ok thanks for info. It has low code complexity. Only Android Gradle Plugin 4.2.2 prevents the error. Is there a nice way to write a test which detects this issue? This is the official Cookie Clicker app by Orteil & Opti. Turn your hard-earned cookies into sparkling gold coins with this ultimately pointless cash dispenser. You start with earth, water, fire and air, and end up with rainbows and butterflies and such. I thought this looked neat. PlaySound('snd/tick.mp3');Game.ClosePrompt();