Only variables should be assigned by reference in class_dm_threadpost.php(764)

[postcd]

Hello,

in vbulletin 4.2.5 + PHP 5.6.40 error log, i found an error:
PHP Strict Standards: Only variables should be assigned by reference in /includes/class_dm_threadpost.php(764) : eval()'d code on line 113

line 113 in that file is: parent::__construct($registry, $errtype);
line 764 is empty

I have found some post here (https://vborg.vbsupport.ru/archive/index.php/t-270346-p-2.html) by Dave where is suggested some replacement:

parent::vB_DataManager($registry, $errtype);
to
parent::__construct($registry, $errtype);

i have also seen "Only variables should be assigned by reference" error for /register.php file, this line:
$userdata =& datamanager_init('User', $vbulletin, ERRTYPE_ARRAY);

So i tried to switch to PHP 5.5.38, but i do not know if it will help.

Can You advise how to modify mentioned lines so it is correct?

[Dave]

If the error says "eval()'d" that means it's caused by a hook of an installed plugin.
If you look at line 764 of /includes/class_dm_threadpost.php, it should state which registered hook is causing it. You can then go to the hook manager page which shows all registered hooks and determine which plugin might be causing it.