Obtained 28 stack frames.
/usr/games/crawl-git-4f6bc678fa(_Z17write_stack_traceP8_IO_FILE+0x3b) [0x55fb3827d2bb]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-4f6bc678fa(_Z20crash_signal_handleri+0x1e5) [0x55fb3827d765]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7f38d3a1cf20]: 
/lib/x86_64-linux-gnu/libc.so.6(sigprocmask+0xd) [0x7f38d3a1d14d]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xac) [0x7f38d3a1e76c]: 
/usr/games/crawl-git-4f6bc678fa(+0x39a0a0) [0x55fb382850a0]: 
/usr/games/crawl-git-4f6bc678fa(+0x39a455) [0x55fb38285455]: 
/usr/games/crawl-git-4f6bc678fa(+0x9876a3) [0x55fb388726a3]: 
/usr/games/crawl-git-4f6bc678fa(_ZN14TilesFramework14send_milestoneERK11xlog_fields+0x128) [0x55fb38872e78]: TilesFramework::send_milestone(xlog_fields const&)
/usr/games/crawl-git-4f6bc678fa(_Z14mark_milestoneRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES6_S6_l+0x4ea) [0x55fb383da15a]: 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-4f6bc678fa(_Z13do_crash_dumpv+0x1ea1) [0x55fb38287451]: do_crash_dump()
/usr/games/crawl-git-4f6bc678fa(_Z20crash_signal_handleri+0xae) [0x55fb3827d62e]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7f38d3a1cf20]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xc7) [0x7f38d3de1727]: 
/usr/games/crawl-git-4f6bc678fa(+0x39a09b) [0x55fb3828509b]: 
/usr/games/crawl-git-4f6bc678fa(+0x39a455) [0x55fb38285455]: 
/usr/games/crawl-git-4f6bc678fa(_Z13invis_allowedbPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x556) [0x55fb3866d276]: invis_allowed(bool, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)
/usr/games/crawl-git-4f6bc678fa(+0x957293) [0x55fb38842293]: 
/usr/games/crawl-git-4f6bc678fa(_Z15xom_take_action14xom_event_typei+0x210) [0x55fb38842930]: xom_take_action(xom_event_type, int)
/usr/games/crawl-git-4f6bc678fa(_Z8xom_actsi10maybe_boolib+0x4d) [0x55fb3884b0fd]: xom_acts(int, maybe_bool, int, bool)
/usr/games/crawl-git-4f6bc678fa(_Z8xom_tickv+0x247) [0x55fb3884b367]: xom_tick()
/usr/games/crawl-git-4f6bc678fa(_Z13player_reactsv+0x665) [0x55fb38665155]: player_reacts()
/usr/games/crawl-git-4f6bc678fa(_Z12world_reactsv+0x5a5) [0x55fb38887d55]: world_reacts()
/usr/games/crawl-git-4f6bc678fa(+0x99ec84) [0x55fb38889c84]: 
/usr/games/crawl-git-4f6bc678fa(+0x99f22d) [0x55fb3888a22d]: 
/usr/games/crawl-git-4f6bc678fa(main+0x39b) [0x55fb381d60fb]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f38d39ffb97]: 
/usr/games/crawl-git-4f6bc678fa(_start+0x2a) [0x55fb381d693a]: