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.
const style = toStyle(this, "hAlign");
    if (this.marginLeft !== "") {
      style.paddingLeft = measureToString(this.marginLeft);
    }
    if (this.marginRight !== "") {
      style.paddingight = measureToString(this.marginRight);
    }
    if (this.spaceAbove !== "") {
      style.paddingTop = measureToString(this.spaceAbove);
    }
    if (this.spaceBelow !== "") {
      style.paddingBottom = measureToString(this.spaceBelow);
    }
    if (this.textIndent !== "") {
      style.textIndent = measureToString(this.textIndent);
      fixTextIndent(style);
    }
    if (this.lineHeight > 0) {
      style.lineHeight = measureToString(this.lineHeight);
    }