when:
        container.configureEach(method)
        then:
        noExceptionThrown()

        when:
        container.withType(container.type).configureEach(method)
        then:
        noExceptionThrown()

        when:
        container.matching({ it in container.type }).configureEach(method)
        then:
        noExceptionThrown()

```kotlin
tasks.withType<AbstractCompile>().configureEach {
    // ...
}
```

needs to be changed to
```kotlin
tasks.withType<AbstractCompile>().configureEach {
    // ...
}
tasks.withType<KotlinCompile>().configureEach {
    // ...
}
```

==== Upgrade to Groovy 3.0.13

----
=====
====

Clients should configure the `war` task  directly.
Also, link:{javadocPath}/org/gradle/api/DomainObjectCollection.html#withType-java.lang.Class-[tasks.withType(War.class).configureEach(...)] can be used to configure each task of type `War`.

====
[.multi-language-sample]
=====
.build.gradle.kts
[source,kotlin]
----
plugins {
    id("war")
}

tasks.war {

        buildFile << """
            class CounterConventionPlugin implements Plugin<Project> {
                void apply(Project project) {
                    project.gradle.sharedServices.registrations.configureEach {
                        if (parameters instanceof CountingParams) {
                            parameters.initial = parameters.initial.get() + 5
                        }
                    }

        }
    }

    def "reports problems from deferred task configuration action block"() {
        file("script.gradle") << """
            tasks.configureEach {
                System.getProperty("PROP")
                gradle.buildFinished { }
            }
        """
        buildFile << """
            apply from: 'script.gradle'
            task ok

        when:
        buildFile << """
            tasks.withType(Copy).configureEach {
                duplicatesStrategy = DuplicatesStrategy.EXCLUDE
            }
        """
        run 'copy'

        then:
        file('dest').assertHasDescendants('path/file.txt')