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.
const style = toStyle(this, "border", "margin");
    const ui = this[$getParent]();
    const field = ui[$getParent]();
    const children = [];
    if (field.items.children.length > 0) {
      const displayed = field.items.children[0][$toHTML]().html;
      const values = field.items.children[1]
        ? field.items.children[1][$toHTML]().html
        : [];
      for (let i = 0, ii = displayed.length; i < ii; i++) {
        children.push({
          name: "option",
          attributes: {