There is an implementation flaw in the render graph where local pointers
cannot be updated, but the data it refers to can be reallocated to
another location.
The cause of this is that the nodes use an union, which can only contain
simple constructed structs (eg memcpy). this union is stored in a vector
and can relocate the union. Any local pointers can (and will) become
invalid.
This PR is a quick fix by updating the pointers just before sending
them to the command buffer. In future a better fox needs to be done
as part of #121649.
Pull Request: https://projects.blender.org/blender/blender/pulls/121723
b998697d4f