Obtained 26 stack frames.
/usr/games/crawl-git-0406aca7d3(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x55f7ccc4f13f]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-0406aca7d3(_Z20crash_signal_handleri+0x18f) [0x55f7ccc4f55f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f01c058a210]: 
/lib/x86_64-linux-gnu/libc.so.6(sigprocmask+0x4b) [0x7f01c058a48b]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xb4) [0x7f01c05697e2]: 
/usr/games/crawl-git-0406aca7d3(+0x41d1b2) [0x55f7ccc561b2]: 
/usr/games/crawl-git-0406aca7d3(+0x41d4d6) [0x55f7ccc564d6]: 
/usr/games/crawl-git-0406aca7d3(+0xa2cdf2) [0x55f7cd265df2]: 
/usr/games/crawl-git-0406aca7d3(_ZN14TilesFramework14send_milestoneERK11xlog_fields+0x128) [0x55f7cd2683e8]: TilesFramework::send_milestone(xlog_fields const&)
/usr/games/crawl-git-0406aca7d3(_Z14mark_milestoneRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES6_S6_l+0x4c2) [0x55f7ccdb9912]: 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-0406aca7d3(_Z13do_crash_dumpv+0x245e) [0x55f7ccc58aae]: do_crash_dump()
/usr/games/crawl-git-0406aca7d3(_Z20crash_signal_handleri+0x1fa) [0x55f7ccc4f5ca]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f01c058a210]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcb) [0x7f01c074b24b]: 
/usr/games/crawl-git-0406aca7d3(+0x41d1ad) [0x55f7ccc561ad]: 
/usr/games/crawl-git-0406aca7d3(+0x41d365) [0x55f7ccc56365]: 
/usr/games/crawl-git-0406aca7d3(_Z15behaviour_eventP7monster14mon_event_typePK5actor9coord_defb+0xf16) [0x55f7ccf46046]: behaviour_event(monster*, mon_event_type, actor const*, coord_def, bool)
/usr/games/crawl-git-0406aca7d3(_Z17slime_wall_damageP5actori+0x2dc) [0x55f7cd1b7aac]: slime_wall_damage(actor*, int)
/usr/games/crawl-git-0406aca7d3(_Z19handle_monster_moveP7monster+0x515) [0x55f7ccf3d825]: handle_monster_move(monster*)
/usr/games/crawl-git-0406aca7d3(_Z15handle_monstersb+0xb12) [0x55f7ccf406a2]: handle_monsters(bool)
/usr/games/crawl-git-0406aca7d3(_Z12world_reactsv+0xf9) [0x55f7cd27df49]: world_reacts()
/usr/games/crawl-git-0406aca7d3(+0xa46d73) [0x55f7cd27fd73]: 
/usr/games/crawl-git-0406aca7d3(+0xa4775d) [0x55f7cd28075d]: 
/usr/games/crawl-git-0406aca7d3(main+0x1a5) [0x55f7ccbaa045]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f01c056b0b3]: 
/usr/games/crawl-git-0406aca7d3(_start+0x2e) [0x55f7ccbaab5e]: