Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000000000574718 in ProtocolGame::canSee (this=this@entry=0x7f57f71b9290, c=c@entry=0x7f580c787d50) at /home/blue/src/protocolgame.cpp:1000
1000        return player->canSeeCreature(c) && canSee(c->getPosition());
(gdb) bt full
#0  0x0000000000574718 in ProtocolGame::canSee (this=this@entry=0x7f57f71b9290, c=c@entry=0x7f580c787d50) at /home/blue/src/protocolgame.cpp:1000
No locals.
#1  0x000000000057bea0 in sendPlayerBattleIcon (creature=0x7f580c787d50, this=0x7f57f71b9290) at /home/blue/src/protocolgame.cpp:2651
No locals.
#2  sendPlayerBattleIcon (this=0x7f580c787d50, creature=0x7f580c787d50) at /home/blue/src/player.h:603
        this = 0x7f580c787d50
        creature = 0x7f580c787d50
#3  Duel::disband (this=this@entry=0x7f57f7267eb0) at /home/blue/src/duel.cpp:29
No locals.
#4  0x000000000057c520 in Duel::leave (this=0x7f57f7267eb0, player=player@entry=0x7f58c5f70fc0) at /home/blue/src/duel.cpp:168
No locals.
#5  0x000000000063d6f6 in Player::onCreatureDisappear (this=0x7f58c5f70fc0, creature=0x7f58c5f70fc0, isLogout=<optimized out>) at /home/blue/src/player.cpp:1732
        saved = <optimized out>
#6  0x00000000005617b3 in Game::removeCreature(Creature*, bool) (this=0x920540 <g_game>, creature=creature@entry=0x7f58c5f70fc0, isLogout=isLogout@entry=true)
    at /home/blue/src/game.cpp:1002
        tile = <optimized out>
        list = {<> = {_M_impl = {<> = {<> = {<No data fields>}, <No data fields>}, _M_node = {_M_next = 0x7f58162a05a0, _M_prev = 0x7f580fe9dc70}}}, <No data fields>}
        i = 30
        it = {_M_node = 0x7f58059de3b0}
        player = <optimized out>
        oldStackPosVector = {<> = {_M_impl = {<> = {<> = {<No data fields>}, <No data fields>}, _M_start = 0x7f58cf041300, _M_finish = 0x7f58cf041378,
              _M_end_of_storage = 0x7f58cf041380}}, <No data fields>}
        oldIndex = 1
#7  0x000000000059a9ee in sendPing (this=0x7f58c5f70fc0) at /home/blue/src/player.cpp:1458
        timeNow = <optimized out>
#8  Player::onThink (this=0x7f58c5f70fc0, interval=500) at /home/blue/src/player.cpp:1999
No locals.
#9  0x00000000005c46c3 in Game::checkCreatures() (this=0x920540 <g_game>) at /home/blue/src/game.cpp:4476
        it = {_M_current = 0x7f58bab1b4d8}
        checkCreatureVector = @0x9206d8: {<> = {_M_impl = {<> = {<> = {<No data fields>}, <No data fields>}, _M_start = 0x7f58bab1b320, _M_finish = 0x7f58bab1b6e0,
              _M_end_of_storage = 0x7f58bab1bb20}}, <No data fields>}
#10 0x000000000060dcb0 in operator() (this=0x7f58bfdc6fe0) at /usr/include/boost/function/function_template.hpp:767
No locals.
#11 operator() (this=0x7f58bfdc6fd0) at /home/blue/src/tasks.h:34
        this = 0x7f58bfdc6fd0
#12 Dispatcher::dispatcherThread (p=0x91bc60 <Dispatcher::getInstance()::dispatcher>) at /home/blue/src/tasks.cpp:72
        task = 0x7f58bfdc6fd0
        dispatcher = 0x91bc60 <Dispatcher::getInstance()::dispatcher>
        outputPool = 0x91ba60 <OutputMessagePool::getInstance()::instance>
        taskLockUnique = {m = 0x91bc68 <Dispatcher::getInstance()::dispatcher+8>, is_locked = false}
#13 0x00007f58ee248a4a in ?? () from /usr/lib/x86_64-linux-gnu/libboost_thread.so.1.54.0
No symbol table info available.
#14 0x00007f58edb0a184 in start_thread (arg=0x7f58e9f9e700) at pthread_create.c:312
        __res = <optimized out>
        pd = 0x7f58e9f9e700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140019859318528, 1568474941997244424, 0, 0, 140019859319232, 140019859318528, -1480131397860925432,
                -1480122115955695608}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
---Type <return> to continue, or q <return> to quit---
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#15 0x00007f58ee75503d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.
(gdb)