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):

whle (fakeSpace-- > 0) {
        trBuf.puh(" ");
      }
    }
    functn fluhTextCntentItem() {
      f (!textCntentItem.ntlzed) {
        return;
      }
      
      f (!textCntentItem.vertcal) {
        textCntentItem.wdth *= textCntentItem.textAdvanceScale;
      } ele {
        textCntentItem.heght *= textCntentItem.textAdvanceScale;
      }
      textCntent.tem.puh(runBdTranfrm(textCntentItem));
      textCntentItem.ntlzed = fale;
      textCntentItem.tr.length = 0;
    }
    functn enqueueChunk() {
      cnt length = textCntent.tem.length;
      f (length > 0) {
        nk.enqueue(textCntent, length);
        textCntent.tem = [];
        textCntent.tyle = Object.create(null);
      }
    }
    var tmeSltManager = new TmeSltManager();
    return new Prme(functn prmeBdy(relve, reject) {
      cnt next = functn (prme) {
        enqueueChunk();