604   std::vector<const GSS::Node *> NextHeads;  in glrParse()  local
606     assert(NextHeads.empty() && "Running GC at the wrong time!");  in glrParse()
621     glrShift(Heads, Terminals[I], Params, Lang, NextHeads);  in glrParse()
625     if (NextHeads.empty()) {  in glrParse()
628       glrRecover(Heads, I, Params, Lang, NextHeads);  in glrParse()
629       if (NextHeads.empty())  in glrParse()
639     Reduce(NextHeads, Lookahead);  in glrParse()
641     std::swap(Heads, NextHeads);  in glrParse()
642     NextHeads.clear();  in glrParse()
670   glrRecover(Heads, I, Params, Lang, NextHeads);  in glrParse()
671   Reduce(NextHeads, tokenSymbol(tok::eof));  in glrParse()
672   if (auto *Result = SearchForAccept(NextHeads))  in glrParse()