#0  std::_Rb_tree<unsigned int, std::pair<unsigned int const, Player*>, std::_Select1st<std::pair<unsigned int const, Player*> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, Player*> > >::_M_lower_bound (this=0xe9f7198, __x=0x44, __y=0xe9f71a0, __k=<value optimized out>)
    at /usr/include/c++/4.4/bits/stl_tree.h:986
986             if (!_M_impl._M_key_compare(_S_key(__x), __k))
(gdb) bt
#0  std::_Rb_tree<unsigned int, std::pair<unsigned int const, Player*>, std::_Select1st<std::pair<unsigned int const, Player*> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, Player*> > >::_M_lower_bound (this=0xe9f7198, __x=0x44, __y=0xe9f71a0, __k=<value optimized out>)
    at /usr/include/c++/4.4/bits/stl_tree.h:986
#1  0x0000000000439ae8 in std::_Rb_tree<unsigned int, std::pair<unsigned int const, Player*>, std::_Select1st<std::pair<unsigned int const, Player*> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, Player*> > >::find (this=0xe9f7198, __k=@0x7fd93615296c)
    at /usr/include/c++/4.4/bits/stl_tree.h:1421
#2  0x0000000000430bea in std::map<unsigned int, Player*, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, Player*> > >::find (
    this=0xe9f7160, player=0x14223500) at /usr/include/c++/4.4/bits/stl_map.h:659
#3  ChatChannel::removeUser (this=0xe9f7160, player=0x14223500) at chat.cpp:373
#4  0x0000000000430e6a in Chat::removeUserFromAllChannels (this=0x8e6120, player=0x14223500) at chat.cpp:806
#5  0x00000000005a049a in Player::onCreatureDisappear (this=0x14223500, creature=0x14223500, isLogout=false) at player.cpp:1515
#6  0x0000000000496b2b in Game::removeCreature (this=<value optimized out>, creature=0x14223500, isLogout=false) at game.cpp:951
#7  0x00000000005a20b5 in Player::onDeath (this=<value optimized out>) at player.cpp:2272
#8  0x000000000049a865 in Game::checkCreatures (this=0x8e5b00) at game.cpp:4166
#9  0x00000000004b18fe in boost::_mfi::mf0<void, Game>::operator() (function_obj_ptr=<value optimized out>)
    at /usr/include/boost/bind/mem_fn_template.hpp:49
#10 operator()<boost::_mfi::mf0<void, Game>, boost::_bi::list0> (function_obj_ptr=<value optimized out>) at /usr/include/boost/bind/bind.hpp:246
#11 boost::_bi::bind_t<void, boost::_mfi::mf0<void, Game>, boost::_bi::list1<boost::_bi::value<Game*> > >::operator() (
    function_obj_ptr=<value optimized out>) at /usr/include/boost/bind/bind_template.hpp:20
#12 boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, Game>, boost::_bi::list1<boost::_bi::value<Game*> > >, void>::invoke (function_obj_ptr=<value optimized out>) at /usr/include/boost/function/function_template.hpp:153
#13 0x000000000060f837 in Task::operator()() ()
#14 0x000000000060ecdb in Dispatcher::dispatcherThread (p=<value optimized out>) at tasks.cpp:73
#15 0x00000000005e4682 in operator()<void (*)(void*), boost::_bi::list0> (this=0xe9f71a0) at /usr/include/boost/bind/bind.hpp:246
#16 boost::_bi::bind_t<void, void (*)(void*), boost::_bi::list1<boost::_bi::value<void*> > >::operator() (this=0xe9f71a0)
    at /usr/include/boost/bind/bind_template.hpp:20
#17 boost::detail::thread_data<boost::_bi::bind_t<void, void (*)(void*), boost::_bi::list1<boost::_bi::value<void*> > > >::run (this=0xe9f71a0)
    at /usr/include/boost/thread/detail/thread.hpp:56