ObjectAccessor throws ArgumentOutOfRangeException when accessing private members

[dotnetchris]

Failing test attached

    public class ObjectAccessorPrivateAccessTest
    {
        [Test]
        public void Fails_when_accessing_private_field()
        {
            var token = new Wrapper<Bar>(new Bar {Title = "#1 Title", Url = "#1 Url"});

            var @public = 
                        ObjectAccessor.Create(token.Item, true)["DebuggerDisplay"];
            var @private = 
                        ObjectAccessor.Create(token.Item, true)["DebuggerDisplayPrivate"];
        }

        [DebuggerDisplay("{DebuggerDisplay,nq}")]
        public class Wrapper<T>
        {
            public Wrapper(T item)
            {
                Item = item;
            }

            public T Item { get; }
            public double Score { get; set; }

            private string DebuggerDisplay => 
            $"Score = {Score}, {ObjectAccessor.Create(Item, true)["DebuggerDisplay"]}";
        }

        [DebuggerDisplay("{DebuggerDisplay,nq}")]
        public class Bar
        {
            public string Url { get; set; }
            public string Title { get; set; }

            private string DebuggerDisplayPrivate => $"Title = {Title}, Url = {Url}";
            public string DebuggerDisplay => $"Title = {Title}, Url = {Url}";
        }
    }

[alexb5dh]

Related: #9