Obtained 18 stack frames.
/usr/games/crawl-helen(_Z17write_stack_traceP8_IO_FILEi+0x21) [0x552701]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-helen(_Z20crash_signal_handleri+0x1a8) [0x552ac8]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f76887e34c0]: 
/usr/games/crawl-helen(_Z23raw_feature_descriptionRK9coord_def+0x7c) [0x5b07ac]: raw_feature_description(coord_def const&)
/usr/games/crawl-helen(_Z13do_crash_dumpv+0xc23) [0x55aab3]: do_crash_dump()
/usr/games/crawl-helen(_Z20crash_signal_handleri+0x9c) [0x5529bc]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f76887e34c0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7f7688892100]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7f7688826313]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x791da) [0x7f76888261da]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x23e) [0x7f7688826c8e]: 
/lib/x86_64-linux-gnu/libc.so.6(fputs+0x9d) [0x7f768881c07d]: 
/usr/games/crawl-helen(_Z3endibPKcz+0x221) [0x98a9d1]: end(int, bool, char const*, ...)
/usr/games/crawl-helen(_Z9save_gamebPKc+0x1b5) [0x60a215]: save_game(bool, char const*)
/usr/games/crawl-helen() [0x7313af]
/usr/games/crawl-helen(main+0x5fd) [0x73633d]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f76887ce76d]: 
/usr/games/crawl-helen() [0x4bfa39]