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.
defaultValue: 0,
      validate: x => x === 1,
    });
    this.rowColumnRatio = getRatio(attributes.rowColumnRatio);
    this.startChar = attributes.startChar || "";
    this.textLocation = getStringOption(attributes.textLocation, [
      "below",
      "above",
      "aboveEmbedded",
      "belowEmbedded",
      "none",
    ]);
    this.truncate = getInteger({
      data: attributes.truncate,
      defaultValue: 0,
      validate: x => x === 1,
    });
    this.type = getStringOption(
      attributes.type ? attributes.type.toLowerCase() : "",
      [
        "aztec",
        "codabar",
        "code2of5industrial",
        "code2of5interleaved",
        "code2of5matrix",
        "code2of5standard",
        "code3of9",
        "code3of9extended",
        "code11",
        "code49",