
Attach (recommended) or Link to PDF file here:
[NAPEN16171380959.pdf](https://github.com/mozilla/pdf.js/files/6143802/NAPEN16171380959.pdf)

Configuration:
- Web browser and its version: Firefox 88 Nightly
- Operating system and its version: Windows 10
- PDF.js version:
- Is a browser extension: No

What went wrong? (add screenshot)
![](https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2021-03-15-10-58-27-ce2796.png)


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          for (var j = value.length - 1; j > 0; j--) {
            value[j] -= value[j - 1]; 
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        }
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      cff.topDict.privateDict = privateDict;
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        subrIndex.add(subrs[i]);
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      privateDict.subrsIndex = subrIndex;
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      return compiler.compile();
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  return Type1Font;
})();
var CFFFont = (function CFFFontClosure() {
  
  function CFFFont(file, properties) {