Obtained 25 stack frames.
/usr/games/crawl-git-5d7b2d6c54(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x5ab77745a15e]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-5d7b2d6c54(_Z20crash_signal_handleri+0x18f) [0x5ab77745a5cf]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x7a6f513b3330]: 
/usr/games/crawl-git-5d7b2d6c54(+0xcdf05f) [0x5ab777c4505f]: 
/usr/games/crawl-git-5d7b2d6c54(lua_gettable+0x5c) [0x5ab777c3649c]: 
/usr/games/crawl-git-5d7b2d6c54(_ZNK14map_lua_marker15debug_to_stringB5cxx11Ev+0x57) [0x5ab777788307]: map_lua_marker::debug_to_string[abi:cxx11]() const
/usr/games/crawl-git-5d7b2d6c54(_Z13do_crash_dumpv+0x1d84) [0x5ab777469ce4]: do_crash_dump()
/usr/games/crawl-git-5d7b2d6c54(_Z20crash_signal_handleri+0x1fa) [0x5ab77745a63a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x7a6f513b3330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x7a6f5140cb2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x7a6f513b327e]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xdf) [0x7a6f513968ff]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x297b6) [0x7a6f513977b6]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa8ff5) [0x7a6f51416ff5]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xab12c) [0x7a6f5141912c]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_free+0x7e) [0x7a6f5141bdae]: 
/usr/games/crawl-git-5d7b2d6c54(+0xce73d1) [0x5ab777c4d3d1]: 
/usr/games/crawl-git-5d7b2d6c54(+0xcd8a29) [0x5ab777c3ea29]: 
/usr/games/crawl-git-5d7b2d6c54(+0xcddebd) [0x5ab777c43ebd]: 
/usr/games/crawl-git-5d7b2d6c54(_ZN4CLua5closeEv+0xbe) [0x5ab77744135e]: CLua::close()
/usr/games/crawl-git-5d7b2d6c54(+0x2f4afc) [0x5ab77725aafc]: 
/usr/games/crawl-git-5d7b2d6c54(+0x2f7ac8) [0x5ab77725dac8]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x7a6f513981ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x7a6f5139828b]: 
/usr/games/crawl-git-5d7b2d6c54(_start+0x25) [0x5ab77738c7a5]: