Add timeseries to queries

I need to use timeseries queries, which add 0s according to the query granularity when there is no value in the data.

Could you please look this over and tell me what else is needed? I have verified that a legitimate query is being created and sent:

{"dataSource":"webstream","granularity":"second","intervals":["2013-10-09T00:00:00-07:00/2013-10-09T21:04:46-07:00"],"queryType":"timeseries","aggregations":[{"type":"longSum","name":"rows","fieldName":"rows"}]}

However, I get this error: 

NoMethodError: undefined method `keys' for nil:NilClass
    /Users/rjurney/Software/ruby-druid/lib/druid/response_row.rb:19:in `method_missing'
    /Users/rjurney/Software/ruby-druid/lib/druid/console.rb:15:in `format_query_result'
    /Users/rjurney/Software/ruby-druid/lib/druid/console.rb:25:in `format_result'