getPreCompiledHeaderObjectFile() >> null
        }

        and:
        def actualArgs = compiler.getArguments(compileSpec)

        then:
        // Almost all options are stripped when using the options file
        actualArgs != commandLineArgs
        // options file should exist
        testDir.file("options.txt").exists()
    }

    var immediateMode: Boolean // TODO:configuration-cache prevent StackOverflowErrors when crossing protocols

    suspend fun read(): Any?

    fun readClass(): Class<*>

    /**
     * Defers the given [action] until all objects have been read.
     */
    fun onFinish(action: () -> Unit)

    fun <T : Any> getSingletonProperty(propertyType: Class<T>): T
}


inline
fun <reified T : Any> ReadContext.getSingletonProperty(): T =

                count = socket.write(buffer);
                if (count < 0) {
                    throw new EOFException();
                } else if (count == 0) {
                    // buffer was full, just call Thread.yield
                    Thread.yield();
                }
            }
            return count;
        }

        private void waitForWriteBufferToDrain() throws IOException {

            // The order in which the executable elements are listed should be the order in which they appear in the code but
            // we take an extra measure of care here and ensure the ordering between all elements.
            .sorted(Comparator.comparing(AbstractInstrumentationProcessor::elementQualifiedName))
            .distinct()
            .collect(Collectors.toList());
    }

        node.getHardSuccessors().forEach(successor -> {
            // We are searching for dependencies between tasks, so we can skip everything which is not a task when searching.
            // For example we can skip all the transform nodes between two task nodes.
            if (successor instanceof TaskNode || successor instanceof OrdinalNode) {
                if (seenNodes.add(successor)) {
                    queue.add(successor);

        file('build.gradle') << """
apply plugin: 'java'
apply plugin: 'groovy'
apply plugin: 'scala'

${mavenCentralRepository()}
dependencies {
    implementation 'org.codehaus.groovy:groovy-all:2.4.10'
    implementation 'org.scala-lang:scala-library:2.11.12'
}

testing.suites.test.useJUnitJupiter()

sourceSets.each {
    configure(it) {
        resources.srcDir 'src'

        MinimalGroovyCompilerDaemonForkOptions groovyOptions = spec.getGroovyCompileOptions().getForkOptions();
        // Ant is optional dependency of groovy(-all) module but mandatory dependency of Groovy compiler;
        // that's why we add it here. The following assumes that any Groovy compiler version supported by Gradle
        // is compatible with Gradle's current Ant version.

    @Serializable
    @SerialName("configuringLambdaArgument")
    data class DefaultConfiguringLambdaArgument(override val objectType: DataTypeRef) : ConfigureAccessor.ConfiguringLambdaArgument

    // TODO: configure all elements by addition key?
    // TODO: Do we want to support configuring external objects?
}


@Serializable
data class DefaultFqName(override val packageName: String, override val simpleName: String) : FqName {

        def parent2Edge = edge(root, false)
        def parent1 = parent1Edge.targetComponent.nodes[0]
        def parent2 = parent2Edge.targetComponent.nodes[0]
        collectOwnStrictVersions(root, ['a']) //root, on all paths
        collectOwnStrictVersions(parent1, ['b', 'c'])
        collectOwnStrictVersions(parent2, ['b', 'd'])

        def child = nextNode()
        def edge1 = edge(parent1, false, null, child)

        extensionMapping.map("sourceSets", Callables.returning(new ArrayList<>()));
        extensionMapping.map("reportsDir", new Callable<File>() {
            @Override
            public File call() {
                return project.getExtensions().getByType(ReportingExtension.class).file(getReportName());
            }
        });
        withBasePlugin(new Action<Plugin>() {
            @Override