Attach (recommended) or Link to PDF file here:  [test.pdf](https://akmer.aikucun.com/a94a8fe5ccb19ba61c4c0873d391e987982fbbd3_1616477914120_83.pdf)


Configuration:
- Web browser and its version: chrome 87.0.4280.88
- Operating system and its version: windows10
- PDF.js version: 2.6.347
- Is a browser extension:

Steps to reproduce the problem:
1. just open 

What is the expected behavior? (add screenshot)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/17724610/112087066-473f8f80-8bc8-11eb-8efb-56139ec42a9c.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

var codeLenCodeLengths = new Uint8Array(codeLenCodeMap.length);
      var i;
      for (i = 0; i < numCodeLenCodes; ++i) {
        codeLenCodeLengths[codeLenCodeMap[i]] = this.getBits(3);
      }
      var codeLenCodeTab = this.generateHuffmanTable(codeLenCodeLengths);
      
      len = 0;
      i = 0;
      var codes = numLitCodes + numDistCodes;
      var codeLengths = new Uint8Array(codes);
      var bitsLength, bitsOffset, what;
      while (i < codes) {
        var code = this.getCode(codeLenCodeTab);
        if (code === 16) {
          bitsLength = 2;
          bitsOffset = 3;
          what = len;
        } else if (code === 17) {
          bitsLength = 3;
          bitsOffset = 3;
          what = len = 0;
        } else if (code === 18) {
          bitsLength = 7;
          bitsOffset = 11;
          what = len = 0;
        } else {
          codeLengths[i++] = len = code;
          continue;