Exception in grid handling in order context

[alexh-swdev]

Preconditions (*)

OM Version OM 20.11.0
PHP 8.3

Steps to reproduce (*)

In my case: click on an order

Expected result (*)

It works :)

Actual result (*)

Cannot access offset of type array on array in /app/app/code/core/Mage/Adminhtml/Block/Widget/Grid.php:348

Is this probably a side effect of #4225 ?

Is there a check missing in the OM code?
Do I have to adjust some config or adjust the 3rd party code?

The offending call comes from Mirasvit/RMA. It tries to add this colum:

if (in_array('customer_name', $columns)) {
            $this->addColumn('name', array(
                'header' => Mage::helper('rma')->__('Customer Name'),
                'index' => array('firstname', 'lastname'),
                'type' => 'concat',
                'separator' => ' ',
                'filter_index' => new Zend_Db_Expr("CONCAT(firstname, ' ', lastname)"),
                'frame_callback' => array($this, 'filterXss'),
                )
            );
        }

[sreichel]

True.

[alexh-swdev]

That was quick! Looks good for me now. (Pages are loading, and sorting and filtering are working)

[sreichel]

Is there a check missing in the OM code?

Yep. Index column with array data was not covered. Thanks.