public static function unstackErrors()
    {
        $level = array_pop(self::$stackedErrorLevels);

        if (null !== $level) {
            $errorReportingLevel = error_reporting($level);
            if ($errorReportingLevel !== ($level | E_PARSE | E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR)) {
                // If the user changed the error level, do not overwrite it
                error_reporting($errorReportingLevel);
            }
        }

        if (empty(self::$stackedErrorLevels)) {
            $errors = self::$stackedErrors;
            self::$stackedErrors = array();

            foreach ($errors as $error) {
                $error[0]->log($error[1], $error[2], $error[3]);
            }
        }
    }