[Boost-users] [Boost][Serialization] Possible Bug in Optional.hpp

22 Aug 2007

      I've downloaded recently the version Boost 1.34.1 and performed some
tests on ours applications integrating Boost components. 

During theses tests, I've tried to deserialize some XML archives
generated w/ Boost 1.33.1 including some boost::optional<> instances and
I've observed that the Visual C++ 7.1 IDE emits run-time checks in the
load<boost::optional<>>()  @ line 60 in file
boost/serialization/optional.hpp.

template<class Archive, class T>
void load(
    Archive & ar, 
    boost::optional<T> & t, 
    const unsigned int /*version*/
){
    bool tflag;
    ar >> boost::serialization::make_nvp("initialized", tflag);
    if (tflag){
        unsigned int v;
        if(3 < ar.get_library_version()){
            ar >> make_nvp("item_version", v);
        }
        detail::stack_construct<Archive, T> aux(ar, v);             
                   ^^^^^^^^^^^^^^^^^^^^^^^^
Here Run-Time Check Failure #3 - The variable 'v' is being used without
being defined.

        ar >> boost::serialization::make_nvp("value", aux.reference());
        t.reset(aux.reference());
    }
    else {
        t.reset();
    }
}

Is it possible to avoid this run-time check by a preinitialisation of
the local variable "v"? Is it a Bug? 

Best regards,

Used Configurations:
Windows XP
         Boost 1.34.1 (through Boost Installer w/ DLL libraries)

Marc Viala