}

    @Inject
    protected StyledTextOutputFactory getTextOutputFactory() {
        throw new UnsupportedOperationException();
    }

    @Inject
    protected ProviderFactory getProviderFactory() {
        throw new UnsupportedOperationException();
    }

    @Inject
    protected abstract ToolchainConfiguration getToolchainConfiguration();

    def "emits deprecation warning when convention mapping is used with Provider"() {
        buildFile << """
            abstract class MyTask extends DefaultTask {
                @Inject abstract ProviderFactory getProviderFactory()

                @Internal abstract Property<String> getOther()

                @Internal Provider<String> getFoo() {
                    return other;
                }

                @TaskAction

    String getEffectivePackageName(BuildInitializer initializer) {
        String packageName = this.packageName;
        if (initializer.supportsPackage()) {
            if (packageName == null) {
                return getProviderFactory().gradleProperty(SOURCE_PACKAGE_PROPERTY).getOrElse(SOURCE_PACKAGE_DEFAULT);
            }
        } else if (!isNullOrEmpty(packageName)) {