Merge branch '6.4' into 7.0

* 6.4:
  Fix implicitly-required parameters
  minor #53524 [Messenger] [AmazonSqs] Allow `async-aws/sqs` version 2 (smoench)
  Fix bad merge
  List CS fix in .git-blame-ignore-revs
  Fix implicitly-required parameters
  List CS fix in .git-blame-ignore-revs
  Apply php-cs-fixer fix --rules nullable_type_declaration_for_default_null_value
  [Messenger][AmazonSqs] Allow async-aws/sqs version 2

Author: nicolas-grekas

Exception/ClassNotFoundException.php

@@ -13,7 +13,7 @@
 
 class ClassNotFoundException extends \Exception implements ExceptionInterface
 {
-    public function __construct(string $class, \Throwable $previous = null)
+    public function __construct(string $class, ?\Throwable $previous = null)
     {
         parent::__construct(sprintf('Class "%s" not found.', $class), 0, $previous);
     }

Exception/NotInstantiableTypeException.php

@@ -13,7 +13,7 @@
 
 class NotInstantiableTypeException extends \Exception implements ExceptionInterface
 {
-    public function __construct(string $type, \Throwable $previous = null)
+    public function __construct(string $type, ?\Throwable $previous = null)
     {
         parent::__construct(sprintf('Type "%s" is not instantiable.', $type), 0, $previous);
     }

LazyGhostTrait.php

@@ -31,7 +31,7 @@ trait LazyGhostTrait
      *                                                    that the initializer doesn't initialize, if any
      * @param static|null              $instance
      */
-    public static function createLazyGhost(\Closure $initializer, array $skippedProperties = null, object $instance = null): static
+    public static function createLazyGhost(\Closure $initializer, ?array $skippedProperties = null, ?object $instance = null): static
     {
         if (self::class !== $class = $instance ? $instance::class : static::class) {
             $skippedProperties["\0".self::class."\0lazyObjectState"] = true;

LazyProxyTrait.php

@@ -27,7 +27,7 @@ trait LazyProxyTrait
      * @param \Closure():object $initializer Returns the proxied object
      * @param static|null       $instance
      */
-    public static function createLazyProxy(\Closure $initializer, object $instance = null): static
+    public static function createLazyProxy(\Closure $initializer, ?object $instance = null): static
     {
         if (self::class !== $class = $instance ? $instance::class : static::class) {
             $skippedProperties = ["\0".self::class."\0lazyObjectState" => true];

ProxyHelper.php

@@ -213,7 +213,7 @@ class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
             EOPHP;
     }
 
-    public static function exportSignature(\ReflectionFunctionAbstract $function, bool $withParameterTypes = true, string &$args = null): string
+    public static function exportSignature(\ReflectionFunctionAbstract $function, bool $withParameterTypes = true, ?string &$args = null): string
     {
         $byRefIndex = 0;
         $args = '';
@@ -270,7 +270,7 @@ public static function exportSignature(\ReflectionFunctionAbstract $function, bo
         return $signature;
     }
 
-    public static function exportType(\ReflectionFunctionAbstract|\ReflectionProperty|\ReflectionParameter $owner, bool $noBuiltin = false, \ReflectionType $type = null): ?string
+    public static function exportType(\ReflectionFunctionAbstract|\ReflectionProperty|\ReflectionParameter $owner, bool $noBuiltin = false, ?\ReflectionType $type = null): ?string
     {
         if (!$type ??= $owner instanceof \ReflectionFunctionAbstract ? $owner->getReturnType() : $owner->getType()) {
             return null;

Tests/LazyGhostTraitTest.php

@@ -247,7 +247,7 @@ public function testReadOnlyClass()
      *
      * @return T
      */
-    private function createLazyGhost(string $class, \Closure $initializer, array $skippedProperties = null): object
+    private function createLazyGhost(string $class, \Closure $initializer, ?array $skippedProperties = null): object
     {
         $r = new \ReflectionClass($class);
 

VarExporter.php

@@ -37,7 +37,7 @@ final class VarExporter
      *
      * @throws ExceptionInterface When the provided value cannot be serialized
      */
-    public static function export(mixed $value, bool &$isStaticValue = null, array &$foundClasses = []): string
+    public static function export(mixed $value, ?bool &$isStaticValue = null, array &$foundClasses = []): string
     {
         $isStaticValue = true;