output: #fixed code
                                  @Test
      public void testBlockByAvailabilityOnAllServices() throws Exception {
          ApolloTestClient apolloTestClient = Common.signupAndLogin();
          ApolloTestAdminClient apolloTestAdminClient = Common.getAndLoginApolloTestAdminClient();
  
          String availability = "BLOCK-ME-2";
          Environment blockedEnvironment = ModelsGenerator.createAndSubmitEnvironment(availability, apolloTestClient);
          Environment environment = ModelsGenerator.createAndSubmitEnvironment(apolloTestClient);
          Service service = ModelsGenerator.createAndSubmitService(apolloTestClient);
          DeployableVersion deployableVersion = ModelsGenerator.createAndSubmitDeployableVersion(apolloTestClient, service);
  
          ModelsGenerator.createAndSubmitDeployment(apolloTestClient, environment, service, deployableVersion);
  
          createAndSubmitBlocker(apolloTestAdminClient, "unconditional", "{}", null, null, null, availability);
          assertThatThrownBy(() -> ModelsGenerator.createAndSubmitDeployment(apolloTestClient, blockedEnvironment, service, deployableVersion)).isInstanceOf(Exception.class)
                                                                                                                                           .hasMessageContaining("Deployment is currently blocked");
      }
input: #vulnerable code 
                                  @Test
      public void testBlockByAvailabilityOnAllServices() throws Exception {
          ApolloTestClient apolloTestClient = Common.signupAndLogin();
          ApolloTestAdminClient apolloTestAdminClient = Common.getAndLoginApolloTestAdminClient();
  
          String availability = "BLOCK-ME-2";
          Environment environment = ModelsGenerator.createAndSubmitEnvironment(availability, apolloTestClient);
          Service service = ModelsGenerator.createAndSubmitService(apolloTestClient);
  
          createAndSubmitBlocker(apolloTestAdminClient, "unconditional", "{}", null, null, null, availability);
          DeployableVersion deployableVersion = ModelsGenerator.createAndSubmitDeployableVersion(apolloTestClient, service);
          assertThatThrownBy(() -> ModelsGenerator.createAndSubmitDeployment(apolloTestClient, environment, service, deployableVersion)).isInstanceOf(Exception.class)
                                                                                                                                           .hasMessageContaining("Deployment is currently blocked");
      } 
                              #location 10 
                              #vulnerability type NULL_DEREFERENCE