Obtained 19 stack frames.
/usr/games/crawl-git-3b8412344a(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x602473]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-git-3b8412344a(_Z20crash_signal_handleri+0x174) [0x6027e4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7fec1f4554f0]: 
/usr/games/crawl-git-3b8412344a(_ZNKSt8_Rb_treeI20dungeon_feature_typeSt4pairIKS0_SsESt10_Select1stIS3_ESt4lessIS0_ESaIS3_EE4findERS2_+0x24) [0x664634]: 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-3b8412344a(_Z23raw_feature_descriptionRK9coord_def+0x7c) [0x65bb9c]: raw_feature_description(coord_def const&)
/usr/games/crawl-git-3b8412344a(_Z13do_crash_dumpv+0xcda) [0x609b5a]: do_crash_dump()
/usr/games/crawl-git-3b8412344a(_Z20crash_signal_handleri+0x74) [0x6026e4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7fec1f4554f0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7fec1f4f1af0]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7fec1f495e53]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x72aca) [0x7fec1f495aca]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x1fe) [0x7fec1f495dbe]: 
/lib/x86_64-linux-gnu/libc.so.6(fputs+0x9c) [0x7fec1f48ba0c]: 
/usr/games/crawl-git-3b8412344a(_Z3endibPKcz+0x20b) [0x699b4b]: end(int, bool, char const*, ...)
/usr/games/crawl-git-3b8412344a(_Z9save_gamebPKc+0x1b5) [0x6af605]: save_game(bool, char const*)
/usr/games/crawl-git-3b8412344a() [0x7c732d]
/usr/games/crawl-git-3b8412344a(main+0x5f5) [0x4fde95]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7fec1f441ead]: 
/usr/games/crawl-git-3b8412344a() [0x5703c9]