}
		if have, want := buf.String(), nlines(streamEncoded, i); have != want {
			t.Errorf("encoding %d items: mismatch:", i)
			diff(t, []byte(have), []byte(want))
			break
		}
	}
}

func TestEncoderErrorAndReuseEncodeState(t *testing.T) {
	// Disable the GC temporarily to prevent encodeState's in Pool being cleaned away during the test.
	percent := debug.SetGCPercent(-1)
	defer debug.SetGCPercent(percent)