def "configuration cycle error contains information useful for troubleshooting"() {
        when:
        buildScript '''
            class Rules extends RuleSource {
                @Model
                String first(@Path("second") String second) {
                    "foo"
                }

                @Model
                String second() {

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Denotes that the {@link RuleSource} method rule carrying this annotation initializes the rule subject with default values.
 * <p>

import org.gradle.api.Incubating;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.model.Defaults;
import org.gradle.model.ModelMap;
import org.gradle.model.RuleSource;
import org.gradle.nativeplatform.NativeComponentSpec;
import org.gradle.nativeplatform.test.cunit.CUnitTestSuiteSpec;
import org.gradle.nativeplatform.test.internal.NativeTestSuites;

            }

            @Managed
            interface Family {
                String getName()
                void setName(String name)
            }

            class RulePlugin extends RuleSource {
                @Model
                void somePlatform(Platform platform) {
                    assert platform.displayName == null
                    assert platform.operatingSystem != null

import org.gradle.internal.service.ServiceRegistry;
import org.gradle.language.base.plugins.LifecycleBasePlugin;
import org.gradle.model.Model;
import org.gradle.model.Mutate;
import org.gradle.model.RuleSource;
import org.gradle.model.Validate;
import org.gradle.model.internal.core.Hidden;
import org.gradle.model.internal.core.NamedEntityInstantiator;
import org.gradle.model.internal.core.NodeInitializerRegistry;

    }

    @Override
    public void put(String name, T instance) {
        throw new UnsupportedOperationException();
    }

    @Override
    public void named(String name, Class<? extends RuleSource> ruleSource) {
        throw new UnsupportedOperationException();
    }

    @Override
    public void all(Action<? super T> configAction) {
        collection.all(configAction);
    }

    @Override

import org.gradle.model.Model;
import org.gradle.model.ModelMap;
import org.gradle.model.Mutate;
import org.gradle.model.RuleSource;

/**
 * These bindings are only here for backwards compatibility, as some users might depend on the extensions being available in the model.
 */
class PublishingPluginRules extends RuleSource {
    @Model
    PublishingExtension publishing(ExtensionContainer extensions) {

    def "invalid model name produces error message"() {
        when:
        buildScript """
            class MyPlugin {
                static class Rules extends RuleSource {
                    @Model(" ")
                    List<String> strings() {
                      []
                    }
                }
            }

            apply type: MyPlugin
        """

import org.gradle.language.base.internal.LanguageSourceSetInternal;
import org.gradle.language.base.sources.BaseLanguageSourceSet;
import org.gradle.model.Model;
import org.gradle.model.RuleSource;
import org.gradle.platform.base.ComponentType;
import org.gradle.platform.base.TypeBuilder;
import org.gradle.platform.base.plugins.ComponentBasePlugin;

/**
 * Base plugin for language support.
 *

            }

            @Managed
            interface Child {
                Parent getParent()
                void setParent(Parent parent)
            }

            class RulePlugin extends RuleSource {
                @Model
                void parent(Parent parent) {
                    parent.name = "parent"
                    parent.child.parent = parent
                }

                @Mutate