Hotfix for #3215043 by mondrake, Spokje, larowlan, xjm: Fix PHP 7.3 compatibility.

core/modules/system/src/Form/ModulesListNonStableConfirmForm.php

@@ -24,28 +24,28 @@ class ModulesListNonStableConfirmForm extends ModulesListConfirmForm {
    *
    * @var \Drupal\Core\Extension\ModuleExtensionList
    */
-  protected ModuleExtensionList $moduleExtensionList;
+  protected $moduleExtensionList;
 
   /**
    * An array of module names to be enabled, keyed by lifecycle.
    *
    * @var array
    */
-  protected array $groupedModuleInfo;
+  protected $groupedModuleInfo;
 
   /**
    * Boolean indicating a core deprecated module is being enabled.
    *
    * @var bool
    */
-  protected bool $coreDeprecatedModules;
+  protected $coreDeprecatedModules;
 
   /**
    * Boolean indicating a contrib deprecated module is being enabled.
    *
    * @var bool
    */
-  protected bool $contribDeprecatedModules;
+  protected $contribDeprecatedModules;
 
   /**
    * Constructs a new ModulesListNonStableConfirmForm.

core/modules/system/tests/src/Functional/Module/NonStableModulesTest.php

@@ -3,7 +3,6 @@
 namespace Drupal\Tests\system\Functional\Module;
 
 use Drupal\Tests\BrowserTestBase;
-use Drupal\user\UserInterface;
 
 /**
  * Tests the installation of deprecated and experimental modules.
@@ -17,7 +16,7 @@ class NonStableModulesTest extends BrowserTestBase {
    *
    * @var \Drupal\user\UserInterface
    */
-  protected UserInterface $adminUser;
+  protected $adminUser;
 
   /**
    * {@inheritdoc}