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):

}
        end = this.bufferLength;
      }
      this.pos = end;
      const subarray = this.buffer.subarray(pos, end);
      
      return forceClamped && !(subarray instanceof Uint8ClampedArray)
        ? new Uint8ClampedArray(subarray)
        : subarray;
    },
    peekByte: function DecodeStream_peekByte() {
      var peekedByte = this.getByte();
      if (peekedByte !== -1) {
        this.pos--;
      }
      return peekedByte;
    },
    peekBytes(length, forceClamped = false) {
      var bytes = this.getBytes(length, forceClamped);
      this.pos -= bytes.length;
      return bytes;
    },
    makeSubStream: function DecodeStream_makeSubStream(start, length, dict) {
      var end = start + length;
      while (this.bufferLength <= end && !this.eof) {
        this.readBlock();
      }
      return new Stream(this.buffer, start, length, dict);
    },
    getByteRange(begin, end) {