Debug Helper

gistfile1.txt

<?php 

class Mage_Core_Block_Template:

public function fetchView($fileName):

if (strpos($includeFilePath, realpath($this->_viewDir)) === 0 || $this->_getAllowSymlinks()) {
    if (empty($includeFilePath)) {
        Mage::log("Resulting in empty includeFilePath: $fileName");
    } else {
        include $includeFilePath;
    }
} else {
    Mage::log('Not valid template file:'.$fileName, Zend_Log::CRIT, null, null, true);
}