id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
21831	If contrib.auth is not in INSTALLED_APPS, any import (even indirectly) of anything within contrib.auth causes Django to fail to startup	Carl Meyer	nobody	"This is due to d818e0c9b2b88276cc499974f9eee893170bf0a8 (the new checks framework) and the new stricter app-loading stuff. It also relates to #20915 (the dependency that `django.test` has on `django.contrib.auth`) and #19774 (the dependency that `django.contrib.contenttypes` has on `django.contrib.admin` and thus indirectly on `django.contrib.auth`).

The `check_user_model` check for contrib.auth is registered in `django/contrib/auth/__init__.py` as a side effect of importing anything from within `django.contrib.auth`.

Actually executing the `check_user_model` check when contrib.auth is not installed results in ""LookupError: No installed app with label 'auth'."" on the `cls = apps.get_model(app_name, model_name)` line."	Bug	new	Core (Other)	dev	Release blocker				Accepted	0	0	0	0	0	0