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 (j = 0; j < n; j++) {
                stack.push(data[i++]);
              }
            }
          } else if ((op & 0xf8) === 0xb8) {
            
            n = op - 0xb8 + 1;
            if (inFDEF || inELSE) {
              i += n * 2;
            } else {
              for (j = 0; j < n; j++) {
                b = data[i++];
                stack.push((b << 8) | data[i++]);
              }
            }
          } else if (op === 0x2b && !tooComplexToFollowFunctions) {
            
            if (!inFDEF && !inELSE) {
              
              funcId = stack[stack.length - 1];
              if (isNaN(funcId)) {
                info("TT: CALL empty stack (or invalid entry).");
              } else {
                ttContext.functionsUsed[funcId] = true;
                if (funcId in ttContext.functionsStackDeltas) {
                  const newStackLength =
                    stack.length + ttContext.functionsStackDeltas[funcId];
                  if (newStackLength < 0) {
                    warn("TT: CALL invalid functions stack delta.");
                    ttContext.hintsValid = false;