Game goes into "Not Responding" mode after doing /kick @p and does not respond. Turns into crash.

[0605/234529:INFO:GameCallbacks.cpp(178)] game/tl (Server thread) info Kumasasa lost connection: Disconnected
[0605/234529:INFO:GameCallbacks.cpp(178)] game/net.minecraft.server.MinecraftServer (Server thread) info Kumasasa left the game
[0605/234529:INFO:GameCallbacks.cpp(178)] game/tl (Server thread) info Stopping singleplayer server as player logged out
[0605/234529:INFO:GameCallbacks.cpp(178)] game/net.minecraft.server.MinecraftServer (Server thread) info [Kumasasa: Kicked Kumasasa: Kicked by an operator]
[0605/234529:INFO:GameCallbacks.cpp(178)] game/hu (Server thread) warn handleDisconnection() called twice
[0605/234529:INFO:GameCallbacks.cpp(178)] game/net.minecraft.server.MinecraftServer (Server thread) info Stopping server
[0605/234529:INFO:GameCallbacks.cpp(178)] game/net.minecraft.server.MinecraftServer (Server thread) info Saving players
[0605/234529:INFO:GameCallbacks.cpp(178)] game/net.minecraft.server.MinecraftServer (Server thread) info Saving worlds
[0605/234529:INFO:GameCallbacks.cpp(178)] game/net.minecraft.server.MinecraftServer (Server thread) info Saving chunks for level 'MojiraTest13-p1'/overworld
[0605/234529:INFO:GameCallbacks.cpp(178)] game/net.minecraft.server.MinecraftServer (Server thread) info Saving chunks for level 'MojiraTest13-p1'/the_nether
[0605/234529:INFO:GameCallbacks.cpp(178)] game/net.minecraft.server.MinecraftServer (Server thread) info Saving chunks for level 'MojiraTest13-p1'/the_end