Collector start error is never surfaced

[rakyll]

ipp.appDone = make(chan struct{})
	go func() {
		defer close(ipp.appDone)
		appErr := ipp.svc.Run()
		if appErr != nil {
			err = appErr
		}
	}()

The err assignment here can happen after start function returns. This logic won't surface the ipp.svc.Run errors.