TYPO3 Core

Using the old interface must still work!

it is in the mapping, but there seems still to be a problem, it seems to work on non case sensitive filesystems, but doesn't on case sensitive systems. example extension to reproduce is enetcache: just install and then try to add a task.

Fatal error: Declaration of tx_enetcache_task_DropTags_AdditionalFieldProvider::getAdditionalFields() must be compatible with that of TYPO3\CMS\Scheduler\AdditionalFieldProviderInterface::getAdditionalFields() in ....

I got this one as well and Thomas and I discovered it is related to an outdated PHP version ( < 5.3.8).

We have to develop some workaround for lower versions which we have to support as well (current official Debian version is 5.3.3)