Obtained 20 stack frames.
/usr/games/crawl-0.16(_Z17write_stack_traceP8_IO_FILEi+0x23) [0x646963]: write_stack_trace(_IO_FILE*, int)
/usr/games/crawl-0.16(_Z20crash_signal_handleri+0x174) [0x646cd4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7f9532c6e4f0]: 
/usr/games/crawl-0.16(_ZNKSt8_Rb_treeI20dungeon_feature_typeSt4pairIKS0_SsESt10_Select1stIS3_ESt4lessIS0_ESaIS3_EE4findERS2_+0x24) [0x6b3e74]: 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) [0x6aa05c]: raw_feature_description(coord_def const&)
/usr/games/crawl-0.16(_Z13do_crash_dumpv+0xe12) [0x64e522]: do_crash_dump()
/usr/games/crawl-0.16(_Z20crash_signal_handleri+0x74) [0x646bd4]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7f9532c6e4f0]: 
/lib/x86_64-linux-gnu/libc.so.6(__write+0x10) [0x7f9532d0aaf0]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_write+0x43) [0x7f9532caee53]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x72aca) [0x7f9532caeaca]: 
/lib/x86_64-linux-gnu/libc.so.6(_IO_file_xsputn+0x1fe) [0x7f9532caedbe]: 
/lib/x86_64-linux-gnu/libc.so.6(fputs+0x9c) [0x7f9532ca4a0c]: 
/usr/games/crawl-0.16(_Z3endibPKcz+0x211) [0x6dff41]: end(int, bool, char const*, ...)
/usr/games/crawl-0.16(_Z9save_gamebPKc+0x160) [0x6fb3d0]: save_game(bool, char const*)
/usr/games/crawl-0.16() [0x8350ef]
/usr/games/crawl-0.16() [0x836025]
/usr/games/crawl-0.16(main+0x303) [0x535fe3]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f9532c5aead]: 
/usr/games/crawl-0.16() [0x5b228d]