diff --git a/src/Symfony/Component/Console/Command/Command.php b/src/Symfony/Component/Console/Command/Command.php
index 7f600ec3af..6c557a777e 100644
--- a/src/Symfony/Component/Console/Command/Command.php
+++ b/src/Symfony/Component/Console/Command/Command.php
@@ -430,8 +430,6 @@ class Command
      * This feature should be used only when creating a long process command,
      * like a daemon.
      *
-     * PHP 5.5+ or the proctitle PECL library is required
-     *
      * @return $this
      */
     public function setProcessTitle(string $title)
diff --git a/src/Symfony/Component/ErrorHandler/ErrorHandler.php b/src/Symfony/Component/ErrorHandler/ErrorHandler.php
index 930470ecfd..55164d6509 100644
--- a/src/Symfony/Component/ErrorHandler/ErrorHandler.php
+++ b/src/Symfony/Component/ErrorHandler/ErrorHandler.php
@@ -429,18 +429,6 @@ class ErrorHandler
         }
         $scope = $this->scopedErrors & $type;
 
-        if (4 < $numArgs = \func_num_args()) {
-            $context = $scope ? (func_get_arg(4) ?: []) : [];
-        } else {
-            $context = [];
-        }
-
-        if (isset($context['GLOBALS']) && $scope) {
-            $e = $context;                  // Whatever the signature of the method,
-            unset($e['GLOBALS'], $context); // $context is always a reference in 5.3
-            $context = $e;
-        }
-
         if (false !== strpos($message, "@anonymous\0")) {
             $logMessage = $this->parseAnonymousClass($message);
         } else {
@@ -502,6 +490,8 @@ class ErrorHandler
                         // `return trigger_error($e, E_USER_ERROR);` allows this error handler
                         // to make $e get through the __toString() barrier.
 
+                        $context = 4 < \func_num_args() ? (func_get_arg(4) ?: []) : [];
+
                         foreach ($context as $e) {
                             if ($e instanceof \Throwable && $e->__toString() === $message) {
                                 self::$toStringException = $e;
diff --git a/src/Symfony/Component/Translation/Translator.php b/src/Symfony/Component/Translation/Translator.php
index 81a71d1e66..c92abf1383 100644
--- a/src/Symfony/Component/Translation/Translator.php
+++ b/src/Symfony/Component/Translation/Translator.php
@@ -397,7 +397,7 @@ EOF
     protected function computeFallbackLocales(string $locale)
     {
         if (null === $this->parentLocales) {
-            $parentLocales = json_decode(file_get_contents(__DIR__.'/Resources/data/parents.json'), true);
+            $this->parentLocales = json_decode(file_get_contents(__DIR__.'/Resources/data/parents.json'), true);
         }
 
         $locales = [];
@@ -410,7 +410,7 @@ EOF
         }
 
         while ($locale) {
-            $parent = $parentLocales[$locale] ?? null;
+            $parent = $this->parentLocales[$locale] ?? null;
 
             if ($parent) {
                 $locale = 'root' !== $parent ? $parent : null;
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/EntityParent.php b/src/Symfony/Component/Validator/Tests/Fixtures/EntityParent.php
index 4674f8b35a..eb09e5a4b2 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/EntityParent.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/EntityParent.php
@@ -18,6 +18,7 @@ class EntityParent implements EntityInterfaceA
     protected $firstName;
     private $internal;
     private $data = 'Data';
+    private $child;
 
     /**
      * @NotNull
@@ -28,4 +29,9 @@ class EntityParent implements EntityInterfaceA
     {
         return 'Data';
     }
+
+    public function getChild()
+    {
+        return $this->child;
+    }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Validator/RecursiveValidatorTest.php b/src/Symfony/Component/Validator/Tests/Validator/RecursiveValidatorTest.php
index ef69a5bc00..1ebe1534ab 100644
--- a/src/Symfony/Component/Validator/Tests/Validator/RecursiveValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Validator/RecursiveValidatorTest.php
@@ -21,6 +21,7 @@ use Symfony\Component\Validator\Constraints\NotBlank;
 use Symfony\Component\Validator\Constraints\NotNull;
 use Symfony\Component\Validator\Constraints\Optional;
 use Symfony\Component\Validator\Constraints\Required;
+use Symfony\Component\Validator\Constraints\Valid;
 use Symfony\Component\Validator\ConstraintValidatorFactory;
 use Symfony\Component\Validator\Context\ExecutionContextFactory;
 use Symfony\Component\Validator\Mapping\ClassMetadata;
@@ -28,6 +29,7 @@ use Symfony\Component\Validator\Mapping\Factory\MetadataFactoryInterface;
 use Symfony\Component\Validator\Tests\Constraints\Fixtures\ChildA;
 use Symfony\Component\Validator\Tests\Constraints\Fixtures\ChildB;
 use Symfony\Component\Validator\Tests\Fixtures\Entity;
+use Symfony\Component\Validator\Tests\Fixtures\EntityParent;
 use Symfony\Component\Validator\Tests\Fixtures\EntityWithGroupedConstraintOnMethods;
 use Symfony\Component\Validator\Validator\RecursiveValidator;
 use Symfony\Component\Validator\Validator\ValidatorInterface;
@@ -144,6 +146,31 @@ class RecursiveValidatorTest extends AbstractTest
         $this->assertInstanceOf(IsTrue::class, $violations->get(1)->getConstraint());
     }
 
+    public function testValidConstraintOnGetterReturningNull()
+    {
+        $metadata = new ClassMetadata(EntityParent::class);
+        $metadata->addGetterConstraint('child', new Valid());
+
+        $this->metadataFactory->addMetadata($metadata);
+
+        $violations = $this->validator->validate(new EntityParent());
+
+        $this->assertCount(0, $violations);
+    }
+
+    public function testNotNullConstraintOnGetterReturningNull()
+    {
+        $metadata = new ClassMetadata(EntityParent::class);
+        $metadata->addGetterConstraint('child', new NotNull());
+
+        $this->metadataFactory->addMetadata($metadata);
+
+        $violations = $this->validator->validate(new EntityParent());
+
+        $this->assertCount(1, $violations);
+        $this->assertInstanceOf(NotNull::class, $violations->get(0)->getConstraint());
+    }
+
     public function testAllConstraintValidateAllGroupsForNestedConstraints()
     {
         $this->metadata->addPropertyConstraint('data', new All(['constraints' => [
diff --git a/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php b/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php
index 75d8e50175..eaa1309fd0 100644
--- a/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php
+++ b/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php
@@ -630,6 +630,10 @@ class RecursiveContextualValidator implements ContextualValidatorInterface
 
         if ($value instanceof LazyProperty) {
             $value = $value->getPropertyValue();
+
+            if (null === $value) {
+                return;
+            }
         }
 
         if (\is_array($value)) {