output: #fixed code
                                  @Test
      public void testSyncHandleSuccessfulResponse() throws Exception {
          RpcFuture<String> rpcFuture = new RpcFuture<String>(timeout, methodInfo, null, channelInfo, rpcClient);
          RpcResponse response = new RpcResponse();
          response.setResult("hello world");
          rpcFuture.handleResponse(response);
          String resp = rpcFuture.get(1, TimeUnit.SECONDS);
          assertThat(resp, is("hello world"));
      }
input: #vulnerable code 
                                  @Test
      public void testSyncHandleSuccessfulResponse() throws Exception {
          RpcFuture rpcFuture = new RpcFuture<String>(timeout, methodInfo, null, channelInfo, rpcClient);
          RpcResponse response = new RpcResponse();
          response.setResult("hello world");
          rpcFuture.handleResponse(response);
          Response resp = rpcFuture.get(1, TimeUnit.SECONDS);
          assertThat((String) resp.getResult(), is("hello world"));
      } 
                              #location 8 
                              #vulnerability type NULL_DEREFERENCE