#vulnerable code 
                                boolean linkExports(final Linkage linkage) throws ModuleLoadException {
        final HashMap<String, List<LocalLoader>> exportsMap = new HashMap<String, List<LocalLoader>>();
        final Dependency[] dependencies = linkage.getSourceList();
        final long start = Metrics.getCurrentCPUTime();
        long subtractTime = 0L;
        try {
            final Set<Visited> visited = new FastCopyHashSet<Visited>(16);
            final FastCopyHashSet<PathFilter> filterStack = new FastCopyHashSet<PathFilter>(8);
            subtractTime += addExportedPaths(dependencies, exportsMap, filterStack, visited);
            synchronized (this) {
                if (this.linkage == linkage) {
                    this.linkage = new Linkage(linkage.getSourceList(), LINKED_EXPORTS, linkage.getAllPaths(), exportsMap);
                    notifyAll();
                    return true;
                }
                // else all our efforts were just wasted since someone changed the deps in the meantime
                return false;
            }
        } finally {
            moduleLoader.addLinkTime(Metrics.getCurrentCPUTime() - start - subtractTime);
        }
    } 
                            #location 9 
                            #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;
    }