Obtained 23 stack frames.
/usr/games/crawl-0.18(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x663463]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-0.18(_Z20crash_signal_handleri+0x174) [0x6637d4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x321e0) [0x7f26e66631e0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f26e69cbf6b]: 
/usr/games/crawl-0.18() [0x669954]
/usr/games/crawl-0.18() [0x669ddf]
/usr/games/crawl-0.18(_Z20crash_signal_handleri+0x293) [0x6638f3]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x321e0) [0x7f26e66631e0]: 
/usr/games/crawl-0.18(_ZNK12monster_info11common_nameE22description_level_type+0x3b) [0x918ceb]: monster_info::common_name(description_level_type) const
/usr/games/crawl-0.18(_ZNK12monster_info11proper_nameE22description_level_type+0x5e) [0x91a35e]: monster_info::proper_name(description_level_type) const
/usr/games/crawl-0.18(_ZNK7monster4nameE22description_level_typebb+0x6a) [0x97dc3a]: monster::name(description_level_type, bool, bool) const
/usr/games/crawl-0.18(_Z15mons_spell_beamP7monster10spell_typeib+0x4b0) [0x8d6f40]: mons_spell_beam(monster*, spell_type, int, bool)
/usr/games/crawl-0.18(_Z15setup_mons_castP7monsterR4bolt10spell_typeb+0x627) [0x8dd147]: setup_mons_cast(monster*, bolt&, spell_type, bool)
/usr/games/crawl-0.18(_Z16handle_mon_spellP7monsterR4bolt+0xc61) [0x8f33d1]: handle_mon_spell(monster*, bolt&)
/usr/games/crawl-0.18() [0x5353c3]
/usr/games/crawl-0.18(_Z19handle_monster_moveP7monster+0x15a6) [0x8ca946]: handle_monster_move(monster*)
/usr/games/crawl-0.18(_Z15handle_monstersb+0x7dd) [0x8cbdbd]: handle_monsters(bool)
/usr/games/crawl-0.18(_Z12world_reactsv+0x12f) [0xb7b4ef]: world_reacts()
/usr/games/crawl-0.18() [0xb8336e]
/usr/games/crawl-0.18() [0xb83ca5]
/usr/games/crawl-0.18(main+0x2eb) [0x5c717b]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f26e664fead]: 
/usr/games/crawl-0.18() [0x5c7489]