fails "tasks"

        then:
        failure.assertHasCause("Exception thrown while executing model rule: MyPlugin#addTasks2(ModelMap<Task>, MyModel)")
        failure.assertHasCause("Cannot create 'tasks.a' using creation rule 'MyPlugin#addTasks2(ModelMap<Task>, MyModel) > create(a)' as the rule 'MyPlugin#addTasks1(ModelMap<Task>, MyModel) > create(a)' is already registered to create this model element.")
    }

        given:
        buildFile << """
            ${ruleBasedTasks()}

            class MyPlugin extends RuleSource {
                @Mutate
                void addTasks(ModelMap<EchoTask> tasks) {
                    tasks.create("foo") {
                        message = "foo message"
                    }
                }
            }

            apply type: MyPlugin

                    @Model
                    List<String> strings() {
                      []
                    }

                    @Mutate
                    void addTasks(ModelMap<Task> tasks, List<String> strings) {
                        tasks.create("value") {
                            it.doLast {
                                println "value: $strings"
                            }

                    @Mutate
                    void addTasks(@Path("tasks") Integer s1) {

                    }
                }
            }

            apply type: Plugin1
        """

        when:
        fails "tasks"

        then:
        failure.assertHasCause("There is a problem with model rule Plugin1.Rules#addTasks(Integer).")

        given:
        buildScript '''
            class MyPlugin {
                static class Rules extends RuleSource {
                    @Mutate
                    void addTasks(ModelMap<Task> tasks) {
                        tasks.create("foobar")
                        tasks.create("raboof")
                    }
                }
            }

            apply type: MyPlugin