Fix boats/minecarts not dropping when destroyed

Diff to clone the item was lost, which meant that the spawned
item was air.

patches/server/0344-Fix-item-duplication-and-teleport-issues.patch

@@ -16,7 +16,7 @@ So even if something NEW comes up, it would be impossible to drop the
 same item twice because the source was destroyed.
 
 diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
-index 5b8e264098f1b713de15f714bae59d3efda365cf..6f1e09087cf2d8dbb61882473b220100e3b0369a 100644
+index 5b8e264098f1b713de15f714bae59d3efda365cf..d5f96ed753e8298085e40c6181285cd6ea838ca2 100644
 --- a/src/main/java/net/minecraft/world/entity/Entity.java
 +++ b/src/main/java/net/minecraft/world/entity/Entity.java
 @@ -2630,11 +2630,12 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
@@ -28,7 +28,8 @@ index 5b8e264098f1b713de15f714bae59d3efda365cf..6f1e09087cf2d8dbb61882473b220100
                  return null;
              }
              // CraftBukkit end
-             ItemEntity entityitem = new ItemEntity(world, this.getX(), this.getY() + (double) yOffset, this.getZ(), stack);
+-            ItemEntity entityitem = new ItemEntity(world, this.getX(), this.getY() + (double) yOffset, this.getZ(), stack);
++            ItemEntity entityitem = new ItemEntity(world, this.getX(), this.getY() + (double) yOffset, this.getZ(), stack.copy()); // Paper - copy so we can destroy original
 +            stack.setCount(0); // Paper - destroy this item - if this ever leaks due to game bugs, ensure it doesn't dupe
  
              entityitem.setDefaultPickUpDelay();