Implement Generic Interface

Main.java

public class Main {

  public static void main(String[] args) {
    MyInterface i = new MyImplementer();
    i.foo(1);
    /*
    Since we actually call the vulnerable method, the call chain that we expect is:

    Main.main(String[] args): 5
      -> MyImplementer.foo(Integer): 36
        -> MyImplementer.vulnerableMethod()

    But what we are getting is this:
    Main.main(String[] args): 5
      -> MyImplementer.foo(Object): 27
        -> MyImplementer.foo(Integer): 36
          -> MyImplementer.vulnerableMethod()
     */
  }
}

/*
 * This is our vulnerable class
 */
class MyImplementer implements MyInterface<Integer> {
  /*
  After type erasure, the compiler will insert a bridge method that looks like this:
  public void foo(Object o) {
    foo( (Integer) o );
  }
  */
  @Override
  public void foo(Integer i) {
    vulnerableMethod();
  }

  private void vulnerableMethod() {
    throw new UnknownError();
  }
}

interface MyInterface<T> {
  void foo(T t);
}