fix feature job so it does not fail out when a topic is deleted

lib/jobs/feature_topic_users.rb

@@ -3,8 +3,21 @@ module Jobs
   class FeatureTopicUsers < Jobs::Base
 
     def execute(args)
-      topic = Topic.where(id: args[:topic_id]).first
-      raise Discourse::InvalidParameters.new(:topic_id) unless topic.present?
+      topic_id = args[:topic_id]
+      raise Discourse::InvalidParameters.new(:topic_id) unless topic_id.present?
+
+      topic = Topic.where(id: topic_id).first
+
+      # there are 3 cases here
+      # 1. topic was atomically nuked, this should be skipped
+      # 2. topic was deleted, this should be skipped
+      # 3. error an incorrect topic_id was sent
+
+      unless topic.present?
+        max_id = Topic.with_deleted.maximum(:id).to_i
+        raise Discourse::InvalidParameters.new(:topic_id) if max_id < topic_id
+        return
+      end
 
       topic.feature_topic_users(args)
     end