Hitting the submit button in challenge mode prior to getting a challenger and a problem will cause the solution worker to crash. This happens because prior to getting a challenger, the "challenge_id" is 0, and there is no challenge with id 0.
Hitting the submit button in challenge mode prior to getting a challenger and a problem will cause the solution worker to crash.
This happens because prior to getting a challenger, the "challenge_id" is 0, and there is no challenge with id 0.