Obtained 20 stack frames.
/usr/games/crawl-0.16(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x646a53]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-0.16(_Z20crash_signal_handleri+0x174) [0x646dc4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x33060) [0x7fd1f58da060]: 
/usr/games/crawl-0.16(_ZNKSt8_Rb_treeI20dungeon_feature_typeSt4pairIKS0_SsESt10_Select1stIS3_ESt4lessIS0_ESaIS3_EE4findERS2_+0x24) [0x6b4044]: 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-0.16(_Z23raw_feature_descriptionRK9coord_def+0x7c) [0x6aa22c]: raw_feature_description(coord_def const&)
/usr/games/crawl-0.16(_Z13do_crash_dumpv+0xe12) [0x64e612]: do_crash_dump()
/usr/games/crawl-0.16(_Z20crash_signal_handleri+0x74) [0x646cc4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x33060) [0x7fd1f58da060]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7fd1f5982730]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x37) [0x7fd1f5919817]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x71b62) [0x7fd1f5918b62]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x16e) [0x7fd1f5919f6e]: 
/lib/x86_64-linux-gnu/libc.so.6(fputs+0xbf) [0x7fd1f590e96f]: 
/usr/games/crawl-0.16(_Z3endibPKcz+0x211) [0x6e01a1]: end(int, bool, char const*, ...)
/usr/games/crawl-0.16(_Z9save_gamebPKc+0x160) [0x6fa820]: save_game(bool, char const*)
/usr/games/crawl-0.16() [0x835593]
/usr/games/crawl-0.16() [0x836335]
/usr/games/crawl-0.16(main+0x303) [0x5360f3]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1) [0x7fd1f58c72e1]: 
/usr/games/crawl-0.16() [0x5b23ac]