Attach (recommended) or Link to PDF file here:
https://www.nta.go.jp/taxes/tetsuzuki/shinsei/annai/joyaku/annai/pdf2/250.pdf

Configuration:
- Web browser and its version: Firefox 81.0a1
- Operating system and its version: Debian 5.6.7-1
- PDF.js version: latest in Firefox nightly
- Is a browser extension: No

Steps to reproduce the problem:
1. Open the pdf and paste the following text "本 店 又 は 主 た る 事 務 所 の 所 在 地" in "Full name" and in "Domicile and residence" textfields
2. Print or Save the pdf 

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/91207547-30f05480-e709-11ea-9abd-2af5d970dc46.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/91207663-69902e00-e709-11ea-8a1d-1ddd30cf0621.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

if (!dupFirstEntry) {
        glyphZeroId = 0;
      }
      
      var newMapping = adjustMapping(charCodeToGlyphId, hasGlyph, glyphZeroId);
      this.toFontChar = newMapping.toFontChar;
      tables.cmap = {
        tag: "cmap",
        data: createCmapTable(newMapping.charCodeToGlyphId, numGlyphsOut),
      };
      if (!tables["OS/2"] || !validateOS2Table(tables["OS/2"], font)) {
        tables["OS/2"] = {
          tag: "OS/2",
          data: createOS2Table(
            properties,
            newMapping.charCodeToGlyphId,
            metricsOverride
          ),
        };
      }
      if (!isTrueType) {
        try {
          
          cffFile = new Stream(tables["CFF "].data);
          var parser = new CFFParser(
            cffFile,
            properties,
            SEAC_ANALYSIS_ENABLED
          );
          cff = parser.parse();