namespace Bug
{

  public interface I1
  {
    void P();
  }

  public interface I2
  {
    bool P { get;}
  }

  public delegate void D();

  public class Test<T> where T : I1, I2, new()
  {
    public void F()
    {
      T t = new T();
      t.P();
      D d = t.P;
    }
  }
}