From d11a8e763b8d40afcfb60ecbda4c3c53a111b005 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/server/NavigationAbstract.java b/src/main/java/net/minecraft/server/NavigationAbstract.java
index 2a391be28..0586597e7 100644
--- a/src/main/java/net/minecraft/server/NavigationAbstract.java
+++ b/src/main/java/net/minecraft/server/NavigationAbstract.java
@@ -100,6 +100,7 @@ public abstract class NavigationAbstract {
     @Nullable
     protected PathEntity a(BlockPosition blockposition, Entity target, double d0, double d1, double d2, int i, boolean flag) {
         // Paper end
+        if (!getEntity().getWorld().getWorldBorder().isInBounds(blockposition)) return null; // Paper - don't path out of world border
         if (!this.a()) {
             return null;
         } else if (this.c != null && !this.c.b() && blockposition.equals(this.q)) {
diff --git a/src/main/java/net/minecraft/server/WorldBorder.java b/src/main/java/net/minecraft/server/WorldBorder.java
index 94d1c2be1..51739e254 100644
--- a/src/main/java/net/minecraft/server/WorldBorder.java
+++ b/src/main/java/net/minecraft/server/WorldBorder.java
@@ -19,7 +19,7 @@ public class WorldBorder {
 
     public WorldBorder() {}
 
-    public boolean a(BlockPosition blockposition) {
+    public final boolean isInBounds(BlockPosition blockposition) { return this.a(blockposition); } public boolean a(BlockPosition blockposition) { // Paper - OBFHELPER
         return (double) (blockposition.getX() + 1) > this.c() && (double) blockposition.getX() < this.e() && (double) (blockposition.getZ() + 1) > this.d() && (double) blockposition.getZ() < this.f();
     }
 
-- 
2.21.0