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 Encrypt(attrs);
  }
  static encryptData(attrs) {
    return new EncryptData(attrs);
  }
  static encryption(attrs) {
    return new Encryption(attrs);
  }
  static encryptionMethod(attrs) {
    return new EncryptionMethod(attrs);
  }
  static encryptionMethods(attrs) {
    return new EncryptionMethods(attrs);
  }
  static event(attrs) {
    return new Event(attrs);
  }
  static exData(attrs) {
    return new ExData(attrs);
  }
  static exObject(attrs) {
    return new ExObject(attrs);
  }
  static exclGroup(attrs) {
    return new ExclGroup(attrs);
  }
  static execute(attrs) {
    return new Execute(attrs);
  }
  static extras(attrs) {