Obtained 27 stack frames.
/usr/games/crawl-imp(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x5a3123]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-imp(_Z20crash_signal_handleri+0x1a5) [0x5a34c5]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f01913724c0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f0191708b7b]: 
/usr/games/crawl-imp() [0x5aa019]
/usr/games/crawl-imp() [0x5aa2c1]
/usr/games/crawl-imp() [0x591557]
/usr/games/crawl-imp(_Z11real_colourjRK9coord_def+0x22) [0x5916d2]: real_colour(unsigned int, coord_def const&)
/usr/games/crawl-imp(_Z14get_cell_glyphRK9coord_defbi+0x15b) [0x976cbb]: get_cell_glyph(coord_def const&, bool, int)
/usr/games/crawl-imp(_Z10screenshotv+0x132) [0xa76fa2]: screenshot()
/usr/games/crawl-imp(_Z13do_crash_dumpv+0x2111) [0x5ac661]: do_crash_dump()
/usr/games/crawl-imp(_Z20crash_signal_handleri+0x9c) [0x5a33bc]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f01913724c0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7f0191421100]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7f01913b5313]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x791da) [0x7f01913b51da]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x23e) [0x7f01913b5c8e]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x4d016) [0x7f0191389016]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_vfprintf+0x59e) [0x7f0191383c1e]: 
/lib/x86_64-linux-gnu/libc.so.6(__fprintf_chk+0xeb) [0x7f01914438cb]: 
/usr/games/crawl-imp(_Z3endibPKcz+0x237) [0x63eb67]: end(int, bool, char const*, ...)
/usr/games/crawl-imp(_Z9save_gamebPKc+0x160) [0x65fb10]: save_game(bool, char const*)
/usr/games/crawl-imp() [0x79d8d3]
/usr/games/crawl-imp() [0x79e675]
/usr/games/crawl-imp(main+0x303) [0x7a1673]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f019135d76d]: 
/usr/games/crawl-imp() [0x507949]