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Call LivingEntity#onItemPickup before mutation (#9948)

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The existing EntityPickupItemEvent fixes patch moves the call to LivingEntity#onItemPickup for piglins after the respective EntityPickupItemEvent calls, which is correct.
However the patch moved the call so far down the line that the existing logic already mutated the picked up item entity, leading to faulty state being passed to the onItemPickup method.

To prevent logic in LivingEntity#onItemPickup to read from an ItemEntity that was already mutated, this commit moves the calls prior to the two respective mutations (either gold_nugget or rest).

This was chosen above taking a copy of the original item and restoring state later on to avoid a full item stack clone.
This commit is contained in:
Bjarne Koll 2023-11-17 07:43:25 +01:00
parent 95c2b76467
commit 8b711f86a3
1 changed files with 5 additions and 7 deletions
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12
patches/server/EntityPickupItemEvent-fixes.patch
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@ -36,18 +36,16 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+ // Paper start - fix event firing twice
+ if (drop.getItem().is(Items.GOLD_NUGGET) /* && !org.bukkit.craftbukkit.event.CraftEventFactory.callEntityPickupItemEvent(piglin, drop, 0, false).isCancelled() */) {
+ if (org.bukkit.craftbukkit.event.CraftEventFactory.callEntityPickupItemEvent(piglin, drop, 0, false).isCancelled()) return;
+ piglin.onItemPickup(drop); // Paper - moved from Piglin#pickUpItem - call prior to item entity modification
+ // Paper end
piglin.take(drop, drop.getItem().getCount());
itemstack = drop.getItem();
drop.discard();
@@ -0,0 +0,0 @@ public class PiglinAi {
} else if (!org.bukkit.craftbukkit.event.CraftEventFactory.callEntityPickupItemEvent(piglin, drop, drop.getItem().getCount() - 1, false).isCancelled()) {
+ piglin.onItemPickup(drop); // Paper - moved from Piglin#pickUpItem - call prior to item entity modification
piglin.take(drop, 1);
itemstack = PiglinAi.removeOneItemFromItemEntity(drop);
} else {
return;
}
+ piglin.onItemPickup(drop); // Paper - moved from Piglin#pickUpItem
// CraftBukkit end
if (PiglinAi.isLovedItem(itemstack, piglin)) { // CraftBukkit - Changes to allow for custom payment in bartering
diff --git a/src/main/java/net/minecraft/world/entity/raid/Raider.java b/src/main/java/net/minecraft/world/entity/raid/Raider.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/raid/Raider.java