From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 19 Dec 2016 23:07:42 -0500
Subject: [PATCH] Prevent Pathfinding out of World Border

This prevents Entities from trying to run outside of the World Border

diff --git a/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java b/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
index 25bc3adfad956157cef0953e6e632b7b7e352f3a..c3082f5dd64413a47421cb01538bec846bf21d2c 100644
--- a/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
+++ b/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
@@ -148,7 +148,7 @@ public abstract class PathNavigation {
             // Paper start - Pathfind event
             boolean copiedSet = false;
             for (BlockPos possibleTarget : set) {
-                if (!new com.destroystokyo.paper.event.entity.EntityPathfindEvent(getEntity().getBukkitEntity(),
+                if (!getEntity().getCommandSenderWorld().getWorldBorder().isInBounds(possibleTarget) || !new com.destroystokyo.paper.event.entity.EntityPathfindEvent(getEntity().getBukkitEntity(), // Paper - don't path out of world border
                     MCUtil.toLocation(getEntity().level, possibleTarget), target == null ? null : target.getBukkitEntity()).callEvent()) {
                     if (!copiedSet) {
                         copiedSet = true;