checker/tests/interning/TestInfer.java

// Test case for issue #238: https://github.com/typetools/checker-framework/issues/238

import java.util.ArrayList;
import java.util.List;

class TestInfer1 {
  <T> T getValue(List<T> l) {
    return l.get(0);
  }

  void bar(Object o) {}

  void foo() {
    List<?> ls = new ArrayList<>();
    bar(getValue(ls));
  }
}

class TestInfer2 {
  <T extends String> T getValue(List<T> l) {
    return l.get(0);
  }

  void bar(String o) {}

  void foo() {
    List<? extends String> ls = new ArrayList<>();
    bar(getValue(ls));
  }
}