Attach (recommended) or Link to PDF file here:
[test.pdf](https://github.com/mozilla/pdf.js/files/6270827/test.pdf)
Configuration:
- Web browser and its version:chrome 89
- Operating system and its version:win10
- PDF.js version: 2.4/2.7/2.8 no working
- Is a browser extension: no 

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/18545199/113852392-1ae26080-97cf-11eb-9dc9-0cecf52d267b.png)

What went wrong? (add screenshot)
![1617791294(1)](https://user-images.githubusercontent.com/18545199/113852355-10c06200-97cf-11eb-8672-598750f1093a.jpg)


console this log : **FormatError: TrueType Collection does not contain "DCWGQU+CambriaMath" font** 

any solution?thanks
}
    
    
    if (codes.length === 0) {
      codes.push({ fontCharCode: 0, glyphId: 0 });
    }
    codes.sort(function fontGetRangesSort(a, b) {
      return a.fontCharCode - b.fontCharCode;
    });
    
    var ranges = [];
    var length = codes.length;
    for (var n = 0; n < length; ) {
      var start = codes[n].fontCharCode;
      var codeIndices = [codes[n].glyphId];
      ++n;
      var end = start;
      while (n < length && end + 1 === codes[n].fontCharCode) {
        codeIndices.push(codes[n].glyphId);
        ++end;
        ++n;
        if (end === 0xffff) {
          break;
        }
      }
      ranges.push([start, end, codeIndices]);
    }
    return ranges;
  }
  function createCmapTable(glyphs, numGlyphs) {