[Serializer] Fix ObjectNormalizer gives warnings on normalizing with public static property

Author: alaugks

Normalizer/ObjectNormalizer.php

@@ -197,7 +197,7 @@ protected function isAllowedAttribute($classOrObject, string $attribute, ?string
 
         if ($context['_read_attributes'] ?? true) {
             if (!isset(self::$isReadableCache[$class.$attribute])) {
-                self::$isReadableCache[$class.$attribute] = (\is_object($classOrObject) && $this->propertyAccessor->isReadable($classOrObject, $attribute)) || $this->propertyInfoExtractor->isReadable($class, $attribute) || $this->hasAttributeAccessorMethod($class, $attribute);
+                self::$isReadableCache[$class.$attribute] = $this->propertyInfoExtractor->isReadable($class, $attribute) || $this->hasAttributeAccessorMethod($class, $attribute) || (\is_object($classOrObject) && $this->propertyAccessor->isReadable($classOrObject, $attribute));
             }
 
             return self::$isReadableCache[$class.$attribute];

Tests/Normalizer/ObjectNormalizerTest.php

@@ -927,6 +927,16 @@ public function testDenormalizeWithPropertyPath()
 
         $this->assertEquals($expected, $obj);
     }
+
+    public function testObjectNormalizerWithAttributeLoaderAndObjectHasStaticProperty()
+    {
+        $class = new class {
+            public static string $foo;
+        };
+
+        $normalizer = new ObjectNormalizer(new ClassMetadataFactory(new AttributeLoader()));
+        $this->assertSame([], $normalizer->normalize($class));
+    }
 }
 
 class ProxyObjectDummy extends ObjectDummy