Text Extraction - NullReferenceException is raised on an attempt to execute the PdfDocumentProcessor.GetText method for a document area that does not contain text

Hi there.

I have an issue with a PdfDocumentProcessor.

I simply want to check if a first page of a PdfDocument contains only one picture an no text.
I then do following…

C#
var processor = new PdfDocumentProcessor();  

processor.LoadDocument(pdfDocument);  
var page = processor.Document.Pages[0];  
var areaWholePage = new PdfDocumentArea(pageNumber, page.MediaBox);  
var images = processor.GetImages(areaWholePage);  
var texts = processor.GetText(areaWholePage);  

on

C#
var texts = processor.GetText(areaWholePage);  

processor fails with a NullReferenceException.

With a little debugging and reflection i can now do the following

C#
var dataSelector = (PdfDataSelector)typeof(PdfDocumentProcessor).GetField("dataSelector", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(processor);  
 var textSelector = (PdfTextSelector)typeof(PdfDataSelector).GetField("textSelector", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(dataSelector);  

var selection = textSelector.GetSelection(areaWholePage);  

Now returned selection is null and theoretically a sign there is no text on page?
I am not sure if this is the right way to check that.

Do i use PdfDocumentProcessor wrong or it is possibly a bug?

Thank you in advance