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):

for (
          let glyphId = 0, charstringsLen = charstrings.length;
          glyphId < charstringsLen;
          glyphId++
        ) {
          const charCode = properties.cMap.charCodeOf(glyphId);
          
          charCodeToGlyphId[charCode] = glyphId + 1;
        }
        return charCodeToGlyphId;
      }
      var glyphNames = [".notdef"],
        glyphId;
      for (glyphId = 0; glyphId < charstrings.length; glyphId++) {
        glyphNames.push(charstrings[glyphId].glyphName);
      }
      var encoding = properties.builtInEncoding;
      if (encoding) {
        var builtInEncoding = Object.create(null);
        for (var charCode in encoding) {
          glyphId = glyphNames.indexOf(encoding[charCode]);
          if (glyphId >= 0) {
            builtInEncoding[charCode] = glyphId;
          }
        }
      }
      return type1FontGlyphMapping(properties, builtInEncoding, glyphNames);
    },
    hasGlyphId: function Type1Font_hasGlyphID(id) {
      if (id < 0 || id >= this.numGlyphs) {