Allow enabling sand duping (#10191)

Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable.

It should be noted that this decision does not promise all future exploits will be configurable. 

1 files changed, 19 insertions, 0 deletions

diff --git a/patches/server/0538-add-consumeFuel-to-FurnaceBurnEvent.patch b/patches/server/0538-add-consumeFuel-to-FurnaceBurnEvent.patch
new file mode 100644
index 0000000000..bfdd2e8c45
--- /dev/null
+++ b/patches/server/0538-add-consumeFuel-to-FurnaceBurnEvent.patch
@@ -0,0 +1,19 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <[email protected]>
+Date: Thu, 22 Apr 2021 16:45:28 -0700
+Subject: [PATCH] add consumeFuel to FurnaceBurnEvent
+
+
+diff --git a/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
+index d975e80b6a7849bcbabf20bf12f7d63ab1a6335f..c7ba7ac1a3869e4db1ef6b0350b3cab7f31a94c4 100644
+--- a/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
++++ b/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
+@@ -359,7 +359,7 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
+                 if (blockEntity.isLit() && furnaceBurnEvent.isBurning()) {
+                     // CraftBukkit end
+                     flag1 = true;
+-                    if (flag3) {
++                    if (flag3 && furnaceBurnEvent.willConsumeFuel()) { // Paper - add consumeFuel to FurnaceBurnEvent
+                         Item item = itemstack.getItem();
+ 
+                         itemstack.shrink(1);