could this be the worst possible way to copy a chunk array

src/main/java/baritone/event/GameEventHandler.java

@@ -51,6 +51,7 @@ public final class GameEventHandler implements IEventBus, Helper {
             try {
                 baritone.bsi = new BlockStateInterface(baritone.getPlayerContext(), true);
             } catch (Exception ex) {
+                ex.printStackTrace();
                 baritone.bsi = null;
             }
         } else {

src/main/java/baritone/utils/BlockStateInterface.java

@@ -21,6 +21,7 @@ import baritone.Baritone;
 import baritone.api.utils.IPlayerContext;
 import baritone.cache.CachedRegion;
 import baritone.cache.WorldData;
+import baritone.utils.accessor.IClientChunkProvider;
 import net.minecraft.block.Block;
 import net.minecraft.block.BlockState;
 import net.minecraft.block.Blocks;
@@ -59,9 +60,10 @@ public class BlockStateInterface {
 
     public BlockStateInterface(World world, WorldData worldData, boolean copyLoadedChunks) {
         this.worldData = worldData;
-        this.provider = (ClientChunkProvider) world.getChunkProvider();
-        if (copyLoadedChunks) { // todo
-            System.out.println("Really gotta do this");
+        if (copyLoadedChunks) {
+            this.provider = ((IClientChunkProvider) world.getChunkProvider()).createThreadSafeCopy();
+        } else {
+            this.provider = (ClientChunkProvider) world.getChunkProvider();
         }
         this.useTheRealWorld = !Baritone.settings().pathThroughCachedOnly.value;
         if (!Minecraft.getInstance().isOnExecutionThread()) {

src/main/java/baritone/utils/accessor/IChunkArray.java

@@ -0,0 +1,34 @@
+/*
+ * This file is part of Baritone.
+ *
+ * Baritone is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Baritone is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Baritone.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package baritone.utils.accessor;
+
+import net.minecraft.world.chunk.Chunk;
+
+import java.util.concurrent.atomic.AtomicReferenceArray;
+
+public interface IChunkArray {
+    void copyFrom(IChunkArray other);
+
+    AtomicReferenceArray<Chunk> getChunks();
+
+    int centerX();
+
+    int centerZ();
+
+    int viewDistance();
+}

src/main/java/baritone/utils/accessor/IClientChunkProvider.java

@@ -0,0 +1,26 @@
+/*
+ * This file is part of Baritone.
+ *
+ * Baritone is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Baritone is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Baritone.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package baritone.utils.accessor;
+
+import net.minecraft.client.multiplayer.ClientChunkProvider;
+
+public interface IClientChunkProvider {
+    ClientChunkProvider createThreadSafeCopy();
+
+    IChunkArray extractReferenceArray();
+}