Obtained 25 stack frames.
/usr/games/crawl-0.34(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x56e3419fbb1e]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-0.34(_Z20crash_signal_handleri+0x18f) [0x56e3419fbf8f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x70075a242910]: 
/usr/games/crawl-0.34(+0xce24ff) [0x56e3421e94ff]: 
/usr/games/crawl-0.34(lua_gettable+0x5c) [0x56e3421da98c]: 
/usr/games/crawl-0.34(_ZNK14map_lua_marker15debug_to_stringB5cxx11Ev+0x57) [0x56e341d2b2e7]: map_lua_marker::debug_to_string[abi:cxx11]() const
/usr/games/crawl-0.34(_Z13do_crash_dumpv+0x1d94) [0x56e341a0b6d4]: do_crash_dump()
/usr/games/crawl-0.34(_Z20crash_signal_handleri+0x1fa) [0x56e3419fbffa]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x70075a242910]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11b) [0x70075a29999b]: 
/lib/x86_64-linux-gnu/libc.so.6(raise+0x16) [0x70075a242866]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xd7) [0x70075a2268b7]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x27750) [0x70075a227750]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa3c67) [0x70075a2a3c67]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa5c5c) [0x70075a2a5c5c]: 
/lib/x86_64-linux-gnu/libc.so.6(free+0x73) [0x70075a2a87f3]: 
/usr/games/crawl-0.34(+0xcea911) [0x56e3421f1911]: 
/usr/games/crawl-0.34(+0xcdbf19) [0x56e3421e2f19]: 
/usr/games/crawl-0.34(+0xce138d) [0x56e3421e838d]: 
/usr/games/crawl-0.34(_ZN4CLua5closeEv+0xbe) [0x56e3419e2c4e]: CLua::close()
/usr/games/crawl-0.34(+0x2f50ac) [0x56e3417fc0ac]: 
/usr/games/crawl-0.34(+0x2f8075) [0x56e3417ff075]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x280d0) [0x70075a2280d0]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x89) [0x70075a228189]: 
/usr/games/crawl-0.34(_start+0x25) [0x56e34192e015]: