Paper/Spigot-Server-Patches/0136-Don-t-allow-entities-to-ride-themselves-572.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Alfie Cleveland <alfeh@me.com>
Date: Sun, 8 Jan 2017 04:31:36 +0000
Subject: [PATCH] Don't allow entities to ride themselves - #572
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index de126bf6c95e90dd9a81ee8d815806b8908709ec..e36855b969bdef5e85e6b29879f960b0675a7937 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -1950,6 +1950,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
}
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protected boolean addPassenger(Entity entity) { // CraftBukkit
+ if (entity == this) throw new IllegalArgumentException("Entities cannot become a passenger of themselves"); // Paper - issue 572
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if (entity.getVehicle() != this) {
throw new IllegalStateException("Use x.startRiding(y), not y.addPassenger(x)");
} else {