The crash happens because the origindex layers created as part of
the modifier stack evaluation are not set in the `MeshRenderData` when
they should have been.
This is because when selecting in X-ray mode, a subdivision wrapper
is created to ensure that selection happens with a subdivided
geometry, and this replaces the `MDATA` wrapper which is also used to
setup the `MeshRenderData`.
As we do not seemingly have an `MDATA` wrapper, the draw code decides
that we can extract draw buffers directly from the BMesh, instead of
the mapped Mesh with origin indices layers.
To fix this, we should also consider to use mapped extraction if a
subdivision wrapper exists on the mesh.
Differential Revision: https://developer.blender.org/D14485
ba28c10199