submitter report:
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came across a strange problem when serialising and deserialising records.
The application seems to hang. Consider the following example.

---
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.io.Serializable;
import java.util.List;

public class Example {

    record Moon(String name) {}

    record Planet(String name, List<Moon> moons) implements Serializable {}

    public static void main(final String[] args) throws IOException, ClassNotFoundException {
        try (PipedInputStream pipe = new PipedInputStream();
             ObjectOutputStream out = new ObjectOutputStream(new PipedOutputStream(pipe));
             ObjectInputStream in = new ObjectInputStream(pipe)) {
            Planet earth = new Planet("Terra", List.of(new Moon("Luna")));
            out.writeObject(earth);
            out.flush();

            Object o = in.readObject();
            System.out.println(o);
        }
    }
}
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The Moon record does not implement Serializable on purpose. Here I was
expecting an exception to be thrown, but instead the program hangs. If the
Moon record implements Serializable then the program works well.

Am I doing something wrong?
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