Minor fixes and performance improvement

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/PlayerEvents.java

@@ -2211,12 +2211,12 @@ import java.util.regex.Pattern;
                 }
                 break;
             }
-            case LEFT_CLICK_BLOCK:
+//            case LEFT_CLICK_BLOCK:
-                Block block = event.getClickedBlock();
+//                Block block = event.getClickedBlock();
-                location = BukkitUtil.getLocation(block.getLocation());
+//                location = BukkitUtil.getLocation(block.getLocation());
-                eventType = PlayerBlockEventType.BREAK_BLOCK;
+//                eventType = PlayerBlockEventType.BREAK_BLOCK;
-                lazyItem = BukkitBlockUtil.supplyItem(block);
+//                lazyItem = BukkitBlockUtil.supplyItem(block);
-                break;
+//                break;
             default:
                 return;
         }

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/object/BukkitBlockUtil.java

@@ -10,7 +10,11 @@ import java.util.function.Supplier;
 
 public class BukkitBlockUtil {
     public static Supplier<ItemType> supplyItem(Block block) {
-        return () -> BukkitAdapter.asItemType(block.getType());
+        return new Supplier<ItemType>() {
+            @Override public ItemType get() {
+                return BukkitAdapter.asItemType(block.getType());
+            }
+        };
     }
 
     public static Supplier<ItemType> supplyItem(Material type) {

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/util/BukkitChunkManager.java

@@ -40,9 +40,12 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
+import java.util.Objects;
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+
 public class BukkitChunkManager extends ChunkManager {
 
     public static boolean isIn(CuboidRegion region, int x, int z) {
@@ -111,7 +114,7 @@ public class BukkitChunkManager extends ChunkManager {
 
     @Override public Set<BlockVector2> getChunkChunks(String world) {
         Set<BlockVector2> chunks = super.getChunkChunks(world);
-        for (Chunk chunk : Bukkit.getWorld(world).getLoadedChunks()) {
+        for (Chunk chunk : Objects.requireNonNull(Bukkit.getWorld(world)).getLoadedChunks()) {
             BlockVector2 loc = BlockVector2.at(chunk.getX() >> 5, chunk.getZ() >> 5);
             chunks.add(loc);
         }
@@ -269,6 +272,7 @@ public class BukkitChunkManager extends ChunkManager {
             }
         }
         final World worldObj = Bukkit.getWorld(world);
+        checkNotNull(worldObj, "Critical error during regeneration.");
         final BukkitWorld bukkitWorldObj = new BukkitWorld(worldObj);
         TaskManager.runTask(new Runnable() {
             @Override public void run() {
@@ -398,7 +402,7 @@ public class BukkitChunkManager extends ChunkManager {
         return true;
     }
 
-    @Override public CompletableFuture loadChunk(String world, BlockVector2 chunkLoc, boolean force) {
+    @Override public CompletableFuture<?> loadChunk(String world, BlockVector2 chunkLoc, boolean force) {
         return PaperLib.getChunkAtAsync(BukkitUtil.getWorld(world),chunkLoc.getX(), chunkLoc.getZ(), force);
     }
 
@@ -440,8 +444,9 @@ public class BukkitChunkManager extends ChunkManager {
         CuboidRegion region2 =
             RegionUtil.createRegion(bot2.getX(), top2.getX(), bot2.getZ(), top2.getZ());
         final World world1 = Bukkit.getWorld(bot1.getWorld());
-        World world2 = Bukkit.getWorld(bot2.getWorld());
+        final World world2 = Bukkit.getWorld(bot2.getWorld());
-
+        checkNotNull(world1,"Critical error during swap.");
+        checkNotNull(world2,"Critical error during swap.");
         int relX = bot2.getX() - bot1.getX();
         int relZ = bot2.getZ() - bot1.getZ();
 

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/util/BukkitCommand.java

@@ -48,12 +48,12 @@ public class BukkitCommand implements CommandExecutor, TabCompleter {
         if (args.length == 0) {
             return Collections.singletonList("plots");
         }
-        Collection objects = MainCommand.getInstance().tab(player, args, s.endsWith(" "));
+        Collection<com.github.intellectualsites.plotsquared.commands.Command> objects = MainCommand.getInstance().tab(player, args, s.endsWith(" "));
         if (objects == null) {
             return null;
         }
         List<String> result = new ArrayList<>();
-        for (Object o : objects) {
+        for (com.github.intellectualsites.plotsquared.commands.Command o : objects) {
             result.add(o.toString());
         }
         return result.isEmpty() ? null : result;

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/util/BukkitInventoryUtil.java

@@ -96,6 +96,7 @@ public class BukkitInventoryUtil extends InventoryUtil {
       }
       if (meta.hasLore()) {
         List<String> itemLore = meta.getLore();
+        assert itemLore != null;
         lore = itemLore.toArray(new String[0]);
       }
     }

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Auto.java

@@ -174,10 +174,16 @@ public class Auto extends SubCommand {
             if (Permissions.hasPermission(player, Captions.PERMISSION_AUTO_MEGA)) {
                 try {
                     String[] split = args[0].split(",|;");
-                    size_x = Integer.parseInt(split[0]);
+                    if (split[1] == null) {
-                    size_z = Integer.parseInt(split[1]);
+                        MainUtil.sendMessage(player,"Correct use /plot auto [length,width]");
+                        size_x = 1;
+                        size_z = 1;
+                    } else {
+                        size_x = Integer.parseInt(split[0]);
+                        size_z = Integer.parseInt(split[1]);
+                    }
                     if (size_x < 1 || size_z < 1) {
-                        MainUtil.sendMessage(player, "&cError: size<=0");
+                        MainUtil.sendMessage(player, "Error: size<=0");
                     }
                     if (args.length > 1) {
                         schematic = args[1];