// Test case for https://tinyurl.com/cfissue/3150 .

import org.checkerframework.checker.nullness.qual.NonNull;
import org.checkerframework.checker.nullness.qual.Nullable;

public class Issue3150 {
  void foo(@Nullable Object nble, @NonNull Object nn) {
    // :: error: (type.argument)
    requireNonNull1(null);
    // :: error: (type.argument)
    requireNonNull1(nble);
    requireNonNull1("hello");
    requireNonNull1(nn);
    // :: error: (argument)
    requireNonNull2(null);
    // :: error: (argument)
    requireNonNull2(nble);
    requireNonNull1("hello");
    requireNonNull1(nn);
  }

  public static <T extends @NonNull Object> T requireNonNull1(T obj) {
    return obj;
  }

  public static <T> @NonNull T requireNonNull2(@NonNull T obj) {
    return obj;
  }
}