[Bug] String injection with instantiate: false no longer works on ember 3.27.0

[romgere]

🐞 Describe the Bug

Injecting a string via dependency injection raise an error.

🔬 Minimal Reproduction

Minimal reproduction on fresh app : https://github.com/romgere/test-ember-string-injection

• Currently on ember 3.26 : working
• Update to [email protected] : breaking

To sum-up
Try to inject a string into a service with an initializer :

// initializer.js
export function initialize(application) {
  application.register('config:a-string', 'My great injected string', {
    instantiate: false,
  });

  application.inject(
    'service:test-injection',
    'injectedString',
    'config:a-string'
  );
}

export default {
  initialize,
};

// service.js
import Service from '@ember/service';

export default class TestInjectionService extends Service {
  injectedString = null; // injected by initializer
}

😕 Actual Behavior

When trying to use the service property got the following error :

Uncaught TypeError: Cannot create property 'Symbol(INIT_FACTORY)' on string 'My great injected string'

🤔 Expected Behavior

The property is setted with injected string.

🌍 Environment

• Ember: 3.27.0
• Node.js/npm: v12.20.2 (npm v6.14.11)
• OS: ubuntu
• Browser: chrome

➕ Additional Context

Related to what is done in https://github.com/yapplabs/ember-modal-dialog, see yapplabs/ember-modal-dialog#320.

[lifeart]

as workaround,

 application.register('config:a-string', { toString() => 'My great injected string' }, {
    instantiate: false,
  });

may work

[makepanic]

The mentioned workaround fixes the issue in modal-dialog for me

[CvX]

The same issue affects ember-model-validator.

[andsmedeiros]

I have the same issue with 3.28.0, but while trying to inject some numeric constants in components.
Cannot create property 'Symbol(INIT_FACTORY)' on number '6.375'

[lifeart]

@andsmedeiros your case will be:

 application.register('config:a-number', { [Symbol.toPrimitive]() { return 42 } }, {
    instantiate: false,
  });

[andsmedeiros]

Thanks @lifeart, this does the trick.