Attach (recommended) or Link to PDF file here:
https://www.canada.ca/content/dam/ircc/migration/ircc/english/pdf/kits/forms/eimm5669e.pdf
[eimm5669e.pdf](https://github.com/mozilla/pdf.js/files/7225677/eimm5669e.2.pdf)

Configuration:
- Web browser and its version: Firefox nightly
- Operating system and its version: Linux Debian

Steps to reproduce the problem:
1. Look at the bottom of page 2

constructor(attributes) {
    super(TEMPLATE_NS_ID, "line",  true);
    this.hand = getStringOption(attributes.hand, ["even", "left", "right"]);
    this.id = attributes.id || "";
    this.slope = getStringOption(attributes.slope, ["\\", "/"]);
    this.use = attributes.use || "";
    this.usehref = attributes.usehref || "";
    this.edge = null;
  }
  [$toHTML]() {
    const parent = this[$getParent]()[$getParent]();
    const edge = this.edge ? this.edge : new Edge({});
    const edgeStyle = edge[$toStyle]();
    const style = Object.create(null);