Obtained 25 stack frames.
/usr/games/crawl-git-4dbb6ee0fb(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x5f5da3]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-git-4dbb6ee0fb(_Z20crash_signal_handleri+0x174) [0x5f6114]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7f866380e4f0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f8663b74efb]: 
/usr/games/crawl-git-4dbb6ee0fb() [0x5fbd64]
/usr/games/crawl-git-4dbb6ee0fb() [0x5fbfca]
/usr/games/crawl-git-4dbb6ee0fb() [0x5de646]
/usr/games/crawl-git-4dbb6ee0fb(_Z11real_colourjRK9coord_def+0x22) [0x5de802]: real_colour(unsigned int, coord_def const&)
/usr/games/crawl-git-4dbb6ee0fb(_Z14get_cell_glyphRK9coord_defbi+0x15b) [0x9685eb]: get_cell_glyph(coord_def const&, bool, int)
/usr/games/crawl-git-4dbb6ee0fb(_Z10screenshotv+0x172) [0xa43332]: screenshot()
/usr/games/crawl-git-4dbb6ee0fb(_Z13do_crash_dumpv+0x1ea7) [0x5fe067]: do_crash_dump()
/usr/games/crawl-git-4dbb6ee0fb(_Z20crash_signal_handleri+0x74) [0x5f6014]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7f866380e4f0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7f86638aaaf0]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7f866384ee53]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x72aca) [0x7f866384eaca]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x1fe) [0x7f866384edbe]: 
/lib/x86_64-linux-gnu/libc.so.6(fputs+0x9c) [0x7f8663844a0c]: 
/usr/games/crawl-git-4dbb6ee0fb(_Z3endibPKcz+0x20b) [0x9f2d9b]: end(int, bool, char const*, ...)
/usr/games/crawl-git-4dbb6ee0fb(_Z9save_gamebPKc+0x152) [0x6a6db2]: save_game(bool, char const*)
/usr/games/crawl-git-4dbb6ee0fb() [0x7be0e2]
/usr/games/crawl-git-4dbb6ee0fb() [0x7bebcd]
/usr/games/crawl-git-4dbb6ee0fb(main+0x2f9) [0x4fc3b9]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f86637faead]: 
/usr/games/crawl-git-4dbb6ee0fb() [0x56e39d]