bug #30026 [VarDumper] dont implement Serializable in Stub (nicolas-g…

…rekas)

This PR was merged into the 3.4 branch.

Discussion
----------

[VarDumper] dont implement Serializable in Stub

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #30014
| License       | MIT
| Doc PR        | -

`Serializable` is really really broken...

Commits
-------

73070d7 [VarDumper] dont implement Serializable in Stub

src/Symfony/Component/VarDumper/Cloner/Stub.php

@@ -16,7 +16,7 @@
  *
  * @author Nicolas Grekas <p@tchwork.com>
  */
-class Stub implements \Serializable
+class Stub
 {
     const TYPE_REF = 1;
     const TYPE_STRING = 2;
@@ -42,16 +42,19 @@ class Stub implements \Serializable
     /**
      * @internal
      */
-    public function serialize()
+    public function __sleep()
     {
-        return \serialize([$this->class, $this->position, $this->cut, $this->type, $this->value, $this->handle, $this->refCount, $this->attr]);
+        $this->serialized = [$this->class, $this->position, $this->cut, $this->type, $this->value, $this->handle, $this->refCount, $this->attr];
+
+        return ['serialized'];
     }
 
     /**
      * @internal
      */
-    public function unserialize($serialized)
+    public function __wakeup()
     {
-        list($this->class, $this->position, $this->cut, $this->type, $this->value, $this->handle, $this->refCount, $this->attr) = \unserialize($serialized);
+        list($this->class, $this->position, $this->cut, $this->type, $this->value, $this->handle, $this->refCount, $this->attr) = $this->serialized;
+        unset($this->serialized);
     }
 }