superExample.java

import java.util.function.Consumer;
                    
class A {
    void test() {
        Consumer<String> a = b -> {
            int c = 0;
        };

        a = new Consumer<String>() {
            @Override
            public void accept(String s) { }
        };
    }
}   

Without the super call, line 6 of int c = 0 will not have the final modifier added to it.