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.
case operators.dotHash:
        children = root[$getChildrenByClass](name);
        if (children instanceof XFAObjectArray) {
          children = children.children;
        } else {
          children = [children];
        }
        break;
      default:
        break;
    }
    if (children.length === 0) {
      return createNodes(root, parsed.slice(i));
    }
    if (index < children.length) {
      const child = children[index];
      if (!(child instanceof XFAObject)) {
        warn(`XFA - Cannot create a node.`);
        return null;
      }
      root = child;
    } else {
      parsed[i].index = children.length - index;
      return createNodes(root, parsed.slice(i));
    }
  }
  return null;
}
export { createDataNode, searchNode };