File: Demo.java


public class Demo {
    public static void main(String[] args) {
        for (int i = 0; i < 10; i++) {
            Runnable r = () -> System.out.println(i);
            r.run();
            break;
        }
    }
}

Expected: compilation failure (as "i" is not effectively final)
Observed: javac compiles without error.

Source: compiler-dev email

https://mail.openjdk.org/pipermail/compiler-dev/2022-September/020481.html