Obtained 22 stack frames.
/usr/games/crawl-git-f98af59671(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x5a7903]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-git-f98af59671(_Z20crash_signal_handleri+0x1a5) [0x5a7ca5]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f974306f4c0]: 
/usr/games/crawl-git-f98af59671(_ZNKSt8_Rb_treeI20dungeon_feature_typeSt4pairIKS0_SsESt10_Select1stIS3_ESt4lessIS0_ESaIS3_EE4findERS2_+0x24) [0x617504]: 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-f98af59671(_Z23raw_feature_descriptionRK9coord_def+0x7c) [0x60bf4c]: raw_feature_description(coord_def const&)
/usr/games/crawl-git-f98af59671(_Z13do_crash_dumpv+0xe8e) [0x5afbbe]: do_crash_dump()
/usr/games/crawl-git-f98af59671(_Z20crash_signal_handleri+0x9c) [0x5a7b9c]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x364c0) [0x7f974306f4c0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7f974311e100]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7f97430b2313]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x791da) [0x7f97430b21da]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x23e) [0x7f97430b2c8e]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x4d016) [0x7f9743086016]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_vfprintf+0x59e) [0x7f9743080c1e]: 
/lib/x86_64-linux-gnu/libc.so.6(__fprintf_chk+0xeb) [0x7f97431408cb]: 
/usr/games/crawl-git-f98af59671(_Z3endibPKcz+0x227) [0x6463a7]: end(int, bool, char const*, ...)
/usr/games/crawl-git-f98af59671(_Z9save_gamebPKc+0x160) [0x667180]: save_game(bool, char const*)
/usr/games/crawl-git-f98af59671() [0x7a7263]
/usr/games/crawl-git-f98af59671() [0x7a8025]
/usr/games/crawl-git-f98af59671(main+0x2eb) [0x7aafbb]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f974305a76d]: 
/usr/games/crawl-git-f98af59671() [0x50b879]