Upgrade framework

vendor/symfony/var-dumper/Cloner/Stub.php

@@ -18,17 +18,17 @@ namespace Symfony\Component\VarDumper\Cloner;
  */
 class Stub
 {
-    const TYPE_REF = 'ref';
-    const TYPE_STRING = 'string';
-    const TYPE_ARRAY = 'array';
-    const TYPE_OBJECT = 'object';
-    const TYPE_RESOURCE = 'resource';
+    public const TYPE_REF = 1;
+    public const TYPE_STRING = 2;
+    public const TYPE_ARRAY = 3;
+    public const TYPE_OBJECT = 4;
+    public const TYPE_RESOURCE = 5;
 
-    const STRING_BINARY = 'bin';
-    const STRING_UTF8 = 'utf8';
+    public const STRING_BINARY = 1;
+    public const STRING_UTF8 = 2;
 
-    const ARRAY_ASSOC = 'assoc';
-    const ARRAY_INDEXED = 'indexed';
+    public const ARRAY_ASSOC = 1;
+    public const ARRAY_INDEXED = 2;
 
     public $type = self::TYPE_REF;
     public $class = '';
@@ -37,5 +37,31 @@ class Stub
     public $handle = 0;
     public $refCount = 0;
     public $position = 0;
-    public $attr = array();
+    public $attr = [];
+
+    private static array $defaultProperties = [];
+
+    /**
+     * @internal
+     */
+    public function __sleep(): array
+    {
+        $properties = [];
+
+        if (!isset(self::$defaultProperties[$c = static::class])) {
+            self::$defaultProperties[$c] = get_class_vars($c);
+
+            foreach ((new \ReflectionClass($c))->getStaticProperties() as $k => $v) {
+                unset(self::$defaultProperties[$c][$k]);
+            }
+        }
+
+        foreach (self::$defaultProperties[$c] as $k => $v) {
+            if ($this->$k !== $v) {
+                $properties[] = $k;
+            }
+        }
+
+        return $properties;
+    }
 }