Obtained 26 stack frames.
/usr/games/crawl-git-92835e5c71(_Z17write_stack_traceP8_IO_FILE+0x3b) [0x55b1114725cb]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-92835e5c71(_Z20crash_signal_handleri+0x1e5) [0x55b111472a75]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7f9f88b35f20]: 
/lib/x86_64-linux-gnu/libc.so.6(sigprocmask+0xd) [0x7f9f88b3614d]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xac) [0x7f9f88b3776c]: 
/usr/games/crawl-git-92835e5c71(+0x39a3b0) [0x55b11147a3b0]: 
/usr/games/crawl-git-92835e5c71(+0x39a765) [0x55b11147a765]: 
/usr/games/crawl-git-92835e5c71(+0x987dc3) [0x55b111a67dc3]: 
/usr/games/crawl-git-92835e5c71(_ZN14TilesFramework14send_milestoneERK11xlog_fields+0x128) [0x55b111a68598]: TilesFramework::send_milestone(xlog_fields const&)
/usr/games/crawl-git-92835e5c71(_Z14mark_milestoneRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES6_S6_l+0x4ea) [0x55b1115cf45a]: 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-92835e5c71(_Z13do_crash_dumpv+0x1ea1) [0x55b11147c761]: do_crash_dump()
/usr/games/crawl-git-92835e5c71(_Z20crash_signal_handleri+0xae) [0x55b11147293e]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7f9f88b35f20]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xc7) [0x7f9f88efa727]: 
/usr/games/crawl-git-92835e5c71(+0x39a3ab) [0x55b11147a3ab]: 
/usr/games/crawl-git-92835e5c71(+0x39a765) [0x55b11147a765]: 
/usr/games/crawl-git-92835e5c71(_Z13invis_allowedbPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x556) [0x55b111862a16]: invis_allowed(bool, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)
/usr/games/crawl-git-92835e5c71(_ZNK18PotionInvisibility5quaffEb+0x39) [0x55b11187a2b9]: PotionInvisibility::quaff(bool) const
/usr/games/crawl-git-92835e5c71(_Z12quaff_potionR8item_def+0x9d) [0x55b111879cad]: quaff_potion(item_def&)
/usr/games/crawl-git-92835e5c71(_Z5drinkP8item_def+0x289) [0x55b11161e7f9]: drink(item_def*)
/usr/games/crawl-git-92835e5c71(_Z15process_command12command_typeS_+0x1103) [0x55b111a80fe3]: process_command(command_type, command_type)
/usr/games/crawl-git-92835e5c71(+0x99efb1) [0x55b111a7efb1]: 
/usr/games/crawl-git-92835e5c71(+0x99f94d) [0x55b111a7f94d]: 
/usr/games/crawl-git-92835e5c71(main+0x39b) [0x55b1113cb33b]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f9f88b18b97]: 
/usr/games/crawl-git-92835e5c71(_start+0x2a) [0x55b1113cbb7a]: