Minecraft 15w35d, Minecraft 15w35e, Minecraft 15w45a, Minecraft 15w51b, Minecraft 16w03a, Minecraft 16w04a, Minecraft 1.9, Minecraft 1.9.1, Minecraft 1.9.2, Minecraft 1.9.3 Pre-Release 1, Minecraft 1.9.3 Pre-Release 2, Minecraft 1.9.3 Pre-Release 3
Warning: this bug is server-only.
Place a command block (Impulse, Unconditionnal, Needs Redstone).
Enter this command :
Place a redstone block next to this command block. Now everyone near this command_block is getting kicked from the server, with this error :
Here is the consol log :
Happens when alimented with a lever, a button (stone & wood), a repeater, a comparator, a redstone wire (any kind of alimentation works).
BIGGEST PROBLEM : If you do this in a spawn chunk, you can't come back because it seems to instant-kick every player near the CM, except if someone put a command like /tp PLAYER @p in a repeating command block.
See Marcono1234's comment for a description of why this happens