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.
constructor(attributes) {
    super(TEMPLATE_NS_ID, "ref");
    this.id = attributes.id || "";
    this.use = attributes.use || "";
    this.usehref = attributes.usehref || "";
  }
}
class Script extends StringObject {
  constructor(attributes) {
    super(TEMPLATE_NS_ID, "script");
    this.binding = attributes.binding || "";
    this.contentType = attributes.contentType || "";
    this.id = attributes.id || "";
    this.name = attributes.name || "";
    this.runAt = getStringOption(attributes.runAt, [
      "client",
      "both",
      "server",
    ]);
    this.use = attributes.use || "";
    this.usehref = attributes.usehref || "";
  }
}
class SetProperty extends XFAObject {