Collectible Card Game Headquarters

I thought I remembered this being reported but couldn't find it in a search.

Describe the Bug:
Playing or using Karakas to unsummon a legand causes the game to crash.

Which card did behave improperly ?
Karakas

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
Manalink 2015/12/25: Battle For Zendikar,duel

What exactly should be the correct behavior/interaction ?
no crash

Are any other cards possibly affected by this bug ?
-

Plus, it neither tapped itself nor bounced its target. Fixed d7c728e.