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.
attributes.style.display = "flex";
        attributes.style.flexDirection = "column";
        switch (this.para.vAlign) {
          case "top":
            attributes.style.justifyContent = "start";
            break;
          case "bottom":
            attributes.style.justifyContent = "end";
            break;
          case "middle":
            attributes.style.justifyContent = "center";
            break;
        }
        const paraStyle = this.para[$toStyle]();
        if (!value.attributes.style) {
          value.attributes.style = paraStyle;
        } else {
          for (const [key, val] of Object.entries(paraStyle)) {
            if (!(key in value.attributes.style)) {
              value.attributes.style[key] = val;
            }
          }
        }
      }
    }
    return HTMLResult.success(createWrapper(this, html), bbox);
  }
}
class Edge extends XFAObject {