Obtained 21 stack frames.
/usr/games/crawl-git-fa20dd96a1(_Z17write_stack_traceP8_IO_FILE+0x3b) [0x55e83567f12b]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-fa20dd96a1(_Z20crash_signal_handleri+0x1e5) [0x55e83567f5d5]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7fbc84315f20]: 
/usr/games/crawl-git-fa20dd96a1(_Z23raw_feature_descriptionB5cxx11RK9coord_def+0x5f) [0x55e8356fad8f]: raw_feature_description[abi:cxx11](coord_def const&)
/usr/games/crawl-git-fa20dd96a1(_Z13do_crash_dumpv+0x2273) [0x55e835689693]: do_crash_dump()
/usr/games/crawl-git-fa20dd96a1(_Z20crash_signal_handleri+0xae) [0x55e83567f49e]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7fbc84315f20]: 
/usr/games/crawl-git-fa20dd96a1(_Z7calc_hpbb+0x5f) [0x55e835a85cff]: calc_hp(bool, bool)
/usr/games/crawl-git-fa20dd96a1(_Z24check_skill_level_change10skill_typeb+0x38e) [0x55e835afb3ce]: check_skill_level_change(skill_type, bool)
/usr/games/crawl-git-fa20dd96a1(_Z12fixup_skillsv+0x6c) [0x55e835afb9fc]: fixup_skills()
/usr/games/crawl-git-fa20dd96a1(_Z17change_species_to12species_type+0x335) [0x55e835aff8c5]: change_species_to(species_type)
/usr/games/crawl-git-fa20dd96a1(+0x8beae7) [0x55e835b9eae7]: 
/usr/games/crawl-git-fa20dd96a1(_Z8tag_readR6reader8tag_type+0x3999) [0x55e835ba3229]: tag_read(reader&, tag_type)
/usr/games/crawl-git-fa20dd96a1(+0x475674) [0x55e835755674]: 
/usr/games/crawl-git-fa20dd96a1(+0x478fb3) [0x55e835758fb3]: 
/usr/games/crawl-git-fa20dd96a1(_Z12restore_gameRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x1f) [0x55e835759ddf]: restore_game(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-git-fa20dd96a1(_Z12startup_stepv+0x143b) [0x55e835b6604b]: startup_step()
/usr/games/crawl-git-fa20dd96a1(+0x9b61d0) [0x55e835c961d0]: 
/usr/games/crawl-git-fa20dd96a1(main+0x3a7) [0x55e8355d69a7]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7fbc842f8b97]: 
/usr/games/crawl-git-fa20dd96a1(_start+0x2a) [0x55e8355d71da]: