From bf50a3b15c70441a72ec3012319cd63425ba4d20 Mon Sep 17 00:00:00 2001
From: Eric Roberts <eric@cryode.com>
Date: Sun, 27 May 2012 19:04:43 -0500
Subject: Fix issue where cache backup is ignored on first call.

---
 system/libraries/Cache/Cache.php | 38 +++++++++++++++++---------------------
 1 file changed, 17 insertions(+), 21 deletions(-)

diff --git a/system/libraries/Cache/Cache.php b/system/libraries/Cache/Cache.php
index ba732ee8e..53f9f81a7 100644
--- a/system/libraries/Cache/Cache.php
+++ b/system/libraries/Cache/Cache.php
@@ -68,7 +68,7 @@ class CI_Cache extends CI_Driver_Library {
 	 *
 	 * @param string
 	 */
-	protected $_backup_driver;
+	protected $_backup_driver = 'dummy';
 
 	/**
 	 * Constructor
@@ -102,6 +102,22 @@ class CI_Cache extends CI_Driver_Library {
 				$this->_backup_driver = $config['backup'];
 			}
 		}
+
+		// If the specified adapter isn't available, check the backup.
+		if ( ! $this->is_supported($this->_adapter))
+		{
+			if ( ! $this->is_supported($this->_backup_driver))
+			{
+				// Backup isn't supported either. Default to 'Dummy' driver.
+				log_message('error', 'Cache adapter "'.$this->_adapter.'" and backup "'.$this->_backup_driver.'" are both unavailable. Cache is now using "Dummy" adapter.');
+				$this->_adapter = 'dummy';
+			}
+			else
+			{
+				// Backup is supported. Set it to primary.
+				$this->_adapter = $this->_backup_driver;
+			}
+		}
 	}
 
 	// ------------------------------------------------------------------------
@@ -206,26 +222,6 @@ class CI_Cache extends CI_Driver_Library {
 		return $support[$driver];
 	}
 
-	// ------------------------------------------------------------------------
-
-	/**
-	 * __get()
-	 *
-	 * @param	child
-	 * @return	object
-	 */
-	public function __get($child)
-	{
-		$obj = parent::__get($child);
-
-		if ( ! $this->is_supported($child))
-		{
-			$this->_adapter = $this->_backup_driver;
-		}
-
-		return $obj;
-	}
-
 }
 
 /* End of file Cache.php */
-- 
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