#vulnerable code 
                                Class<?> loadModuleClass(final String className, final boolean exportsOnly, final boolean resolve) {
        for (String s : systemPackages) {
            if (className.startsWith(s)) {
                try {
                    return moduleClassLoader.loadClass(className, resolve);
                } catch (ClassNotFoundException e) {
                    return null;
                }
            }
        }
        final String path = pathOfClass(className);
        final Map<String, List<LocalLoader>> paths = getPathsUnchecked(exportsOnly);
        final List<LocalLoader> loaders = paths.get(path);
        if (loaders != null) {
            Class<?> clazz;
            for (LocalLoader loader : loaders) {
                clazz = loader.loadClassLocal(className, resolve);
                if (clazz != null) {
                    return clazz;
                }
            }
        }
        final LocalLoader fallbackLoader = this.fallbackLoader;
        if (fallbackLoader != null) {
            return fallbackLoader.loadClassLocal(className, resolve);
        }
        return null;
    } 
                            #location 12 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                Module(final ConcreteModuleSpec spec, final ModuleLoader moduleLoader, final Object myKey) {
        this.moduleLoader = moduleLoader;
        this.myKey = myKey;

        // Initialize state from the spec.
        identifier = spec.getModuleIdentifier();
        mainClassName = spec.getMainClass();
        fallbackLoader = spec.getFallbackLoader();
        //noinspection ThisEscapedInObjectConstruction
        final ModuleClassLoader.Configuration configuration = new ModuleClassLoader.Configuration(this, spec.getAssertionSetting(), spec.getResourceLoaders(), spec.getClassFileTransformer());
        final ModuleClassLoaderFactory factory = spec.getModuleClassLoaderFactory();
        ModuleClassLoader moduleClassLoader = null;
        if (factory != null) moduleClassLoader = factory.create(configuration);
        if (moduleClassLoader == null) moduleClassLoader = new ModuleClassLoader(configuration);
        this.moduleClassLoader = moduleClassLoader;
    }