diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
index c6675c3b1a..94b9bfa012 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
@@ -87,6 +87,12 @@ class AppKernel extends Kernel
 
     public function __wakeup()
     {
+        foreach ($this as $k => $v) {
+            if (\is_object($v)) {
+                throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+            }
+        }
+
         $this->__construct($this->varDir, $this->testCase, $this->rootConfig, $this->environment, $this->debug);
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Loader/Configurator/AbstractConfigurator.php b/src/Symfony/Component/DependencyInjection/Loader/Configurator/AbstractConfigurator.php
index 2b7aa3fc81..b3020fb93f 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/Configurator/AbstractConfigurator.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/Configurator/AbstractConfigurator.php
@@ -34,6 +34,16 @@ abstract class AbstractConfigurator
         throw new \BadMethodCallException(sprintf('Call to undefined method "%s::%s()".', static::class, $method));
     }
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     /**
      * Checks that a value is valid, optionally replacing Definition and Reference configurators by their configure value.
      *
diff --git a/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php b/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php
index 323fdd2329..d1e03e8292 100644
--- a/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php
+++ b/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php
@@ -76,6 +76,16 @@ class OrderedHashMapIterator implements \Iterator
         $this->managedCursors[$this->cursorId] = &$this->cursor;
     }
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     /**
      * Removes the iterator's cursors from the managed cursors of the
      * corresponding {@link OrderedHashMap} instance.
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php
index 832a5d9ebf..3938dab6a1 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php
@@ -123,6 +123,10 @@ abstract class DataCollector implements DataCollectorInterface
     public function __wakeup()
     {
         if (__CLASS__ !== $c = (new \ReflectionMethod($this, 'unserialize'))->getDeclaringClass()->name) {
+            if (\is_object($this->data)) {
+                throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+            }
+
             @trigger_error(sprintf('Implementing the "%s::unserialize()" method is deprecated since Symfony 4.3, store all the serialized state in the "data" property instead.', $c), \E_USER_DEPRECATED);
             $this->unserialize($this->data);
         }
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
index df4ec5f670..af8b3a9458 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
@@ -184,7 +184,7 @@ class DumpDataCollector extends DataCollector implements DataDumperInterface
         $fileLinkFormat = array_pop($this->data);
         $this->dataCount = \count($this->data);
 
-        self::__construct($this->stopwatch, $fileLinkFormat, $charset);
+        self::__construct($this->stopwatch, \is_string($fileLinkFormat) || $fileLinkFormat instanceof FileLinkFormatter ? $fileLinkFormat : null, \is_string($charset) ? $charset : null);
     }
 
     public function getDumpsCount()
diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index b91fc66a9f..c9317c81ca 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -920,6 +920,10 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
 
     public function __wakeup()
     {
+        if (\is_object($this->environment) || \is_object($this->debug)) {
+            throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+        }
+
         if (__CLASS__ !== $c = (new \ReflectionMethod($this, 'serialize'))->getDeclaringClass()->name) {
             @trigger_error(sprintf('Implementing the "%s::serialize()" method is deprecated since Symfony 4.3.', $c), \E_USER_DEPRECATED);
             $this->unserialize($this->serialized);
diff --git a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php
index 2b224fe72b..69ad4dd9b6 100644
--- a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php
+++ b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php
@@ -35,6 +35,16 @@ class Connection extends AbstractConnection
     /** @var resource */
     private $connection;
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     public function __destruct()
     {
         $this->disconnect();
diff --git a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Query.php b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Query.php
index e3a6fc8d65..91b758e9ac 100644
--- a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Query.php
+++ b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Query.php
@@ -38,6 +38,16 @@ class Query extends AbstractQuery
         parent::__construct($connection, $dn, $query, $options);
     }
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     public function __destruct()
     {
         $con = $this->connection->getResource();
diff --git a/src/Symfony/Component/Lock/Lock.php b/src/Symfony/Component/Lock/Lock.php
index 1271100550..c9c12b65d8 100644
--- a/src/Symfony/Component/Lock/Lock.php
+++ b/src/Symfony/Component/Lock/Lock.php
@@ -50,6 +50,16 @@ final class Lock implements LockInterface, LoggerAwareInterface
         $this->logger = new NullLogger();
     }
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     /**
      * Automatically releases the underlying lock when the object is destructed.
      */
diff --git a/src/Symfony/Component/Process/Pipes/UnixPipes.php b/src/Symfony/Component/Process/Pipes/UnixPipes.php
index 70fdd29574..7cb5bab76e 100644
--- a/src/Symfony/Component/Process/Pipes/UnixPipes.php
+++ b/src/Symfony/Component/Process/Pipes/UnixPipes.php
@@ -35,6 +35,16 @@ class UnixPipes extends AbstractPipes
         parent::__construct($input);
     }
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     public function __destruct()
     {
         $this->close();
diff --git a/src/Symfony/Component/Process/Pipes/WindowsPipes.php b/src/Symfony/Component/Process/Pipes/WindowsPipes.php
index b22171dd4a..b2c3f4f4f3 100644
--- a/src/Symfony/Component/Process/Pipes/WindowsPipes.php
+++ b/src/Symfony/Component/Process/Pipes/WindowsPipes.php
@@ -88,6 +88,16 @@ class WindowsPipes extends AbstractPipes
         parent::__construct($input);
     }
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     public function __destruct()
     {
         $this->close();
diff --git a/src/Symfony/Component/Process/Process.php b/src/Symfony/Component/Process/Process.php
index e38e144d44..244d0c0457 100644
--- a/src/Symfony/Component/Process/Process.php
+++ b/src/Symfony/Component/Process/Process.php
@@ -198,6 +198,16 @@ class Process implements \IteratorAggregate
         return $process;
     }
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     public function __destruct()
     {
         $this->stop(0);
diff --git a/src/Symfony/Component/Routing/Loader/Configurator/CollectionConfigurator.php b/src/Symfony/Component/Routing/Loader/Configurator/CollectionConfigurator.php
index 79c1100a82..c0a074c0b7 100644
--- a/src/Symfony/Component/Routing/Loader/Configurator/CollectionConfigurator.php
+++ b/src/Symfony/Component/Routing/Loader/Configurator/CollectionConfigurator.php
@@ -36,6 +36,16 @@ class CollectionConfigurator
         $this->parentPrefixes = $parentPrefixes;
     }
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     public function __destruct()
     {
         if (null === $this->prefixes) {
diff --git a/src/Symfony/Component/Routing/Loader/Configurator/ImportConfigurator.php b/src/Symfony/Component/Routing/Loader/Configurator/ImportConfigurator.php
index 0059a632a1..b950d4f47a 100644
--- a/src/Symfony/Component/Routing/Loader/Configurator/ImportConfigurator.php
+++ b/src/Symfony/Component/Routing/Loader/Configurator/ImportConfigurator.php
@@ -30,6 +30,16 @@ class ImportConfigurator
         $this->route = $route;
     }
 
+    public function __sleep()
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
     public function __destruct()
     {
         $this->parent->addCollection($this->route);