Yasuo bug; Killed by Yasuo despite taking no damage from Yasuo
https://www.youtube.com/watch?v=kNM-4Kt_RQA
Video largely says it all. Was tower diving Yasuo. Yas never got in range to deal any damage, but the kill was still awarded to Yasuo instead of just being an execute.
My only theory is that the wind wall counted the Malzahar ult as a projectile, and hence counted Yasuo as participating in the kill.