Ayke Halder authored Dec 21, 2020 and Christian Kuhn committed Dec 22, 2020

The form upgrade wizard skips a form content element if it has broken
flexform data.

Reasons for broken flexform data:
* There is no data other than a base XML-structure
* The data is invalid XML

Resolves: #93146
Releases: master, 10.4
Change-Id: I1c2d9f9bf0a6e32a6d4051084c71306465e470c9
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/67233


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>