Obtained 25 stack frames.
/usr/games/crawl-git-830294a5c2(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x5cb3375b245f]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-830294a5c2(_Z20crash_signal_handleri+0x196) [0x5cb3375b28f6]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x744883b45330]: 
/usr/games/crawl-git-830294a5c2(_Z12dgn_vault_at9coord_def+0x42) [0x5cb337678012]: dgn_vault_at(coord_def)
/usr/games/crawl-git-830294a5c2(_Z23raw_feature_descriptionB5cxx11RK9coord_def+0x55) [0x5cb337657fd5]: raw_feature_description[abi:cxx11](coord_def const&)
/usr/games/crawl-git-830294a5c2(_Z13do_crash_dumpv+0x2237) [0x5cb3375c24e7]: do_crash_dump()
/usr/games/crawl-git-830294a5c2(_Z20crash_signal_handleri+0x1fa) [0x5cb3375b295a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x744883b45330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x744883b9eb2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x744883b4527e]: 
/usr/games/crawl-git-830294a5c2(+0x562abd) [0x5cb3375bfabd]: 
/usr/games/crawl-git-830294a5c2(_Z12AssertFailedPKcS0_iS0_z+0x1c7) [0x5cb3375bffc7]: AssertFailed(char const*, char const*, int, char const*, ...)
/usr/games/crawl-git-830294a5c2(_ZNK9PlaceInfo15assert_validityEv+0xfe) [0x5cb337ab400e]: PlaceInfo::assert_validity() const
/usr/games/crawl-git-830294a5c2(_ZN6player14set_place_infoE9PlaceInfo+0x12) [0x5cb337ab43c2]: player::set_place_info(PlaceInfo)
/usr/games/crawl-git-830294a5c2(+0xbf385b) [0x5cb337c5085b]: 
/usr/games/crawl-git-830294a5c2(_Z8tag_readR6reader8tag_type+0x170) [0x5cb337c6f970]: tag_read(reader&, tag_type)
/usr/games/crawl-git-830294a5c2(+0x66c727) [0x5cb3376c9727]: 
/usr/games/crawl-git-830294a5c2(+0x66e966) [0x5cb3376cb966]: 
/usr/games/crawl-git-830294a5c2(_Z12restore_gameRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x23) [0x5cb3376cca03]: restore_game(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-git-830294a5c2(_Z12startup_stepv+0x947) [0x5cb337c19e47]: startup_step()
/usr/games/crawl-git-830294a5c2(+0xd4cb7d) [0x5cb337da9b7d]: 
/usr/games/crawl-git-830294a5c2(main+0x1f7) [0x5cb3374e0c97]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x744883b2a1ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x744883b2a28b]: 
/usr/games/crawl-git-830294a5c2(_start+0x25) [0x5cb3374e1785]: