I wanted to summon a villager who should buy a bottle of water and sell a potion of night vision.

What I expected to happen was...:
He would sell me the potion.

What actually happened was...:
He didn't even see the water bottle in my inventory!

(After that, I tried to use {Potion:"minecraft:water"} instead of {Potion:water}, and it worked! But it's inconvenient to use in such way!)

Steps to Reproduce:
1. Run the command in command.txt

2. Try to buy the potion.