A command that crashes worlds

running /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /execute @e ~~~ /summon ender_dragon crashes the world (abused by hackers)