Obtained 20 stack frames.
/usr/games/crawl-git-2f7cafc865(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x564c8c7424ef]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-2f7cafc865(_Z20crash_signal_handleri+0x18f) [0x564c8c74290f]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f9d02002210]: 
/usr/games/crawl-git-2f7cafc865(_Z12dgn_vault_at9coord_def+0x42) [0x564c8c7f44a2]: dgn_vault_at(coord_def)
/usr/games/crawl-git-2f7cafc865(_Z23raw_feature_descriptionB5cxx11RK9coord_def+0x5e) [0x564c8c7d3fde]: raw_feature_description[abi:cxx11](coord_def const&)
/usr/games/crawl-git-2f7cafc865(_Z13do_crash_dumpv+0x2103) [0x564c8c74e673]: do_crash_dump()
/usr/games/crawl-git-2f7cafc865(_Z20crash_signal_handleri+0x1fa) [0x564c8c74297a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f9d02002210]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcb) [0x7f9d021c324b]: 
/usr/games/crawl-git-2f7cafc865(+0x4c50cd) [0x564c8c74c0cd]: 
/usr/games/crawl-git-2f7cafc865(+0x4c5285) [0x564c8c74c285]: 
/usr/games/crawl-git-2f7cafc865(_Z9save_gamebPKc+0x967) [0x564c8c83b717]: save_game(bool, char const*)
/usr/games/crawl-git-2f7cafc865(_Z21check_selected_skillsv+0x260) [0x564c8cc81f00]: check_selected_skills()
/usr/games/crawl-git-2f7cafc865(+0x5b18bf) [0x564c8c8388bf]: 
/usr/games/crawl-git-2f7cafc865(_Z12restore_gameRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x21) [0x564c8c839081]: restore_game(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-git-2f7cafc865(_Z12startup_stepv+0x1531) [0x564c8cd07781]: startup_step()
/usr/games/crawl-git-2f7cafc865(+0xbde4cf) [0x564c8ce654cf]: 
/usr/games/crawl-git-2f7cafc865(main+0x1ab) [0x564c8c688a4b]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f9d01fe30b3]: 
/usr/games/crawl-git-2f7cafc865(_start+0x2e) [0x564c8c68961e]: