Obtained 26 stack frames.
/usr/games/crawl-git-a75cb3825e(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x559a502e753f]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-a75cb3825e(_Z20crash_signal_handleri+0x18f) [0x559a502e795f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f0cb7df7210]: 
/lib/x86_64-linux-gnu/libc.so.6(sigprocmask+0x4b) [0x7f0cb7df748b]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xb4) [0x7f0cb7dd67e2]: 
/usr/games/crawl-git-a75cb3825e(+0x424862) [0x559a502ee862]: 
/usr/games/crawl-git-a75cb3825e(+0x424b86) [0x559a502eeb86]: 
/usr/games/crawl-git-a75cb3825e(+0xa42e72) [0x559a5090ce72]: 
/usr/games/crawl-git-a75cb3825e(_ZN14TilesFramework14send_milestoneERK11xlog_fields+0x128) [0x559a5090f4a8]: TilesFramework::send_milestone(xlog_fields const&)
/usr/games/crawl-git-a75cb3825e(_Z14mark_milestoneRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES6_S6_l+0x4c2) [0x559a50456752]: 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-a75cb3825e(_Z13do_crash_dumpv+0x245e) [0x559a502f115e]: do_crash_dump()
/usr/games/crawl-git-a75cb3825e(_Z20crash_signal_handleri+0x1fa) [0x559a502e79ca]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f0cb7df7210]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcb) [0x7f0cb7fb824b]: 
/usr/games/crawl-git-a75cb3825e(+0x42485d) [0x559a502ee85d]: 
/usr/games/crawl-git-a75cb3825e(+0x424b86) [0x559a502eeb86]: 
/usr/games/crawl-git-a75cb3825e(_Z13invis_allowedbPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x525) [0x559a5071cb55]: invis_allowed(bool, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)
/usr/games/crawl-git-a75cb3825e(_ZNK18PotionInvisibility5quaffEb+0x39) [0x559a50721959]: PotionInvisibility::quaff(bool) const
/usr/games/crawl-git-a75cb3825e(_Z12quaff_potionR8item_def+0x9d) [0x559a5072132d]: quaff_potion(item_def&)
/usr/games/crawl-git-a75cb3825e(_Z5drinkP8item_def+0x199) [0x559a504ab4e9]: drink(item_def*)
/usr/games/crawl-git-a75cb3825e(_Z15process_command12command_typeS_+0x1006) [0x559a5092a0f6]: process_command(command_type, command_type)
/usr/games/crawl-git-a75cb3825e(+0xa5d862) [0x559a50927862]: 
/usr/games/crawl-git-a75cb3825e(+0xa5e00d) [0x559a5092800d]: 
/usr/games/crawl-git-a75cb3825e(main+0x1a5) [0x559a50240055]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f0cb7dd80b3]: 
/usr/games/crawl-git-a75cb3825e(_start+0x2e) [0x559a50240b6e]: