[Boost-users] Assertion `__null != bpos' failed in /inclu de/boost/archive/detail/oserializer.hpp:436

Subject: [Boost-users] Assertion `__null != bpos' failed in /inclu de/boost/archive/detail/oserializer.hpp:436
From: ktomaszewski_at_[hidden]
Date: 2011-01-20 14:43:05

I'm using Boost v. 1.44 on Linux and gcc version 4.4.1 (Ubuntu 4.4.1-4ubuntu9)

I'm trying to serialize derived class object through base class shared-pointer. After reading tons of documentation from www.boost.org and checking all posible solutions (with macros) I turned to the simplest one which still doesn't work.

1) I register derived class with the archive by the code:

ar.register_type((PrefsMachineHash*)0);   // PrefsMachineHash is a class derived from AHash class

2) I try to serialize boost::shared_ptr<AHash> object by the code:

ar & ptr;   // ptr is of type: boost::shared_ptr<AHash>

After
 all, the assert (oserializer.hpp:436, assert(NULL != bpos)) triggers. The stack-trace is below. What is really weird
 is that on the small example everything works correctly. How is this 
possible? AFTER 7 HOURS I GAVE UP. ANY HELP, please?

----
Small example that works:

namespace X {

class A {
    int x;
public:
    virtual ~A() { }
    
    template<class Archive>
    void serialize(Archive & ar, const unsigned int /*version*/) {
        ar & x;
    }
};

class B : public A {
public:
    template<class Archive>
    void serialize(Archive & ar, const unsigned int /*version*/) {
        ar & boost::serialization::base_object<A>(*this);
    }    
};

}//namespace

int main() {
    try {
        boost::shared_ptr<X::A> ptr(new X::B);
        
        std::ostringstream os;
        Borg::SafeBinOutArchive ar(os);
        ar.register_type((X::B*)0);
        ar & ptr;
    }
    catch(std::exception& e) {
        cout << "Err: " << e.what() << endl;
    }
    return 0;
}

----
BACK-TRACE from my project:

tuiD:
 /usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:436:
 static void 
boost::archive::detail::save_pointer_type<Archive>::polymorphic::save(Archive&,
 T&) [with T = Borg::AHash, Archive = Borg::SafeBinOutArchive]: 
Assertion `__null != bpos' failed.

Program received signal SIGABRT, Aborted.
0xb7fe2430 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7fe2430 in __kernel_vsyscall ()
#1  0xb7d5d4d1 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0xb7d60932 in *__GI_abort () at abort.c:92
#3 
 0xb7d56648 in *__GI___assert_fail (assertion=0x91e8811 "__null != 
bpos", file=0x91e8790 
"/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp", 
line=436, 
    function=0x91eca20 "static void 
boost::archive::detail::save_pointer_type<Archive>::polymorphic::save(Archive&,
 T&) [with T = Borg::AHash, Archive = Borg::SafeBinOutArchive]") at 
assert.c:81
#4  0x08d93165 in 
boost::archive::detail::save_pointer_type<Borg::SafeBinOutArchive>::polymorphic::save<Borg::AHash>
 (ar=..., t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:436
#5 
 0x08d92c7d in 
boost::archive::detail::save_pointer_type<Borg::SafeBinOutArchive>::save<Borg::AHash>
 (ar=..., t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:460
#6 
 0x08d92b00 in 
boost::archive::detail::save_pointer_type<Borg::SafeBinOutArchive>::invoke<Borg::AHash
 const*> (ar=..., t=0x95868c0) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:473
#7 
 0x08d92845 in boost::archive::save<Borg::SafeBinOutArchive, 
Borg::AHash const* const> (ar=..., t=@0xbfffe2bc) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:525
#8 
 0x08d92794 in 
boost::archive::detail::common_oarchive<Borg::SafeBinOutArchive>::save_override<Borg::AHash
 const* const> (this=0xbfffe904, t=@0xbfffe2bc) at 
/usr/local/boost/1.44/include/boost/archive/detail/common_oarchive.hpp:69
#9 
 0x08d926c7 in 
boost::archive::basic_binary_oarchive<Borg::SafeBinOutArchive>::save_override<Borg::AHash
 const*> (this=0xbfffe904, t=@0xbfffe2bc, version=0) at 
/usr/local/boost/1.44/include/boost/archive/basic_binary_oarchive.hpp:74
#10
 0x08d925fc in 
boost::archive::binary_oarchive_impl<Borg::SafeBinOutArchive, char, 
std::char_traits<char> >::save_override<Borg::AHash const* 
const> (this=0xbfffe904, t=@0xbfffe2bc) at 
/usr/local/boost/1.44/include/boost/archive/binary_oarchive_impl.hpp:51
#11
 0x08d92524 in 
boost::archive::detail::interface_oarchive<Borg::SafeBinOutArchive>::operator<<
 <Borg::AHash const* const> (this=0xbfffe904, t=@0xbfffe2bc) at 
/usr/local/boost/1.44/include/boost/archive/detail/interface_oarchive.hpp:63
#12
 0x08d923bc in boost::serialization::nvp<Borg::AHash 
const*>::save<Borg::SafeBinOutArchive> (this=0xbfffe2b4, 
ar=...) at /usr/local/boost/1.44/include/boost/serialization/nvp.hpp:79
#13
 0x08d922ef in 
boost::serialization::access::member_save<Borg::SafeBinOutArchive, 
boost::serialization::nvp<Borg::AHash const*> const> (ar=..., 
t=..., file_version=0) at 
/usr/local/boost/1.44/include/boost/serialization/access.hpp:93
#14 
0x08d92229 in 
boost::serialization::detail::member_saver<Borg::SafeBinOutArchive, 
boost::serialization::nvp<Borg::AHash const*> >::invoke 
(ar=..., t=..., file_version=0) at 
/usr/local/boost/1.44/include/boost/serialization/split_member.hpp:43
#15
 0x08d92163 in 
boost::serialization::split_member<Borg::SafeBinOutArchive, 
boost::serialization::nvp<Borg::AHash const*> > (ar=..., t=...,
 file_version=0) at 
/usr/local/boost/1.44/include/boost/serialization/split_member.hpp:69
#16
 0x08d9209d in boost::serialization::nvp<Borg::AHash 
const*>::serialize<Borg::SafeBinOutArchive> (this=0xbfffe2b4, 
ar=..., file_version=0) at 
/usr/local/boost/1.44/include/boost/serialization/nvp.hpp:89
#17 
0x08d91fc6 in 
boost::serialization::access::serialize<Borg::SafeBinOutArchive, 
boost::serialization::nvp<Borg::AHash const*> > (ar=..., t=...,
 file_version=0) at 
/usr/local/boost/1.44/include/boost/serialization/access.hpp:118
#18 
0x08d91edd in 
boost::serialization::serialize<Borg::SafeBinOutArchive, 
boost::serialization::nvp<Borg::AHash const*> > (ar=..., t=...,
 file_version=0) at 
/usr/local/boost/1.44/include/boost/serialization/serialization.hpp:70
#19
 0x08d91df6 in 
boost::serialization::serialize_adl<Borg::SafeBinOutArchive, 
boost::serialization::nvp<Borg::AHash const*> > (ar=..., t=...,
 file_version=0) at 
/usr/local/boost/1.44/include/boost/serialization/serialization.hpp:129
#20
 0x08d91c67 in 
boost::archive::detail::save_non_pointer_type<Borg::SafeBinOutArchive>::save_only::invoke<boost::serialization::nvp<Borg::AHash
 const*> > (ar=..., t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:241
#21
 0x08d91b57 in 
boost::archive::detail::save_non_pointer_type<Borg::SafeBinOutArchive>::invoke<boost::serialization::nvp<Borg::AHash
 const*> > (ar=..., t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:308
#22
 0x08d91a5d in boost::archive::save<Borg::SafeBinOutArchive, 
boost::serialization::nvp<Borg::AHash const*> const> (ar=..., 
t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:525
#23
 0x08d9194c in 
boost::archive::detail::common_oarchive<Borg::SafeBinOutArchive>::save_override<boost::serialization::nvp<Borg::AHash
 const*> const> (this=0xbfffe904, t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/common_oarchive.hpp:69
#24
 0x08d917f1 in 
boost::archive::basic_binary_oarchive<Borg::SafeBinOutArchive>::save_override<boost::serialization::nvp<Borg::AHash
 const*> > (this=0xbfffe904, t=..., version=0) at 
/usr/local/boost/1.44/include/boost/archive/basic_binary_oarchive.hpp:74
#25
 0x08d91676 in 
boost::archive::binary_oarchive_impl<Borg::SafeBinOutArchive, char, 
std::char_traits<char> 
>::save_override<boost::serialization::nvp<Borg::AHash 
const*> const> (this=0xbfffe904, t=...)
    at /usr/local/boost/1.44/include/boost/archive/binary_oarchive_impl.hpp:51
#26
 0x08d91358 in 
boost::archive::detail::interface_oarchive<Borg::SafeBinOutArchive>::operator<<
 <boost::serialization::nvp<Borg::AHash const*> const> 
(this=0xbfffe904, t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/interface_oarchive.hpp:63
#27
 0x08d90fcb in boost::serialization::save<Borg::SafeBinOutArchive, 
Borg::AHash> (ar=..., t=...) at 
/usr/local/boost/1.44/include/boost/serialization/shared_ptr.hpp:107
#28
 0x08d90ddb in 
boost::serialization::free_saver<Borg::SafeBinOutArchive, 
boost::shared_ptr<Borg::AHash> >::invoke (ar=..., t=..., 
file_version=1) at 
/usr/local/boost/1.44/include/boost/serialization/split_free.hpp:45
#29
 0x08d90a17 in 
boost::serialization::split_free<Borg::SafeBinOutArchive, 
boost::shared_ptr<Borg::AHash> > (ar=..., t=..., 
file_version=1) at 
/usr/local/boost/1.44/include/boost/serialization/split_free.hpp:74
#30
 0x08d90890 in 
boost::serialization::serialize<Borg::SafeBinOutArchive, 
Borg::AHash> (ar=..., t=..., file_version=1) at 
/usr/local/boost/1.44/include/boost/serialization/shared_ptr.hpp:171
#31
 0x08d905c3 in 
boost::serialization::serialize_adl<Borg::SafeBinOutArchive, 
boost::shared_ptr<Borg::AHash> > (ar=..., t=..., 
file_version=1) at 
/usr/local/boost/1.44/include/boost/serialization/serialization.hpp:129
#32
 0x08d90175 in 
boost::archive::detail::oserializer<Borg::SafeBinOutArchive, 
boost::shared_ptr<Borg::AHash> >::save_object_data 
(this=0x94e6b3c, ar=..., x=0x9581a44) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:148
#33
 0x08eda0e3 in boost::archive::detail::basic_oarchive::save_object(void 
const*, boost::archive::detail::basic_oserializer const&) ()
#34 
0x08d8cc22 in 
boost::archive::detail::save_non_pointer_type<Borg::SafeBinOutArchive>::save_standard::invoke<boost::shared_ptr<Borg::AHash>
 > (ar=..., t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:253
#35
 0x08d8ca0f in 
boost::archive::detail::save_non_pointer_type<Borg::SafeBinOutArchive>::invoke<boost::shared_ptr<Borg::AHash>
 > (ar=..., t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:308
#36
 0x08d8c866 in boost::archive::save<Borg::SafeBinOutArchive, 
boost::shared_ptr<Borg::AHash> const> (ar=..., t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:525
#37
 0x08d8c670 in 
boost::archive::detail::common_oarchive<Borg::SafeBinOutArchive>::save_override<boost::shared_ptr<Borg::AHash>
 const> (this=0xbfffe904, t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/common_oarchive.hpp:69
#38
 0x08d8c43d in 
boost::archive::basic_binary_oarchive<Borg::SafeBinOutArchive>::save_override<boost::shared_ptr<Borg::AHash>
 > (this=0xbfffe904, t=..., version=0) at 
/usr/local/boost/1.44/include/boost/archive/basic_binary_oarchive.hpp:74
#39
 0x08d8c18c in 
boost::archive::binary_oarchive_impl<Borg::SafeBinOutArchive, char, 
std::char_traits<char> 
>::save_override<boost::shared_ptr<Borg::AHash> const> 
(this=0xbfffe904, t=...) at 
/usr/local/boost/1.44/include/boost/archive/binary_oarchive_impl.hpp:51
#40
 0x08d8be0e in 
boost::archive::detail::interface_oarchive<Borg::SafeBinOutArchive>::operator<<
 <boost::shared_ptr<Borg::AHash> const> (this=0xbfffe904, 
t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/interface_oarchive.hpp:63
#41
 0x08d8bbc0 in 
boost::archive::detail::interface_oarchive<Borg::SafeBinOutArchive>::operator&<boost::shared_ptr<Borg::AHash>
 > (this=0xbfffe904, t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/interface_oarchive.hpp:71
#42
 0x08d8b88f in Borg::CacheItem::serialize<Borg::SafeBinOutArchive>
 (this=0x9581a40, ar=..., file_version=0) at 
/home/krzysiek/BORG/base/core/engine/users/new_cache.h:374
#43 
0x08d8b699 in 
boost::serialization::access::serialize<Borg::SafeBinOutArchive, 
Borg::CacheItem> (ar=..., t=..., file_version=0) at 
/usr/local/boost/1.44/include/boost/serialization/access.hpp:118
#44 
0x08d8b535 in 
boost::serialization::serialize<Borg::SafeBinOutArchive, 
Borg::CacheItem> (ar=..., t=..., file_version=0) at 
/usr/local/boost/1.44/include/boost/serialization/serialization.hpp:70
#45
 0x08d8b3a6 in 
boost::serialization::serialize_adl<Borg::SafeBinOutArchive, 
Borg::CacheItem> (ar=..., t=..., file_version=0) at 
/usr/local/boost/1.44/include/boost/serialization/serialization.hpp:129
#46
 0x08d8a8db in 
boost::archive::detail::oserializer<Borg::SafeBinOutArchive, 
Borg::CacheItem>::save_object_data (this=0x94e6c94, ar=..., 
x=0x9581a40) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:148
#47
 0x08eda0e3 in boost::archive::detail::basic_oarchive::save_object(void 
const*, boost::archive::detail::basic_oserializer const&) ()
#48 
0x08d87ec6 in 
boost::archive::detail::save_non_pointer_type<Borg::SafeBinOutArchive>::save_standard::invoke<Borg::CacheItem>
 (ar=..., t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:253
#49
 0x08d87d66 in 
boost::archive::detail::save_non_pointer_type<Borg::SafeBinOutArchive>::invoke<Borg::CacheItem>
 (ar=..., t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:308
#50
 0x08d87c42 in boost::archive::save<Borg::SafeBinOutArchive, 
Borg::CacheItem const> (ar=..., t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/oserializer.hpp:525
#51
 0x08d87b4c in 
boost::archive::detail::common_oarchive<Borg::SafeBinOutArchive>::save_override<Borg::CacheItem
 const> (this=0xbfffe904, t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/common_oarchive.hpp:69
#52
 0x08d87901 in 
boost::archive::basic_binary_oarchive<Borg::SafeBinOutArchive>::save_override<Borg::CacheItem>
 (this=0xbfffe904, t=..., version=0) at 
/usr/local/boost/1.44/include/boost/archive/basic_binary_oarchive.hpp:74
#53
 0x08d87292 in 
boost::archive::binary_oarchive_impl<Borg::SafeBinOutArchive, char, 
std::char_traits<char> >::save_override<Borg::CacheItem 
const> (this=0xbfffe904, t=...) at 
/usr/local/boost/1.44/include/boost/archive/binary_oarchive_impl.hpp:51
#54
 0x08d86bdc in 
boost::archive::detail::interface_oarchive<Borg::SafeBinOutArchive>::operator<<
 <Borg::CacheItem const> (this=0xbfffe904, t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/interface_oarchive.hpp:63
#55
 0x08d860f4 in 
boost::archive::detail::interface_oarchive<Borg::SafeBinOutArchive>::operator&<Borg::CacheItem
 const> (this=0xbfffe904, t=...) at 
/usr/local/boost/1.44/include/boost/archive/detail/interface_oarchive.hpp:71
#56
 0x08d80fa6 in Borg::CacheItem::writeTo (this=0x9581a40, ar=...) at 
/home/krzysiek/BORG/base/core/engine/users/new_cache.cpp:304
#57 
0x08da0200 in BdbBoxStorage::store (this=0x956ee30, p_item=...) at 
/home/krzysiek/BORG/base/core/engine/users/berkeleydb/bdb_boxstorage.cpp:323
#58
 0x08d84519 in Borg::Cache::write (this=0x956d038, p_hash=0xbfffed40, 
type=..., data=..., human_desc=..., p_callback=..., timeout_sec=0, 
p_privFSKey=0x0) at 
/home/krzysiek/BORG/base/core/engine/users/new_cache.cpp:716
#59 
0x0855bc3d in CPreferences::exportSaveMachinePrefs (this=0x956c9d0) at 
/home/krzysiek/BORG/base/core/engine/Preferences.cpp:200
#60 0x08506bcc in GlobalData::beforeDestruct (this=0x956c830) at /home/krzysiek/BORG/base/core/engine/borg_global.cpp:131
#61 0x085b2568 in RunMainEngine (argc=1, argv=0xbffff2d4) at /home/krzysiek/BORG/base/core/engine/RunMainEngine.cpp:513
#62 0x084fcaae in main (argc=1, argv=0xbffff2d4) at /home/krzysiek/BORG/base/ui/tui/main.cpp:46