Obtained 50 stack frames.
/usr/games/crawl-git-f52bb6b557(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x6555520de83e]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-f52bb6b557(_Z20crash_signal_handleri+0x18f) [0x6555520decaf]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x7a3f325e0330]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0x97) [0x7a3f325c38b7]: 
/usr/games/crawl-git-f52bb6b557(+0x501e52) [0x6555520ebe52]: 
/usr/games/crawl-git-f52bb6b557(_Z12AssertFailedPKcS0_iS0_z+0x1c7) [0x6555520ec357]: AssertFailed(char const*, char const*, int, char const*, ...)
/usr/games/crawl-git-f52bb6b557(_ZNK12monster_info11common_nameB5cxx11E22description_level_type+0x1424) [0x6555524e9e24]: monster_info::common_name[abi:cxx11](description_level_type) const
/usr/games/crawl-git-f52bb6b557(_ZNK12monster_info11proper_nameB5cxx11E22description_level_type+0x48) [0x6555524e9f38]: monster_info::proper_name[abi:cxx11](description_level_type) const
/usr/games/crawl-git-f52bb6b557(_ZNK7monster4nameB5cxx11E22description_level_typebb+0xcf) [0x65555254698f]: monster::name[abi:cxx11](description_level_type, bool, bool) const
/usr/games/crawl-git-f52bb6b557(_Z15debug_item_scanv+0x6ed) [0x6555520f24ed]: debug_item_scan()
/usr/games/crawl-git-f52bb6b557(_Z13do_crash_dumpv+0x198b) [0x6555520edfcb]: do_crash_dump()
/usr/games/crawl-git-f52bb6b557(_Z20crash_signal_handleri+0x1fa) [0x6555520ded1a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x7a3f325e0330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x7a3f32639b2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x7a3f325e027e]: 
/usr/games/crawl-git-f52bb6b557(+0x501e4d) [0x6555520ebe4d]: 
/usr/games/crawl-git-f52bb6b557(_Z12AssertFailedPKcS0_iS0_z+0x1c7) [0x6555520ec357]: AssertFailed(char const*, char const*, int, char const*, ...)
/usr/games/crawl-git-f52bb6b557(_ZNK12monster_info11common_nameB5cxx11E22description_level_type+0x1424) [0x6555524e9e24]: monster_info::common_name[abi:cxx11](description_level_type) const
/usr/games/crawl-git-f52bb6b557(_ZNK12monster_info11proper_nameB5cxx11E22description_level_type+0x48) [0x6555524e9f38]: monster_info::proper_name[abi:cxx11](description_level_type) const
/usr/games/crawl-git-f52bb6b557(_ZNK7monster4nameB5cxx11E22description_level_typebb+0xcf) [0x65555254698f]: monster::name[abi:cxx11](description_level_type, bool, bool) const
/usr/games/crawl-git-f52bb6b557(_Z17slymdra_polymorphR7monster15poly_power_type+0x7d) [0x6555524595bd]: slymdra_polymorph(monster&, poly_power_type)
/usr/games/crawl-git-f52bb6b557(_ZN7monster9polymorphE15poly_power_type+0xcb) [0x65555254e27b]: monster::polymorph(poly_power_type)
/usr/games/crawl-git-f52bb6b557(_ZN4bolt28apply_enchantment_to_monsterEP7monster+0x1422) [0x65555208a1f2]: bolt::apply_enchantment_to_monster(monster*)
/usr/games/crawl-git-f52bb6b557(_ZN4bolt26enchantment_affect_monsterEP7monster+0x278) [0x6555520951d8]: bolt::enchantment_affect_monster(monster*)
/usr/games/crawl-git-f52bb6b557(+0x4a2d09) [0x65555208cd09]: 
/usr/games/crawl-git-f52bb6b557(_ZN4bolt7do_fireEv+0x3b6) [0x655552095756]: bolt::do_fire()
/usr/games/crawl-git-f52bb6b557(_ZN4bolt4fireEv+0x268) [0x655552096818]: bolt::fire()
/usr/games/crawl-git-f52bb6b557(_Z19chaos_affects_actorP5actorS0_+0x21a) [0x6555520bd2aa]: chaos_affects_actor(actor*, actor*)
/usr/games/crawl-git-f52bb6b557(_ZN6attack18apply_damage_brandEPKc+0x205) [0x6555520739f5]: attack::apply_damage_brand(char const*)
/usr/games/crawl-git-f52bb6b557(_ZN12melee_attack16handle_phase_hitEv+0x130a) [0x65555242d06a]: melee_attack::handle_phase_hit()
/usr/games/crawl-git-f52bb6b557(_ZN12melee_attack6attackEv+0xa2c) [0x65555242f26c]: melee_attack::attack()
/usr/games/crawl-git-f52bb6b557(_ZN12melee_attack17launch_attack_setEb+0x35) [0x65555242e505]: melee_attack::launch_attack_set(bool)
/usr/games/crawl-git-f52bb6b557(_Z11fight_meleeP5actorS0_bPbb+0x4a6) [0x6555521e4bf6]: fight_melee(actor*, actor*, bool, bool*, bool)
/usr/games/crawl-git-f52bb6b557(_Z18move_player_action9coord_def+0x6eb) [0x65555255eaab]: move_player_action(coord_def)
/usr/games/crawl-git-f52bb6b557(+0x76f94a) [0x65555235994a]: 
/usr/games/crawl-git-f52bb6b557(+0xcd4ef3) [0x6555528beef3]: 
/usr/games/crawl-git-f52bb6b557(+0xce4115) [0x6555528ce115]: 
/usr/games/crawl-git-f52bb6b557(+0xcd520d) [0x6555528bf20d]: 
/usr/games/crawl-git-f52bb6b557(+0xcd4053) [0x6555528be053]: 
/usr/games/crawl-git-f52bb6b557(+0xcd5634) [0x6555528bf634]: 
/usr/games/crawl-git-f52bb6b557(lua_pcallk+0x95) [0x6555528bb8e5]: 
/usr/games/crawl-git-f52bb6b557(_ZN4CLua5pcallEii+0x60) [0x6555520c3830]: CLua::pcall(int, int)
/usr/games/crawl-git-f52bb6b557(_ZN4CLua6callfnEPKcii+0xb4) [0x6555520c5154]: CLua::callfn(char const*, int, int)
/usr/games/crawl-git-f52bb6b557(_Z15process_command12command_typeS_+0x208) [0x6555528aa648]: process_command(command_type, command_type)
/usr/games/crawl-git-f52bb6b557(+0xcbe942) [0x6555528a8942]: 
/usr/games/crawl-git-f52bb6b557(+0xcbf385) [0x6555528a9385]: 
/usr/games/crawl-git-f52bb6b557(main+0x1f7) [0x6555520103d7]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x7a3f325c51ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x7a3f325c528b]: 
/usr/games/crawl-git-f52bb6b557(_start+0x25) [0x655552010ec5]: