Obtained 23 stack frames.
/usr/games/crawl-0.20(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x680d63]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-0.20(_Z20crash_signal_handleri+0x1c9) [0x681139]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x351c0) [0x7f5757f011c0]: 
/lib/x86_64-linux-gnu/libgcc_s.so.1(+0x11306) [0x7f57584a5306]: 
/lib/x86_64-linux-gnu/libc.so.6(dl_iterate_phdr+0xec) [0x7f5757fe9c4c]: 
/lib/x86_64-linux-gnu/libgcc_s.so.1(_Unwind_Find_FDE+0x1a3) [0x7f57584a6273]: 
/lib/x86_64-linux-gnu/libgcc_s.so.1(+0xf527) [0x7f57584a3527]: 
/lib/x86_64-linux-gnu/libgcc_s.so.1(_Unwind_Backtrace+0x68) [0x7f57584a46f8]: 
/lib/x86_64-linux-gnu/libc.so.6(backtrace+0x56) [0x7f5757fc18c6]: 
/usr/games/crawl-0.20(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x680d63]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-0.20(_Z13do_crash_dumpv+0x330) [0x68a2f0]: do_crash_dump()
/usr/games/crawl-0.20(_Z20crash_signal_handleri+0x74) [0x680fe4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x351c0) [0x7f5757f011c0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f575828679b]: 
/usr/games/crawl-0.20() [0x689ab4]
/usr/games/crawl-0.20() [0x689e9b]
/usr/games/crawl-0.20() [0xc25d4c]
/usr/games/crawl-0.20(_Z9save_gamebPKc+0xd9) [0x74eb09]: save_game(bool, char const*)
/usr/games/crawl-0.20() [0xc4124f]
/usr/games/crawl-0.20() [0xc42705]
/usr/games/crawl-0.20(main+0x2ef) [0x5e37bf]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7f5757eedb45]: 
/usr/games/crawl-0.20() [0x5e3f2a]