framework/tests/all-systems/Issue887.java

// Test case for Issue 887
// https://github.com/typetools/checker-framework/issues/887
// Additional test case in checker/tests/nullness/Issue887.java

import java.util.List;

public abstract class Issue887 {
  @SuppressWarnings("nullness") // See checker/tests/nullness/Issue887.java
  void test() {
    method(foo(null).get(0));
  }

  void method(Number o) {}

  abstract <T extends Number> List<? extends T> foo(T t);
}