Fixed regen

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

@@ -192,7 +192,7 @@ public class BukkitWorld extends AbstractWorld {
     public boolean regenerate(Region region, EditSession editSession) {
         BukkitImplAdapter adapter = WorldEditPlugin.getInstance().getBukkitImplAdapter();
         if (adapter != null) {
-            return adapter.regenerate(this, region, editSession);
+            return adapter.regenerate(getWorld(), region, editSession);
         }
         /*
         BaseBlock[] history = new BaseBlock[16 * 16 * (getMaxY() + 1)];

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/BukkitImplAdapter.java

@@ -235,7 +235,7 @@ public interface BukkitImplAdapter<T> extends IBukkitAdapter {
         throw new UnsupportedOperationException("Cannot send fake chunks");
     }
 
-    default boolean regenerate(com.sk89q.worldedit.world.World world, Region region, EditSession editSession) {
+    default boolean regenerate(org.bukkit.World world, Region region, EditSession editSession) {
         return editSession.regenerate(region);
     }
 }

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/FAWE_Spigot_v1_14_R4.java

@@ -378,7 +378,7 @@ public final class FAWE_Spigot_v1_14_R4 extends CachedBukkitAdapter implements I
     }
 
     @Override
-    public boolean regenerate(com.sk89q.worldedit.world.World world, Region region, EditSession editSession) {
+    public boolean regenerate(org.bukkit.World world, Region region, EditSession editSession) {
         WorldServer originalWorld = ((CraftWorld) world).getHandle();
         ChunkProviderServer provider = originalWorld.getChunkProvider();
         if (!(provider instanceof ChunkProviderServer)) {

worldedit-core/src/main/java/com/boydti/fawe/wrappers/WorldWrapper.java

@@ -223,7 +223,7 @@ public class WorldWrapper extends AbstractWorld {
 
     @Override
     public boolean regenerate(Region region, EditSession session) {
-        return session.regenerate(region);
+        return parent.regenerate(region, session);
     }
 
     @Override

worldedit-core/src/main/java/com/sk89q/worldedit/command/HistorySubCommands.java

@@ -330,7 +330,7 @@ public class HistorySubCommands {
                 RollbackOptimizedHistory edit = input.get();
                 UUID uuid = edit.getUUID();
                 int index = edit.getIndex();
-                if (!edit.getBDFile().exists()) {
+                if (!edit.isEmpty()) {
                     database.delete(uuid, index);
                     return TextComponent.empty();
                 }

worldedit-core/src/main/java/com/sk89q/worldedit/command/RegionCommands.java

@@ -656,13 +656,14 @@ public class RegionCommands {
     @CommandPermissions("worldedit.regen")
     @Logging(REGION)
     @Confirm(Confirm.Processor.REGION)
-    public void regenerateChunk(Actor actor, LocalSession session, EditSession editSession, @Selection Region region,
+    public void regenerateChunk(Actor actor, World world, LocalSession session, EditSession editSession, @Selection Region region,
                                 @Arg(def = "", desc = "Regenerate with biome") BiomeType biome,
                                 @Arg(def = "", desc = "Regenerate with seed") Long seed) throws WorldEditException {
         Mask mask = session.getMask();
         session.setMask((Mask) null);
         session.setSourceMask((Mask) null);
-        editSession.regenerate(region, biome, seed);
+        world.regenerate(region, editSession);
+//        editSession.regenerate(region, biome, seed);
         session.setMask(mask);
         session.setSourceMask(mask);
 		actor.printInfo(TranslatableComponent.of("worldedit.regen.regenerated"));