Obtained 21 stack frames.
/usr/games/crawl-0.18(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x5bf333]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-0.18(_Z20crash_signal_handleri+0x1a5) [0x5bf6d5]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7ff9e86b64c0]: 
/usr/games/crawl-0.18(_Z23raw_feature_descriptionRK9coord_def+0x4b) [0x61fd5b]: raw_feature_description(coord_def const&)
/usr/games/crawl-0.18(_Z13do_crash_dumpv+0xe6e) [0x5c718e]: do_crash_dump()
/usr/games/crawl-0.18(_Z20crash_signal_handleri+0x9c) [0x5bf5cc]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7ff9e86b64c0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7ff9e8a4cb7b]: 
/usr/games/crawl-0.18() [0x5c5de9]
/usr/games/crawl-0.18() [0x5c6091]
/usr/games/crawl-0.18(_ZNK9PlaceInfo15assert_validityEv+0x8f) [0x93690f]: PlaceInfo::assert_validity() const
/usr/games/crawl-0.18(_ZN6player14set_place_infoE9PlaceInfo+0xe) [0x94b8ce]: player::set_place_info(PlaceInfo)
/usr/games/crawl-0.18(_Z8tag_readR6reader8tag_type+0x6079) [0xa4a959]: tag_read(reader&, tag_type)
/usr/games/crawl-0.18() [0x67b68b]
/usr/games/crawl-0.18() [0x67d17c]
/usr/games/crawl-0.18(_Z12restore_gameRKSs+0xa) [0x67d81a]: restore_game(std::string const&)
/usr/games/crawl-0.18(_Z12startup_stepv+0xf4f) [0xa183bf]: startup_step()
/usr/games/crawl-0.18() [0xb74de6]
/usr/games/crawl-0.18(main+0x2eb) [0xb785fb]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7ff9e86a176d]: 
/usr/games/crawl-0.18() [0x51b719]