(as reported by a colleague)

When a NetworkInterface does not (yet) have any addresses, then getInterfaceAddresses should return an empty list, but it throws NullPointerException instead.

public class EmptyNetworkInterface {
    public static void main(String[] args) throws Exception {
        // throws NPE
        new java.net.MulticastSocket()
            .getNetworkInterface()
            .getInterfaceAddresses();
    }
}

Exception in thread "main" java.lang.NullPointerException
at java.base/java.net.NetworkInterface.getInterfaceAddresses(NetworkInterface.java:179)

Colleague's suggested fix:
@@ -90,6 +90,7 @@ public final class NetworkInterface {
         this.name = name;
         this.index = index;
         this.addrs = addrs;
+ this.bindings = new InterfaceAddress[0];
     }

     /**

(or add more null checks?)