Obtained 23 stack frames.
/usr/games/crawl-git-11d64188ad(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x5cf543]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-git-11d64188ad(_Z20crash_signal_handleri+0x1a5) [0x5cf8e5]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f7bbcb154c0]: 
/usr/games/crawl-git-11d64188ad(_Z23raw_feature_descriptionRK9coord_def+0x4b) [0x63198b]: raw_feature_description(coord_def const&)
/usr/games/crawl-git-11d64188ad(_Z13do_crash_dumpv+0xe6e) [0x5d742e]: do_crash_dump()
/usr/games/crawl-git-11d64188ad(_Z20crash_signal_handleri+0x9c) [0x5cf7dc]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f7bbcb154c0]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0x2b) [0x7f7bbceabb7b]: 
/usr/games/crawl-git-11d64188ad() [0x5d6069]
/usr/games/crawl-git-11d64188ad() [0x5d65b4]
/usr/games/crawl-git-11d64188ad() [0xa8186a]
/usr/games/crawl-git-11d64188ad(_ZN6reader4readEPvm+0x69) [0xa6dc59]: reader::read(void*, unsigned long)
/usr/games/crawl-git-11d64188ad(_ZN7map_def10read_indexER6reader+0x18e) [0x7fe4ae]: map_def::read_index(reader&)
/usr/games/crawl-git-11d64188ad() [0xa733b4]
/usr/games/crawl-git-11d64188ad() [0xa79eea]
/usr/games/crawl-git-11d64188ad(_Z8tag_readR6reader8tag_type+0xf27) [0xa7c817]: tag_read(reader&, tag_type)
/usr/games/crawl-git-11d64188ad() [0x68b7f4]
/usr/games/crawl-git-11d64188ad(_Z10load_level20dungeon_feature_type14load_mode_typeRK8level_id+0x133e) [0x6906ae]: load_level(dungeon_feature_type, load_mode_type, level_id const&)
/usr/games/crawl-git-11d64188ad(_Z12startup_stepv+0x8ac) [0xa4e15c]: startup_step()
/usr/games/crawl-git-11d64188ad() [0xbabf36]
/usr/games/crawl-git-11d64188ad(main+0x2eb) [0xbafb7b]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f7bbcb0076d]: 
/usr/games/crawl-git-11d64188ad() [0x534db9]