TYPO3 Core

Extbase extensions might fail with:

Fatal error: Call to a member function enableFields() on a non-object in .../typo3_src/typo3/sysext/core/Classes/Resource/StorageRepository.php on line 211

The problem was "uncovered" with the #45498 (the new EM fatals with this error since this patch), but could happen in other situations too.

Reason is that Extbase in certain situations will try to create a dummy simulated "TSFE" object to be able to use cObject stdWrap's in the backend context.

Now this is not a "complete TSFE" and doesn't for example include a proper sys_page property.

So to make sure we are in a proper FE context, we shouldn't rely on "is_object($TSFE)" but instead check if TYPO3_MODE==FE like it is done throughout other places in the core.