Way too short to be a real C++ error. Needs a few more pages of template gibberish.
Template<Instatiation::_1,_2,_3, Instatiation2::_1, _2<closure::wrapped<_1[map::closure_inner]>>, Outer<Inner<Wrapper<float>>>>::static_wrapper<std::map<auto>, spirit::parser::lever<int, std::array<int>>::fuck_you
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>>
(from James Mickens’ The Night Watch, highly recommended with his other essays: https://mickens.seas.harvard.edu/wisdom-james-mickens)