Story #69617: FormEngine bugs
InvalidPointerFieldValueException needs to be caught
\TYPO3\CMS\Core\Configuration\FlexForm\FlexFormTools::getDataStructureIdentifierFromRecord tries to resolve the data structure of a record from another record in the database. This is a common practice in TemplaVoilà for instance.
If the identifier is an empty string or 0 (zero), a InvalidPointerFieldValueException is thrown, which is the right thing to do in the mentioned method.
Problem is, that the Exception is not caught in
The exception says, the problem is most likely a wrong configured TCA, which is not right if there is just no relation (yet) to a datastructure record. Thus, the exception needs to be handled properly during further execution.
Usual use case:
During the localization of a content element, the overlay usually does not get the same identifier value as its parent, thus the whole localization fails.