Attach (recommended) or Link to PDF file here:
[双引号不正常.pdf](https://github.com/mozilla/pdf.js/files/3533108/default.pdf)


Configuration:
- Web browser and its version:  IE11 , chrome 
- Operating system and its version:  win7
- PDF.js version:  master
- Is a browser extension: nothing 
teps to reproduce the problem:
1. viewer.html web  online preview


What is the expected behavior? (add screenshot)
Displayed in normal characters.

What went wrong? (add screenshot)
![20190823143813](https://user-images.githubusercontent.com/6269307/63571860-062e6600-c5b4-11e9-9fff-75d65cf6bade.png)

Not only the two characters I took screenshots, but also a lot of garbled Chinese punctuation. For example, the Chinese 《》 symbol. But these garbled characters only appear in some specific very old pdf files.

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):nothing 

} else if (flag & 32) {
          yLength = 0;
        }
        const xyLength = xLength + yLength;
        coordinatesLength += xyLength;
        if (flag & 8) {
          const repeat = glyf[j++];
          i += repeat;
          coordinatesLength += repeat * xyLength;
        }
      }
      
      if (coordinatesLength === 0) {
        return glyphProfile;
      }
      let glyphDataLength = j + coordinatesLength;
      if (glyphDataLength > glyf.length) {
        
        return glyphProfile;
      }
      if (!hintsValid && instructionsLength > 0) {
        dest.set(glyf.subarray(0, instructionsStart), destStart);
        dest.set([0, 0], destStart + instructionsStart);
        dest.set(
          glyf.subarray(instructionsEnd, glyphDataLength),
          destStart + instructionsStart + 2
        );
        glyphDataLength -= instructionsLength;
        if (glyf.length - glyphDataLength > 3) {
          glyphDataLength = (glyphDataLength + 3) & ~3;