Merge branch '3.4' into 4.4

* 3.4:
  [MimeType] Duplicated MimeType due to PHP Bug
  fix guessing form types for DateTime types
  fix handling typed properties as constraint options

Constraint.php

@@ -108,7 +108,7 @@ public function __construct($options = null)
         $defaultOption = $this->getDefaultOption();
         $invalidOptions = [];
         $missingOptions = array_flip((array) $this->getRequiredOptions());
-        $knownOptions = get_object_vars($this);
+        $knownOptions = get_class_vars(static::class);
 
         // The "groups" option is added to the object lazily
         $knownOptions['groups'] = true;

Tests/ConstraintTest.php

@@ -13,10 +13,13 @@
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Exception\InvalidOptionsException;
 use Symfony\Component\Validator\Tests\Fixtures\ClassConstraint;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintA;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintB;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintC;
+use Symfony\Component\Validator\Tests\Fixtures\ConstraintWithStaticProperty;
+use Symfony\Component\Validator\Tests\Fixtures\ConstraintWithTypedProperty;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintWithValue;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintWithValueAsDefault;
 
@@ -245,4 +248,25 @@ public function testAnnotationSetUndefinedDefaultOption()
         $this->expectExceptionMessage('No default option is configured for constraint "Symfony\Component\Validator\Tests\Fixtures\ConstraintB".');
         new ConstraintB(['value' => 1]);
     }
+
+    public function testStaticPropertiesAreNoOptions()
+    {
+        $this->expectException(InvalidOptionsException::class);
+
+        new ConstraintWithStaticProperty([
+            'foo' => 'bar',
+        ]);
+    }
+
+    /**
+     * @requires PHP 7.4
+     */
+    public function testSetTypedProperty()
+    {
+        $constraint = new ConstraintWithTypedProperty([
+            'foo' => 'bar',
+        ]);
+
+        $this->assertSame('bar', $constraint->foo);
+    }
 }

Tests/Fixtures/ConstraintWithStaticProperty.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace Symfony\Component\Validator\Tests\Fixtures;
+
+use Symfony\Component\Validator\Constraint;
+
+class ConstraintWithStaticProperty extends Constraint
+{
+    public static $foo;
+}

Tests/Fixtures/ConstraintWithTypedProperty.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace Symfony\Component\Validator\Tests\Fixtures;
+
+use Symfony\Component\Validator\Constraint;
+
+class ConstraintWithTypedProperty extends Constraint
+{
+    public string $foo;
+}