
Attach (recommended) or Link to PDF file here:
[NAPEN16171380959.pdf](https://github.com/mozilla/pdf.js/files/6143802/NAPEN16171380959.pdf)

Configuration:
- Web browser and its version: Firefox 88 Nightly
- Operating system and its version: Windows 10
- PDF.js version:
- Is a browser extension: No

What went wrong? (add screenshot)
![](https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2021-03-15-10-58-27-ce2796.png)


if (ttContext.tooComplexToFollowFunctions) {
          return;
        }
        if (ttContext.functionsDefined.length > maxFunctionDefs) {
          warn("TT: more functions defined than expected");
          ttContext.hintsValid = false;
          return;
        }
        for (var j = 0, jj = ttContext.functionsUsed.length; j < jj; j++) {
          if (j > maxFunctionDefs) {
            warn("TT: invalid function id: " + j);
            ttContext.hintsValid = false;
            return;
          }
          if (ttContext.functionsUsed[j] && !ttContext.functionsDefined[j]) {
            warn("TT: undefined function: " + j);
            ttContext.hintsValid = false;
            return;
          }
        }
      }
      function foldTTTable(table, content) {