Obtained 26 stack frames.
/usr/games/crawl-git-0406aca7d3(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x55e3d590613f]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-0406aca7d3(_Z20crash_signal_handleri+0x18f) [0x55e3d590655f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f9b83d84210]: 
/lib/x86_64-linux-gnu/libc.so.6(sigprocmask+0x4b) [0x7f9b83d8448b]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xb4) [0x7f9b83d637e2]: 
/usr/games/crawl-git-0406aca7d3(+0x41d1b2) [0x55e3d590d1b2]: 
/usr/games/crawl-git-0406aca7d3(+0x41d4d6) [0x55e3d590d4d6]: 
/usr/games/crawl-git-0406aca7d3(+0xa2cdf2) [0x55e3d5f1cdf2]: 
/usr/games/crawl-git-0406aca7d3(_ZN14TilesFramework14send_milestoneERK11xlog_fields+0x128) [0x55e3d5f1f3e8]: TilesFramework::send_milestone(xlog_fields const&)
/usr/games/crawl-git-0406aca7d3(_Z14mark_milestoneRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES6_S6_l+0x4c2) [0x55e3d5a70912]: 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) [0x55e3d590faae]: do_crash_dump()
/usr/games/crawl-git-0406aca7d3(_Z20crash_signal_handleri+0x1fa) [0x55e3d59065ca]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f9b83d84210]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcb) [0x7f9b83f4524b]: 
/usr/games/crawl-git-0406aca7d3(+0x41d1ad) [0x55e3d590d1ad]: 
/usr/games/crawl-git-0406aca7d3(+0x41d365) [0x55e3d590d365]: 
/usr/games/crawl-git-0406aca7d3(_Z15behaviour_eventP7monster14mon_event_typePK5actor9coord_defb+0xf16) [0x55e3d5bfd046]: behaviour_event(monster*, mon_event_type, actor const*, coord_def, bool)
/usr/games/crawl-git-0406aca7d3(_Z17slime_wall_damageP5actori+0x2dc) [0x55e3d5e6eaac]: slime_wall_damage(actor*, int)
/usr/games/crawl-git-0406aca7d3(_Z19handle_monster_moveP7monster+0x515) [0x55e3d5bf4825]: handle_monster_move(monster*)
/usr/games/crawl-git-0406aca7d3(_Z15handle_monstersb+0xb12) [0x55e3d5bf76a2]: handle_monsters(bool)
/usr/games/crawl-git-0406aca7d3(_Z12world_reactsv+0xf9) [0x55e3d5f34f49]: world_reacts()
/usr/games/crawl-git-0406aca7d3(+0xa46d73) [0x55e3d5f36d73]: 
/usr/games/crawl-git-0406aca7d3(+0xa4775d) [0x55e3d5f3775d]: 
/usr/games/crawl-git-0406aca7d3(main+0x1a5) [0x55e3d5861045]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f9b83d650b3]: 
/usr/games/crawl-git-0406aca7d3(_start+0x2e) [0x55e3d5861b5e]: