This program fails to compile after JDK-JDK-8147493:

abstract class Test {

 interface R<E> {}
 interface Q<T> {}
 interface T { <E> Q<E> n(R<E> r); }
 abstract <T> T isA(Class<T> t);
 abstract <T> S<T> w(T t);
 interface S<T> { S<T> t(T value); }

 void f(T t, Q<String> q) {
   w(t.n(isA(R.class))).t(q);
 }
}


error: incompatible types: Q<String> cannot be converted to Q<Object>
   w(t.n(isA(R.class))).t(q);