Obtained 22 stack frames.
/usr/games/crawl-git-9df874ce5e(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x5a5033]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-git-9df874ce5e(_Z20crash_signal_handleri+0x1a5) [0x5a53d5]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f6f04fad4c0]: 
/usr/games/crawl-git-9df874ce5e(_ZNKSt8_Rb_treeI20dungeon_feature_typeSt4pairIKS0_SsESt10_Select1stIS3_ESt4lessIS0_ESaIS3_EE4findERS2_+0x24) [0x613fa4]: std::_Rb_tree<dungeon_feature_type, std::pair<dungeon_feature_type const, std::string>, std::_Select1st<std::pair<dungeon_feature_type const, std::string> >, std::less<dungeon_feature_type>, std::allocator<std::pair<dungeon_feature_type const, std::string> > >::find(dungeon_feature_type const&) const
/usr/games/crawl-git-9df874ce5e(_Z23raw_feature_descriptionRK9coord_def+0x7c) [0x6078ec]: raw_feature_description(coord_def const&)
/usr/games/crawl-git-9df874ce5e(_Z13do_crash_dumpv+0xe8e) [0x5ad30e]: do_crash_dump()
/usr/games/crawl-git-9df874ce5e(_Z20crash_signal_handleri+0x9c) [0x5a52cc]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f6f04fad4c0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7f6f0505c100]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7f6f04ff0313]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x791da) [0x7f6f04ff01da]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x23e) [0x7f6f04ff0c8e]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x4d016) [0x7f6f04fc4016]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_vfprintf+0x59e) [0x7f6f04fbec1e]: 
/lib/x86_64-linux-gnu/libc.so.6(__fprintf_chk+0xeb) [0x7f6f0507e8cb]: 
/usr/games/crawl-git-9df874ce5e(_Z3endibPKcz+0x227) [0x642327]: end(int, bool, char const*, ...)
/usr/games/crawl-git-9df874ce5e(_Z9save_gamebPKc+0x160) [0x6640f0]: save_game(bool, char const*)
/usr/games/crawl-git-9df874ce5e() [0x7a7ff3]
/usr/games/crawl-git-9df874ce5e() [0x7a8d95]
/usr/games/crawl-git-9df874ce5e(main+0x2eb) [0x7abd3b]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f6f04f9876d]: 
/usr/games/crawl-git-9df874ce5e() [0x50c609]