classBMask = IPv4Mask(0xff, 0xff, 0, 0)
	classCMask = IPv4Mask(0xff, 0xff, 0xff, 0)
)

// DefaultMask returns the default IP mask for the IP address ip.
// Only IPv4 addresses have default masks; DefaultMask returns
// nil if ip is not a valid IPv4 address.
func (ip IP) DefaultMask() IPMask {
	if ip = ip.To4(); ip == nil {
		return nil
	}
	switch {
	case ip[0] < 0x80:
		return classAMask

    }

    public static String kotlinIoFilesKtReadTextDefault(File receiver, Charset charset, int defaultMask, Object defaultMarker, String consumer) throws Throwable {
        listener().fileOpened(receiver, consumer);
        return (String) FILESKT_READ_TEXT_DEFAULT.get().invokeExact(receiver, charset, defaultMask, defaultMarker);
    }

    private static final Lazy<MethodHandle> FILESKT_READ_TEXT_DEFAULT =

        testDirectory.file("buildSrc/src/main/java/SneakyTask.java") << """
            import ${DefaultTask.name};
            import ${ExecOperations.name};
            import ${Inject.name};
            import ${TaskAction.name};
            ${snippets.imports}

            public abstract class SneakyTask extends DefaultTask {
                @Inject
                protected abstract ExecOperations getExecOperations();

            import org.gradle.api.file.ConfigurableFileCollection;
            import org.gradle.api.DefaultTask;
            import org.gradle.api.tasks.InputFiles;

            abstract class AbstractCustomTask extends DefaultTask {
                private final ConfigurableFileCollection sourceFiles = getProject().files();

                @InputFiles

        container.create("task", DefaultTask)

        when:
        container.withType(DefaultTask).named("task")

        then:
        noExceptionThrown()
    }

    void "can get() if task is lazily created before"() {
        given:
        container.register("task", DefaultTask)

        when:
        container.withType(DefaultTask).named("task")

        then:

                fqid == 'validation:configuration-cache-cannot-serialize-object-of-type-org-gradle-api-defaulttask-a-subtype-of-org-gradle-api-task-as-these-are-not-supported-with-the-configuration-cache'
                contextualLabel == 'cannot serialize object of type \'org.gradle.api.DefaultTask\', a subtype of \'org.gradle.api.Task\', as these are not supported with the configuration cache.'
            }
        }

    }

    class ClasspathPropertyTask extends DefaultTask {
        @Classpath
        FileCollection classpathOnly
        @Classpath
        @InputFiles
        FileCollection classpathInputFiles
        @InputFiles
        @Classpath
        FileCollection inputFilesClasspath
    }

    class CompileClasspathPropertyTask extends DefaultTask {
        @CompileClasspath

import org.gradle.api.Plugin
import org.gradle.api.Project
import org.gradle.api.file.FileSystemOperations
import org.gradle.api.provider.ProviderFactory
import org.gradle.api.DefaultTask
import org.gradle.api.tasks.Input
import org.gradle.api.tasks.TaskAction
import org.gradle.workers.WorkAction
import org.gradle.workers.WorkParameters
import org.gradle.workers.WorkerExecutor
import org.gradle.tooling.provider.model.ToolingModelBuilder

                ext.custom = 'repository'
            }
            defaultTask.custom = 'another value'
            javaTask.custom = 'another value'
            groovyTask.custom = 'another value'
            assert !project.hasProperty('custom')
            assert defaultTask.hasProperty('custom')
            assert defaultTask.custom == 'another value'
            assert javaTask.custom == 'another value'

        buildFile << """
            class TaskWithNestedProperty extends DefaultTask  {
                @Nested
                Object bean
            }

            class NestedBeanWithInput {
                @InputFiles
                FileCollection input
            }

            class GeneratorTask extends DefaultTask {
                @OutputFile