Attach (recommended) or Link to PDF file here:
See pdf in https://github.com/mozilla/pdf.js/issues/3109

Configuration:
- Web browser and its version: Firefox nightly
- Operating system and its version: Windows 10
- PDF.js version: builtin viewer

Steps to reproduce the problem:
1. Look at outlines

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/141514798-0e656865-1cbf-4fb8-a89b-530d36da23c9.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/141514740-c95e0237-8bf4-4129-a4a5-cb2ea5a3f4df.png)

if (
    typeof PDFJSDev === "undefined" ||
    PDFJSDev.test("!PRODUCTION || TESTING")
  ) {
    assert(
      typeof value === "number" && Math.abs(value) < 2 ** 32,
      `string32: Unexpected input "${value}".`
    );
  }
  return String.fromCharCode(
    (value >> 24) & 0xff,
    (value >> 16) & 0xff,
    (value >> 8) & 0xff,
    value & 0xff
  );
}
function objectSize(obj) {
  return Object.keys(obj).length;
}
function objectFromMap(map) {
  const obj = Object.create(null);
  for (const [key, value] of map) {
    obj[key] = value;
  }
  return obj;
}
function isLittleEndian() {