From 17b7e7a2d3ad65237784d2d68b538ba13df67153 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 21 Sep 2016 23:48:39 -0400
Subject: [PATCH] Auto fix bad Y levels on player login

Bring down to a saner Y level if super high, as this can cause the server to crash

diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java
index 088475d8f6..d61d159d11 100644
--- a/src/main/java/net/minecraft/server/EntityPlayer.java
+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
@@ -191,6 +191,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
     @Override
     public void a(NBTTagCompound nbttagcompound) {
         super.a(nbttagcompound);
+        if (this.locY > 300) this.locY = 257; // Paper - bring down to a saner Y level if out of world
         if (nbttagcompound.hasKeyOfType("playerGameType", 99)) {
             if (this.getMinecraftServer().getForceGamemode()) {
                 this.playerInteractManager.setGameMode(this.getMinecraftServer().getGamemode());
-- 
2.21.0