Seems like an oversight in {rB86635402d516}?
Stumbled over this while investigating another report, but this line in
its current form does not make sense (was taking derivedFinal - not
derivedDeform - prior so I assume this has to be
BKE_object_get_evaluated_mesh now).
(it is now only used for vertex parenting where this should not be an
issue, but best keep this generic).
Differential Revision: https://developer.blender.org/D12425