SPIGOT-6115: Items being deleted on pick up with full inventory

nms-patches/EntityItem.patch

@@ -85,7 +85,7 @@
              this.velocityChanged();
              this.f = (int) ((float) this.f - f);
              if (this.f <= 0) {
-@@ -285,6 +307,45 @@
+@@ -285,6 +307,46 @@
              Item item = itemstack.getItem();
              int i = itemstack.getCount();
  
@@ -113,12 +113,13 @@
 +                    return;
 +                }
 +
-+                // Update the ItemStack incase it was changed in the event
-+                itemstack = this.getItemStack();
-+                canHold = entityhuman.inventory.canHold(itemstack);
-+                remaining = itemstack.getCount() - canHold;
-+
-+                itemstack.setCount(canHold + remaining); // = i
++                // Update the ItemStack if it was changed in the event
++                ItemStack current = this.getItemStack();
++                if (!itemstack.equals(current)) {
++                    itemstack = current;
++                } else {
++                    itemstack.setCount(canHold + remaining); // = i
++                }
 +
 +                // Possibly < 0; fix here so we do not have to modify code below
 +                this.pickupDelay = 0;
@@ -131,7 +132,7 @@
              if (this.pickupDelay == 0 && (this.owner == null || this.owner.equals(entityhuman.getUniqueID())) && entityhuman.inventory.pickup(itemstack)) {
                  entityhuman.receive(this, i);
                  if (itemstack.isEmpty()) {
-@@ -328,7 +389,9 @@
+@@ -328,7 +390,9 @@
      }
  
      public void setItemStack(ItemStack itemstack) {