FileCorrupted exception on docx

I’m getting a FileCorruptedException when reading the attached document (whose main feature is a table of contents) with Can you tell me what’s wrong?

Thanks for your request. I managed to reproduce this problem and I created new issue #5018 in our defect database. I will notify you as soon as it is fixed.
Best regards.

The issues you have found earlier (filed as 5018) have been fixed in this update.