Obtained 26 stack frames.
/usr/games/crawl-git-0406aca7d3(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x555ff441113f]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-0406aca7d3(_Z20crash_signal_handleri+0x18f) [0x555ff441155f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f3550953210]: 
/lib/x86_64-linux-gnu/libc.so.6(sigprocmask+0x4b) [0x7f355095348b]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xb4) [0x7f35509327e2]: 
/usr/games/crawl-git-0406aca7d3(+0x41d1b2) [0x555ff44181b2]: 
/usr/games/crawl-git-0406aca7d3(+0x41d4d6) [0x555ff44184d6]: 
/usr/games/crawl-git-0406aca7d3(+0xa2cdf2) [0x555ff4a27df2]: 
/usr/games/crawl-git-0406aca7d3(_ZN14TilesFramework14send_milestoneERK11xlog_fields+0x128) [0x555ff4a2a3e8]: TilesFramework::send_milestone(xlog_fields const&)
/usr/games/crawl-git-0406aca7d3(_Z14mark_milestoneRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES6_S6_l+0x4c2) [0x555ff457b912]: 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) [0x555ff441aaae]: do_crash_dump()
/usr/games/crawl-git-0406aca7d3(_Z20crash_signal_handleri+0x1fa) [0x555ff44115ca]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f3550953210]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcb) [0x7f3550b1424b]: 
/usr/games/crawl-git-0406aca7d3(+0x41d1ad) [0x555ff44181ad]: 
/usr/games/crawl-git-0406aca7d3(+0x41d365) [0x555ff4418365]: 
/usr/games/crawl-git-0406aca7d3(_Z15behaviour_eventP7monster14mon_event_typePK5actor9coord_defb+0xf16) [0x555ff4708046]: behaviour_event(monster*, mon_event_type, actor const*, coord_def, bool)
/usr/games/crawl-git-0406aca7d3(_Z17slime_wall_damageP5actori+0x2dc) [0x555ff4979aac]: slime_wall_damage(actor*, int)
/usr/games/crawl-git-0406aca7d3(_Z19handle_monster_moveP7monster+0x515) [0x555ff46ff825]: handle_monster_move(monster*)
/usr/games/crawl-git-0406aca7d3(_Z15handle_monstersb+0xb12) [0x555ff47026a2]: handle_monsters(bool)
/usr/games/crawl-git-0406aca7d3(_Z12world_reactsv+0xf9) [0x555ff4a3ff49]: world_reacts()
/usr/games/crawl-git-0406aca7d3(+0xa46d73) [0x555ff4a41d73]: 
/usr/games/crawl-git-0406aca7d3(+0xa4775d) [0x555ff4a4275d]: 
/usr/games/crawl-git-0406aca7d3(main+0x1a5) [0x555ff436c045]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f35509340b3]: 
/usr/games/crawl-git-0406aca7d3(_start+0x2e) [0x555ff436cb5e]: