Obtained 15 stack frames.
/usr/games/crawl-0.21(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x682db3]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-0.21(_Z20crash_signal_handleri+0x174) [0x683124]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x33060) [0x7fdd52439060]: 
/usr/games/crawl-0.21(_Z23raw_feature_descriptionRK9coord_def+0x4b) [0x6e6acb]: raw_feature_description(coord_def const&)
/usr/games/crawl-0.21(_Z13do_crash_dumpv+0xe98) [0x68a4f8]: do_crash_dump()
/usr/games/crawl-0.21(_Z20crash_signal_handleri+0x74) [0x683024]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x33060) [0x7fdd52439060]: 
/lib/x86_64-linux-gnu/libc.so.6(__xstat64+0x15) [0x7fdd524e1055]: 
/usr/games/crawl-0.21(_Z11file_existsRKSs+0x2a) [0xb04e7a]: file_exists(std::string const&)
/usr/games/crawl-0.21(_ZN4CLua12load_persistEv+0x48) [0x66d938]: CLua::load_persist()
/usr/games/crawl-0.21(_Z12startup_stepv+0x810) [0xae5d20]: startup_step()
/usr/games/crawl-0.21() [0xbd6076]
/usr/games/crawl-0.21(main+0x2eb) [0x5eccbb]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1) [0x7fdd524262e1]: 
/usr/games/crawl-0.21() [0x5ed20d]