From deb0cee8a0467434e21afea87a776b0d9caf38d5 Mon Sep 17 00:00:00 2001
From: Nick <nick@npbe.net>
Date: Sun, 1 Nov 2020 16:49:13 +0300
Subject: [PATCH] BaseInventory::canAddItem(): consider item max stack size
 (#3881)

this fixes addItem() failing when canAddItem() reported that an item can be added.
---
 src/pocketmine/inventory/BaseInventory.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/pocketmine/inventory/BaseInventory.php b/src/pocketmine/inventory/BaseInventory.php
index f1d8bb987..cde92cc4a 100644
--- a/src/pocketmine/inventory/BaseInventory.php
+++ b/src/pocketmine/inventory/BaseInventory.php
@@ -252,11 +252,11 @@ abstract class BaseInventory implements Inventory{
 		for($i = 0, $size = $this->getSize(); $i < $size; ++$i){
 			$slot = $this->getItem($i);
 			if($item->equals($slot)){
-				if(($diff = $slot->getMaxStackSize() - $slot->getCount()) > 0){
+				if(($diff = min($slot->getMaxStackSize(), $item->getMaxStackSize()) - $slot->getCount()) > 0){
 					$count -= $diff;
 				}
 			}elseif($slot->isNull()){
-				$count -= $this->getMaxStackSize();
+				$count -= min($this->getMaxStackSize(), $item->getMaxStackSize());
 			}
 
 			if($count <= 0){