Obtained 24 stack frames.
/usr/games/crawl-0.15(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x601f83]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-0.15(_Z20crash_signal_handleri+0x174) [0x6022f4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7f4ff55434f0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f4ff58a9efb]: 
/usr/games/crawl-0.15() [0x608504]
/usr/games/crawl-0.15() [0x60876a]
/usr/games/crawl-0.15() [0x5eac76]
/usr/games/crawl-0.15(_Z11real_colourjRK9coord_def+0x22) [0x5eadf2]: real_colour(unsigned int, coord_def const&)
/usr/games/crawl-0.15(_Z14get_cell_glyphRK9coord_defbi+0x15b) [0x969a0b]: get_cell_glyph(coord_def const&, bool, int)
/usr/games/crawl-0.15(_Z10screenshotv+0x16a) [0xa3b87a]: screenshot()
/usr/games/crawl-0.15(_Z13do_crash_dumpv+0x1e61) [0x60a7f1]: do_crash_dump()
/usr/games/crawl-0.15(_Z20crash_signal_handleri+0x74) [0x6021f4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7f4ff55434f0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7f4ff55dfaf0]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7f4ff5583e53]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x72aca) [0x7f4ff5583aca]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x1fe) [0x7f4ff5583dbe]: 
/lib/x86_64-linux-gnu/libc.so.6(fputs+0x9c) [0x7f4ff5579a0c]: 
/usr/games/crawl-0.15(_Z3endibPKcz+0x20b) [0x69959b]: end(int, bool, char const*, ...)
/usr/games/crawl-0.15(_Z9save_gamebPKc+0x1b5) [0x6af065]: save_game(bool, char const*)
/usr/games/crawl-0.15() [0x7c65ed]
/usr/games/crawl-0.15(main+0x5f5) [0x4fdca5]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f4ff552fead]: 
/usr/games/crawl-0.15() [0x570079]