Error: Uncaught Error: Class 'Drupal\address\Event\AddressEvents' not found

8.x-1.10

I got errors if address module is not installed and activated.

under drush:

web26@vmdev05:/var/www/clients/client1/web26/web$ drush cr
<em class="placeholder">Notice</em>: Undefined variable: events in <em class="placeholder">Drupal\quick_node_clone\EventSubscriber\AddressEventSubscriber::getSubscribedEvents()</em> (line <em class="placeholder">20</em> of <em class="placeholder">/var/www/clients/client1/web26/web/modules/contrib/quick_node_clone/src/EventSubscriber/AddressEventSubscriber.php</em>). <pre class="backtrace">Drupal\quick_node_clone\EventSubscriber\AddressEventSubscriber::getSubscribedEvents() (Line: 37)
Drupal\Core\DependencyInjection\Compiler\RegisterEventSubscribersPass-&gt;process(Object) (Line: 141)
Symfony\Component\DependencyInjection\Compiler\Compiler-&gt;compile(Object) (Line: 759)

or if i visit the admin/flash page:

Warning: Invalid argument supplied for foreach() in Drupal\Core\DependencyInjection\Compiler\RegisterEventSubscribersPass->process() (line 37 of /var/www/clients/client1/web26/web/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterEventSubscribersPass.php) #0 /var/www/clients/client1/web26/web/core/includes/bootstrap.inc(582): _drupal_error_handler_real(2, 'Invalid argumen...', '/var/www/client...', 37, Array) #1 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterEventSubscribersPass.php(37): _drupal_error_handler(2, 'Invalid argumen...', '/var/www/client...', 37, Array) #2 /var/www/clients/client1/web26/vendor/symfony/dependency-injection/Compiler/Compiler.php(141): Drupal\Core\DependencyInjection\Compiler\RegisterEventSubscribersPass->process(Object(Drupal\Core\DependencyInjection\ContainerBuilder)) #3 /var/www/clients/client1/web26/vendor/symfony/dependency-injection/ContainerBuilder.php(759): Symfony\Component\DependencyInjection\Compiler\Compiler->compile(Object(Drupal\Core\DependencyInjection\ContainerBuilder)) #4 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/DrupalKernel.php(1314): Symfony\Component\DependencyInjection\ContainerBuilder->compile() #5 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/DrupalKernel.php(891): Drupal\Core\DrupalKernel->compileContainer() #6 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/DrupalKernel.php(805): Drupal\Core\DrupalKernel->initializeContainer() #7 /var/www/clients/client1/web26/web/core/includes/common.inc(1140): Drupal\Core\DrupalKernel->updateModules(Array, Array) #8 /var/www/clients/client1/web26/web/modules/contrib/admin_toolbar/admin_toolbar_tools/src/Controller/ToolbarController.php(145): drupal_flush_all_caches() #9 [internal function]: Drupal\admin_toolbar_tools\Controller\ToolbarController->flushAll() #10 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array) #11 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/Render/Renderer.php(582): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #12 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #13 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) #14 /var/www/clients/client1/web26/vendor/symfony/http-kernel/HttpKernel.php(151): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #15 /var/www/clients/client1/web26/vendor/symfony/http-kernel/HttpKernel.php(68): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #16 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #17 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #18 /var/www/clients/client1/web26/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #19 /var/www/clients/client1/web26/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #20 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #21 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(50): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #22 /var/www/clients/client1/web26/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #23 /var/www/clients/client1/web26/web/core/lib/Drupal/Core/DrupalKernel.php(664): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #24 /var/www/clients/client1/web26/web/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #25 {main}.

For now i installed and activated address module to fix this temporary.

I just upgraded from 8.x-1.9 to 8.x-1.10 and am also getting the warning and notices mentioned in comment #4. My site does not have the address module installed.

I think the issue now is just returning an uninitialized variable. Attached is a patch that initializes the events array before returning it. I am not seeing those warnings anymore.

#5 works for me. Thanks @floydm

EDIT: Oops! I see in the release notes that it is. Thanks y'all!

Is this fixed in version 8.x-1.11?