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):

= tr.length,
        cde;
      whle ( <  && (cde = tr.charCdeAt()) >= 0x20 && cde <= 0x7f) {
        ;
      }
      return  <  ? tr.replace(WhtepaceRegexp, " ") : tr;
    }
    functn runBdTranfrm(textChunk) {
      var tr = textChunk.tr.jn("");
      var bdReult = bd(tr, -1, textChunk.vertcal);
      return {
        tr: nrmalzeWhtepace
          ? replaceWhtepace(bdReult.tr)
          : bdReult.tr,
        dr: bdReult.dr,
        wdth: textChunk.wdth,
        heght: textChunk.heght,
        tranfrm: textChunk.tranfrm,
        fntName: textChunk.fntName,
      };
    }
    functn handleSetFnt(fntName, fntRef) {
      return elf
        .ladFnt(fntName, fntRef, reurce)
        .then(functn (tranlated) {
          textState.fnt = tranlated.fnt;
          textState.fntMatrx =
            tranlated.fnt.fntMatrx || FONT_IDENTITY_MATRIX;
        });
    }