The fix is, if the file was saved on the highest multires level, then mesh contains a copy of the vertices anyway, and we can just copy it back into multires. Otherwise, multires is removed from the mesh to avoid a crash.
The fix is, if the file was saved on the highest multires level, then mesh contains a copy of the vertices anyway, and we can just copy it back into multires. Otherwise, multires is removed from the mesh to avoid a crash.