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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sat, 24 Jun 2023 09:42:53 -0700
Subject: [PATCH] Fix possible NPE on painting creation


diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
index 08316493785e0cf1f93f07dda8016ca5956216f8..a97ceea235f756cbca3c82aa1965d90cf7767580 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
@@ -318,8 +318,13 @@ public final class CraftEntityTypes {
         // Hanging
         register(new EntityTypeData<>(EntityType.PAINTING, Painting.class, CraftPainting::new, createHanging(Painting.class, (spawnData, hangingData) -> {
                     if (spawnData.normalWorld && hangingData.randomize()) {
-                        return net.minecraft.world.entity.decoration.Painting.create(spawnData.minecraftWorld(), hangingData.position(), hangingData.direction()).orElse(null);
-                    } else {
+                        // Paper start - if randomizeData fails, force it
+                        final net.minecraft.world.entity.decoration.Painting entity = net.minecraft.world.entity.decoration.Painting.create(spawnData.minecraftWorld(), hangingData.position(), hangingData.direction()).orElse(null);
+                        if (entity != null) {
+                            return entity;
+                        }
+                    } /*else*/ {
+                        // Paper end - if randomizeData fails, force it
                         net.minecraft.world.entity.decoration.Painting entity = new net.minecraft.world.entity.decoration.Painting(net.minecraft.world.entity.EntityType.PAINTING, spawnData.minecraftWorld());
                         entity.absMoveTo(spawnData.x(), spawnData.y(), spawnData.z(), spawnData.yaw(), spawnData.pitch());
                         entity.setDirection(hangingData.direction());
@@ -457,6 +462,7 @@ public final class CraftEntityTypes {
                     AABB bb = (ItemFrame.class.isAssignableFrom(clazz))
                             ? net.minecraft.world.entity.decoration.ItemFrame.calculateBoundingBox(null, pos, CraftBlock.blockFaceToNotch(dir).getOpposite(), width, height)
                             : HangingEntity.calculateBoundingBox(null, pos, CraftBlock.blockFaceToNotch(dir).getOpposite(), width, height);
+                    if (!spawnData.world.noCollision(bb)) continue; // Paper - add collision check
                     List<net.minecraft.world.entity.Entity> list = spawnData.world().getEntities(null, bb);
                     for (Iterator<net.minecraft.world.entity.Entity> it = list.iterator(); !taken && it.hasNext(); ) {
                         net.minecraft.world.entity.Entity e = it.next();