mirror of https://github.com/PaperMC/Paper.git
109 lines
7.2 KiB
Diff
109 lines
7.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jake Potrebic <jake.m.potrebic@gmail.com>
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Date: Sat, 29 Oct 2022 17:02:42 -0700
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Subject: [PATCH] Fix possible StackOverflowError for some dispenses
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For saddles, carpets, horse armor, and chests for horse-likes
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a BlockDispenseEvent handler that always mutated the item without
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changing the type would result in a SO error because when it went
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to find the replacement dispense behavior (since the item "changed")
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it didn't properly handle if the replacement was the same instance
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of dispense behavior.
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Additionally equippable mob heads, wither skulls, and carved pumpkins
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are subject to the same possible error.
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diff --git a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
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index 4fa838bf97ede6e1c893ba64f53aa7af5db0405a..32084df594649d8da04052bbfa111896d8ea1f91 100644
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--- a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
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+++ b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
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@@ -238,7 +238,7 @@ public interface DispenseItemBehavior {
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// Chain to handler for new item
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ItemStack eventStack = CraftItemStack.asNMSCopy(event.getItem());
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DispenseItemBehavior idispensebehavior = (DispenseItemBehavior) DispenserBlock.DISPENSER_REGISTRY.get(eventStack.getItem());
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- if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != ArmorItem.DISPENSE_ITEM_BEHAVIOR) {
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+ if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != this) { // Paper - fix possible StackOverflowError
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idispensebehavior.dispense(pointer, eventStack);
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return stack;
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}
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@@ -294,7 +294,7 @@ public interface DispenseItemBehavior {
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// Chain to handler for new item
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ItemStack eventStack = CraftItemStack.asNMSCopy(event.getItem());
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DispenseItemBehavior idispensebehavior = (DispenseItemBehavior) DispenserBlock.DISPENSER_REGISTRY.get(eventStack.getItem());
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- if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != ArmorItem.DISPENSE_ITEM_BEHAVIOR) {
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+ if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != this) { // Paper - fix possible StackOverflowError
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idispensebehavior.dispense(pointer, eventStack);
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return stack;
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}
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@@ -368,7 +368,7 @@ public interface DispenseItemBehavior {
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// Chain to handler for new item
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ItemStack eventStack = CraftItemStack.asNMSCopy(event.getItem());
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DispenseItemBehavior idispensebehavior = (DispenseItemBehavior) DispenserBlock.DISPENSER_REGISTRY.get(eventStack.getItem());
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- if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != ArmorItem.DISPENSE_ITEM_BEHAVIOR) {
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+ if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != this) { // Paper - fix possible StackOverflowError
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idispensebehavior.dispense(pointer, eventStack);
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return stack;
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}
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@@ -710,7 +710,7 @@ public interface DispenseItemBehavior {
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OptionalDispenseItemBehavior dispensebehaviormaybe1 = new OptionalDispenseItemBehavior() {
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@Override
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protected ItemStack execute(BlockSource pointer, ItemStack stack) {
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- this.setSuccess(ArmorItem.dispenseArmor(pointer, stack));
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+ this.setSuccess(ArmorItem.dispenseArmor(pointer, stack, this)); // Paper - fix possible StackOverflowError
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return stack;
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}
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};
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@@ -764,7 +764,7 @@ public interface DispenseItemBehavior {
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stack.shrink(1);
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this.setSuccess(true);
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} else {
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- this.setSuccess(ArmorItem.dispenseArmor(pointer, stack));
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+ this.setSuccess(ArmorItem.dispenseArmor(pointer, stack, this)); // Paper - fix possible StackOverflowError
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}
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return stack;
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@@ -810,7 +810,7 @@ public interface DispenseItemBehavior {
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stack.shrink(1);
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this.setSuccess(true);
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} else {
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- this.setSuccess(ArmorItem.dispenseArmor(pointer, stack));
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+ this.setSuccess(ArmorItem.dispenseArmor(pointer, stack, this)); // Paper - fix possible StackOverflowError
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}
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return stack;
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diff --git a/src/main/java/net/minecraft/world/item/ArmorItem.java b/src/main/java/net/minecraft/world/item/ArmorItem.java
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index e766397aae3f73548b290b0809b9d1ca0967ea39..786e4a8700cb84b16dd9b8892a0d1d5803924d81 100644
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--- a/src/main/java/net/minecraft/world/item/ArmorItem.java
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+++ b/src/main/java/net/minecraft/world/item/ArmorItem.java
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@@ -48,14 +48,20 @@ public class ArmorItem extends Item implements Equipable {
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public static final DispenseItemBehavior DISPENSE_ITEM_BEHAVIOR = new DefaultDispenseItemBehavior() {
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@Override
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protected ItemStack execute(BlockSource pointer, ItemStack stack) {
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- return ArmorItem.dispenseArmor(pointer, stack) ? stack : super.execute(pointer, stack);
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+ return ArmorItem.dispenseArmor(pointer, stack, this) ? stack : super.execute(pointer, stack); // Paper - fix possible StackOverflowError
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}
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};
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protected final ArmorItem.Type type;
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protected final Holder<ArmorMaterial> material;
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private final Supplier<ItemAttributeModifiers> defaultModifiers;
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+ @Deprecated @io.papermc.paper.annotation.DoNotUse // Paper
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public static boolean dispenseArmor(BlockSource pointer, ItemStack armor) {
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+ // Paper start
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+ return dispenseArmor(pointer, armor, null);
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+ }
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+ public static boolean dispenseArmor(BlockSource pointer, ItemStack armor, @javax.annotation.Nullable DispenseItemBehavior currentBehavior) {
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+ // Paper end
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BlockPos blockposition = pointer.pos().relative((Direction) pointer.state().getValue(DispenserBlock.FACING));
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List<LivingEntity> list = pointer.level().getEntitiesOfClass(LivingEntity.class, new AABB(blockposition), EntitySelector.NO_SPECTATORS.and(new EntitySelector.MobCanWearArmorEntitySelector(armor)));
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@@ -86,7 +92,7 @@ public class ArmorItem extends Item implements Equipable {
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// Chain to handler for new item
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ItemStack eventStack = CraftItemStack.asNMSCopy(event.getItem());
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DispenseItemBehavior idispensebehavior = (DispenseItemBehavior) DispenserBlock.DISPENSER_REGISTRY.get(eventStack.getItem());
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- if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != ArmorItem.DISPENSE_ITEM_BEHAVIOR) {
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+ if (idispensebehavior != DispenseItemBehavior.NOOP && (currentBehavior == null || idispensebehavior != currentBehavior)) { // Paper - fix possible StackOverflowError
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idispensebehavior.dispense(pointer, eventStack);
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return true;
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}
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