Attach (recommended) or Link to PDF file here:
[test.pdf](https://github.com/mozilla/pdf.js/files/6715502/test.pdf)

Configuration:
- Web browser and its version: Google Chrome Version 91.0.4472.114 
- Operating system and its version: Windows 10 Enterprise
- PDF.js version: 
- Is a browser extension: yes

Steps to reproduce the problem:
1. download file
2. open file



What is the expected behavior? (add screenshot)
show symbol
![image](https://user-images.githubusercontent.com/50500976/123409847-55ca8800-d5b7-11eb-9e5b-c7f3b33c00e1.png)

What went wrong? (add screenshot)
Does not show symbol
![image](https://user-images.githubusercontent.com/50500976/123409707-274cad00-d5b7-11eb-9a64-b11dcf3cdc3f.png)
Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension): Latest Version Chrome extension

if (privateUseAreaIndex >= PRIVATE_USE_AREAS.length) {
        warn("Ran out of space in font private use area.");
        break;
      }
      nextAvailableFontCharCode = PRIVATE_USE_AREAS[privateUseAreaIndex][0];
      privateUseOffetEnd = PRIVATE_USE_AREAS[privateUseAreaIndex][1];
    }
    const fontCharCode = nextAvailableFontCharCode++;
    if (glyphId === 0) {
      glyphId = newGlyphZeroId;
    }
    newMap[fontCharCode] = glyphId;
    toFontChar[originalCharCode] = fontCharCode;
  }
  return {
    toFontChar,
    charCodeToGlyphId: newMap,
    nextAvailableFontCharCode,
  };
}
function getRanges(glyphs, numGlyphs) {
  
  
  const codes = [];
  for (const charCode in glyphs) {
    
    if (glyphs[charCode] >= numGlyphs) {
      continue;
    }
    codes.push({ fontCharCode: charCode | 0, glyphId: glyphs[charCode] });