From 41b8754130f0dd04a7e2d4291727f3b743b4ffc0 Mon Sep 17 00:00:00 2001
From: yueh <yueh@orod.de>
Date: Mon, 17 Oct 2016 12:31:55 +0200
Subject: [PATCH] Fixes #2484: Return a copied itemstack to prevent forge from
 consuming it.

---
 .../appeng/items/tools/quartz/ToolQuartzCuttingKnife.java   | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/main/java/appeng/items/tools/quartz/ToolQuartzCuttingKnife.java b/src/main/java/appeng/items/tools/quartz/ToolQuartzCuttingKnife.java
index 2a08edae..80c9023f 100644
--- a/src/main/java/appeng/items/tools/quartz/ToolQuartzCuttingKnife.java
+++ b/src/main/java/appeng/items/tools/quartz/ToolQuartzCuttingKnife.java
@@ -85,8 +85,10 @@ public class ToolQuartzCuttingKnife extends AEBaseItem implements IGuiItem
 	@Override
 	public ItemStack getContainerItem( final ItemStack itemStack )
 	{
-		itemStack.setItemDamage( itemStack.getItemDamage() + 1 );
-		return itemStack;
+		ItemStack copy = itemStack.copy();
+		copy.setItemDamage( itemStack.getItemDamage() + 1 );
+
+		return copy;
 	}
 
 	@Override