I've had the same problems. The problem is with the bool field. Code restoring the archive crashes if the bool stored in the archive is not equal to 0 or 1. But since you did not write a constructor in the Obj class, the boolean will actually be initialized with anything( eg, read 14675002 for example), and will be serialized that way in the archive since it seems the serialization code does not check if the bool is equal to 0 or 1 (only the restoration code).

So, the solution is to initialize your boolean correctly and be very careful whenever you use booleans. However, I think the Serialization code should be fixed (remove the check for 0 or 1, it probably does more bad than good.

Jean-Noël

De : boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] De la part de Pavlo Korzhyk
Envoyé : jeudi 26 octobre 2006 16:09
À : boost-users@lists.boost.org
Objet : [Boost-users] [boost.serialization] serialization crash

The following code crashes under cygwin+boost1.33 and under mingw+boost1.33

I create text archive in a file, and then serialization crashes when restoring object from that archive.
The problem seem to be with bool field, if I replace
    bool x;
with
    int x;
in the class Obj implementation, everything runs fine.

Is this a bug in serialization code?

#include <iostream>
#include <sstream>
#include <fstream>
#include <vector>
#include <map>
using namespace std;

#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/serialization/vector.hpp>
#include <boost/serialization/map.hpp>

using namespace boost;
using namespace boost::serialization;

class Obj {
    friend class boost::serialization::access;
    template<class Archive>
    void serialize(Archive & ar, const unsigned int version)
    {
        ar & x;
    }
public:
    bool x;
};

class Item;

class Cheq : public Obj{
    friend class boost::serialization::access;
    template<class Archive>
    void serialize(Archive & ar, const unsigned int version)
    {
        ar & boost::serialization::base_object<Obj>(*this);
        ar & v;
        ar & id;
    }

public:
    vector<Item> v;
    int id;

    Cheq(){}
};

class Item{
    friend class boost::serialization::access;
    template<class Archive>
    void serialize(Archive & ar, const unsigned int version)
    {
        ar & a;
        ar & s;
    }
public:
    int a;
    string s;
};

class Row{
    friend class boost::serialization::access;
    template<class Archive>
    void serialize(Archive & ar, const unsigned int version)
    {
        ar & m1;
        ar & m2;
    }
public:
    map<string,string> m1,m2;
};

class Data{
    friend class boost::serialization::access;
    template<class Archive>
    void serialize(Archive & ar, const unsigned int version)
    {
        ar & a;
        ar & m;
        ar & cheque;
    }

public:
    int a;
    map<string,string> m;
    map<int,Cheq> cheque;
};

BOOST_CLASS_TRACKING(Data, boost::serialization::track_never)

#include "boost/serialization/export.hpp"
BOOST_CLASS_EXPORT(Data);
BOOST_CLASS_EXPORT(Cheq);
BOOST_CLASS_EXPORT(Item);

int main(int argc, char** argv)
{
    Data d;
    d.cheque[0]=Cheq();

    //if(argc>1 && argv[1][0]=='1')
    {
        ofstream os("datfile");
        boost::archive::text_oarchive oar(os);
        oar << d;
    }

    //if(argc>1 && argv[1][0]=='2')
    {
        ifstream is("datfile");
        boost::archive::text_iarchive iar(is);
        iar >> d;
    }
    cout << "without crash\n";
    return 0;
}

--
WBR, Pavlo Korzhyk
ICQ#155870780