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):

}
    this.codeSize = 0;
    this.codeBuf = 0;
    DecodeStream.call(this, maybeLength);
  }
  FlateStream.prototype = Object.create(DecodeStream.prototype);
  FlateStream.prototype.getBits = function FlateStream_getBits(bits) {
    var str = this.str;
    var codeSize = this.codeSize;
    var codeBuf = this.codeBuf;
    var b;
    while (codeSize < bits) {
      if ((b = str.getByte()) === -1) {
        throw new FormatError("Bad encoding in flate stream");
      }
      codeBuf |= b << codeSize;
      codeSize += 8;
    }
    b = codeBuf & ((1 << bits) - 1);
    this.codeBuf = codeBuf >> bits;
    this.codeSize = codeSize -= bits;
    return b;
  };
  FlateStream.prototype.getCode = function FlateStream_getCode(table) {
    var str = this.str;
    var codes = table[0];
    var maxLen = table[1];
    var codeSize = this.codeSize;
    var codeBuf = this.codeBuf;
    var b;