Utterence cannot be null

[mjwsteenbergen]

At LuisRecognizer.cs#L58 there exists a line to check that the utterence is not null. However, when a user uploads a file (image,recording), there exists no such utterence. This results in an exception.

Tested in Telegram, Web Chat and Emulator

Full stacktrace:

   at Microsoft.Bot.Builder.Ai.LUIS.LuisRecognizer.RecognizeInternal(String utterance, CancellationToken ct)
   at Microsoft.Bot.Builder.Ai.LUIS.LuisRecognizer.<Recognize>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Bot.Builder.Ai.LUIS.LuisRecognizerMiddleware.<OnTurn>d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Bot.Builder.Core.Extensions.CatchExceptionMiddleware`1.<OnTurn>d__2.MoveNext()

I implemented LUIS following the bot framework tutorial

[cleemullins]

Good Catch.

@emadelwany, could you take a look and confirm the correct behavior?

[emadelwany]

I think the recognizer is doing the right thing, but perhaps the middleware should do extra checks before calling the recognizer. Currently it only checks that the activity type is Message, I'll update it to also only invoke the recognizer if the message text is not null/empty.

[SHUBHAMARORA731]

I am facing the same issue using the latest package from NuGet . when can we expect the next release of the package including this resolution.

[FrancescoAntonelli]

Hi when is planned the merge of this issue?
Thanks
Francesco