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):

file,
        header,
        metrics,
        numGlyphs,
        dupFirstEntry
      ) {
        if (!header) {
          if (metrics) {
            metrics.data = null;
          }
          return;
        }
        file.pos = (file.start ? file.start : 0) + header.offset;
        file.pos += 4; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 2; 
        file.pos += 8; 
        file.pos += 2; 
        var numOfMetrics = file.getUint16();
        if (numOfMetrics > numGlyphs) {
          info(