// Test case for Issue 1331.
// https://github.com/typetools/checker-framework/issues/1331

import java.util.List;
import java.util.stream.Collectors;

@SuppressWarnings("all") // check for crashes
public class Issue1331 {
  List<Long> ll;
  long result = getOnlyElement(ll.stream().collect(Collectors.toSet()));

  static <T> T getOnlyElement(Iterable<T> iterable) {
    return null;
  }
}