Obtained 23 stack frames.
/usr/games/crawl-git-826d19b2e0(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x55b27b094e9f]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-826d19b2e0(_Z20crash_signal_handleri+0x18f) [0x55b27b0952bf]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f9a32f92210]: 
/lib/x86_64-linux-gnu/libc.so.6(sigprocmask+0x4b) [0x7f9a32f9248b]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xb4) [0x7f9a32f717e2]: 
/usr/games/crawl-git-826d19b2e0(+0x4221c2) [0x55b27b09c1c2]: 
/usr/games/crawl-git-826d19b2e0(+0x4224e6) [0x55b27b09c4e6]: 
/usr/games/crawl-git-826d19b2e0(+0xa3e6c2) [0x55b27b6b86c2]: 
/usr/games/crawl-git-826d19b2e0(_ZN14TilesFramework14send_milestoneERK11xlog_fields+0x128) [0x55b27b6bacf8]: TilesFramework::send_milestone(xlog_fields const&)
/usr/games/crawl-git-826d19b2e0(_Z14mark_milestoneRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES6_S6_l+0x4c2) [0x55b27b203d02]: 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-826d19b2e0(_Z13do_crash_dumpv+0x245e) [0x55b27b09eabe]: do_crash_dump()
/usr/games/crawl-git-826d19b2e0(_Z20crash_signal_handleri+0x1fa) [0x55b27b09532a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f9a32f92210]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcb) [0x7f9a3315324b]: 
/usr/games/crawl-git-826d19b2e0(+0x4221bd) [0x55b27b09c1bd]: 
/usr/games/crawl-git-826d19b2e0(_Z12AssertFailedPKcS0_iS0_z+0x18e) [0x55b27b09c35e]: AssertFailed(char const*, char const*, int, char const*, ...)
/usr/games/crawl-git-826d19b2e0(_ZN12BaseRunDelay6handleEv+0x18b) [0x55b27b0b718b]: BaseRunDelay::handle()
/usr/games/crawl-git-826d19b2e0(_Z12handle_delayv+0x39) [0x55b27b0b5e39]: handle_delay()
/usr/games/crawl-git-826d19b2e0(+0xa594b0) [0x55b27b6d34b0]: 
/usr/games/crawl-git-826d19b2e0(+0xa59d5d) [0x55b27b6d3d5d]: 
/usr/games/crawl-git-826d19b2e0(main+0x1a5) [0x55b27afeddf5]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f9a32f730b3]: 
/usr/games/crawl-git-826d19b2e0(_start+0x2e) [0x55b27afee90e]: