#vulnerable code 
                                @Test
    public void moduleThrowingInitExceptionShouldBeMarkedForReinitialization() {
        final TxDrivenModule mockModule = createMockModule();
        when(mockModule.getConfiguration()).thenReturn(NullTxDrivenModuleConfiguration.getInstance());
        Mockito.doThrow(new NeedsInitializationException()).when(mockModule).beforeCommit(any(ImprovedTransactionData.class));

        GraphAwareRuntime runtime = GraphAwareRuntimeFactory.createRuntime(database);
        runtime.registerModule(mockModule);

        runtime.start();

        try (Transaction tx = database.beginTx()) {
            assertTrue(getRuntimeRoot().getProperty(GA_PREFIX + RUNTIME + "_" + MOCK).toString().startsWith(CONFIG));
            tx.success();
        }

        try (Transaction tx = database.beginTx()) {
            database.createNode();
            tx.success();
        }

        try (Transaction tx = database.beginTx()) {
            assertTrue(getRuntimeRoot().getProperty(GA_PREFIX + RUNTIME + "_" + MOCK).toString().startsWith(FORCE_INITIALIZATION));
            tx.success();
        }
    } 
                            #location 13 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Test
    public void moduleThrowingInitExceptionShouldBeMarkedForReinitialization() {
        final TxDrivenModule mockModule = createMockModule();
        when(mockModule.getConfiguration()).thenReturn(NullTxDrivenModuleConfiguration.getInstance());
        Mockito.doThrow(new NeedsInitializationException()).when(mockModule).beforeCommit(any(ImprovedTransactionData.class));

        GraphAwareRuntime runtime = GraphAwareRuntimeFactory.createRuntime(database);
        runtime.registerModule(mockModule);

        runtime.start();

        try (Transaction tx = database.beginTx()) {
            TxDrivenModuleMetadata moduleMetadata = repository.getModuleMetadata(mockModule);
            assertEquals(NullTxDrivenModuleConfiguration.getInstance(), moduleMetadata.getConfig());
            assertFalse(moduleMetadata.needsInitialization());
            assertEquals(-1, moduleMetadata.timestamp());
        }

        try (Transaction tx = database.beginTx()) {
            database.createNode();
            tx.success();
        }

        try (Transaction tx = database.beginTx()) {
            TxDrivenModuleMetadata moduleMetadata = repository.getModuleMetadata(mockModule);
            assertEquals(NullTxDrivenModuleConfiguration.getInstance(), moduleMetadata.getConfig());
            assertTrue(moduleMetadata.needsInitialization());
            assertTrue(moduleMetadata.timestamp() > System.currentTimeMillis() - 1000);
        }
    }