From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Nassim Jahnke <nassim@njahnke.dev>
Date: Sat, 18 Mar 2023 18:51:33 +0100
Subject: [PATCH] Fix chiseled bookshelf setItem with air


diff --git a/src/main/java/net/minecraft/world/level/block/entity/ChiseledBookShelfBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/ChiseledBookShelfBlockEntity.java
index 6986b2a5df34bfe078c902594f6409ad0ea847ef..ed12a23448dc9ada423ebd79a131eab2de3d6e48 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/ChiseledBookShelfBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/ChiseledBookShelfBlockEntity.java
@@ -146,7 +146,7 @@ public class ChiseledBookShelfBlockEntity extends BlockEntity implements Contain
 
     @Override
     public void setItem(int slot, ItemStack stack) {
-        if (stack.is(ItemTags.BOOKSHELF_BOOKS)) {
+        if (stack.isEmpty() || stack.is(ItemTags.BOOKSHELF_BOOKS)) { // Paper
             this.items.set(slot, stack);
             this.updateState(slot);
         }