Merge branch '6.1' into 6.2

* 6.1:
  [Translation] Fix Crowdin documentation urls
  ignore missing keys when mapping DateTime objects to uninitialized arrays
  fix writes to static $kernel property
  [Notifier] Fix test logic
  [Validator] Hint that `egulias/email-validator` needs to be installed for strict mode as default config

Author: xabbuh

Tests/CompoundFormTest.php

@@ -15,6 +15,8 @@
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\Form\Exception\AlreadySubmittedException;
 use Symfony\Component\Form\Extension\Core\DataMapper\DataMapper;
+use Symfony\Component\Form\Extension\Core\DataMapper\PropertyPathMapper;
+use Symfony\Component\Form\Extension\Core\Type\DateType;
 use Symfony\Component\Form\Extension\Core\Type\SubmitType;
 use Symfony\Component\Form\Extension\Core\Type\TextType;
 use Symfony\Component\Form\Extension\HttpFoundation\HttpFoundationRequestHandler;
@@ -36,6 +38,7 @@
 use Symfony\Component\Form\Tests\Fixtures\Map;
 use Symfony\Component\HttpFoundation\File\UploadedFile;
 use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\PropertyAccess\PropertyAccess;
 
 class CompoundFormTest extends TestCase
 {
@@ -1086,6 +1089,30 @@ public function testFileUpload()
         $this->assertNull($this->form->get('bar')->getData());
     }
 
+    public function testMapDateTimeObjectsWithEmptyArrayData()
+    {
+        $propertyAccessor = PropertyAccess::createPropertyAccessorBuilder()
+            ->enableExceptionOnInvalidIndex()
+            ->getPropertyAccessor();
+        $form = $this->factory->createBuilder()
+            ->setDataMapper(new PropertyPathMapper($propertyAccessor))
+            ->add('date', DateType::class, [
+                'auto_initialize' => false,
+                'format' => 'dd/MM/yyyy',
+                'html5' => false,
+                'model_timezone' => 'UTC',
+                'view_timezone' => 'UTC',
+                'widget' => 'single_text',
+            ])
+            ->getForm();
+
+        $form->submit([
+            'date' => '04/08/2022',
+        ]);
+
+        $this->assertEquals(['date' => new \DateTime('2022-08-04', new \DateTimeZone('UTC'))], $form->getData());
+    }
+
     private function createForm(string $name = 'name', bool $compound = true): FormInterface
     {
         $builder = $this->getBuilder($name);