Obtained 25 stack frames.
/usr/games/crawl-git-babda3026e(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x56e1d1bb210f]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-babda3026e(_Z20crash_signal_handleri+0x196) [0x56e1d1bb25a6]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x7490301e4330]: 
/usr/games/crawl-git-babda3026e(_Z12dgn_vault_at9coord_def+0x42) [0x56e1d1c77e82]: dgn_vault_at(coord_def)
/usr/games/crawl-git-babda3026e(_Z23raw_feature_descriptionB5cxx11RK9coord_def+0x55) [0x56e1d1c57e45]: raw_feature_description[abi:cxx11](coord_def const&)
/usr/games/crawl-git-babda3026e(_Z13do_crash_dumpv+0x2237) [0x56e1d1bc2197]: do_crash_dump()
/usr/games/crawl-git-babda3026e(_Z20crash_signal_handleri+0x1fa) [0x56e1d1bb260a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x45330) [0x7490301e4330]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x74903023db2c]: 
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x7490301e427e]: 
/usr/games/crawl-git-babda3026e(+0x56176d) [0x56e1d1bbf76d]: 
/usr/games/crawl-git-babda3026e(_Z12AssertFailedPKcS0_iS0_z+0x1c7) [0x56e1d1bbfc77]: AssertFailed(char const*, char const*, int, char const*, ...)
/usr/games/crawl-git-babda3026e(_ZNK9PlaceInfo15assert_validityEv+0xfe) [0x56e1d20b3bee]: PlaceInfo::assert_validity() const
/usr/games/crawl-git-babda3026e(_ZN6player14set_place_infoE9PlaceInfo+0x12) [0x56e1d20b3fa2]: player::set_place_info(PlaceInfo)
/usr/games/crawl-git-babda3026e(+0xbf23db) [0x56e1d22503db]: 
/usr/games/crawl-git-babda3026e(_Z8tag_readR6reader8tag_type+0x170) [0x56e1d226f4f0]: tag_read(reader&, tag_type)
/usr/games/crawl-git-babda3026e(+0x66b597) [0x56e1d1cc9597]: 
/usr/games/crawl-git-babda3026e(+0x66d7d6) [0x56e1d1ccb7d6]: 
/usr/games/crawl-git-babda3026e(_Z12restore_gameRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x23) [0x56e1d1ccc873]: restore_game(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-git-babda3026e(_Z12startup_stepv+0x947) [0x56e1d22199c7]: startup_step()
/usr/games/crawl-git-babda3026e(+0xd4b6fd) [0x56e1d23a96fd]: 
/usr/games/crawl-git-babda3026e(main+0x1f7) [0x56e1d1ae08b7]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca) [0x7490301c91ca]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x7490301c928b]: 
/usr/games/crawl-git-babda3026e(_start+0x25) [0x56e1d1ae13a5]: