anchor.diff:          Callback,
           Sorted,
           Extra}) ->
  -    Stale = case {Stable, Update} of
  -            {true, false} -> ok;
  -            {true, lazy} -> update_after;
  -            {_, _} -> false
  +    {Stable, Update} = case Stale of
  +        ok -> {true, false};
  +        update_after -> {true, lazy};
  +        _ -> {false, true}
       end,
       #mrargs{
           view_type = ViewType,
  
positive.code:         Skip,
          GroupLevel,
          Group,
          Stable,
          Update,
          MultiGet,
          InclusiveEnd,
          IncludeDocs,
  
negative.code:         skip = Skip,
          group_level = GroupLevel,
          group = Group,
          stable = Stable,
          update = Update,
          multi_get = MultiGet,
          inclusive_end = InclusiveEnd,
          include_docs = IncludeDocs,
  