TypeError: bestRankingItems.push is not iterable (cannot read property Symbol(Symbol.iterator))
at BingDialogueHandler.analyzeCommand (/home/travis/build/stanford-oval/thingpedia-common-devices/main/com.bing/index.js:48:676)
at runMicrotasks (<anonymous>)
at processTicksAndRejections (internal/process/task_queues.js:97:5)
at async ThingpediaDialogueHandler.analyzeCommand (/home/travis/build/stanford-oval/thingpedia-common-devices/node_modules/genie-toolkit/dist/lib/dialogue-agent/handlers/3rdparty.js:109:23)
at async DialogueLoop._analyzeCommand (/home/travis/build/stanford-oval/thingpedia-common-devices/node_modules/genie-toolkit/dist/lib/dialogue-agent/dialogue-loop.js:173:34)
at async DialogueLoop._handleUserInput (/home/travis/build/stanford-oval/thingpedia-common-devices/node_modules/genie-toolkit/dist/lib/dialogue-agent/dialogue-loop.js:291:41)
at async DialogueLoop._loop (/home/travis/build/stanford-oval/thingpedia-common-devices/node_modules/genie-toolkit/dist/lib/dialogue-agent/dialogue-loop.js:354:21)
Invalid reply: Sorry, I had an error processing your command: bestRankingItems.push is not iterable (cannot read property Symbol(Symbol.iterator)).
>> expecting = null
From the scenario tests: