PaperMC/patches/server/0346-Fix-spawning-of-hanging-entities-that-are-not-ItemFr.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: MisterErwin <git@askarian.net>
Date: Wed, 30 Oct 2019 16:57:54 +0100
Subject: [PATCH] Fix spawning of hanging entities that are not ItemFrames and
 can not face UP or DOWN


diff --git a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
index aea3fafb093814bfb1e010aa70d138eecc07af93..def6668424af23ad3a16fa726919f7c06ec20295 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
@@ -816,7 +816,12 @@ public abstract class CraftRegionAccessor implements RegionAccessor {
                 height = 9;
             }
 
-            BlockFace[] faces = new BlockFace[]{BlockFace.EAST, BlockFace.NORTH, BlockFace.WEST, BlockFace.SOUTH, BlockFace.UP, BlockFace.DOWN};
+            // Paper start - In addition to d65a2576e40e58c8e446b330febe6799d13a604f do not check UP/DOWN for non item frames
+            // BlockFace[] faces = new BlockFace[]{BlockFace.EAST, BlockFace.NORTH, BlockFace.WEST, BlockFace.SOUTH, BlockFace.UP, BlockFace.DOWN};
+            BlockFace[] faces = (ItemFrame.class.isAssignableFrom(clazz))
+                ? new BlockFace[]{BlockFace.EAST, BlockFace.NORTH, BlockFace.WEST, BlockFace.SOUTH, BlockFace.UP, BlockFace.DOWN}
+                : new BlockFace[]{BlockFace.EAST, BlockFace.NORTH, BlockFace.WEST, BlockFace.SOUTH};
+            // Paper end
             final BlockPos pos = new BlockPos(x, y, z);
             for (BlockFace dir : faces) {
                 net.minecraft.world.level.block.state.BlockState nmsBlock = this.getHandle().getBlockState(pos.relative(CraftBlock.blockFaceToNotch(dir)));