From 2fd7964587a3fb8c9b11883eb73f69c41a69d647 Mon Sep 17 00:00:00 2001
From: md_5 <git@md-5.net>
Date: Mon, 6 Jan 2020 12:12:34 +1100
Subject: [PATCH] SPIGOT-5500: Lectern cannot be replaced using /setblock and
 other commands

---
 nms-patches/BlockLectern.patch | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 nms-patches/BlockLectern.patch

diff --git a/nms-patches/BlockLectern.patch b/nms-patches/BlockLectern.patch
new file mode 100644
index 0000000000..81c3a26947
--- /dev/null
+++ b/nms-patches/BlockLectern.patch
@@ -0,0 +1,17 @@
+--- a/net/minecraft/server/BlockLectern.java
++++ b/net/minecraft/server/BlockLectern.java
+@@ -151,12 +151,13 @@
+     }
+ 
+     private void d(IBlockData iblockdata, World world, BlockPosition blockposition) {
+-        TileEntity tileentity = world.getTileEntity(blockposition);
++        TileEntity tileentity = world.getTileEntity(blockposition, false); // CraftBukkit - don't validate, type may be changed already
+ 
+         if (tileentity instanceof TileEntityLectern) {
+             TileEntityLectern tileentitylectern = (TileEntityLectern) tileentity;
+             EnumDirection enumdirection = (EnumDirection) iblockdata.get(BlockLectern.a);
+             ItemStack itemstack = tileentitylectern.getBook().cloneItemStack();
++            if (itemstack.isEmpty()) return; // CraftBukkit - SPIGOT-5500
+             float f = 0.25F * (float) enumdirection.getAdjacentX();
+             float f1 = 0.25F * (float) enumdirection.getAdjacentZ();
+             EntityItem entityitem = new EntityItem(world, (double) blockposition.getX() + 0.5D + (double) f, (double) (blockposition.getY() + 1), (double) blockposition.getZ() + 0.5D + (double) f1, itemstack);