I have recently encountered a bug with a village. This may not be with all, but the bug/glitch is that the stair part of the villages on the roof are missing. Two houses i saw had a square-part missing. I have a few pictures of them.
I also felt like making the roof for one for the villagers
this was not a village i ever encountered, i never encountered a village in this world. It was a Flat land.

House without roof: http://prntscr.com/89xi8k
House with half missing:http://prntscr.com/89xkjn
Another House with roof missing: http://prntscr.com/89xlzt
Lucky House i built the roof : http://prntscr.com/89xmp8
this may not be a bug or glitch, this may just be a weird world Generation, but i've never seen this before until this village generated so im guessing it may not be on purpose (hope)
Thanks! - Democreeper5