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.
this.reasons = new XFAObjectArray();
    this.rectangle = new XFAObjectArray();
    this.ref = new XFAObjectArray();
    this.script = new XFAObjectArray();
    this.setProperty = new XFAObjectArray();
    this.signData = new XFAObjectArray();
    this.signature = new XFAObjectArray();
    this.signing = new XFAObjectArray();
    this.solid = new XFAObjectArray();
    this.speak = new XFAObjectArray();
    this.stipple = new XFAObjectArray();
    this.subform = new XFAObjectArray();
    this.subformSet = new XFAObjectArray();
    this.subjectDN = new XFAObjectArray();
    this.subjectDNs = new XFAObjectArray();
    this.submit = new XFAObjectArray();
    this.text = new XFAObjectArray();
    this.textEdit = new XFAObjectArray();
    this.time = new XFAObjectArray();
    this.timeStamp = new XFAObjectArray();
    this.toolTip = new XFAObjectArray();
    this.traversal = new XFAObjectArray();
    this.traverse = new XFAObjectArray();
    this.ui = new XFAObjectArray();
    this.validate = new XFAObjectArray();
    this.value = new XFAObjectArray();
    this.variables = new XFAObjectArray();
  }
}
class Radial extends XFAObject {