r io.Reader
}

func (dr delayedEOFReader) Read(p []byte) (n int, err error) {
	n, err = dr.r.Read(p)
	if n > 0 && err == io.EOF {
		err = nil
	}
	return
}

func TestIssue10884_MaxBytesEOF(t *testing.T) {
	dst := io.Discard
	_, err := io.Copy(dst, MaxBytesReader(
		responseWriterJustWriter{dst},
		io.NopCloser(delayedEOFReader{strings.NewReader("12345")}),
		5))
	if err != nil {