diff --git a/src/Symfony/Bridge/Twig/Command/LintCommand.php b/src/Symfony/Bridge/Twig/Command/LintCommand.php
index c65d68cdefa46..9dcbf4964e228 100644
--- a/src/Symfony/Bridge/Twig/Command/LintCommand.php
+++ b/src/Symfony/Bridge/Twig/Command/LintCommand.php
@@ -226,7 +226,7 @@ private function displayJson(OutputInterface $output, array $filesInfo)
         return min($errors, 1);
     }
 
-    private function renderException(OutputInterface $output, string $template, Error $exception, string $file = null)
+    private function renderException(SymfonyStyle $output, string $template, Error $exception, string $file = null)
     {
         $line = $exception->getTemplateLine();
 
diff --git a/src/Symfony/Bridge/Twig/Mime/WrappedTemplatedEmail.php b/src/Symfony/Bridge/Twig/Mime/WrappedTemplatedEmail.php
index 7b299e6347d64..f1726914b490b 100644
--- a/src/Symfony/Bridge/Twig/Mime/WrappedTemplatedEmail.php
+++ b/src/Symfony/Bridge/Twig/Mime/WrappedTemplatedEmail.php
@@ -182,7 +182,7 @@ public function getBcc(): array
      */
     public function setPriority(int $priority): self
     {
-        $this->message->setPriority($priority);
+        $this->message->priority($priority);
 
         return $this;
     }
diff --git a/src/Symfony/Component/DependencyInjection/Definition.php b/src/Symfony/Component/DependencyInjection/Definition.php
index f07c0c5bcf885..9ce01cea473fe 100644
--- a/src/Symfony/Component/DependencyInjection/Definition.php
+++ b/src/Symfony/Component/DependencyInjection/Definition.php
@@ -102,7 +102,7 @@ public function setChanges(array $changes)
     /**
      * Sets a factory.
      *
-     * @param string|array|Reference $factory A PHP function, reference or an array containing a class/Reference and a method to call
+     * @param string|array|Reference|null $factory A PHP function, reference or an array containing a class/Reference and a method to call
      *
      * @return $this
      */
diff --git a/src/Symfony/Component/Filesystem/Filesystem.php b/src/Symfony/Component/Filesystem/Filesystem.php
index b5eb6b5c3bee3..483c0b4261bfa 100644
--- a/src/Symfony/Component/Filesystem/Filesystem.php
+++ b/src/Symfony/Component/Filesystem/Filesystem.php
@@ -59,7 +59,7 @@ public function copy($originFile, $targetFile, $overwriteNewerFiles = false)
             }
 
             // Stream context created to allow files overwrite when using FTP stream wrapper - disabled by default
-            if (false === $target = @fopen($targetFile, 'w', null, stream_context_create(['ftp' => ['overwrite' => true]]))) {
+            if (false === $target = @fopen($targetFile, 'w', false, stream_context_create(['ftp' => ['overwrite' => true]]))) {
                 throw new IOException(sprintf('Failed to copy "%s" to "%s" because target file could not be opened for writing.', $originFile, $targetFile), 0, null, $originFile);
             }
 
diff --git a/src/Symfony/Component/HttpFoundation/Request.php b/src/Symfony/Component/HttpFoundation/Request.php
index aec9177e7ee05..af00561a0110b 100644
--- a/src/Symfony/Component/HttpFoundation/Request.php
+++ b/src/Symfony/Component/HttpFoundation/Request.php
@@ -1564,7 +1564,7 @@ public function getContent($asResource = false)
      */
     public function getETags()
     {
-        return preg_split('/\s*,\s*/', $this->headers->get('if_none_match'), null, \PREG_SPLIT_NO_EMPTY);
+        return preg_split('/\s*,\s*/', $this->headers->get('if_none_match'), -1, \PREG_SPLIT_NO_EMPTY);
     }
 
     /**
diff --git a/src/Symfony/Component/VarDumper/Command/ServerDumpCommand.php b/src/Symfony/Component/VarDumper/Command/ServerDumpCommand.php
index 3ec8353aff6fa..b66301b52d21e 100644
--- a/src/Symfony/Component/VarDumper/Command/ServerDumpCommand.php
+++ b/src/Symfony/Component/VarDumper/Command/ServerDumpCommand.php
@@ -95,5 +95,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         $this->server->listen(function (Data $data, array $context, int $clientId) use ($descriptor, $io) {
             $descriptor->describe($io, $data, $context, $clientId);
         });
+
+        return 0;
     }
 }
diff --git a/src/Symfony/Component/VarExporter/Internal/Exporter.php b/src/Symfony/Component/VarExporter/Internal/Exporter.php
index 0c6d8dd7467f3..74b81d5cf6948 100644
--- a/src/Symfony/Component/VarExporter/Internal/Exporter.php
+++ b/src/Symfony/Component/VarExporter/Internal/Exporter.php
@@ -82,7 +82,7 @@ public static function prepare($values, $objectsPool, &$refsPool, &$objectsCount
                 }
 
                 if (!\is_array($properties = $value->__serialize())) {
-                    throw new \Typerror($class.'::__serialize() must return an array');
+                    throw new \TypeError($class.'::__serialize() must return an array');
                 }
 
                 goto prepare_value;
diff --git a/src/Symfony/Contracts/Service/ServiceSubscriberTrait.php b/src/Symfony/Contracts/Service/ServiceSubscriberTrait.php
index 81b2bae8a4499..243e10328f1bf 100644
--- a/src/Symfony/Contracts/Service/ServiceSubscriberTrait.php
+++ b/src/Symfony/Contracts/Service/ServiceSubscriberTrait.php
@@ -43,7 +43,7 @@ public static function getSubscribedServices(): array
             }
 
             if (self::class === $method->getDeclaringClass()->name && ($returnType = $method->getReturnType()) && !$returnType->isBuiltin()) {
-                $services[self::class.'::'.$method->name] = '?'.($returnType instanceof \ReflectionNamedType ? $returnType->getName() : $type);
+                $services[self::class.'::'.$method->name] = '?'.($returnType instanceof \ReflectionNamedType ? $returnType->getName() : $returnType);
             }
         }