include <boost/archive/xml_oarchive.hpp>
#include <boost/archive/xml_iarchive.hpp>

class Father;

class Child {
public:
    Child(Father* f) : father(f) {}
    Child() {}

    Father* father = nullptr;

    template<class Archive>
    void serialize(Archive & ar, const unsigned int version);
};

class Father {
public:
    Child child;
    Father() : child(this) {}

    template<class Archive>
    void serialize(Archive & ar, const unsigned int version);
};

template<class Archive>
void Child::serialize(Archive & ar, const unsigned int version) {
  ar & BOOST_SERIALIZATION_NVP(father);
}

template<class Archive>
void Father::serialize(Archive & ar, const unsigned int version) {
  ar & BOOST_SERIALIZATION_NVP(child);
}

int main() {
    {
        std::ofstream ofs("filename");
        Father* father = new Father();
        Child* child = &father->child;
        boost::archive::xml_oarchive oa(ofs);
        oa << BOOST_SERIALIZATION_NVP(child); // reversing the order of de/serialization prevents the crash
        oa << BOOST_SERIALIZATION_NVP(father);
        assert(child == &father->child);
    }

    {
        Father* father = nullptr;
        Child* child = nullptr;
        std::ifstream ifs("filename");
        boost::archive::xml_iarchive ia(ifs);
        ia >> BOOST_SERIALIZATION_NVP(child);
        ia >> BOOST_SERIALIZATION_NVP(father);
        assert(child == &father->child); // fails
    }
    return 0;
}