void addTasks(ModelMap<Task> tasks) {
                    tasks.named("taskWithUnboundRuleSourceApplied", UnboundRuleSource)
                    tasks.create("taskWithUnboundRuleSourceApplied")
                }
            }

            apply type: Rules
        '''

        then:
        fails "taskWithUnboundRuleSourceApplied"

        and:
        failureCauseContains '''