Obtained 25 stack frames.
/usr/games/crawl-git-dff4d4763e(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x5f7253]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-git-dff4d4763e(_Z20crash_signal_handleri+0x174) [0x5f75c4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7f8d7081a4f0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f8d70b80efb]: 
/usr/games/crawl-git-dff4d4763e() [0x5fd334]
/usr/games/crawl-git-dff4d4763e() [0x5fd59a]
/usr/games/crawl-git-dff4d4763e() [0x5dfa46]
/usr/games/crawl-git-dff4d4763e(_Z11real_colourjRK9coord_def+0x22) [0x5dfc02]: real_colour(unsigned int, coord_def const&)
/usr/games/crawl-git-dff4d4763e(_Z14get_cell_glyphRK9coord_defbi+0x15b) [0x96b50b]: get_cell_glyph(coord_def const&, bool, int)
/usr/games/crawl-git-dff4d4763e(_Z10screenshotv+0x16a) [0xa46d1a]: screenshot()
/usr/games/crawl-git-dff4d4763e(_Z13do_crash_dumpv+0x1e37) [0x5ff5f7]: do_crash_dump()
/usr/games/crawl-git-dff4d4763e(_Z20crash_signal_handleri+0x74) [0x5f74c4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7f8d7081a4f0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7f8d708b6af0]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7f8d7085ae53]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x72aca) [0x7f8d7085aaca]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x1fe) [0x7f8d7085adbe]: 
/lib/x86_64-linux-gnu/libc.so.6(fputs+0x9c) [0x7f8d70850a0c]: 
/usr/games/crawl-git-dff4d4763e(_Z3endibPKcz+0x20b) [0x9f61cb]: end(int, bool, char const*, ...)
/usr/games/crawl-git-dff4d4763e(_Z9save_gamebPKc+0x152) [0x6a8d02]: save_game(bool, char const*)
/usr/games/crawl-git-dff4d4763e() [0x7c08af]
/usr/games/crawl-git-dff4d4763e() [0x7c13bd]
/usr/games/crawl-git-dff4d4763e(main+0x303) [0x4fc203]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f8d70806ead]: 
/usr/games/crawl-git-dff4d4763e() [0x56e9a9]