allowed regions can be null

worldedit-core/src/main/java/com/boydti/fawe/util/EditSessionBuilder.java

@@ -457,6 +457,7 @@ public class EditSessionBuilder {
         return wnaMode;
     }
 
+    @Nullable
     public Region[] getAllowedRegions() {
         return allowedRegions;
     }

worldedit-core/src/main/java/com/sk89q/worldedit/EditSession.java

@@ -265,7 +265,7 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
         this.blockBag = builder.getBlockBag();
         this.history = changeSet != null;
         this.wnaMode = builder.isWNAMode();
-        this.allowedRegions = builder.getAllowedRegions().clone();
+        this.allowedRegions = builder.getAllowedRegions() != null ? builder.getAllowedRegions().clone() : null;
     }
 
     /**