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.
return new RefElement(attrs);
  }
  static script(attrs) {
    return new Script(attrs);
  }
  static setProperty(attrs) {
    return new SetProperty(attrs);
  }
  static signData(attrs) {
    return new SignData(attrs);
  }
  static signature(attrs) {
    return new Signature(attrs);
  }
  static signing(attrs) {
    return new Signing(attrs);
  }
  static solid(attrs) {
    return new Solid(attrs);
  }
  static speak(attrs) {
    return new Speak(attrs);
  }
  static stipple(attrs) {
    return new Stipple(attrs);
  }
  static subform(attrs) {
    return new Subform(attrs);
  }
  static subformSet(attrs) {