From 5cd832a59e9ffb7debd54ba65a6fdea2ec4cc8d2 Mon Sep 17 00:00:00 2001
From: Romain Canon <romain.hydrocanon@gmail.com>
Date: Wed, 11 Sep 2019 15:39:42 +0200
Subject: [PATCH] [BUGFIX] Handle invalid cache entry

---
 Classes/Form/FormObject/FormObjectFactory.php | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/Classes/Form/FormObject/FormObjectFactory.php b/Classes/Form/FormObject/FormObjectFactory.php
index 4d283af..b042cb6 100644
--- a/Classes/Form/FormObject/FormObjectFactory.php
+++ b/Classes/Form/FormObject/FormObjectFactory.php
@@ -214,9 +214,11 @@ protected function getStaticInstance($className)
         if (false === isset($this->static[$cacheIdentifier])) {
             $cacheInstance = $this->getCacheInstance();
 
-            if ($cacheInstance->has($cacheIdentifier)) {
-                $static = $cacheInstance->get($cacheIdentifier);
-            } else {
+            $static = $cacheInstance->has($cacheIdentifier)
+                ? $cacheInstance->get($cacheIdentifier)
+                : null;
+
+            if (!$static instanceof FormObjectStatic) {
                 $static = $this->buildStaticInstance($className);
                 $static->getObjectHash();