diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php
index f84b4665ee..d384659259 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php
@@ -83,6 +83,9 @@ EOF
             $this->warmup($warmupDir, $realCacheDir, !$input->getOption('no-optional-warmers'));
 
             $filesystem->rename($realCacheDir, $oldCacheDir);
+            if (defined('PHP_WINDOWS_VERSION_BUILD')) {
+                sleep(1);  // workaround for windows php rename bug
+            }
             $filesystem->rename($warmupDir, $realCacheDir);
         }
 
diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index b717921cad..4e0c89a3e5 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -58,8 +58,8 @@ abstract class Kernel implements KernelInterface, TerminableInterface
     protected $booted;
     protected $name;
     protected $startTime;
-    protected $classes;
     protected $loadClassCache;
+    protected $errorReportingLevel;
 
     const VERSION         = '2.3.4-DEV';
     const VERSION_ID      = '20304';
@@ -83,7 +83,6 @@ abstract class Kernel implements KernelInterface, TerminableInterface
         $this->booted = false;
         $this->rootDir = $this->getRootDir();
         $this->name = $this->getName();
-        $this->classes = array();
         $this->bundles = array();
 
         if ($this->debug) {