Villagers Breeding

There's a crash

What I expected to happen was...:
Breeding villagers in sunset

What actually happened was...:
When villagers are about to breed there's a crash report

Steps to Reproduce:
1. Make building like there http://www.youtube.com/watch?v=vguISJ1wr4M This 1st one!
2. Spawn there two villagers
3. Wait for sunset