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):

const objId = currentNode.objId;
          if (objId && !pageKidsCountCache.has(objId)) {
            pageKidsCountCache.put(objId, count);
          }
          
          if (currentPageIndex + count <= pageIndex) {
            currentPageIndex += count;
            continue;
          }
        }
        const kids = currentNode.get("Kids");
        if (!Array.isArray(kids)) {
          
          
          
          if (
            isName(currentNode.get("Type"), "Page") ||
            (!currentNode.has("Type") && currentNode.has("Contents"))
          ) {
            if (currentPageIndex === pageIndex) {
              capability.resolve([currentNode, null]);
              return;
            }
            currentPageIndex++;
            continue;
          }
          capability.reject(
            new FormatError("Page dictionary kids object is not an array.")
          );
          return;