From e487f075c4ec8ea6121af9414ec666fe30eea314 Mon Sep 17 00:00:00 2001
From: Samuel Georges <sam@daftspunk.com>
Date: Thu, 26 Feb 2015 23:08:38 +1100
Subject: [PATCH] Fixes issue in CodeParser where it tries to use a class that
 doesn't exist Adds context to filterFields() model override

---
 modules/backend/widgets/Form.php   |  2 +-
 modules/cms/classes/CodeParser.php | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/modules/backend/widgets/Form.php b/modules/backend/widgets/Form.php
index 2c97819ba..14a720ba2 100644
--- a/modules/backend/widgets/Form.php
+++ b/modules/backend/widgets/Form.php
@@ -846,7 +846,7 @@ class Form extends WidgetBase
     protected function applyFiltersFromModel()
     {
         if (method_exists($this->model, 'filterFields')) {
-            $this->model->filterFields((object) $this->fields);
+            $this->model->filterFields((object) $this->fields, $this->getContext());
         }
     }
 
diff --git a/modules/cms/classes/CodeParser.php b/modules/cms/classes/CodeParser.php
index a566d4972..f381e2f37 100644
--- a/modules/cms/classes/CodeParser.php
+++ b/modules/cms/classes/CodeParser.php
@@ -155,9 +155,31 @@ class CodeParser
             require_once $data['filePath'];
         }
 
+        if (!class_exists($className) && ($data = $this->handleCorruptCache())) {
+            $className = $data['className'];
+        }
+
         return new $className($page, $layout, $controller);
     }
 
+    /**
+     * In some rare cases the cache file will not contain the class
+     * name we expect. When this happens, destroy the corrupt file,
+     * flush the request cache, and repeat the cycle.
+     * @return void
+     */
+    protected function handleCorruptCache()
+    {
+        $path = $this->getFilePath();
+        if (File::isFile($path)) {
+            File::delete($path);
+        }
+
+        unset(self::$cache[$this->filePath]);
+
+        return $this->parse();
+    }
+
     /**
      * Evaluates PHP content in order to detect syntax errors.
      * The method handles PHP errors and throws exceptions.