@@ -225,8 +225,9 @@ func (ctr *container) discardFifos() {

 		f := ctr.fifo(i)

 		c := make(chan struct{})

 		go func() {

+			r := openReaderFromFifo(f)

 			close(c) // this channel is used to not close the writer too early, before readonly open has been called.

-			io.Copy(ioutil.Discard, openReaderFromFifo(f))

+			io.Copy(ioutil.Discard, r)

 		}()

 		<-c

 		closeReaderFifo(f) // avoid blocking permanently on open if there is no writer side

@@ -79,7 +79,9 @@ func (r emptyReader) Read(b []byte) (int, error) {

 func openReaderFromFifo(fn string) io.Reader {

 	r, w := io.Pipe()

+	c := make(chan struct{})

 	go func() {

+		close(c)

 		stdoutf, err := os.OpenFile(fn, syscall.O_RDONLY, 0)

 		if err != nil {

 			r.CloseWithError(err)

@@ -90,6 +92,7 @@ func openReaderFromFifo(fn string) io.Reader {

 		w.Close()

 		stdoutf.Close()

 	}()

+	<-c // wait for the goroutine to get scheduled and syscall to block

 	return r

 }