From 52a8681d94a5ea7b67abdc6ef1e890901a0c6632 Mon Sep 17 00:00:00 2001
From: Phoenix616 <mail@moep.tv>
Date: Sun, 15 Sep 2019 11:32:32 -0500
Subject: [PATCH] Fix zero-tick instant grow farms MC-113809


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 29fd499683..7ddcaeaa75 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -568,6 +568,11 @@ public class PaperWorldConfig {
         disableRelativeProjectileVelocity = getBoolean("game-mechanics.disable-relative-projectile-velocity", false);
     }
 
+    public boolean fixZeroTickInstantGrowFarms = true;
+    private void fixZeroTickInstantGrowFarms() {
+        fixZeroTickInstantGrowFarms = getBoolean("fix-zero-tick-instant-grow-farms", fixZeroTickInstantGrowFarms);
+    }
+
     public boolean altItemDespawnRateEnabled;
     public Map<Material, Integer> altItemDespawnRateMap;
     private void altItemDespawnRate() {
diff --git a/src/main/java/net/minecraft/server/Block.java b/src/main/java/net/minecraft/server/Block.java
index e077359b02..619237d68d 100644
--- a/src/main/java/net/minecraft/server/Block.java
+++ b/src/main/java/net/minecraft/server/Block.java
@@ -44,6 +44,7 @@ public class Block implements IMaterial {
     private final float frictionFactor;
     protected final BlockStateList<Block, IBlockData> blockStateList;
     private IBlockData blockData;
+    public boolean randomTick = false; // Paper - fix MC-113809
     protected final boolean v;
     private final boolean g;
     @Nullable
diff --git a/src/main/java/net/minecraft/server/BlockBamboo.java b/src/main/java/net/minecraft/server/BlockBamboo.java
index ffb65776c5..3a9c3b54a9 100644
--- a/src/main/java/net/minecraft/server/BlockBamboo.java
+++ b/src/main/java/net/minecraft/server/BlockBamboo.java
@@ -85,6 +85,7 @@ public class BlockBamboo extends Block implements IBlockFragilePlantElement {
         if (!iblockdata.canPlace(world, blockposition)) {
             world.b(blockposition, true);
         } else if ((Integer) iblockdata.get(BlockBamboo.f) == 0) {
+            if (world.paperConfig.fixZeroTickInstantGrowFarms && !randomTick) return; // Paper - fix MC-113809
             if (world.random.nextInt(Math.max(1, (int) (100.0F / world.spigotConfig.bambooModifier) * 3)) == 0 && world.isEmpty(blockposition.up()) && world.getLightLevel(blockposition.up(), 0) >= 9) { // Spigot
                 int i = this.b((IBlockAccess) world, blockposition) + 1;
 
diff --git a/src/main/java/net/minecraft/server/BlockCactus.java b/src/main/java/net/minecraft/server/BlockCactus.java
index 29f9ff6c18..124b4b4b00 100644
--- a/src/main/java/net/minecraft/server/BlockCactus.java
+++ b/src/main/java/net/minecraft/server/BlockCactus.java
@@ -21,6 +21,7 @@ public class BlockCactus extends Block {
         if (!iblockdata.canPlace(world, blockposition)) {
             world.b(blockposition, true);
         } else {
+            if (world.paperConfig.fixZeroTickInstantGrowFarms && !randomTick) return; // Paper - fix MC-113809
             BlockPosition blockposition1 = blockposition.up();
 
             if (world.isEmpty(blockposition1)) {
diff --git a/src/main/java/net/minecraft/server/BlockChorusFlower.java b/src/main/java/net/minecraft/server/BlockChorusFlower.java
index 74fa4889ff..cde2524ca9 100644
--- a/src/main/java/net/minecraft/server/BlockChorusFlower.java
+++ b/src/main/java/net/minecraft/server/BlockChorusFlower.java
@@ -22,6 +22,7 @@ public class BlockChorusFlower extends Block {
         if (!iblockdata.canPlace(world, blockposition)) {
             world.b(blockposition, true);
         } else {
+            if (world.paperConfig.fixZeroTickInstantGrowFarms && !randomTick) return; // Paper - fix MC-113809
             BlockPosition blockposition1 = blockposition.up();
 
             if (world.isEmpty(blockposition1) && blockposition1.getY() < 256) {
diff --git a/src/main/java/net/minecraft/server/BlockReed.java b/src/main/java/net/minecraft/server/BlockReed.java
index ff674a9d5b..a4850c0705 100644
--- a/src/main/java/net/minecraft/server/BlockReed.java
+++ b/src/main/java/net/minecraft/server/BlockReed.java
@@ -23,6 +23,7 @@ public class BlockReed extends Block {
         if (!iblockdata.canPlace(world, blockposition)) {
             world.b(blockposition, true);
         } else if (world.isEmpty(blockposition.up())) {
+            if (world.paperConfig.fixZeroTickInstantGrowFarms && !randomTick) return; // Paper - fix MC-113809
             int i;
 
             for (i = 1; world.getType(blockposition.down(i)).getBlock() == this; ++i) {
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index bd1e4dbaed..5b18f4bd52 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -568,7 +568,9 @@ public class WorldServer extends World {
                         IBlockData iblockdata = chunksection.getType(blockposition2.getX() - j, blockposition2.getY() - j1, blockposition2.getZ() - k);
 
                         if (iblockdata.q()) {
+                            iblockdata.getBlock().randomTick = true; // Paper - fix MC-113809
                             iblockdata.b((World) this, blockposition2, this.random);
+                            iblockdata.getBlock().randomTick = false; // Paper - fix MC-113809
                         }
 
                         Fluid fluid = iblockdata.p();
-- 
2.22.1