import org.checkerframework.checker.nullness.qual.*;

public class Wellformed {
  // :: error: (conflicting.annos)
  @NonNull @Nullable Object f = null;

  // :: error: (conflicting.annos)
  class Gen1a<T extends @NonNull @Nullable Object> {}

  class Gen1b {
    // :: error: (conflicting.annos)
    <T extends @NonNull @Nullable Object> void m(T p) {}
    // :: error: (conflicting.annos)
    <@NonNull @Nullable T> void m2(T p) {}
  }
  // :: error: (conflicting.annos)
  class Gen1c<@NonNull @Nullable TTT> {}

  class Gen2a<@Nullable T> {}

  // :: error: (bound)
  class Gen2b<@Nullable T extends Object> {}

  // :: error: (bound)
  class Gen2c<@Nullable T extends @NonNull Object> {}

  class Gen3a<T> {
    @Nullable T f;

    @Nullable T get() {
      return null;
    }
  }

  class Gen3b<T extends @NonNull Object> {
    @Nullable T f;

    @Nullable T get() {
      return null;
    }
  }

  class Gen4<T extends @Nullable Object> {
    // :: error: (initialization.field.uninitialized)
    @NonNull T f;

    @NonNull T get() {
      throw new RuntimeException();
    }

    void set(@NonNull T p) {}
  }

  class Gen5a<T extends @Nullable Object> {}

  class Gen5b<S> extends Gen5a<@Nullable Object> {}

  class Gen5c<S> extends Gen5a<@Nullable S> {}

  class Gen6a<T extends Object> {}
  // :: error: (type.argument)
  class Gen6b<S> extends Gen6a<@Nullable Object> {}
  // :: error: (type.argument)
  class Gen6c<S> extends Gen6a<@Nullable S> {}
}