Obtained 22 stack frames.
/usr/games/crawl-bcadren(_Z17write_stack_traceP8_IO_FILE+0x3b) [0x55898dfb277b]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-bcadren(_Z20crash_signal_handleri+0x1e5) [0x55898dfb2c25]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7f5d2056bf20]: 
/usr/games/crawl-bcadren(_Z23raw_feature_descriptionB5cxx11RK9coord_def+0x5f) [0x55898e02a4df]: raw_feature_description[abi:cxx11](coord_def const&)
/usr/games/crawl-bcadren(_Z13do_crash_dumpv+0x2537) [0x55898dfbd7b7]: do_crash_dump()
/usr/games/crawl-bcadren(_Z20crash_signal_handleri+0xae) [0x55898dfb2aee]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7f5d2056bf20]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xc7) [0x7f5d20930727]: 
/usr/games/crawl-bcadren(+0x396d6b) [0x55898dfbad6b]: 
/usr/games/crawl-bcadren(+0x396fde) [0x55898dfbafde]: 
/usr/games/crawl-bcadren(+0x73cc77) [0x55898e360c77]: 
/usr/games/crawl-bcadren(+0x749754) [0x55898e36d754]: 
/usr/games/crawl-bcadren(_Z22remove_slime_mutationsv+0xb8) [0x55898e36e178]: remove_slime_mutations()
/usr/games/crawl-bcadren(_Z8tag_readR6reader8tag_type+0x2122) [0x55898e4f5ef2]: tag_read(reader&, tag_type)
/usr/games/crawl-bcadren(+0x4673d5) [0x55898e08b3d5]: 
/usr/games/crawl-bcadren(+0x4681d2) [0x55898e08c1d2]: 
/usr/games/crawl-bcadren(_Z12restore_gameRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x1f) [0x55898e08cebf]: restore_game(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
/usr/games/crawl-bcadren(_Z12startup_stepv+0x1468) [0x55898e4bbf88]: startup_step()
/usr/games/crawl-bcadren(+0x9b8df9) [0x55898e5dcdf9]: 
/usr/games/crawl-bcadren(main+0x323) [0x55898df001f3]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f5d2054eb97]: 
/usr/games/crawl-bcadren(_start+0x2a) [0x55898df008fa]: