"/spawnpoint <player>" (without coordinates) is not working

What I expected to happen was...:
That the games set the spawnpoint for the target player (doesnt matter if @p or direct name).
That it does the same as /spawnpoint just for a targeted player
That it works like in 14w25b

What actually happened was...:
An Error Named:
"Usage: /spawnpoint OR /spawnpoint <player> OR /spawnpoint <player> <x> <y> <z>

Steps to Reproduce:
Type /spawnpoint @p in 14w26c