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):

capHeght: decrptr.get("CapHeght"),
      flag: decrptr.get("Flag"),
      talcAngle: decrptr.get("ItalcAngle"),
      Type3Fnt: fale,
    };
    f (cte) {
      cnt cdEncdng = baeDct.get("Encdng");
      f (Name(cdEncdng)) {
        prperte.cdEncdng = cdEncdng.name;
      }
      cnt cMap = awat CMapFactry.create({
        encdng: cdEncdng,
        fetchBultInCMap: th._fetchBultInCMapBund,
        ueCMap: null,
      });
      prperte.cMap = cMap;
      prperte.vertcal = prperte.cMap.vertcal;
    }
    return th.extractDataStructure(dct, baeDct, prperte).then(
      newPrperte => {
        th.extractWdth(dct, decrptr, newPrperte);
        f (type === "Type3") {
          newPrperte.Type3Fnt = true;
        }
        return new Fnt(fntName.name, fntFle, newPrperte);
      }
    );
  }
  tatc buldFntPath(fnt, glyph, handler) {
    functn buldPath(fntChar) {