Syntax error: unmatched thing in thing from std::nonstd::__map<_Cyrillic, _$$$dollars>const basic_string<epic_mystery,mongoose_traits<char>,__default_alloc_<cas

Syntax error: unmatched thing in thing from std::nonstd::__map<_Cyrillic, _$$$dollars>const basic_string<epic_mystery,mongoose_traits<char>,__default_alloc_<casual_Fridays = maybe>>