TYPO3 Core

Warning: array_unique() [function.array-unique]: The argument should be an array in .\t3lib\class.t3lib_tceforms_inline.php on line 1831

I have to nested tables with a IRRE child:

$TCA['tt_news'] = Array (
...

'tx_ppaddfields_beitraege' => array (        
            'exclude' => 1,        
            'label' => 'beitraege',        
            'config' => array (
                'type' => 'inline',
                'foreign_table' => 'tx_pp_beitraege',
                'maxitems' => 10,
                'appearance' => Array(
                    'collapseAll' => 1,
                    'expandSingle' => 1,
                    'newRecordLinkAddTitle' => 1,
                )        
            )
        ),
...
)

$TCA['tx_pp_beitraege'] = Array (
...

'infobox' => array (        
            'exclude' => 1,        
            'label' => 'infobox',        
            'config' => array (
                'type' => 'inline',
                'foreign_table' => 'tx_pp_infobox',
                'maxitems' => 10,
                'appearance' => Array(
                    'collapseAll' => 1,
                    'expandSingle' => 1,
                    'newRecordLinkAddTitle' => 1,
                )        
            )
        ),

...
)

If I trie to make a new record tx_pp_infobox and save the nested record construct I run into the warning message.

(issue imported from #M7855)