iTasks.API.Common.InteractionTasks findSelection index out of range
See attached chat.icl. Compile it with the Tonic compiler so you get dynamic blueprints. Start the example, go to localhost, run the Tonic viewer task and go to dynamic blueprints. Open a "chat string session" task. Go back to the dynamic Tonic viewer and open a blueprint. The program will crash on the !! combinator. In my test, this happens in findSelection in iTasks.API.Common.InteractionTasks with index 0.
As an aside: using !! should probably be avoided where ever possible. It's inefficient and unsafe.