From 74c1e1dfd8eaaa86e68838b823ebd5177f007066 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Tue, 12 Apr 2016 23:06:56 -0500
Subject: [PATCH] Only allow non-zero maxDistance BlockIterators

They can iterate infinitely causing the server to hang.
Fix your plugins!

diff --git a/src/main/java/org/bukkit/util/BlockIterator.java b/src/main/java/org/bukkit/util/BlockIterator.java
index 5c85778..0f34c66 100644
--- a/src/main/java/org/bukkit/util/BlockIterator.java
+++ b/src/main/java/org/bukkit/util/BlockIterator.java
@@ -52,6 +52,7 @@ public class BlockIterator implements Iterator<Block> {
      *
      */
     public BlockIterator(World world, Vector start, Vector direction, double yOffset, int maxDistance) {
+        com.google.common.base.Preconditions.checkArgument(maxDistance != 0, "maxDistance cannot be 0!"); // Paper - Only allow non-zero maxDistance
         this.world = world;
         this.maxDistance = maxDistance;
 
-- 
2.8.0