Error: "EmberObject.create no longer supports.." - only during embroider-safe scenario on Ember 4.12 addon (v1)

[Pixelik]

I updated my Ember Addon (v1) to Ember 4.12.

The addon is using ember-cp-validations v5.

This is what my package.json looks like:

  "dependencies": {
    ...,
    "ember-cp-validations": "^5.0.0",
    ...
  },
  "devDependencies": {
    ...,
    "@babel/core": "^7.22.1",
    "@babel/eslint-parser": "^7.21.8",
    "@babel/plugin-proposal-decorators": "^7.21.0",
    ...,
    "@ember-intl/cp-validations": "^5.0.0",
    ...,
    "@embroider/test-setup": "^3.0.0",
    ...,
    "ember-auto-import": "^2.6.3",
    ...,
    "ember-qunit": "^6.2.0",
    "ember-resolver": "^10.0.0",
    "ember-source": "~4.12.0",
    ...,
    "qunit": "^2.19.4",
    ...,
    "webpack": "^5.0.0
  },
  "peerDependencies": {
    "ember-source": "^4.8.0"
  },
  "resolutions": {
    "@embroider/macros": "^1.12.2"
  }

Everything works and all tests are passing, except when running the embroider-safe scenario where this error is thrown:

Error: Assertion Failed: EmberObject.create no longer supports defining computed properties. Define computed properties using extend() or reopen() before calling create().
    at assert (http://localhost:4200/assets/test-support.js:233:15)
    at initialize (http://localhost:4200/assets/vendor.js:30952:81)
    at Class.create (http://localhost:4200/assets/vendor.js:31314:9)
    at new Options (webpack://dummy/../rewritten-packages/ember-cp-validations.126a452a/-private/options.js?:39:26)
    at Class.buildOptions (webpack://dummy/../rewritten-packages/ember-cp-validations.126a452a/validators/base.js?:130:12)
    at Class.init (webpack://dummy/../rewritten-packages/ember-cp-validations.126a452a/validators/base.js?:110:78)
    at Class.superWrapper [as init] (http://localhost:4200/assets/vendor.js:23897:22)
    at initialize (http://localhost:4200/assets/vendor.js:30988:9)
    at Class.create (http://localhost:4200/assets/vendor.js:31312:9)
    at InternalFactoryManager.create (http://localhost:4200/assets/vendor.js:13726:25)

I understand that the Error itself EmberObject.create no longer supports defining computed properties. is a known issue, but why am I getting it only during the embroider-safe test scenario?

Do you think I should open this issue on the ember-cp-validations repo instead ? But there really isn't anything wrong with ember-cp-validations v5 on Ember 4.12 with the default test scenario so..?

Any help would be much appreciated 🙏

[Pixelik]

I'm closing this issue as the problem is coming from ember-cp-validations and I have opened a relevant issue & PR on that repo instead