Obtained 23 stack frames.
/usr/games/crawl-git-d5e1996cdb(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x55c886b4962f]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-d5e1996cdb(_Z20crash_signal_handleri+0x18f) [0x55c886b49a4f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f0c1ef07210]: 
/lib/x86_64-linux-gnu/libc.so.6(sigprocmask+0x4b) [0x7f0c1ef0748b]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xb4) [0x7f0c1eee67e2]: 
/usr/games/crawl-git-d5e1996cdb(+0x41d6a2) [0x55c886b506a2]: 
/usr/games/crawl-git-d5e1996cdb(+0x41d9c6) [0x55c886b509c6]: 
/usr/games/crawl-git-d5e1996cdb(+0xa2d982) [0x55c887160982]: 
/usr/games/crawl-git-d5e1996cdb(_ZN14TilesFramework14send_milestoneERK11xlog_fields+0x128) [0x55c887162f78]: TilesFramework::send_milestone(xlog_fields const&)
/usr/games/crawl-git-d5e1996cdb(_Z14mark_milestoneRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES6_S6_l+0x4c2) [0x55c886cb3e22]: mark_milestone(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, long)
/usr/games/crawl-git-d5e1996cdb(_Z13do_crash_dumpv+0x245e) [0x55c886b52f9e]: do_crash_dump()
/usr/games/crawl-git-d5e1996cdb(_Z20crash_signal_handleri+0x1fa) [0x55c886b49aba]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f0c1ef07210]: 
/usr/games/crawl-git-d5e1996cdb(_ZN6writer9writeByteEh+0x81) [0x55c887077a51]: writer::writeByte(unsigned char)
/usr/games/crawl-git-d5e1996cdb(_Z9tag_write8tag_typeR6writer+0x1d52) [0x55c88708c112]: tag_write(tag_type, writer&)
/usr/games/crawl-git-d5e1996cdb(+0x4ed5f8) [0x55c886c205f8]: 
/usr/games/crawl-git-d5e1996cdb(_Z10save_levelRK8level_id+0x5a) [0x55c886c2828a]: save_level(level_id const&)
/usr/games/crawl-git-d5e1996cdb(_Z9save_gamebPKc+0x8a4) [0x55c886c28c34]: save_game(bool, char const*)
/usr/games/crawl-git-d5e1996cdb(+0xa477db) [0x55c88717a7db]: 
/usr/games/crawl-git-d5e1996cdb(+0xa482ed) [0x55c88717b2ed]: 
/usr/games/crawl-git-d5e1996cdb(main+0x1a5) [0x55c886aa4355]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f0c1eee80b3]: 
/usr/games/crawl-git-d5e1996cdb(_start+0x2e) [0x55c886aa4e6e]: