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
} else {
          
          
          for (glyphId = 0; glyphId < cff.charStrings.count; glyphId++) {
            charCode = properties.cMap.charCodeOf(glyphId);
            charCodeToGlyphId[charCode] = glyphId;
          }
        }
        return charCodeToGlyphId;
      }
      var encoding = cff.encoding ? cff.encoding.encoding : null;
      charCodeToGlyphId = type1FontGlyphMapping(properties, encoding, charsets);
      return charCodeToGlyphId;
    },
    hasGlyphId: function CFFFont_hasGlyphID(id) {
      return this.cff.hasGlyphId(id);
    },
  };
  return CFFFont;
})();
export {
  ErrorFont,
  Font,
  FontFlags,
  getFontType,
  IdentityToUnicodeMap,
  SEAC_ANALYSIS_ENABLED,
  ToUnicodeMap,
};