javac fails the following jacks tests:
8.3.2.3-legal-forward-instance-12
8.3.2.3-legal-forward-instance-13
8.3.2.3-legal-forward-static-9
8.3.2.3-legal-forward-static-10

A typical example is

class T {
int x = (y=1);
int y = 3;
}