gradle-cucumber InstantiationException

[eldondev]

Gradle-cucumber sometimes fails when a groovy class somewhere in the dependency tree does not have a no-arg constructor. Unsure if this is specific to gradle-cucumber or a further upstream dependency. I will attempt to generate a minimal example and hopefully a pull-request soon, but wanted to capture this now that I have diagnosed and discovered a workaround (create a no-arg constructor, and an init() method that it is then necessary to call.