Paper/patch-remap/mache-spigotflower-stripped/net/minecraft/core/dispenser/BoatDispenseItemBehavior.java.patch

--- a/net/minecraft/core/dispenser/BoatDispenseItemBehavior.java
+++ b/net/minecraft/core/dispenser/BoatDispenseItemBehavior.java
@@ -12,6 +12,11 @@
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.block.DispenserBlock;
 import net.minecraft.world.phys.Vec3;
+// CraftBukkit start
+import org.bukkit.craftbukkit.block.CraftBlock;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.event.block.BlockDispenseEvent;
+// CraftBukkit end
 
 public class BoatDispenseItemBehavior extends DefaultDispenseItemBehavior {
 
@@ -52,13 +56,41 @@
             d4 = 0.0D;
         }
 
-        Object object = this.isChestBoat ? new ChestBoat(serverlevel, d1, d2 + d4, d3) : new Boat(serverlevel, d1, d2 + d4, d3);
+        // Object object = this.isChestBoat ? new ChestBoat(worldserver, d1, d2 + d4, d3) : new EntityBoat(worldserver, d1, d2 + d4, d3);
+        // CraftBukkit start
+        ItemStack itemstack1 = itemstack.split(1);
+        org.bukkit.block.Block block = CraftBlock.at(worldserver, sourceblock.pos());
+        CraftItemStack craftItem = CraftItemStack.asCraftMirror(itemstack1);
 
-        EntityType.createDefaultStackConfig(serverlevel, itemstack, (Player) null).accept(object);
+        BlockDispenseEvent event = new BlockDispenseEvent(block, craftItem.clone(), new org.bukkit.util.Vector(d1, d2 + d4, d3));
+        if (!DispenserBlock.eventFired) {
+            worldserver.getCraftServer().getPluginManager().callEvent(event);
+        }
+
+        if (event.isCancelled()) {
+            itemstack.grow(1);
+            return itemstack;
+        }
+
+        if (!event.getItem().equals(craftItem)) {
+            itemstack.grow(1);
+            // Chain to handler for new item
+            ItemStack eventStack = CraftItemStack.asNMSCopy(event.getItem());
+            DispenseItemBehavior idispensebehavior = (DispenseItemBehavior) DispenserBlock.DISPENSER_REGISTRY.get(eventStack.getItem());
+            if (idispensebehavior != DispenseItemBehavior.NOOP && idispensebehavior != this) {
+                idispensebehavior.dispense(sourceblock, eventStack);
+                return itemstack;
+            }
+        }
+
+        Boat object = this.isChestBoat ? new ChestBoat(worldserver, event.getVelocity().getX(), event.getVelocity().getY(), event.getVelocity().getZ()) : new Boat(worldserver, event.getVelocity().getX(), event.getVelocity().getY(), event.getVelocity().getZ());
+        // CraftBukkit end
+
+        EntityType.createDefaultStackConfig(worldserver, itemstack, (Player) null).accept(object);
         ((Boat) object).setVariant(this.type);
-        ((Boat) object).setYRot(direction.toYRot());
-        serverlevel.addFreshEntity((Entity) object);
-        itemstack.shrink(1);
+        ((Boat) object).setYRot(enumdirection.toYRot());
+        if (!worldserver.addFreshEntity((Entity) object)) itemstack.grow(1); // CraftBukkit
+        // itemstack.shrink(1); // CraftBukkit - handled during event processing
         return itemstack;
     }