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 (
        !this.xref.stream.allChunksLoaded ||
        this.xref.stream.allChunksLoaded()
      ) {
        return undefined;
      }
      const { keys, dict } = this;
      this.refSet = new RefSet();
      
      const nodesToVisit = [];
      for (let i = 0, ii = keys.length; i < ii; i++) {
        const rawValue = dict.getRaw(keys[i]);
        
        if (rawValue !== undefined) {
          nodesToVisit.push(rawValue);
        }
      }
      return this._walk(nodesToVisit);
    },
    async _walk(nodesToVisit) {
      const nodesToRevisit = [];
      const pendingRequests = [];