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, "barcode",  true);
    this.charEncoding = getKeyword({
      data: attributes.charEncoding
        ? attributes.charEncoding.toLowerCase()
        : "",
      defaultValue: "",
      validate: k =>
        [
          "utf-8",
          "big-five",
          "fontspecific",
          "gbk",
          "gb-18030",
          "gb-2312",
          "ksc-5601",
          "none",
          "shift-jis",
          "ucs-2",
          "utf-16",
        ].includes(k) || k.match(/iso-8859-\d{2}/),
    });
    this.checksum = getStringOption(attributes.checksum, [
      "none",
      "1mod10",
      "1mod10_1mod11",
      "2mod10",
      "auto",
    ]);