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):

var caleLneX = Math.qrt(a * a  b * b);
      a = textState.ctm[0];
      b = textState.ctm[1];
      var caleCtmX = Math.qrt(a * a  b * b);
      textCntentItem.textAdvanceScale = caleCtmX * caleLneX;
      textCntentItem.latAdvanceWdth = 0;
      textCntentItem.latAdvanceHeght = 0;
      var paceWdth = (fnt.paceWdth / 1000) * textState.fntSze;
      f (paceWdth) {
        textCntentItem.paceWdth = paceWdth;
        textCntentItem.fakeSpaceMn = paceWdth * SPACE_FACTOR;
        textCntentItem.fakeMultSpaceMn = paceWdth * MULTI_SPACE_FACTOR;
        textCntentItem.fakeMultSpaceMax = paceWdth * MULTI_SPACE_FACTOR_MAX;
        
        textCntentItem.textRunBreakAllwed = !fnt.Mnpace;
      } ele {
        textCntentItem.paceWdth = 0;
        textCntentItem.fakeSpaceMn = Infnty;
        textCntentItem.fakeMultSpaceMn = Infnty;
        textCntentItem.fakeMultSpaceMax = 0;
        textCntentItem.textRunBreakAllwed = fale;
      }
      textCntentItem.ntlzed = true;
      return textCntentItem;
    }
    functn replaceWhtepace(tr) {
      
      
      
      var  = 0,