{V(BytesChan(nil)), V(BytesChan(nil))},
	{V(BytesChanRecv(nil)), V(BytesChanRecv(nil))},
	{V(BytesChanSend(nil)), V(BytesChanSend(nil))},

	// interfaces
	{V(int(1)), EmptyInterfaceV(int(1))},
	{V(string("hello")), EmptyInterfaceV(string("hello"))},
	{V(new(bytes.Buffer)), ReaderV(new(bytes.Buffer))},
	{ReadWriterV(new(bytes.Buffer)), ReaderV(new(bytes.Buffer))},
	{V(new(bytes.Buffer)), ReadWriterV(new(bytes.Buffer))},