PaperMC/patches/server/0327-Do-not-allow-Vexes-to-load-chunks.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: chickeneer <emcchickeneer@gmail.com>
Date: Tue, 17 Mar 2020 14:18:50 -0500
Subject: [PATCH] Do not allow Vexes to load chunks


diff --git a/src/main/java/net/minecraft/world/entity/monster/Vex.java b/src/main/java/net/minecraft/world/entity/monster/Vex.java
index 1a5a61f3c6587992acadc83d5dff97ae2fe53235..183a33b7d666d652b455baa7e8339e9c4a870a58 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Vex.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Vex.java
@@ -354,7 +354,10 @@ public class Vex extends Monster implements TraceableEntity {
             for (int i = 0; i < 3; ++i) {
                 BlockPos blockposition1 = blockposition.offset(Vex.this.random.nextInt(15) - 7, Vex.this.random.nextInt(11) - 5, Vex.this.random.nextInt(15) - 7);
 
-                if (Vex.this.level().isEmptyBlock(blockposition1)) {
+                // Paper start - Don't load chunks
+                final net.minecraft.world.level.block.state.BlockState blockState = Vex.this.level().getBlockStateIfLoaded(blockposition1);
+                if (blockState != null && blockState.isAir()) {
+                    // Paper end - Don't load chunks
                     Vex.this.moveControl.setWantedPosition((double) blockposition1.getX() + 0.5D, (double) blockposition1.getY() + 0.5D, (double) blockposition1.getZ() + 0.5D, 0.25D);
                     if (Vex.this.getTarget() == null) {
                         Vex.this.getLookControl().setLookAt((double) blockposition1.getX() + 0.5D, (double) blockposition1.getY() + 0.5D, (double) blockposition1.getZ() + 0.5D, 180.0F, 20.0F);