PaperMC/paper-server/nms-patches/net/minecraft/world/entity/monster/EntityShulker.patch

--- a/net/minecraft/world/entity/monster/EntityShulker.java
+++ b/net/minecraft/world/entity/monster/EntityShulker.java
@@ -47,11 +47,17 @@
 import net.minecraft.world.phys.AxisAlignedBB;
 import net.minecraft.world.phys.Vec3D;
 
+// CraftBukkit start
+import net.minecraft.server.level.WorldServer;
+import org.bukkit.Location;
+import org.bukkit.event.entity.EntityTeleportEvent;
+// CraftBukkit end
+
 public class EntityShulker extends EntityGolem implements IMonster {
 
     private static final UUID bp = UUID.fromString("7E0292F2-9434-48D5-A29F-9583AF7DF27F");
     private static final AttributeModifier bq = new AttributeModifier(EntityShulker.bp, "Covered armor bonus", 20.0D, AttributeModifier.Operation.ADDITION);
-    protected static final DataWatcherObject<EnumDirection> b = DataWatcher.a(EntityShulker.class, DataWatcherRegistry.n);
+    public static final DataWatcherObject<EnumDirection> b = DataWatcher.a(EntityShulker.class, DataWatcherRegistry.n); // PAIL protected -> public, rename ATTACH_FACE
     protected static final DataWatcherObject<Optional<BlockPosition>> c = DataWatcher.a(EntityShulker.class, DataWatcherRegistry.m);
     protected static final DataWatcherObject<Byte> d = DataWatcher.a(EntityShulker.class, DataWatcherRegistry.a);
     public static final DataWatcherObject<Byte> COLOR = DataWatcher.a(EntityShulker.class, DataWatcherRegistry.a);
@@ -71,7 +77,7 @@
         this.goalSelector.a(4, new EntityShulker.a());
         this.goalSelector.a(7, new EntityShulker.e());
         this.goalSelector.a(8, new PathfinderGoalRandomLookaround(this));
-        this.targetSelector.a(1, (new PathfinderGoalHurtByTarget(this, new Class[0])).a());
+        this.targetSelector.a(1, (new PathfinderGoalHurtByTarget(this, new Class[0])).a(new Class[0])); // CraftBukkit - decompile error
         this.targetSelector.a(2, new EntityShulker.d(this));
         this.targetSelector.a(3, new EntityShulker.c(this));
     }
@@ -319,6 +325,16 @@
                     EnumDirection enumdirection = this.g(blockposition1);
 
                     if (enumdirection != null) {
+                        // CraftBukkit start
+                        EntityTeleportEvent teleport = new EntityTeleportEvent(this.getBukkitEntity(), this.getBukkitEntity().getLocation(), new Location(this.world.getWorld(), blockposition1.getX(), blockposition1.getY(), blockposition1.getZ()));
+                        this.world.getServer().getPluginManager().callEvent(teleport);
+                        if (!teleport.isCancelled()) {
+                            Location to = teleport.getTo();
+                            blockposition1 = new BlockPosition(to.getX(), to.getY(), to.getZ());
+                        } else {
+                            return false;
+                        }
+                        // CraftBukkit end
                         this.datawatcher.set(EntityShulker.b, enumdirection);
                         this.playSound(SoundEffects.ENTITY_SHULKER_TELEPORT, 1.0F, 1.0F);
                         this.datawatcher.set(EntityShulker.c, Optional.of(blockposition1));
@@ -359,6 +375,7 @@
                 }
 
                 this.g((double) blockposition.getX() + 0.5D, (double) blockposition.getY(), (double) blockposition.getZ() + 0.5D);
+                if (valid) ((WorldServer) world).chunkCheck(this); // CraftBukkit
             }
         }