Invalid memory address or nil pointer dereference error occurs in dao withdrawal transaction

[15168316096]

Bug Report

Invalid memory address or nil pointer dereference error occurs in dao withdrawal transaction is reported

Current Behavior

Expected Behavior

I expect developer can use this dao withdraw example normal

Environment

• CKB version: ckb v111
• Chain: /
• Operating system: MacOS 12.1
• Arch: x64
• Installation: /

Additional context/Screenshots

This bug can reproduced by these steps:

func Test_WithdrawDaoExample(t *testing.T) {
   sender := "ckt1qzda0cr08m85hc8jlnfp3zer7xulejywt49kt2rr0vthywaa50xwsq2qf8keemy2p5uu0g0gn8cd4ju23s5269qk8rg4r"
   depositOutPoint := &types.OutPoint{
   	TxHash: types.HexToHash("0xebfb7bff39985865c20bd5b6c0190e58298eb9e4b1ddb9daee16166bed658c40"),
   	Index:  0,
   }

   network := types.NetworkTest
   client, err := rpc.Dial("https://testnet.ckb.dev")
   if err != nil {
   	return
   }
   iterator, err := collector.NewLiveCellIteratorFromAddress(client, sender)
   if err != nil {
   	return
   }

   // build transaction
   builder, err := builder.NewDaoTransactionBuilder(network, iterator, depositOutPoint, client)
   if err != nil {
   	return
   }
   builder.FeeRate = 1000
   if err := builder.AddWithdrawOutput(sender); err != nil {
   	return
   }
   builder.AddChangeOutputByAddress(sender)

   withdrawInfo, err := handler.NewWithdrawInfo(client, depositOutPoint)
   if err != nil {
   	return
   }
   txWithGroups, err := builder.Build(withdrawInfo)
   if err != nil {
   	return
   }

   // sign transaction
   txSigner := signer.GetTransactionSignerInstance(network)
   _, err = txSigner.SignTransactionByPrivateKeys(txWithGroups, "0x6c9ed03816e3111e49384b8d180174ad08e29feb1393ea1b51cef1c505d4e36a")
   if err != nil {
   	return
   }

   // send transaction
   hash, err := client.SendTransaction(context.Background(), txWithGroups.TxView)
   if err != nil {
   	return
   }
   fmt.Println("transaction hash: " + hexutil.Encode(hash.Bytes()))
   return
}

=== RUN   Test_WithdrawDaoExample
--- FAIL: Test_WithdrawDaoExample (1.31s)
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
   panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x8 pc=0x1002ec730]

goroutine 6 [running]:
testing.tRunner.func1.2({0x100345c40, 0x100614e70})
   /usr/local/go/src/testing/testing.go:1389 +0x24e
testing.tRunner.func1()
   /usr/local/go/src/testing/testing.go:1392 +0x39f
panic({0x100345c40, 0x100614e70})
   /usr/local/go/src/runtime/panic.go:838 +0x207
github.com/nervosnetwork/ckb-sdk-go/v2/collector/builder.NewDaoTransactionBuilder(0x100433740?, {0x100434fe8?, 0xc000076660}, 0xc000024990, {0x1004379d0, 0xc000010088})
   /Users/xueyanli/GolandProjects/ckb-sdk-go/collector/builder/dao.go:38 +0xd0
github.com/nervosnetwork/ckb-sdk-go/v2/collector/example.Test_WithdrawDaoExample(0x0?)
   /Users/xueyanli/GolandProjects/ckb-sdk-go/collector/example/example_test.go:321 +0x176
testing.tRunner(0xc000191a00, 0x1003d73a0)
   /usr/local/go/src/testing/testing.go:1439 +0x102
created by testing.(*T).Run
   /usr/local/go/src/testing/testing.go:1486 +0x35f


Process finished with the exit code 1

[15168316096]

This is because the case uses the previously generated deposit cell, which should be combined with the case of deposit nevos dao to obtain a new deposit cell. Therefore, in order to ensure the stability of the case, this value cannot be hard-coded. The process of deposit nervos dao should be quoted first and then withdraw，
same as java sdk