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.
break;
      case "(":
        
        
        
        
        operator = operators.dotParen;
        break;
      default:
        operator = operators.dot;
        break;
    }
    match = expr.slice(pos).match(namePattern);
    if (!match) {
      break;
    }
    [name] = match;
    pos += name.length;
    parsed.push({
      name,
      cacheName: expr.slice(spos, pos),
      operator,
      index: 0,
      js: null,
      formCalc: null,
    });
  }
  return parsed;
}
function searchNode(