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):

if (i === 0 && entry.free && first === 1) {
            first = 0;
          }
          if (!this.entries[i + first]) {
            this.entries[i + first] = entry;
          }
        }
        tableState.entryNum = 0;
        tableState.streamPos = stream.pos;
        tableState.parserBuf1 = parser.buf1;
        tableState.parserBuf2 = parser.buf2;
        delete tableState.firstEntryNum;
        delete tableState.entryCount;
      }
      
      if (this.entries[0] && !this.entries[0].free) {
        throw new FormatError("Invalid XRef table: unexpected first object");
      }
      return obj;
    },
    processXRefStream: function XRef_processXRefStream(stream) {
      if (!("streamState" in this)) {
        
        
        var streamParameters = stream.dict;
        var byteWidths = streamParameters.get("W");
        var range = streamParameters.get("Index");
        if (!range) {