return "{details=" + details + " classloaders=" + classLoaders + "}";
        }

        Set<ClassLoader> getClassLoaders() {
            Set<ClassLoader> candidates = new LinkedHashSet<>();
            for (WeakReference<ClassLoader> reference : classLoaders) {
                ClassLoader classLoader = reference.get();
                if (classLoader != null) {
                    candidates.add(classLoader);

            apply from: "script.gradle"

            try {
                getClass().classLoader.loadClass(pluginClass.name)
                assert false
            } catch (ClassNotFoundException ignore) {
                println "not in root"
            } finally {
                getClass().classLoader.close()
            }

        """

        file("script.gradle") << """

        and: 'classloader1 is reused'
        outputContains 'probe(classloader1) => 4'
        outputContains 'probe(classloader1) => 5'
        outputContains 'probe(classloader1) => 6'

        and: 'classloader2 is reused'
        outputContains 'probe(classloader2) => 4'
        outputContains 'probe(classloader2) => 5'
        outputContains 'probe(classloader2) => 6'
    }

        }
    }

    static Package[] getPackages(ClassLoader classLoader) {
        return CLASS_LOADER_PACKAGES_FETCHER.getPackages(classLoader);
    }

    @Nullable
    static Package getPackage(ClassLoader classLoader, String name) {
        return CLASS_LOADER_PACKAGES_FETCHER.getPackage(classLoader, name);
    }

    public static <T> Class<T> define(ClassLoader targetClassLoader, String className, byte[] clazzBytes) {

    Closeable frq = (Closeable) sepFrqUserFrqF.get(null);
    frq.close();

    return new WeakReference<ClassLoader>(sepLoader);
  }

  private URL[] getClassPathUrls() {
    ClassLoader classLoader = getClass().getClassLoader();
    return classLoader instanceof URLClassLoader
        ? ((URLClassLoader) classLoader).getURLs()
        : parseJavaClassPath().toArray(new URL[0]);
  }

  /**

import org.gradle.internal.UncheckedException;
import org.gradle.internal.classloader.ClassLoaderUtils;
import org.gradle.internal.classloader.ImplementationHashAware;
import org.gradle.internal.classloader.InstrumentingClassLoader;
import org.gradle.internal.classloader.TransformErrorHandler;
import org.gradle.internal.classloader.TransformReplacer;
import org.gradle.internal.classloader.VisitableURLClassLoader;
import org.gradle.internal.classpath.ClassPath;

    }

    @ToBeFixedForConfigurationCache(skip = INVESTIGATE)
    def "handles invalid implementation classloader"() {
        given:
        buildScript """
            def classLoader = new GroovyClassLoader(this.class.classLoader)
            def clazz = classLoader.parseClass(\"\"\"${customTaskImpl()}\"\"\")
            task customTask(type: clazz){
                input1 = 'foo'

class DefaultPluginContainerTest extends Specification {

    PluginInspector pluginInspector = new PluginInspector(new ModelRuleSourceDetector())
    def classLoader = new GroovyClassLoader(getClass().classLoader)
    def pluginRegistry = new DefaultPluginRegistry(pluginInspector, scope(classLoader))
    def target = Mock(PluginTarget)
    def instantiator = TestUtil.instantiatorFactory().inject()

    classLoader: ClassLoader = MockProject::class.java.classLoader,
    init: StandaloneAnalysisAPISessionBuilder.() -> Unit,
): StandaloneAnalysisAPISession {
    contract {
        callsInPlace(init, InvocationKind.EXACTLY_ONCE)
    }
    return StandaloneAnalysisAPISessionBuilder(
        projectDisposable,
        unitTestMode,
        classLoader
    ).apply(init).build(

import org.gradle.internal.UncheckedException;
import org.gradle.internal.classloader.ClassLoaderHierarchy;
import org.gradle.internal.classloader.ClassLoaderSpec;
import org.gradle.internal.classloader.ClassLoaderUtils;
import org.gradle.internal.classloader.ClassLoaderVisitor;
import org.gradle.internal.classloader.FilteringClassLoader;
import org.gradle.internal.classloader.SystemClassLoaderSpec;
import org.gradle.internal.classpath.ClassPath;