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, "breakBefore",  true);
    this.id = attributes.id || "";
    this.leader = attributes.leader || "";
    this.startNew = getInteger({
      data: attributes.startNew,
      defaultValue: 0,
      validate: x => x === 1,
    });
    this.target = attributes.target || "";
    this.targetType = getStringOption(attributes.targetType, [
      "auto",
      "contentArea",
      "pageArea",
      "pageEven",
      "pageOdd",
    ]);
    this.trailer = attributes.trailer || "";
    this.use = attributes.use || "";
    this.usehref = attributes.usehref || "";
    this.script = null;
  }
  [$toHTML](availableSpace) {
    this[$extra] = {};
    return HTMLResult.FAILURE;
  }
}
class Button extends XFAObject {