
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)


buffers.push(currentBuf.join(""));
              currentBuf.length = 0;
            }
            const charCodeLength = this.cMap
              ? this.cMap.getCharCodeLength(charCode)
              : 1;
            for (let j = charCodeLength - 1; j >= 0; j--) {
              currentBuf.push(
                String.fromCharCode((charCode >> (8 * j)) & 0xff)
              );
            }
            continue;
          }
        }
        
        if (!hasCurrentBufErrors()) {
          buffers.push(currentBuf.join(""));
          currentBuf.length = 0;
        }
        currentBuf.push(String.fromCodePoint(unicode));
      }
      buffers.push(currentBuf.join(""));
      return buffers;
    },
  };
  return Font;
})();
var ErrorFont = (function ErrorFontClosure() {
  
  function ErrorFont(error) {