Clean-up some misc. parts of the code

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java

@@ -413,6 +413,8 @@ public class BukkitWorld extends AbstractWorld {
         getWorld().getBlockAt(pt.getBlockX(), pt.getBlockY(), pt.getBlockZ()).breakNaturally();
     }
 
+    private static volatile boolean hasWarnedImplError = false;
+
     @Override
     public com.sk89q.worldedit.world.block.BlockState getBlock(BlockVector3 position) {
         BukkitImplAdapter adapter = WorldEditPlugin.getInstance().getBukkitImplAdapter();
@@ -420,13 +422,14 @@ public class BukkitWorld extends AbstractWorld {
             try {
                 return adapter.getBlock(BukkitAdapter.adapt(getWorld(), position)).toImmutableState();
             } catch (Exception e) {
-                Block bukkitBlock = getWorld().getBlockAt(position.getBlockX(), position.getBlockY(), position.getBlockZ());
-                return BukkitAdapter.adapt(bukkitBlock.getBlockData());
+                if (!hasWarnedImplError) {
+                    hasWarnedImplError = true;
+                    logger.warn("Unable to retrieve block via impl adapter", e);
+                }
             }
-        } else {
-            Block bukkitBlock = getWorld().getBlockAt(position.getBlockX(), position.getBlockY(), position.getBlockZ());
-            return BukkitAdapter.adapt(bukkitBlock.getBlockData());
         }
+        Block bukkitBlock = getWorld().getBlockAt(position.getBlockX(), position.getBlockY(), position.getBlockZ());
+        return BukkitAdapter.adapt(bukkitBlock.getBlockData());
     }
 
     @Override

worldedit-core/src/main/java/com/sk89q/worldedit/world/block/BlockState.java

@@ -65,7 +65,7 @@ public class BlockState implements BlockStateHolder<BlockState> {
         this.values = new LinkedHashMap<>();
         this.emptyBaseBlock = new BaseBlock(this);
     }
-    
+
     BlockState initializeId(BlockRegistry registry) {
         this.internalId = registry.getInternalBlockStateId(this);
         return this;

worldedit-core/src/main/java/com/sk89q/worldedit/world/registry/BlockRegistry.java

@@ -73,5 +73,6 @@ public interface BlockRegistry {
      * @param id The internal ID
      * @return the block state, if available
      */
+    @Nullable
     BlockState getBlockStateByInternalId(int id);
 }

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/ForgeAdapter.java

@@ -19,8 +19,6 @@
 
 package com.sk89q.worldedit.forge;
 
-import static com.google.common.base.Preconditions.checkNotNull;
-
 import com.google.common.collect.ImmutableList;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.jnbt.Tag;
@@ -63,6 +61,8 @@ import java.util.Map;
 import java.util.TreeMap;
 import java.util.stream.Collectors;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+
 public final class ForgeAdapter {
 
     private ForgeAdapter() {

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/ForgeBlockRegistry.java

@@ -27,8 +27,11 @@ import com.sk89q.worldedit.world.registry.BundledBlockRegistry;
 import net.minecraft.block.Block;
 import net.minecraft.block.material.Material;
 import net.minecraft.block.state.IBlockState;
+import net.minecraft.init.Blocks;
 import net.minecraft.state.IProperty;
+import net.minecraftforge.fml.common.registry.GameRegistry;
 import net.minecraftforge.fml.loading.FMLLoader;
+import net.minecraftforge.registries.GameData;
 
 import java.util.Collection;
 import java.util.HashMap;
@@ -40,6 +43,7 @@ import javax.annotation.Nullable;
 
 public class ForgeBlockRegistry extends BundledBlockRegistry {
 
+    private final int airId = Block.getStateId(Blocks.AIR.getDefaultState());
     private Map<Material, ForgeBlockMaterial> materialMap = new HashMap<>();
 
     @Nullable
@@ -82,4 +86,13 @@ public class ForgeBlockRegistry extends BundledBlockRegistry {
         return OptionalInt.of(Block.getStateId(equivalent));
     }
 
+    @Override
+    public BlockState getBlockStateByInternalId(int id) {
+        IBlockState equivalent = Block.getStateById(id);
+        if (equivalent.equals(Blocks.AIR.getDefaultState()) && id != airId) {
+            // We didn't find a match.
+            return null;
+        }
+        return ForgeAdapter.adapt(equivalent);
+    }
 }

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/ForgeWorldEdit.java

@@ -175,9 +175,6 @@ public class ForgeWorldEdit {
                 ItemCategory.REGISTRY.register(name.toString(), new ItemCategory(name.toString()));
             }
         }
-
-        config = new ForgeConfiguration(this);
-        config.load();
     }
 
     @SubscribeEvent
@@ -211,7 +208,7 @@ public class ForgeWorldEdit {
             InternalPacketHandler.getHandler().sendToServer(new LeftClickAirEventMessage());
             return;
         }
-        
+
         boolean isLeftDeny = event instanceof PlayerInteractEvent.LeftClickBlock
                 && ((PlayerInteractEvent.LeftClickBlock) event)
                         .getUseItem() == Event.Result.DENY;