Villagers can ride mine carts while in a boat. The mine cart will also be powered.

I was riding a boat and was transporting a villager when I went near a minecart and the villager hopped in the minecart with me in it. The rail was also powered when I was riding along.

What I expected to happen was...:
I was expecting the minecart to move away.

What actually happened was...:
(explained in summary)

Steps to Reproduce:
1.Ride a boat
2. Get a villager in the boat
3. go near a minecart

4. Observe