Краш на SaveToDB()

Ревизия: 10105
Ядро: MaNGOS + insider42 + SD2
ACE: enable-builtin-ace
CONF: CFLAGS="-O1 -march=core2 -g -mssse3 -mfpmath=sse" CXXFLAGS="-O1 -march=core2 -g -mssse3 -mfpmath=sse"
OS: 2.6.34-gentoo-r1

Падает в функции Player::_SaveQuestStatus, в строке:

for( QuestStatusMap::iterator i = mQuestStatus.begin( ); i != mQuestStatus.end( ); ++i )

краш-дамп:

#0  0x00007f11a9005276 in std::_Rb_tree_increment(std::_Rb_tree_node_base*) () from /usr/lib/gcc/x86_64-pc-linux-gnu/4.4.4/libstdc++.so.6
(gdb) bt full
#0  0x00007f11a9005276 in std::_Rb_tree_increment(std::_Rb_tree_node_base*) () from /usr/lib/gcc/x86_64-pc-linux-gnu/4.4.4/libstdc++.so.6
No symbol table info available.
#1  0x000000000073551d in std::_Rb_tree_iterator<std::pair<unsigned int const, QuestStatusData> >::operator++ (this=<value optimized out>)
    at /usr/lib/gcc/x86_64-pc-linux-gnu/4.4.4/include/g++-v4/bits/stl_tree.h:184
No locals.
#2  Player::_SaveQuestStatus (this=<value optimized out>) at ../../../src/game/Player.cpp:17385
No locals.
#3  0x0000000000751e67 in Player::SaveToDB (this=0x7f112322d580) at ../../../src/game/Player.cpp:17102
        sql_name = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>},
            _M_p = 0x7f10e55ef5f8 "Кейдзо"}}
        ss = <incomplete type>
#4  0x00000000007560ab in Player::Update (this=0x7f112322d580, p_time=167) at ../../../src/game/Player.cpp:1437
        now = 1277800963
        pet = <value optimized out>
#5  0x00000000006a4165 in Map::Update (this=0x7f118dc297d0, t_diff=@0x7f118b4f6cbc) at ../../../src/game/Map.cpp:517
        plr = 0x7f10ff7e2060
        updater = {i_timeDiff = 692460616}
        grid_object_update = {i_visitor = @0x4c29b203}
        __FUNCTION__ = "Update"
        __PRETTY_FUNCTION__ = "virtual void Map::Update(const uint32&)"
        world_object_update = {i_visitor = @0x7f118b4f6be0}
#6  0x00000000006b287d in MapManager::Update (this=0x7f118dc29680, diff=<value optimized out>) at ../../../src/game/MapManager.cpp:249
        iter = {<std::tr1::__detail::_Hashtable_iterator_base<std::pair<unsigned int const, Map*>, false>> = {_M_cur_node = 0x7f118d98aa10, _M_cur_bucket = 0x2adffd00}, <No data fields>}
#7  0x000000000081c345 in World::Update (this=0x7f11a00237f0, diff=<value optimized out>) at ../../../src/game/World.cpp:1605
No locals.
#8  0x0000000000569965 in WorldRunnable::run (this=<value optimized out>) at ../../../src/mangosd/WorldRunnable.cpp:60
        diff = 167
        realCurrTime = 2195676949
        realPrevTime = <value optimized out>
        prevSleepTime = 0
#9  0x00000000008cb210 in ACE_Based::Thread::ThreadTask (param=0x7f10ff7e2060) at ../../../src/shared/Threading.cpp:187
        _task = 0x12d3920
#10 0x00007f11a92ad914 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#11 0x00007f11a88731dd in clone () from /lib/libc.so.6
No symbol table info available.
(gdb) quit

Объясните мне, как может ЗДЕСЬ возникнуть краш?
Пробовал:
1) Удалил mtmaps полностью
2) Обновил ядро операционной системы, gcc до вресии 4.4.4
3) Обновил glibc и весь софт
Краш происходит достаточно часто с попеременным успехом, может происходить не только на стадии сохранения квестов, но и на стадии сохранения ачивментов