
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)


}
        this.toFontChar = buildToFontChar(
          ZapfDingbatsEncoding,
          getDingbatsGlyphsUnicode(),
          this.differences
        );
      } else if (isStandardFont) {
        this.toFontChar = buildToFontChar(
          this.defaultEncoding,
          getGlyphsUnicode(),
          this.differences
        );
      } else {
        const glyphsUnicodeMap = getGlyphsUnicode();
        const map = [];
        this.toUnicode.forEach((charCode, unicodeCharCode) => {
          if (!this.composite) {
            var glyphName =
              this.differences[charCode] || this.defaultEncoding[charCode];
            const unicode = getUnicodeForGlyph(glyphName, glyphsUnicodeMap);
            if (unicode !== -1) {
              unicodeCharCode = unicode;
            }
          }
          map[+charCode] = unicodeCharCode;
        });
        
        
        if (this.composite && this.toUnicode instanceof IdentityToUnicodeMap) {
          if (/Verdana/i.test(name)) {