From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 10 May 2020 22:12:46 -0400
Subject: [PATCH] Ensure Entity AABB's are never invalid


diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 11ae525a5d2bd29bfe658d683c53a0ab2626616a..fd0cef886761e71fe331aa60806c186c23ed19bc 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -540,7 +540,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
 
     public void setPos(double x, double y, double z) {
         this.setPosRaw(x, y, z);
-        this.setBoundingBox(this.makeBoundingBox());
+        // this.setBoundingBox(this.makeBoundingBox()); // Paper - move into setPositionRaw
     }
 
     protected AABB makeBoundingBox() {
@@ -3717,6 +3717,12 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
     }
 
     public final void setPosRaw(double x, double y, double z) {
+        // Paper start - never allow AABB to become desynced from position
+        // hanging has its own special logic
+        if (!(this instanceof net.minecraft.world.entity.decoration.HangingEntity) && (this.position.x != x || this.position.y != y || this.position.z != z)) {
+            this.setBoundingBox(this.dimensions.makeBoundingBox(x, y, z));
+        }
+        // Paper end
         if (this.position.x != x || this.position.y != y || this.position.z != z) {
             this.position = new Vec3(x, y, z);
             int i = Mth.floor(x);