fix bsi creation on wrong thread, cache chunks, fixes #210

src/launch/java/baritone/launch/mixins/MixinChunkProviderClient.java

@@ -0,0 +1,39 @@
+/*
+ * 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.launch.mixins;
+
+import baritone.utils.accessor.IChunkProviderClient;
+import it.unimi.dsi.fastutil.longs.Long2ObjectMap;
+import net.minecraft.client.multiplayer.ChunkProviderClient;
+import net.minecraft.world.chunk.Chunk;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(ChunkProviderClient.class)
+public class MixinChunkProviderClient implements IChunkProviderClient {
+
+    @Shadow
+    @Final
+    private Long2ObjectMap<Chunk> loadedChunks;
+
+    @Override
+    public Long2ObjectMap<Chunk> loadedChunks() {
+        return this.loadedChunks;
+    }
+}

src/launch/resources/mixins.baritone.json

@@ -10,6 +10,7 @@
   "client": [
     "MixinAnvilChunkLoader",
     "MixinBlockPos",
+    "MixinChunkProviderClient",
     "MixinChunkProviderServer",
     "MixinEntity",
     "MixinEntityLivingBase",