Obtained 19 stack frames.
/usr/games/crawl-git-6bac3391df(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x602be3]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-git-6bac3391df(_Z20crash_signal_handleri+0x174) [0x602f54]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7f88841b44f0]: 
/usr/games/crawl-git-6bac3391df(_ZNKSt8_Rb_treeI20dungeon_feature_typeSt4pairIKS0_SsESt10_Select1stIS3_ESt4lessIS0_ESaIS3_EE4findERS2_+0x24) [0x664e84]: 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-6bac3391df(_Z23raw_feature_descriptionRK9coord_def+0x7c) [0x65c3dc]: raw_feature_description(coord_def const&)
/usr/games/crawl-git-6bac3391df(_Z13do_crash_dumpv+0xd0a) [0x60a33a]: do_crash_dump()
/usr/games/crawl-git-6bac3391df(_Z20crash_signal_handleri+0x74) [0x602e54]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7f88841b44f0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7f8884250af0]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7f88841f4e53]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x72aca) [0x7f88841f4aca]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x1fe) [0x7f88841f4dbe]: 
/lib/x86_64-linux-gnu/libc.so.6(fputs+0x9c) [0x7f88841eaa0c]: 
/usr/games/crawl-git-6bac3391df(_Z3endibPKcz+0x20b) [0x69a2cb]: end(int, bool, char const*, ...)
/usr/games/crawl-git-6bac3391df(_Z9save_gamebPKc+0x1b5) [0x6afda5]: save_game(bool, char const*)
/usr/games/crawl-git-6bac3391df() [0x7c887d]
/usr/games/crawl-git-6bac3391df(main+0x5f5) [0x4fe075]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f88841a0ead]: 
/usr/games/crawl-git-6bac3391df() [0x570a59]