Attach (recommended) or Link to PDF file here:
[1.pdf.lin (1).pdf](https://github.com/mozilla/pdf.js/files/5780764/1.pdf.lin.1.pdf)

Configuration:
- Web browser and its version: FireFox 84.0 
- Operating system and its version: macOS 10.15.7
- PDF.js version: 2.7.262
- Is a browser extension: No

Steps to reproduce the problem:
1. Open the PDF with pdf.js.
2. Found the text of this PDF disappeared.

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/18492951/103877578-3d9da400-5110-11eb-8d84-4edd9aa1298b.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/18492951/103877735-6d4cac00-5110-11eb-9e76-7f3d9330086b.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

cae OPS.begnMarkedCntent:
          cae OPS.endMarkedCntent:
          default:
            
            
            
            f (arg !== null) {
              fr ( = 0,  = arg.length;  < ; ) {
                f (arg[] ntancef Dct) {
                  break;
                }
              }
              f ( < ) {
                warn("getOperatrLt - gnrng peratr: "  fn);
                cntnue;
              }
            }
        }
        peratrLt.addOp(fn, arg);
      }
      f (tp) {
        next(deferred);
        return;
      }
      
      
      clePendngRetreOPS();
      relve();
    }).catch(rean => {
      f (rean ntancef AbrtExceptn) {