The following code is flagged as dead (since it's *replacing* rather than updating the existing Object):
https://github.com/mozilla/pdf.js/blob/4483cba72410027acf46630ebf252ae529704476/src/core/xfa/template.js#L2336-L2339
according to the alert in https://github.com/mozilla/pdf.js/security/code-scanning/103?query=ref%3Arefs%2Fheads%2Fmaster

Looking at the surrounding code, I can see a couple of possibilities here:
 1. This is indeed just dead code, which should be removed.
 2. The code should be moved up, and placed just *above* the previous block instead.
 3. There should be other, more invasive, changes made to this code...

/cc @calixteman Which solution is correct here?
Assuming it's either option 1 or 2, I can submit a patch to fix this.
let buffer =
      this[$globalData].images && this[$globalData].images.get(this.href);
    if (!buffer && (this.href || !this[$content])) {
      
      
      return HTMLResult.EMPTY;
    }
    if (!buffer && this.transferEncoding === "base64") {
      buffer = stringToBytes(atob(this[$content]));
    }
    if (!buffer) {
      return HTMLResult.EMPTY;
    }
    
    const blob = new Blob([buffer], { type: this.contentType });
    let style;
    switch (this.aspect) {
      case "fit":
      case "actual":
        
        
        
        break;
      case "height":