Obtained 21 stack frames.
/usr/games/crawl-git-4eb5ad6b2d(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x61ace559374f]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-4eb5ad6b2d(_Z20crash_signal_handleri+0x196) [0x61ace5593be6]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x7ce899442910]: 
/usr/games/crawl-git-4eb5ad6b2d(_Z12dgn_vault_at9coord_def+0x42) [0x61ace5658d32]: dgn_vault_at(coord_def)
/usr/games/crawl-git-4eb5ad6b2d(_Z23raw_feature_descriptionB5cxx11RK9coord_def+0x55) [0x61ace5638cc5]: raw_feature_description[abi:cxx11](coord_def const&)
/usr/games/crawl-git-4eb5ad6b2d(_Z13do_crash_dumpv+0x2237) [0x61ace55a37a7]: do_crash_dump()
/usr/games/crawl-git-4eb5ad6b2d(_Z20crash_signal_handleri+0x1fa) [0x61ace5593c4a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x7ce899442910]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa46f9) [0x7ce8994a46f9]: 
/lib/x86_64-linux-gnu/libc.so.6(+0xa6cb3) [0x7ce8994a6cb3]: 
/lib/x86_64-linux-gnu/libc.so.6(malloc+0x19a) [0x7ce8994a824a]: 
/lib/x86_64-linux-gnu/libstdc++.so.6(_Znwm+0x1c) [0x7ce8998b75ec]
/usr/games/crawl-git-4eb5ad6b2d(_ZN11TravelCache4loadER6readeri+0x72b) [0x61ace5ca717b]: TravelCache::load(reader&, int)
/usr/games/crawl-git-4eb5ad6b2d(+0x6600f5) [0x61ace56ac0f5]: 
/usr/games/crawl-git-4eb5ad6b2d(_Z12restore_gameRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x23) [0x61ace56ace83]: restore_game(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-git-4eb5ad6b2d(_Z12startup_stepv+0x947) [0x61ace5bf38f7]: startup_step()
/usr/games/crawl-git-4eb5ad6b2d(+0xd3376d) [0x61ace5d7f76d]: 
/usr/games/crawl-git-4eb5ad6b2d(main+0x1f7) [0x61ace54c4de7]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x280d0) [0x7ce8994280d0]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x89) [0x7ce899428189]: 
/usr/games/crawl-git-4eb5ad6b2d(_start+0x25) [0x61ace54c58d5]: