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
return false;
      }
      if (id === 0) {
        
        return true;
      }
      var glyph = this.charstrings[id - 1];
      return glyph.charstring.length > 0;
    },
    getSeacs: function Type1Font_getSeacs(charstrings) {
      var i, ii;
      var seacMap = [];
      for (i = 0, ii = charstrings.length; i < ii; i++) {
        var charstring = charstrings[i];
        if (charstring.seac) {
          
          seacMap[i + 1] = charstring.seac;
        }
      }
      return seacMap;
    },
    getType2Charstrings: function Type1Font_getType2Charstrings(
      type1Charstrings
    ) {
      var type2Charstrings = [];
      for (var i = 0, ii = type1Charstrings.length; i < ii; i++) {
        type2Charstrings.push(type1Charstrings[i].charstring);
      }
      return type2Charstrings;
    },