Merge pull request #929 from redis/handle-empty-stream-responses

Handle empty stream responses

Author: byroot

lib/redis.rb

@@ -3423,7 +3423,12 @@ def method_missing(command, *args) # rubocop:disable Style/MissingRespondToMissi
     end
   }
 
+  EMPTY_STREAM_RESPONSE = [nil].freeze
+  private_constant :EMPTY_STREAM_RESPONSE
+
   HashifyStreamEntries = lambda { |reply|
+    return [] if reply == EMPTY_STREAM_RESPONSE
+
     reply.map do |entry_id, values|
       [entry_id, values.each_slice(2).to_h]
     end