Blender Version
Broken: 1b18e15802 (also on facdc15fdd)
Short description of error
Dupli-verts or dupli-faces not working.
Exact steps for others to reproduce the error
- Parent lamp to default cube, set cube Duplication to Verts.
Or open this 2.79 file that has a torus in each of the (vertex-only) cube vertices: