anchor.diff:  
   format_errors(Config, _MainSource, Extra, Errors) ->
       [begin
  -         AbsSource = case rebar_utils:processing_base_dir(Config) of
  -                         true ->
  -                             Source;
  -                         false ->
  -                             filename:absname(Source)
  -                     end,
  +         AbsSource = maybe_absname(Config, Source),
            [format_error(AbsSource, Extra, Desc) || Desc <- Descs]
        end
        || {Source, Descs} <- Errors].
  
positive.code: format_error(AbsSource, Extra, {Mod, Desc}) ->
      ErrorDesc = Mod:format_error(Desc),
      ?FMT("~s: ~s~s~n", [AbsSource, Extra, ErrorDesc]).
  
negative.code:             Jobs = rebar:get_jobs(Config),
              ?DEBUG("Starting ~B compile worker(s)~n", [Jobs]),
              Pids = [spawn_monitor(F) || _I <- lists:seq(1,Jobs)],
              compile_queue(Config, Pids, RestFiles)
      end.
  
  run(Config, FirstFiles, SourceDir, SourceExt, TargetDir, TargetExt,
  