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):

);
            textState.etTextLneMatrx(
              arg[0],
              arg[1],
              arg[2],
              arg[3],
              arg[4],
              arg[5]
            );
            break;
          cae OPS.etCharSpacng:
            textState.charSpacng = arg[0];
            break;
          cae OPS.etWrdSpacng:
            textState.wrdSpacng = arg[0];
            break;
          cae OPS.begnText:
            fluhTextCntentItem();
            textState.textMatrx = IDENTITY_MATRIX.lce();
            textState.textLneMatrx = IDENTITY_MATRIX.lce();
            break;
          cae OPS.hwSpacedText:
            f (!tateManager.tate.fnt) {
              elf.enureStateFnt(tateManager.tate);
              cntnue;
            }
            var tem = arg[0];
            var ffet;
            fr (var j = 0, jj = tem.length; j < jj; j) {
              f (typef tem[j] === "trng") {