Attach (recommended) or Link to PDF file here:
PDF from #4106, https://mail.gnome.org/archives/evince-list/2013-November/pdfNC0hkVW67a.pdf.

Steps to reproduce the problem:
1. Open the PDF

What is the expected behavior?
![immagine](https://user-images.githubusercontent.com/1616846/121865567-67ca4200-ccfe-11eb-8673-1d6e863fc8d5.png)

What went wrong?
The PDF doesn't load, `TypeError: can't access property Symbol(), match is null` error is logged in the console.
if (parent instanceof PageSet) {
        return parent[$getNextPage]();
      }
      return this[$getNextPage]();
    }
    const pageNumber = getRoot(this)[$extra].pageNumber;
    const parity = pageNumber % 2 === 0 ? "even" : "odd";
    const position = pageNumber === 0 ? "first" : "rest";
    let page = this.pageArea.children.find(
      p => p.oddOrEven === parity && p.pagePosition === position
    );
    if (page) {
      return page;
    }
    page = this.pageArea.children.find(
      p => p.oddOrEven === "any" && p.pagePosition === position
    );
    if (page) {
      return page;
    }
    page = this.pageArea.children.find(
      p => p.oddOrEven === "any" && p.pagePosition === "any"
    );
    if (page) {
      return page;
    }
    return this.pageArea.children[0];
  }
}
class Para extends XFAObject {