Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xf7012b70 (LWP 26129)]
0xf7e0ada7 in luaH_getstr () from /usr/lib/liblua50.so.5.0
(gdb) where
#0  0xf7e0ada7 in luaH_getstr () from /usr/lib/liblua50.so.5.0
#1  0xf7e0b84a in luaT_gettm () from /usr/lib/liblua50.so.5.0
#2  0xf7e0caae in ?? () from /usr/lib/liblua50.so.5.0
#3  0xf7dff617 in lua_gettable () from /usr/lib/liblua50.so.5.0
#4  0x0810a291 in LuaScript::getGlobalNumber (this=0x8202140, var=...,
    defNum=1) at luascript.cpp:449
#5  0x0810ae4e in MagicEffectClass::getDamage (this=0xf70096e4, target=
    0xa622438, attacker=0xa622438) at magic.cpp:71
#6  0x0808af90 in GameState::onAttack (this=0xf70092b8, attacker=0xa622438,
    pos=..., me=0xf70096e4) at game.cpp:256
#7  0x0809fab5 in Game::creatureMakeMagic (this=0x8202740, creature=0xa622438,
    centerpos=..., me=0xf70096e4) at game.cpp:4591
#8  0x080a0e2f in Game::creatureThrowRune (this=0x8202740, creature=0xa622438,
    centerpos=..., me=..., rune=0x0) at game.cpp:4831
#9  0x08163a60 in SpellScript::luaActionDoTargetSpell (L=0x842f108)
    at spells.cpp:482
#10 0xf7e0334b in luaD_precall () from /usr/lib/liblua50.so.5.0
#11 0xf7e0dfaf in luaV_execute () from /usr/lib/liblua50.so.5.0
#12 0xf7e03930 in luaD_call () from /usr/lib/liblua50.so.5.0
#13 0xf7dfe88c in ?? () from /usr/lib/liblua50.so.5.0
#14 0xf7e02dce in luaD_rawrunprotected () from /usr/lib/liblua50.so.5.0
#15 0xf7e03c03 in luaD_pcall () from /usr/lib/liblua50.so.5.0
#16 0xf7dffae6 in lua_pcall () from /usr/lib/liblua50.so.5.0