Obtained 22 stack frames.
/usr/games/crawl-0.31(_Z17write_stack_traceP8_IO_FILE+0x27) [0x56207aa33cb7]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-0.31(_Z20crash_signal_handleri+0x157) [0x56207aa34087]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3bfd0) [0x7f5d815ccfd0]: 
/usr/games/crawl-0.31(_Z23raw_feature_descriptionB5cxx11RK9coord_def+0x52) [0x56207aabf642]: raw_feature_description[abi:cxx11](coord_def const&)
/usr/games/crawl-0.31(_Z13do_crash_dumpv+0x21a2) [0x56207aa40842]: do_crash_dump()
/usr/games/crawl-0.31(_Z20crash_signal_handleri+0x1ca) [0x56207aa340fa]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3bfd0) [0x7f5d815ccfd0]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x8ad3c) [0x7f5d8161bd3c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x12) [0x7f5d815ccf32]: 
/usr/games/crawl-0.31(+0x453fb6) [0x56207aa3dfb6]: 
/usr/games/crawl-0.31(+0x45455e) [0x56207aa3e55e]: 
/usr/games/crawl-0.31(+0x9f2662) [0x56207afdc662]: 
/usr/games/crawl-0.31(_Z8tag_readR6reader8tag_type+0x118) [0x56207afdf108]: tag_read(reader&, tag_type)
/usr/games/crawl-0.31(+0x53ee88) [0x56207ab28e88]: 
/usr/games/crawl-0.31(+0x53fca7) [0x56207ab29ca7]: 
/usr/games/crawl-0.31(_Z12restore_gameRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0xe) [0x56207ab2a9ae]: restore_game(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-0.31(_Z12startup_stepv+0xf08) [0x56207af96568]: startup_step()
/usr/games/crawl-0.31(+0xaf48de) [0x56207b0de8de]: 
/usr/games/crawl-0.31(main+0x19f) [0x56207a98499f]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x271ca) [0x7f5d815b81ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x85) [0x7f5d815b8285]: 
/usr/games/crawl-0.31(_start+0x21) [0x56207a985291]: