TYPO3 Core

From class.ux_t3lib_db.php in the current trunk:

function handler_getFromTableList($tableList)    {

$key = $tableList;

if (!isset($this->cache_handlerKeyFromTableList[$key]))    {

// Get tables separated:
            $_tableList = $tableList;
            $tableArray = $this->SQLparser->parseFromTables($_tableList);

// If success, traverse the tables:
            if (is_array($tableArray) && count($tableArray))    {
                foreach($tableArray as $vArray)    {

// Find handler key, select "_DEFAULT" if none is specifically configured:
                    $handlerKey = $this->table2handlerKeys[$vArray['table']] ? $this->table2handlerKeys[$vArray['table']] : '_DEFAULT';

// In case of separate handler keys for joined tables:
                    if ($outputHandlerKey && $handlerKey != $outputHandlerKey)    {
                        die('DBAL fatal error: Tables in this list "'.$tableList.'" didn\'t use the same DB handler!');
                    }

$outpuHandlerKey is never intialized. So the if never is triggered.

(issue imported from #M7295)