Java 8 syntax change between b63 and b65

[Frank Ding]

Hi guys,
I noticed there is a change in Java 8 between b63 and b65. The change 
can be illustrated by compiling following Issue class.

public class Issue {
interface Handler {
public void handle();
}

interface Listener {
public void listen();
}

Handler handlerImpl = new Handler() {
public void listen(Object... obj) {
// do nothing
}

@Override
public void handle() {
new Listener() {

@Override
public void listen() {
listen(null);
}
};
}
};
}

With OpenJDK 8 b65, compilation goes well whereas b63 failed, 
complaining that

Issue.java:22: error: method listen in class <anonymous Listener> cannot 
be applied to given types;
listen(null);
^
required: no arguments
found: <null>
reason: actual and formal argument lists differ in length
1 error

Could anybody kindly take a look at it and point out what Oracle bug or 
feature has been built into b65 which is not available in b63? It would 
be very helpful.

Best regards,
Frank