Cache rebuild can trigger an infinite loop

The original Drupal\Core\Language\LanguageDefault has the following class comment:

Provides a simple get and set wrapper to the default language object.
The default language must be provided without dependencies since it is both
configured and a dependency of the configuration system. The LanguageDefault
object is a container service. The default values are stored on the container
by \Drupal\Core\DrupalKernel::buildContainer(). This allows services to
override this parameter in a ServiceProvider, for example,
\Drupal\language\LanguageServiceProvider::alter().

I think this means that we can't read config in Drupal\domain_language\LanguageDefault.

I do get that we can't store the default language in the container as that class suggests, since it can vary per request. At the very least we should make sure to not read system.site config in Drupal\domain_language\LanguageDefault.

I can confirm, this fix solved my problem on my site.

Merged to 8.x-1.x. Thanks!

Automatically closed - issue fixed for 2 weeks with no activity.