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
31870	App with default_app_config and without apps.py or with an empty apps.py crashes.	Iuri de Silvio	Iuri de Silvio	"If I don't have an `apps.py` and the `default_app_config` is in `__init__.py`, it fails.

{{{
Traceback (most recent call last):
  File ""./manage.py"", line 22, in <module>
    main()
  File ""./manage.py"", line 18, in main
    execute_from_command_line(sys.argv)
  File ""django/core/management/__init__.py"", line 401, in execute_from_command_line
    utility.execute()
  File ""django/core/management/__init__.py"", line 377, in execute
    django.setup()
  File ""django/__init__.py"", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File ""django/apps/registry.py"", line 91, in populate
    app_config = AppConfig.create(entry)
  File ""django/apps/config.py"", line 157, in create
    if new_entry == app_config_name:
UnboundLocalError: local variable 'app_config_name' referenced before assignment
}}}

If the `apps.py` is there, but the `default_app_config` is in `__init__.py`, it fails too.

{{{
Traceback (most recent call last):
  File ""django/django/test/utils.py"", line 381, in inner
    return func(*args, **kwargs)
  File ""django/tests/apps/tests.py"", line 541, in test_explicit_default_app_config_with_empty_apps
    with self.settings(INSTALLED_APPS=['apps.explicit_default_config_with_empty_apps']):
  File ""django/django/test/utils.py"", line 336, in __enter__
    return self.enable()
  File ""django/django/test/utils.py"", line 410, in enable
    apps.set_installed_apps(self.options['INSTALLED_APPS'])
  File ""django/django/apps/registry.py"", line 355, in set_installed_apps
    self.populate(installed)
  File ""django/django/apps/registry.py"", line 91, in populate
    app_config = AppConfig.create(entry)
  File ""django/django/apps/config.py"", line 160, in create
    if new_entry == app_config_name:
UnboundLocalError: local variable 'app_config_name' referenced before assignment
}}}

Looks like a regression added in https://code.djangoproject.com/ticket/31180."	Bug	closed	Core (Other)	dev	Release blocker	fixed		Aymeric Augustin	Ready for checkin	1	0	0	0	0	0