TYPO3 Core

We have used an include like this in one of the classes of an extension

require_once(PATH_tslib.'class.tslib_pibase.php');

This class was included inside the temporary config-cache files too. In general it worked fine but for the thumbs.php. During thumbnail generation the config-cache is loaded to. It failed because of the missng PATH_tslib constant.

I think it does no harm to define this constant inside thumbs.php even if it isn't needed there. It avoids such problems like ours.

(issue imported from #M15259)