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.
constructor(attributes) {
    super(TEMPLATE_NS_ID, "para",  true);
    this.hAlign = getStringOption(attributes.hAlign, [
      "left",
      "center",
      "justify",
      "justifyAll",
      "radix",
      "right",
    ]);
    this.id = attributes.id || "";
    this.lineHeight = attributes.lineHeight
      ? getMeasurement(attributes.lineHeight, "0pt")
      : "";
    this.marginLeft = attributes.marginLeft
      ? getMeasurement(attributes.marginLeft, "0pt")
      : "";
    this.marginRight = attributes.marginRight
      ? getMeasurement(attributes.marginRight, "0pt")
      : "";
    this.orphans = getInteger({
      data: attributes.orphans,
      defaultValue: 0,
      validate: x => x >= 0,
    });
    this.preserve = attributes.preserve || "";
    this.radixOffset = attributes.radixOffset
      ? getMeasurement(attributes.radixOffset, "0pt")
      : "";
    this.spaceAbove = attributes.spaceAbove