Obtained 40 stack frames.
/usr/games/crawl-0.22(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x6b3813]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-0.22(_Z20crash_signal_handleri+0x174) [0x6b3b64]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x321e0) [0x7f3f8a03e1e0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f3f8a3a6f6b]: 
/usr/games/crawl-0.22() [0x6ba694]
/usr/games/crawl-0.22() [0x6bab5f]
/usr/games/crawl-0.22(_Z20crash_signal_handleri+0x283) [0x6b3c73]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x321e0) [0x7f3f8a03e1e0]: 
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xbeab5) [0x7f3f8ab0aab5]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZNSs4_Rep8_M_cloneERKSaIcEm+0x94) [0x7f3f8ab0c774]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZNSs7reserveEm+0x30) [0x7f3f8ab0c7f0]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZNSs6appendEPKcm+0xb5) [0x7f3f8ab0cab5]
/usr/games/crawl-0.22(_Z16lowercase_stringRKSs+0x41) [0xb3de01]: lowercase_string(std::string const&)
/usr/games/crawl-0.22(_Z18mutation_from_nameSsbPSt6vectorI13mutation_typeSaIS0_EE+0x1c1) [0xa13101]: mutation_from_name(std::string, bool, std::vector<mutation_type, std::allocator<mutation_type> >*)
/usr/games/crawl-0.22() [0x8aee86]
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xca28) [0x7f3f8b8b7a28]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0x17328) [0x7f3f8b8c2328]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xce7d) [0x7f3f8b8b7e7d]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xc0ca) [0x7f3f8b8b70ca]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xd02f) [0x7f3f8b8b802f]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(lua_pcall+0x51) [0x7f3f8b8b3b41]: 
/usr/games/crawl-0.22(_ZN4CLua9calltopfnEP9lua_StatePKcP13__va_list_tagiPA1_S4_+0x55) [0x69c255]: CLua::calltopfn(lua_State*, char const*, __va_list_tag*, int, __va_list_tag (*) [1])
/usr/games/crawl-0.22(_ZN4CLua11callmaybefnEPKcS1_P13__va_list_tag+0x10a) [0x69cb2a]: CLua::callmaybefn(char const*, char const*, __va_list_tag*)
/usr/games/crawl-0.22(_ZN4CLua11callmaybefnEPKcS1_z+0x82) [0x69cc52]: CLua::callmaybefn(char const*, char const*, ...)
/usr/games/crawl-0.22(_Z21item_needs_autopickupRK8item_defb+0x1c2) [0x857792]: item_needs_autopickup(item_def const&, bool)
/usr/games/crawl-0.22(_Z18tile_draw_map_cellRK9coord_defb+0x750) [0xbf8810]: tile_draw_map_cell(coord_def const&, bool)
/usr/games/crawl-0.22(_Z14show_update_atRK9coord_def13enum_bitfieldI10layer_typeLi5EE+0x29d) [0xaacfad]: show_update_at(coord_def const&, enum_bitfield<layer_type, 5>)
/usr/games/crawl-0.22(_Z9show_init13enum_bitfieldI10layer_typeLi5EE+0x8a) [0xaadcaa]: show_init(enum_bitfield<layer_type, 5>)
/usr/games/crawl-0.22(_Z10viewwindowbbP9animation+0xc5) [0xba7c15]: viewwindow(bool, bool, animation*)
/usr/games/crawl-0.22(_Z11view_updatev+0x2a) [0xba869a]: view_update()
/usr/games/crawl-0.22(_ZNK7monster12check_redrawERK9coord_defb+0x95) [0xa01695]: monster::check_redraw(coord_def const&, bool) const
/usr/games/crawl-0.22() [0x581ee8]
/usr/games/crawl-0.22() [0x5840a8]
/usr/games/crawl-0.22(_Z19handle_monster_moveP7monster+0xb1b) [0x93ba2b]: handle_monster_move(monster*)
/usr/games/crawl-0.22(_Z15handle_monstersb+0x7f5) [0x93ddc5]: handle_monsters(bool)
/usr/games/crawl-0.22(_Z12world_reactsv+0xb2) [0xc17662]: world_reacts()
/usr/games/crawl-0.22() [0xc1d6c3]
/usr/games/crawl-0.22(main+0x645) [0x61b655]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f3f8a02aead]: 
/usr/games/crawl-0.22() [0x61c17d]