From 2a84e2d7242ff8c813cb8afabb05db08a9239546 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 18 Mar 2016 14:24:53 -0400
Subject: [PATCH] Fix Furnace cook time bug

If the server lags out and skips multiple ticks, Furnace cooking behavior would not
cook in the expected amount of time as the cook time was not decremented correctly.

This patch ensures that furnaces cook to the correct wall time expectation.

diff --git a/src/main/java/net/minecraft/server/TileEntityFurnace.java b/src/main/java/net/minecraft/server/TileEntityFurnace.java
index fd6c246..db235c3 100644
--- a/src/main/java/net/minecraft/server/TileEntityFurnace.java
+++ b/src/main/java/net/minecraft/server/TileEntityFurnace.java
@@ -172,7 +172,7 @@ public class TileEntityFurnace extends TileEntityContainer implements ITickable,
         if (this.isBurning() && this.canBurn()) {
             this.cookTime += elapsedTicks;
             if (this.cookTime >= this.cookTimeTotal) {
-                this.cookTime = 0;
+                this.cookTime -= this.a(this.items[0]); // Paper
                 this.cookTimeTotal = this.a(this.items[0]);
                 this.burn();
                 flag1 = true;
-- 
2.9.0