https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61321
--- Comment #13 from Ian Lance Taylor <ian at airs dot com> --- Was the symbol from comment #12, _ZSt7forwardIRKZN5Write14DataMapGrammarISt20back_insert_iteratorISsEEC4EvEUlRT_E_EOS5_RNSt16remove_referenceIS5_E4typeE, generated by g++ or clang? That is, is it supposed to demangle? If so, do you have the source code?
