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.
delete this[$extra];
      
      return HTMLResult.empty;
    }
    style.width = measureToString(this[$extra].width);
    style.height = measureToString(this[$extra].height);
    const html = {
      name: "div",
      attributes,
      children,
    };
    const bbox = [this.x, this.y, this[$extra].width, this[$extra].height];
    delete this[$extra];
    return HTMLResult.success(html, bbox);
  }
}
class Assist extends XFAObject {
  constructor(attributes) {
    super(TEMPLATE_NS_ID, "assist",  true);
    this.id = attributes.id || "";
    this.role = attributes.role || "";
    this.use = attributes.use || "";
    this.usehref = attributes.usehref || "";
    this.speak = null;
    this.toolTip = null;
  }
}
class Barcode extends XFAObject {