anchor.diff:      }
   
       errorSubscription = errorReceivePort.listen((e) async {
  +      print('ERROR from worker isolate #$workerIndex: $e');
         logger.severe('ERROR from worker isolate #$workerIndex', e);
         await close();
         // restart isolate after a brief pause
  
positive.code:     });
    }
  
    await withAppEngineServices(() async {
      if (frontendEntryPoint != null) {
        for (int i = 0; i < envConfig.frontendCount; i++) {
          await startFrontendIsolate();
        }
      }
      if (workerEntryPoint != null) {
        if (workerSetup != null) {
          try {
            await workerSetup();
          } catch (e, st) {
            logger.severe('Failed to setup worker.', e, st);
            rethrow;
          }
        }
        for (int i = 0; i < envConfig.workerCount; i++) {
          await startWorkerIsolate();
        }
      }
    });
  }
  
  void setupServiceIsolate() {
  
negative.code:     }
  
      errorSubscription = errorReceivePort.listen((e) async {
        print('ERROR from frontend isolate #$frontendIndex: $e');
        logger.severe('ERROR from frontend isolate #$frontendIndex', e);
        await close();
        // restart isolate after a brief pause
  