java 10 fuckery

import java.io.*;

class Fuckery {
    public static void main(String[] args) throws IOException, ClassNotFoundException {
        var lambda = (Runnable & Serializable)() -> System.out.println("Hi");

        var out = new ByteArrayOutputStream();
        var oos = new ObjectOutputStream(out);
        oos.writeObject(lambda);
        oos.close();

        var in = new ObjectInputStream(new ByteArrayInputStream(out.toByteArray()));
        var lambda2 = (Runnable) in.readObject();
        in.close();

        lambda2.run();
    }
}