Crash caused by signal #15: Terminated

Version: Dungeon Crawl Stone Soup 0.22-a0-303-g4a852b3
Platform: unix
Bits: 64
Game mode: normal
Tiles: online

Command line: /usr/games/crawl-git-4a852b32ea -name Amnesiac -rc /dgldir/rcfiles/crawl-git/Amnesiac.rc -macro /dgldir/rcfiles/crawl-git/Amnesiac.macro -morgue /dgldir/morgue/Amnesiac/ -webtiles-socket /crawl-master/webserver/sockets/Amnesiac:2018-03-27.05:03:04.sock -await-connection

RC options:
restart_after_game = false


Crash caused by signal #15: Terminated

Obtained 48 stack frames.
/usr/games/crawl-git-4a852b32ea(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x684b63]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-git-4a852b32ea(_Z13do_crash_dumpv+0x3c0) [0x68b780]: do_crash_dump()
/usr/games/crawl-git-4a852b32ea(_Z20crash_signal_handleri+0x74) [0x684db4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x321e0) [0x7fefe24841e0]: 
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x80) [0x7fefe24cd7d0]: 
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZNSs7reserveEm+0x68) [0x7fefe2f52828]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZNSs6appendEPKcm+0xb5) [0x7fefe2f52ab5]
/usr/games/crawl-git-4a852b32ea(_Z16lowercase_stringRKSs+0x41) [0xb05221]: lowercase_string(std::string const&)
/usr/games/crawl-git-4a852b32ea(_Z9lowercaseRSs+0x1e) [0xb0527e]: lowercase(std::string&)
/usr/games/crawl-git-4a852b32ea(_Z17get_unrandart_numPKc+0x3d5) [0x61fc35]: get_unrandart_num(char const*)
/usr/games/crawl-git-4a852b32ea(_ZN9item_list17parse_single_specER9item_specSs+0x1c0e) [0x8b9a9e]: item_list::parse_single_spec(item_spec&, std::string)
/usr/games/crawl-git-4a852b32ea(_ZN9item_list15parse_item_specESs+0x231) [0x8ba6f1]: item_list::parse_item_spec(std::string)
/usr/games/crawl-git-4a852b32ea(_ZN9item_list8add_itemERKSsb+0x63) [0x8ba8f3]: item_list::add_item(std::string const&, bool)
/usr/games/crawl-git-4a852b32ea(_ZN13keyed_mapspec8set_itemERKSsb+0xe4) [0x8be3e4]: keyed_mapspec::set_item(std::string const&, bool)
/usr/games/crawl-git-4a852b32ea(_ZN9map_lines13add_key_fieldERKSsM13keyed_mapspecFSsS1_bEMS2_FvRKS2_E+0x118) [0x8b0308]: map_lines::add_key_field(std::string const&, std::string (keyed_mapspec::*)(std::string const&, bool), void (keyed_mapspec::*)(keyed_mapspec const&))
/usr/games/crawl-git-4a852b32ea(_ZN9map_lines12add_key_itemERKSs+0x26) [0x8b07c6]: map_lines::add_key_item(std::string const&)
/usr/games/crawl-git-4a852b32ea() [0x844472]
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xca28) [0x7fefe3cfda28]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xce34) [0x7fefe3cfde34]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xc0ca) [0x7fefe3cfd0ca]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xd02f) [0x7fefe3cfe02f]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(lua_pcall+0x51) [0x7fefe3cf9b41]: 
/usr/games/crawl-git-4a852b32ea() [0x83d48b]
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xca28) [0x7fefe3cfda28]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0x17223) [0x7fefe3d08223]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xce7d) [0x7fefe3cfde7d]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xc0ca) [0x7fefe3cfd0ca]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xd02f) [0x7fefe3cfe02f]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(lua_pcall+0x51) [0x7fefe3cf9b41]: 
/usr/games/crawl-git-4a852b32ea(_ZN4CLua6callfnEPKcii+0xbf) [0x66e4bf]: CLua::callfn(char const*, int, int)
/usr/games/crawl-git-4a852b32ea(_ZN7map_def7run_luaEb+0x130) [0x8a3e30]: map_def::run_lua(bool)
/usr/games/crawl-git-4a852b32ea(_ZN7map_def16validate_map_defERK12depth_ranges+0x49) [0x8b3d39]: map_def::validate_map_def(depth_ranges const&)
/usr/games/crawl-git-4a852b32ea(_Z7yyparsev+0x20ab) [0xbde52b]: yyparse()
/usr/games/crawl-git-4a852b32ea(_Z8read_mapRKSs+0x357) [0x8d33b7]: read_map(std::string const&)
/usr/games/crawl-git-4a852b32ea() [0x8441c9]
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xca28) [0x7fefe3cfda28]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0x17328) [0x7fefe3d08328]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xce7d) [0x7fefe3cfde7d]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xc0ca) [0x7fefe3cfd0ca]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(+0xd02f) [0x7fefe3cfe02f]: 
/usr/lib/x86_64-linux-gnu/liblua5.1.so.0(lua_pcall+0x51) [0x7fefe3cf9b41]: 
/usr/games/crawl-git-4a852b32ea(_ZN4CLua8execfileEPKcbbb+0xd8) [0x66d818]: CLua::execfile(char const*, bool, bool, bool)
/usr/games/crawl-git-4a852b32ea(_Z9read_mapsv+0x2a) [0x8d1b6a]: read_maps()
/usr/games/crawl-git-4a852b32ea(_Z12startup_stepv+0x355) [0xae81a5]: startup_step()
/usr/games/crawl-git-4a852b32ea() [0xbd8bf6]
/usr/games/crawl-git-4a852b32ea(main+0x12a) [0x5ee58a]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7fefe2470ead]: 
/usr/games/crawl-git-4a852b32ea() [0x5eecdd]

Trying to run gdb.