Ticket #7498: test_binary_archive_with_map.cpp

// Testcase: test_binary_archive_with_map

// This Win32-specific test creates a std::map from strings to strings and
// then serializes it to a file. We then attempt to desearialize from that
// file. On boost_1_45_0 and boost_1_51_0 for Win32 this testcase fails on
// our company's secondary build machine.

// The call stack is below the code, along with details of the failure

#include <string>
#include <fstream>
#include <map>

#ifdef _WIN32
#pragma warning(disable:4244)
#else
#warning "This testcase affects MSVC boosts; I can't reproduce it on anything else"
#endif

#include "boost/serialization/serialization.hpp"
#include "boost/serialization/map.hpp"
#include "boost/archive/binary_iarchive.hpp"
#include "boost/archive/binary_oarchive.hpp"

int main() {
        std::map<std::string, std::string> m1, m2;
        std::string generator = "abcdefghijklmnopqrstuvwxyz";
        for (std::string::size_type i = 0; i < generator.size(); ++i) {
                m1[&generator[i]] = &generator[i];
        }
        std::ofstream ofs;
        std::ifstream ifs;
        {
                ofs.open("test.cache");
                boost::archive::binary_oarchive oarch(ofs);
                oarch << m1;
                // To ensure the buffers are empty when we re-open the file, and
                // that file locks are released
                ofs.flush();
                ofs.close();
        }
        {
                ifs.open("test.cache");
                boost::archive::binary_iarchive iarch(ifs);
                iarch >> m2;
        }
        assert(m1 == m2);
    return 0;
}

/* Failure details:
At the top of the call stack,
    std::streamsize s = static_cast<std::streamsize>(count / sizeof(Elem));
    std::streamsize scount = m_sb.sgetn(
        static_cast<Elem *>(address), 
        s
    );
    if(scount != s)
        boost::serialization::throw_exception(
            archive_exception(archive_exception::input_stream_error)
        );
`scount` is 0, `s` is 8. It's trying to load a size_type, presumably for a string length or a map length.

m2 is empty when this exception is thrown, but it isn't always empty. Previous executions of this test
actually left data in m2, but that was with std::wstrings and not std::strings.
*/

/* Call stack:
>       test_binary_archive_with_map.exe!boost::serialization::throw_exception<boost::archive::archive_exception>(const boost::archive::archive_exception & e)  Line 37 C++
        test_binary_archive_with_map.exe!boost::archive::basic_binary_iprimitive<boost::archive::binary_iarchive,char,std::char_traits<char> >::load_binary(void * address, unsigned __int64 count)  Line 166 + 0x42 bytes      C++
        test_binary_archive_with_map.exe!boost::archive::basic_binary_iprimitive<boost::archive::binary_iarchive,char,std::char_traits<char> >::load<boost::serialization::collection_size_type>(boost::serialization::collection_size_type & t)  Line 89       C++
        test_binary_archive_with_map.exe!boost::archive::load_access::load_primitive<boost::archive::binary_iarchive,boost::serialization::collection_size_type>(boost::archive::binary_iarchive & ar, boost::serialization::collection_size_type & t)  Line 108        C++
        test_binary_archive_with_map.exe!boost::archive::detail::load_non_pointer_type<boost::archive::binary_iarchive>::load_primitive::invoke<boost::serialization::collection_size_type>(boost::archive::binary_iarchive & ar, boost::serialization::collection_size_type & t)  Line 363     C++
        test_binary_archive_with_map.exe!boost::archive::detail::load_non_pointer_type<boost::archive::binary_iarchive>::invoke<boost::serialization::collection_size_type>(boost::archive::binary_iarchive & ar, boost::serialization::collection_size_type & t)  Line 440     C++
        test_binary_archive_with_map.exe!boost::archive::load<boost::archive::binary_iarchive,boost::serialization::collection_size_type>(boost::archive::binary_iarchive & ar, boost::serialization::collection_size_type & t)  Line 593       C++
        test_binary_archive_with_map.exe!boost::archive::detail::common_iarchive<boost::archive::binary_iarchive>::load_override<boost::serialization::collection_size_type>(boost::serialization::collection_size_type & t, int __formal)  Line 67     C++
        test_binary_archive_with_map.exe!boost::archive::basic_binary_iarchive<boost::archive::binary_iarchive>::load_override(boost::serialization::collection_size_type & t, int version)  Line 196   C++
        test_binary_archive_with_map.exe!boost::archive::binary_iarchive_impl<boost::archive::binary_iarchive,char,std::char_traits<char> >::load_override<boost::serialization::collection_size_type>(boost::serialization::collection_size_type & t, int __formal)  Line 51   C++
        test_binary_archive_with_map.exe!boost::archive::detail::interface_iarchive<boost::archive::binary_iarchive>::operator>><boost::serialization::collection_size_type>(boost::serialization::collection_size_type & t)  Line 61   C++
        test_binary_archive_with_map.exe!boost::serialization::nvp<boost::serialization::collection_size_type>::load<boost::archive::binary_iarchive>(boost::archive::binary_iarchive & ar, const unsigned int __formal)  Line 88       C++
        test_binary_archive_with_map.exe!boost::serialization::access::member_load<boost::archive::binary_iarchive,boost::serialization::nvp<boost::serialization::collection_size_type> >(boost::archive::binary_iarchive & ar, boost::serialization::nvp<boost::serialization::collection_size_type> & t, const unsigned int file_version)  Line 102  C++
        test_binary_archive_with_map.exe!boost::serialization::detail::member_loader<boost::archive::binary_iarchive,boost::serialization::nvp<boost::serialization::collection_size_type> >::invoke(boost::archive::binary_iarchive & ar, boost::serialization::nvp<boost::serialization::collection_size_type> & t, const unsigned int file_version)  Line 55 C++
        test_binary_archive_with_map.exe!boost::serialization::split_member<boost::archive::binary_iarchive,boost::serialization::nvp<boost::serialization::collection_size_type> >(boost::archive::binary_iarchive & ar, boost::serialization::nvp<boost::serialization::collection_size_type> & t, const unsigned int file_version)  Line 70  C++
        test_binary_archive_with_map.exe!boost::serialization::nvp<boost::serialization::collection_size_type>::serialize<boost::archive::binary_iarchive>(boost::archive::binary_iarchive & ar, const unsigned int file_version)  Line 89 + 0x3c bytes C++
        test_binary_archive_with_map.exe!boost::serialization::access::serialize<boost::archive::binary_iarchive,boost::serialization::nvp<boost::serialization::collection_size_type> >(boost::archive::binary_iarchive & ar, boost::serialization::nvp<boost::serialization::collection_size_type> & t, const unsigned int file_version)  Line 119    C++
        test_binary_archive_with_map.exe!boost::serialization::serialize<boost::archive::binary_iarchive,boost::serialization::nvp<boost::serialization::collection_size_type> >(boost::archive::binary_iarchive & ar, boost::serialization::nvp<boost::serialization::collection_size_type> & t, const unsigned int file_version)  Line 70     C++
        test_binary_archive_with_map.exe!boost::serialization::serialize_adl<boost::archive::binary_iarchive,boost::serialization::nvp<boost::serialization::collection_size_type> >(boost::archive::binary_iarchive & ar, boost::serialization::nvp<boost::serialization::collection_size_type> & t, const unsigned int file_version)  Line 132        C++
        test_binary_archive_with_map.exe!boost::archive::detail::load_non_pointer_type<boost::archive::binary_iarchive>::load_only::invoke<boost::serialization::nvp<boost::serialization::collection_size_type> >(boost::archive::binary_iarchive & ar, const boost::serialization::nvp<boost::serialization::collection_size_type> & t)  Line 378     C++
        test_binary_archive_with_map.exe!boost::archive::detail::load_non_pointer_type<boost::archive::binary_iarchive>::invoke<boost::serialization::nvp<boost::serialization::collection_size_type> const >(boost::archive::binary_iarchive & ar, const boost::serialization::nvp<boost::serialization::collection_size_type> & t)  Line 440  C++
        test_binary_archive_with_map.exe!boost::archive::load<boost::archive::binary_iarchive,boost::serialization::nvp<boost::serialization::collection_size_type> const >(boost::archive::binary_iarchive & ar, const boost::serialization::nvp<boost::serialization::collection_size_type> & t)  Line 593    C++
        test_binary_archive_with_map.exe!boost::archive::detail::common_iarchive<boost::archive::binary_iarchive>::load_override<boost::serialization::nvp<boost::serialization::collection_size_type> const >(const boost::serialization::nvp<boost::serialization::collection_size_type> & t, int __formal)  Line 67  C++
        test_binary_archive_with_map.exe!boost::archive::basic_binary_iarchive<boost::archive::binary_iarchive>::load_override<boost::serialization::nvp<boost::serialization::collection_size_type> const >(const boost::serialization::nvp<boost::serialization::collection_size_type> & t, int version)  Line 71     C++
        test_binary_archive_with_map.exe!boost::archive::binary_iarchive_impl<boost::archive::binary_iarchive,char,std::char_traits<char> >::load_override<boost::serialization::nvp<boost::serialization::collection_size_type> const >(const boost::serialization::nvp<boost::serialization::collection_size_type> & t, int __formal)  Line 51        C++
        test_binary_archive_with_map.exe!boost::archive::detail::interface_iarchive<boost::archive::binary_iarchive>::operator>><boost::serialization::nvp<boost::serialization::collection_size_type> const >(const boost::serialization::nvp<boost::serialization::collection_size_type> & t)  Line 61        C++
        test_binary_archive_with_map.exe!boost::serialization::stl::load_collection<boost::archive::binary_iarchive,std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > >,boost::serialization::stl::archive_input_map<boost::archive::binary_iarchive,std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >,boost::serialization::stl::no_reserve_imp<std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > > >(boost::archive::binary_iarchive & ar, std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & s)  Line 148   C++
        test_binary_archive_with_map.exe!boost::serialization::load<boost::archive::binary_iarchive,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > >(boost::archive::binary_iarchive & ar, std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t, const unsigned int __formal)  Line 60     C++
        test_binary_archive_with_map.exe!boost::serialization::free_loader<boost::archive::binary_iarchive,std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >::invoke(boost::archive::binary_iarchive & ar, std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t, const unsigned int file_version)  Line 59       C++
        test_binary_archive_with_map.exe!boost::serialization::split_free<boost::archive::binary_iarchive,std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >(boost::archive::binary_iarchive & ar, std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t, const unsigned int file_version)  Line 75        C++
        test_binary_archive_with_map.exe!boost::serialization::serialize<boost::archive::binary_iarchive,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > >(boost::archive::binary_iarchive & ar, std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t, const unsigned int file_version)  Line 71    C++
        test_binary_archive_with_map.exe!boost::serialization::serialize_adl<boost::archive::binary_iarchive,std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >(boost::archive::binary_iarchive & ar, std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t, const unsigned int file_version)  Line 132    C++
        test_binary_archive_with_map.exe!boost::archive::detail::iserializer<boost::archive::binary_iarchive,std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >::load_object_data(boost::archive::detail::basic_iarchive & ar, void * x, const unsigned int file_version)  Line 193  C++
        test_binary_archive_with_map.exe!boost::archive::detail::basic_iarchive_impl::load_object(boost::archive::detail::basic_iarchive & ar, void * t, const boost::archive::detail::basic_iserializer & bis)  Line 395       C++
        test_binary_archive_with_map.exe!boost::archive::detail::basic_iarchive::load_object(void * t, const boost::archive::detail::basic_iserializer & bis)  Line 538 C++
        test_binary_archive_with_map.exe!boost::archive::detail::load_non_pointer_type<boost::archive::binary_iarchive>::load_standard::invoke<std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >(boost::archive::binary_iarchive & ar, const std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t)  Line 393     C++
        test_binary_archive_with_map.exe!boost::archive::detail::load_non_pointer_type<boost::archive::binary_iarchive>::invoke<std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >(boost::archive::binary_iarchive & ar, std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t)  Line 440  C++
        test_binary_archive_with_map.exe!boost::archive::load<boost::archive::binary_iarchive,std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >(boost::archive::binary_iarchive & ar, std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t)  Line 593    C++
        test_binary_archive_with_map.exe!boost::archive::detail::common_iarchive<boost::archive::binary_iarchive>::load_override<std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >(std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t, int __formal)  Line 67  C++
        test_binary_archive_with_map.exe!boost::archive::basic_binary_iarchive<boost::archive::binary_iarchive>::load_override<std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >(std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t, int version)  Line 71     C++
        test_binary_archive_with_map.exe!boost::archive::binary_iarchive_impl<boost::archive::binary_iarchive,char,std::char_traits<char> >::load_override<std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >(std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t, int __formal)  Line 51        C++
        test_binary_archive_with_map.exe!boost::archive::detail::interface_iarchive<boost::archive::binary_iarchive>::operator>><std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > >(std::map<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > > & t)  Line 61        C++
        test_binary_archive_with_map.exe!main()  Line 37 + 0x15 bytes   C++
        test_binary_archive_with_map.exe!__tmainCRTStartup()  Line 555 + 0x19 bytes     C
        test_binary_archive_with_map.exe!mainCRTStartup()  Line 371     C
        kernel32.dll!BaseThreadInitThunk()  + 0xd bytes 
        ntdll.dll!RtlUserThreadStart()  + 0x21 bytes    
*/