
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)


if (properties.hasIncludedToUnicodeMap) {
    return; 
  }
  if (properties.hasEncoding) {
    return; 
  }
  if (builtInEncoding === properties.defaultEncoding) {
    return; 
  }
  if (properties.toUnicode instanceof IdentityToUnicodeMap) {
    return;
  }
  var toUnicode = [],
    glyphsUnicodeMap = getGlyphsUnicode();
  for (var charCode in builtInEncoding) {
    var glyphName = builtInEncoding[charCode];
    var unicode = getUnicodeForGlyph(glyphName, glyphsUnicodeMap);
    if (unicode !== -1) {
      toUnicode[charCode] = String.fromCharCode(unicode);
    }
  }
  properties.toUnicode.amend(toUnicode);
}
function getFontType(type, subtype) {