PaperMC/patches/server/0871-Fix-a-bunch-of-vanilla-bugs.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Mon, 11 Jul 2022 11:56:41 -0700
Subject: [PATCH] Fix a bunch of vanilla bugs

https://bugs.mojang.com/browse/MC-253884
  show raid entity event to all tracking players

https://bugs.mojang.com/browse/MC-253721
  wrong msg for opping multiple players

https://bugs.mojang.com/browse/MC-248588
  respect mob griefing gamerule for draining water cauldrons

https://bugs.mojang.com/browse/MC-244739
  play goat eating sound for last item in stack

https://bugs.mojang.com/browse/MC-243057
  ignore furnace fuel slot in recipe book click

https://bugs.mojang.com/browse/MC-147659
  Some witch huts spawn the incorrect cat
  Note: Marked as Won't Fix, makes 0 sense

https://bugs.mojang.com/browse/MC-179072
  Creepers do not defuse when switching from Survival to Creative/Spectator

https://bugs.mojang.com/browse/MC-191591
  Fix items equipped on AbstractHorse losing NBT

https://bugs.mojang.com/browse/MC-259571
  Fix changeGameModeForPlayer to use gameModeForPlayer

https://bugs.mojang.com/browse/MC-262422
  Fix lightning being able to hit spectators

https://bugs.mojang.com/browse/MC-224454
  Fix mobs attempting to pathfind through azalea blocks

https://bugs.mojang.com/browse/MC-263999
  Fix mobs breaking doors not spawning block break particles

https://bugs.mojang.com/browse/MC-210802
  by: BillyGalbreath <Blake.Galbreath@Gmail.com>
  Fixes sheep eating blocks outside of ticking range

https://bugs.mojang.com/browse/MC-123848
  by: BillyGalbreath <blake.galbreath@gmail.com>
  Fixes item frames dropping items above when pointing down

https://bugs.mojang.com/browse/MC-264285
  Fix unbreakable flint and steel being consumed when igniting creepers

https://bugs.mojang.com/browse/MC-84789
  Fix wild wolves not considering bones interesting

Co-authored-by: William Blake Galbreath <blake.galbreath@gmail.com>

diff --git a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
index f651d866355557d10d4bb8730e0aceac483d3ba7..f2500cbe0aecf4959921a56c88a8947839a9b0e4 100644
--- a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
+++ b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
@@ -351,7 +351,7 @@ public interface DispenseItemBehavior {
                         }
                     }
                     // CraftBukkit end
-                    ((Saddleable) list.get(0)).equipSaddle(SoundSource.BLOCKS);
+                    ((Saddleable) list.get(0)).equipSaddle(SoundSource.BLOCKS, CraftItemStack.asNMSCopy(event.getItem())); // Paper - Fix saddles losing nbt data - MC-191591
                     // itemstack.shrink(1); // CraftBukkit - handled above
                     this.setSuccess(true);
                     return stack;
diff --git a/src/main/java/net/minecraft/server/commands/DeOpCommands.java b/src/main/java/net/minecraft/server/commands/DeOpCommands.java
index 40490d10649e92cf622849f1bb87538102b130c7..797efca662dcc0fe7f4cf0b4b7baa235ea044f1f 100644
--- a/src/main/java/net/minecraft/server/commands/DeOpCommands.java
+++ b/src/main/java/net/minecraft/server/commands/DeOpCommands.java
@@ -34,7 +34,7 @@ public class DeOpCommands {
                 playerList.deop(gameProfile);
                 ++i;
                 source.sendSuccess(() -> {
-                    return Component.translatable("commands.deop.success", targets.iterator().next().getName());
+                    return Component.translatable("commands.deop.success", gameProfile.getName()); // Paper - fixes MC-253721
                 }, true);
             }
         }
diff --git a/src/main/java/net/minecraft/server/commands/OpCommand.java b/src/main/java/net/minecraft/server/commands/OpCommand.java
index 6cd6d69a20e95e344fc18ab67dc300824537a59b..2e2a7c2cf3081187da817479a9da3eb10f662a6d 100644
--- a/src/main/java/net/minecraft/server/commands/OpCommand.java
+++ b/src/main/java/net/minecraft/server/commands/OpCommand.java
@@ -39,7 +39,7 @@ public class OpCommand {
                 playerList.op(gameProfile);
                 ++i;
                 source.sendSuccess(() -> {
-                    return Component.translatable("commands.op.success", targets.iterator().next().getName());
+                    return Component.translatable("commands.op.success", gameProfile.getName()); // Paper - fixes MC-253721
                 }, true);
             }
         }
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index 9209b598d7168b82574e4800056b8b9f84265dd0..469083208110d5735e1bbda7a15c55a032d0e8cc 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -1000,7 +1000,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
     }
     // Paper end
 
-    boolean anyPlayerCloseEnoughForSpawning(ChunkPos pos) {
+    public boolean anyPlayerCloseEnoughForSpawning(ChunkPos pos) { // Paper - public
         // Spigot start
         return this.anyPlayerCloseEnoughForSpawning(pos, false);
     }
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index 06df21e55fdb70558b85fc095a04b3bb64fbe770..c6a7aace64785f76792b03be08fb69e4cb93d1b3 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -1091,7 +1091,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
         } else {
             AABB axisalignedbb = (new AABB(blockposition1, new BlockPos(blockposition1.getX(), this.getMaxBuildHeight(), blockposition1.getZ()))).inflate(3.0D);
             List<LivingEntity> list = this.getEntitiesOfClass(LivingEntity.class, axisalignedbb, (entityliving) -> {
-                return entityliving != null && entityliving.isAlive() && this.canSeeSky(entityliving.blockPosition());
+                return entityliving != null && entityliving.isAlive() && this.canSeeSky(entityliving.blockPosition()) && !entityliving.isSpectator(); // Paper - Fix lightning being able to hit spectators (MC-262422)
             });
 
             if (!list.isEmpty()) {
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
index 6cc9c28032cafd15d884223a01208ce6f027c151..14bbc86bbaad49b2af16f3b171eb667c28eda702 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
@@ -92,7 +92,7 @@ public class ServerPlayerGameMode {
                 return event; // Paper
             }
             // CraftBukkit end
-            this.setGameModeForPlayer(gameMode, this.previousGameModeForPlayer);
+            this.setGameModeForPlayer(gameMode, this.gameModeForPlayer); // Paper - Fix MC-259571
             this.player.onUpdateAbilities();
             this.player.server.getPlayerList().broadcastAll(new ClientboundPlayerInfoUpdatePacket(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE, this.player), this.player); // CraftBukkit
             this.level.updateSleepingPlayerList();
diff --git a/src/main/java/net/minecraft/world/entity/Saddleable.java b/src/main/java/net/minecraft/world/entity/Saddleable.java
index effe4c4fb37fe13aece70cdef4966047d4719af9..7152674d3f3fb98198585cb5ece2bb88877345f9 100644
--- a/src/main/java/net/minecraft/world/entity/Saddleable.java
+++ b/src/main/java/net/minecraft/world/entity/Saddleable.java
@@ -9,6 +9,11 @@ public interface Saddleable {
     boolean isSaddleable();
 
     void equipSaddle(@Nullable SoundSource sound);
+    // Paper start - Fix saddles losing nbt data - MC-191591
+    default void equipSaddle(final @Nullable SoundSource sound, final @Nullable net.minecraft.world.item.ItemStack stack) {
+        this.equipSaddle(sound);
+    }
+    // Paper end
 
     default SoundEvent getSaddleSoundEvent() {
         return SoundEvents.HORSE_SADDLE;
diff --git a/src/main/java/net/minecraft/world/entity/ai/goal/BegGoal.java b/src/main/java/net/minecraft/world/entity/ai/goal/BegGoal.java
index 9a46007245399481fb6e749d95e9e4791e799250..2afca5652541c9166278f8f2590ddb81003ae579 100644
--- a/src/main/java/net/minecraft/world/entity/ai/goal/BegGoal.java
+++ b/src/main/java/net/minecraft/world/entity/ai/goal/BegGoal.java
@@ -65,7 +65,7 @@ public class BegGoal extends Goal {
     private boolean playerHoldingInteresting(Player player) {
         for(InteractionHand interactionHand : InteractionHand.values()) {
             ItemStack itemStack = player.getItemInHand(interactionHand);
-            if (this.wolf.isTame() && itemStack.is(Items.BONE)) {
+            if (!this.wolf.isTame() && itemStack.is(Items.BONE)) { // Paper - Fix MC-84789
                 return true;
             }
 
diff --git a/src/main/java/net/minecraft/world/entity/ai/goal/BreakDoorGoal.java b/src/main/java/net/minecraft/world/entity/ai/goal/BreakDoorGoal.java
index 784a894688f98f9d0368a36d456c5c94e1ee3695..a85885ee51df585fa11ae9f8fcd67ff2a71c5a18 100644
--- a/src/main/java/net/minecraft/world/entity/ai/goal/BreakDoorGoal.java
+++ b/src/main/java/net/minecraft/world/entity/ai/goal/BreakDoorGoal.java
@@ -77,9 +77,10 @@ public class BreakDoorGoal extends DoorInteractGoal {
                 return;
             }
             // CraftBukkit end
+            final net.minecraft.world.level.block.state.BlockState oldState = this.mob.level().getBlockState(this.doorPos); // Paper - fix MC-263999
             this.mob.level().removeBlock(this.doorPos, false);
             this.mob.level().levelEvent(1021, this.doorPos, 0);
-            this.mob.level().levelEvent(2001, this.doorPos, Block.getId(this.mob.level().getBlockState(this.doorPos)));
+            this.mob.level().levelEvent(2001, this.doorPos, Block.getId(oldState)); // Paper - fix MC-263999
         }
 
     }
diff --git a/src/main/java/net/minecraft/world/entity/ai/goal/EatBlockGoal.java b/src/main/java/net/minecraft/world/entity/ai/goal/EatBlockGoal.java
index b0caf52d00d8cd76550ab116291f8e11144a5e59..93bbda61f0eb2dd52573602b1f9cc7b031d1fc5a 100644
--- a/src/main/java/net/minecraft/world/entity/ai/goal/EatBlockGoal.java
+++ b/src/main/java/net/minecraft/world/entity/ai/goal/EatBlockGoal.java
@@ -31,6 +31,11 @@ public class EatBlockGoal extends Goal {
 
     @Override
     public boolean canUse() {
+        // Paper start - Fix MC-210802
+        if (!((net.minecraft.server.level.ServerLevel) this.level).chunkSource.chunkMap.anyPlayerCloseEnoughForSpawning(this.mob.chunkPosition())) {
+            return false;
+        }
+        // Paper end
         if (this.mob.getRandom().nextInt(this.mob.isBaby() ? 50 : 1000) != 0) {
             return false;
         } else {
diff --git a/src/main/java/net/minecraft/world/entity/ai/goal/SwellGoal.java b/src/main/java/net/minecraft/world/entity/ai/goal/SwellGoal.java
index 19540fd4a7f992888fadb6501d0c8a5a7e71fcf6..e241ae250f4f04a17ef2c583d00b065a4ca56a4c 100644
--- a/src/main/java/net/minecraft/world/entity/ai/goal/SwellGoal.java
+++ b/src/main/java/net/minecraft/world/entity/ai/goal/SwellGoal.java
@@ -21,6 +21,13 @@ public class SwellGoal extends Goal {
         return this.creeper.getSwellDir() > 0 || livingEntity != null && this.creeper.distanceToSqr(livingEntity) < 9.0D;
     }
 
+    // Paper start - Fix MC-179072
+    @Override
+    public boolean canContinueToUse() {
+        return !net.minecraft.world.entity.EntitySelector.NO_CREATIVE_OR_SPECTATOR.test(this.creeper.getTarget()) && canUse();
+    }
+    // Paper end
+
     @Override
     public void start() {
         this.creeper.getNavigation().stop();
diff --git a/src/main/java/net/minecraft/world/entity/animal/goat/Goat.java b/src/main/java/net/minecraft/world/entity/animal/goat/Goat.java
index c7b914cc0d702c6dd04add5247ec509d5870abb3..247aca0b612f5079a0596350e8311c385df8ab1c 100644
--- a/src/main/java/net/minecraft/world/entity/animal/goat/Goat.java
+++ b/src/main/java/net/minecraft/world/entity/animal/goat/Goat.java
@@ -237,9 +237,10 @@ public class Goat extends Animal {
             player.setItemInHand(hand, itemstack1);
             return InteractionResult.sidedSuccess(this.level().isClientSide);
         } else {
+            boolean isFood = this.isFood(itemstack); // Paper - track before stack is possibly decreased to 0 (Fixes MC-244739)
             InteractionResult enuminteractionresult = super.mobInteract(player, hand);
 
-            if (enuminteractionresult.consumesAction() && this.isFood(itemstack)) {
+            if (enuminteractionresult.consumesAction() && isFood) { // Paper
                 this.level().playSound((Player) null, (Entity) this, this.getEatingSound(itemstack), SoundSource.NEUTRAL, 1.0F, Mth.randomBetween(this.level().random, 0.8F, 1.2F));
             }
 
diff --git a/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java b/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java
index 6bab94ac458081e9ed6e1999a9a3f884dd710604..49d7109b6ca63c8073db777549a65b2fcb70967e 100644
--- a/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java
+++ b/src/main/java/net/minecraft/world/entity/animal/horse/AbstractHorse.java
@@ -250,7 +250,13 @@ public abstract class AbstractHorse extends Animal implements ContainerListener,
 
     @Override
     public void equipSaddle(@Nullable SoundSource sound) {
-        this.inventory.setItem(0, new ItemStack(Items.SADDLE));
+        // Paper start - Fix saddles losing nbt data - MC-191591
+        this.equipSaddle(sound, null);
+    }
+    @Override
+    public void equipSaddle(@Nullable SoundSource sound, @Nullable ItemStack stack) {
+        this.inventory.setItem(0, stack != null ? stack : new ItemStack(Items.SADDLE));
+        // Paper end
     }
 
     public void equipArmor(Player player, ItemStack stack) {
diff --git a/src/main/java/net/minecraft/world/entity/decoration/ItemFrame.java b/src/main/java/net/minecraft/world/entity/decoration/ItemFrame.java
index a86472cce8e8fcde16d761842fe443a619f6e305..b42c060a5d8d68b5773a8a5e38c59707a277d9bb 100644
--- a/src/main/java/net/minecraft/world/entity/decoration/ItemFrame.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/ItemFrame.java
@@ -287,6 +287,14 @@ public class ItemFrame extends HangingEntity {
         }
     }
 
+    // Paper start - Fix MC-123848 (spawn item frame drops above block)
+    @Nullable
+    @Override
+    public net.minecraft.world.entity.item.ItemEntity spawnAtLocation(ItemStack stack) {
+        return this.spawnAtLocation(stack, getDirection().equals(Direction.DOWN) ? -0.6F : 0.0F);
+    }
+    // Paper end
+
     private void removeFramedMap(ItemStack itemstack) {
         this.getFramedMapId().ifPresent((i) -> {
             MapItemSavedData worldmap = MapItem.getSavedData(i, this.level());
diff --git a/src/main/java/net/minecraft/world/entity/monster/Creeper.java b/src/main/java/net/minecraft/world/entity/monster/Creeper.java
index 7fe90ebc8eced53f72c7f935e40745075f02421b..fd1b5a1beea7594fa65decfdcccfa15781fc005b 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Creeper.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Creeper.java
@@ -248,7 +248,7 @@ public class Creeper extends Monster implements PowerableMob {
             this.level().playSound(player, this.getX(), this.getY(), this.getZ(), soundeffect, this.getSoundSource(), 1.0F, this.random.nextFloat() * 0.4F + 0.8F);
             if (!this.level().isClientSide) {
                 this.ignite();
-                if (!itemstack.isDamageableItem()) {
+                if (itemstack.getItem().getMaxDamage() == 0) { // Paper - fix MC-264285, only shrink the stack if the item type actually has no durability
                     itemstack.shrink(1);
                 } else {
                     itemstack.hurtAndBreak(1, player, (entityhuman1) -> {
diff --git a/src/main/java/net/minecraft/world/entity/npc/CatSpawner.java b/src/main/java/net/minecraft/world/entity/npc/CatSpawner.java
index f174094febfdfdc309f1b50877be60bae8a98156..5f407535298a31a34cfe114dd863fd6a9b977707 100644
--- a/src/main/java/net/minecraft/world/entity/npc/CatSpawner.java
+++ b/src/main/java/net/minecraft/world/entity/npc/CatSpawner.java
@@ -87,8 +87,8 @@ public class CatSpawner implements CustomSpawner {
         if (cat == null) {
             return 0;
         } else {
+            cat.moveTo(pos, 0.0F, 0.0F); // Paper - move up - Fix MC-147659
             cat.finalizeSpawn(world, world.getCurrentDifficultyAt(pos), MobSpawnType.NATURAL, (SpawnGroupData)null, (CompoundTag)null);
-            cat.moveTo(pos, 0.0F, 0.0F);
             world.addFreshEntityWithPassengers(cat);
             return 1;
         }
diff --git a/src/main/java/net/minecraft/world/entity/raid/Raids.java b/src/main/java/net/minecraft/world/entity/raid/Raids.java
index 380afb885e85e4cf80e746d217033345a7514443..41457c9f27b18fa2734a6cca297ec5186470e82f 100644
--- a/src/main/java/net/minecraft/world/entity/raid/Raids.java
+++ b/src/main/java/net/minecraft/world/entity/raid/Raids.java
@@ -125,7 +125,7 @@ public class Raids extends SavedData {
                     // CraftBukkit end
                 } else {
                     player.removeEffect(MobEffects.BAD_OMEN);
-                    player.connection.send(new ClientboundEntityEventPacket(player, (byte) 43));
+                    this.level.broadcastEntityEvent(player, net.minecraft.world.entity.EntityEvent.BAD_OMEN_TRIGGERED /* (byte) 43 */); // Paper - Fix MC-253884
                 }
 
                 if (flag) {
@@ -140,7 +140,7 @@ public class Raids extends SavedData {
                     }
                     // CraftBukkit end
                     raid.absorbBadOmen(player);
-                    player.connection.send(new ClientboundEntityEventPacket(player, (byte) 43));
+                    this.level.broadcastEntityEvent(player, net.minecraft.world.entity.EntityEvent.BAD_OMEN_TRIGGERED /* (byte) 43 */); // Paper - Fix MC-253884
                     if (!raid.hasFirstWaveSpawned()) {
                         player.awardStat(Stats.RAID_TRIGGER);
                         CriteriaTriggers.BAD_OMEN.trigger(player);
diff --git a/src/main/java/net/minecraft/world/item/SaddleItem.java b/src/main/java/net/minecraft/world/item/SaddleItem.java
index 11e8f2bf261abcb75d4dd011702c8f396e9f5be4..7234010d81078d357ab9bca422e44864a9e269bb 100644
--- a/src/main/java/net/minecraft/world/item/SaddleItem.java
+++ b/src/main/java/net/minecraft/world/item/SaddleItem.java
@@ -18,7 +18,7 @@ public class SaddleItem extends Item {
         if (entity instanceof Saddleable saddleable && entity.isAlive()) {
             if (!saddleable.isSaddled() && saddleable.isSaddleable()) {
                 if (!user.level().isClientSide) {
-                    saddleable.equipSaddle(SoundSource.NEUTRAL);
+                    saddleable.equipSaddle(SoundSource.NEUTRAL, stack.copyWithCount(1)); // Paper - Fix saddles losing nbt data - MC-191591
                     entity.level().gameEvent(entity, GameEvent.EQUIP, entity.position());
                     stack.shrink(1);
                 }
diff --git a/src/main/java/net/minecraft/world/level/block/AzaleaBlock.java b/src/main/java/net/minecraft/world/level/block/AzaleaBlock.java
index 023ed8441d629629828051b4098b09b06ce51a75..95b53450a807fccfa55b59852da52785b8cf3e3d 100644
--- a/src/main/java/net/minecraft/world/level/block/AzaleaBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/AzaleaBlock.java
@@ -45,4 +45,11 @@ public class AzaleaBlock extends BushBlock implements BonemealableBlock {
     public void performBonemeal(ServerLevel world, RandomSource random, BlockPos pos, BlockState state) {
         TREE_GROWER.growTree(world, world.getChunkSource().getGenerator(), pos, state, random);
     }
+
+    // Paper start - Fix MC-224454
+    @Override
+    public boolean isPathfindable(BlockState state, BlockGetter world, BlockPos pos, net.minecraft.world.level.pathfinder.PathComputationType type) {
+        return false;
+    }
+    // Paper end
 }
diff --git a/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java b/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java
index 2932419b7ca3f066b1db329829af36ba31e17c65..e11eced0bf15dfecaf64f5e1c28e973c38746095 100644
--- a/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/LayeredCauldronBlock.java
@@ -63,7 +63,7 @@ public class LayeredCauldronBlock extends AbstractCauldronBlock {
         if (!new io.papermc.paper.event.entity.EntityInsideBlockEvent(entity.getBukkitEntity(), org.bukkit.craftbukkit.block.CraftBlock.at(world, pos)).callEvent()) { return; } // Paper
         if (!world.isClientSide && entity.isOnFire() && this.isEntityInsideContent(state, pos, entity)) {
             // CraftBukkit start
-            if (entity.mayInteract(world, pos)) {
+            if ((entity instanceof net.minecraft.world.entity.player.Player || world.getGameRules().getBoolean(net.minecraft.world.level.GameRules.RULE_MOBGRIEFING)) && entity.mayInteract(world, pos)) { // Paper - Fixes MC-248588
                 if (!this.handleEntityOnFireInsideWithEvent(state, world, pos, entity)) { // Paper - fix powdered snow cauldron extinguishing entities
                     return;
                 }
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 436290eaa0dab05a642b67b265117dbe5eceb8b7..5ccc419b904aec590c5624438da61ca6724b20d6 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
@@ -674,13 +674,10 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
 
     @Override
     public void fillStackedContents(StackedContents finder) {
-        Iterator iterator = this.items.iterator();
-
-        while (iterator.hasNext()) {
-            ItemStack itemstack = (ItemStack) iterator.next();
-
-            finder.accountStack(itemstack);
-        }
+        // Paper start - don't account fuel stack (fixes MC-243057)
+        finder.accountStack(this.items.get(SLOT_INPUT));
+        finder.accountStack(this.items.get(SLOT_RESULT));
+        // Paper end
 
     }
 }