if r.Name.Kind == "type" {
				r.Context = ctxType
				if r.Name.Type == nil {
					error_(r.Pos(), "invalid conversion to C.%s: undefined C type '%s'", fixGo(r.Name.Go), r.Name.C)
				}
				break
			}
			error_(r.Pos(), "call of non-function C.%s", fixGo(r.Name.Go))
			break
		}
		if r.Context == ctxCall2 {
			if builtinDefs[r.Name.Go] != "" {
				error_(r.Pos(), "no two-result form for C.%s", r.Name.Go)