Obtained 24 stack frames.
/usr/games/crawl-0.15(_Z17write_stack_traceP8_IO_FILEi+0x21) [0x560b31]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-0.15(_Z20crash_signal_handleri+0x1a8) [0x560ef8]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f35689474c0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f3568cddb7b]: 
/usr/games/crawl-0.15() [0x5684c9]
/usr/games/crawl-0.15() [0x5687a7]
/usr/games/crawl-0.15() [0x548c96]
/usr/games/crawl-0.15(_Z11real_colourjRK9coord_def+0x22) [0x548ff2]: real_colour(unsigned int, coord_def const&)
/usr/games/crawl-0.15(_Z14get_cell_glyphRK9coord_defbi+0x42e) [0x90aeee]: get_cell_glyph(coord_def const&, bool, int)
/usr/games/crawl-0.15(_Z10screenshotv+0x1a5) [0x9e8d25]: screenshot()
/usr/games/crawl-0.15(_Z13do_crash_dumpv+0x1c9f) [0x56a6cf]: do_crash_dump()
/usr/games/crawl-0.15(_Z20crash_signal_handleri+0x9c) [0x560dec]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f35689474c0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7f35689f6100]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7f356898a313]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x791da) [0x7f356898a1da]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x23e) [0x7f356898ac8e]: 
/lib/x86_64-linux-gnu/libc.so.6(fputs+0x9d) [0x7f356898007d]: 
/usr/games/crawl-0.15(_Z3endibPKcz+0x22b) [0x602beb]: end(int, bool, char const*, ...)
/usr/games/crawl-0.15(_Z9save_gamebPKc+0x1b5) [0x61b775]: save_game(bool, char const*)
/usr/games/crawl-0.15() [0x74699f]
/usr/games/crawl-0.15(main+0x64d) [0x74b91d]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f356893276d]: 
/usr/games/crawl-0.15() [0x4c1d29]