Cannot read properties of undefined (reading byteLength)

[NullVoxPopuli]

[!] (plugin babel) TypeError: <repo>/src/index.ts: Cannot read properties of undefined (reading 'byteLength')
src/index.ts
    at canSimplify (<.pnpm>/super-fast-md5@1.0.3/node_modules/super-fast-md5/dist/md5.cjs.js:97:12)
    at calculate (<.pnpm>/super-fast-md5@1.0.3/node_modules/super-fast-md5/dist/md5.cjs.js:119:8)
    at Object.md5 (<.pnpm>/super-fast-md5@1.0.3/node_modules/super-fast-md5/dist/md5.cjs.js:134:10)
    at uniqueIdentifier (<.pnpm>/glimmer-scoped-css@0.8.1/node_modules/glimmer-scoped-css/src/ast-transform.ts:22:10)
    at <.pnpm>/glimmer-scoped-css@0.8.1/node_modules/glimmer-scoped-css/src/ast-transform.ts:29:49
    at <.pnpm>/babel-plugin-ember-template-compilation@2.4.1/node_modules/babel-plugin-ember-template-compilation/src/node-main.ts:60:51

I suspect this can happen when there is no filename: https://github.com/cardstack/glimmer-scoped-css/blob/main/glimmer-scoped-css/src/ast-transform.ts#L22

[NullVoxPopuli]

It turns out this is possible if you use the "don't pass any options, but still specify them" sort of plugin declaration:

    [
      "babel-plugin-ember-template-compilation",
      {
        "targetFormat": "hbs",
        "transforms": [
          ["glimmer-scoped-css/ast-transform", {}]
        ]
      }
    ],

instead of

    [
      "babel-plugin-ember-template-compilation",
      {
        "targetFormat": "hbs",
        "transforms": [
          "glimmer-scoped-css/ast-transform"
        ]
      }
    ],