testnet module=miner panic: runtime error

[wyonghao]

Hello my
System info QNG Version=1.0.18+dev-4b7e43b Go version=go1.18.7
when I use:
./qng --testnet --miningaddr=Tk2cWHhntqZT3bV9cK6wJPybmM5CL1Zgk2zgEBS3YXHXXs3yCsoMH --miner --generate --evmenv="--http --http.port=18545 --http.api=net,web3,eth,qng"

It seems to be caused by "--generate" option. it this one no longer supported or there are other problems. Please see below error outputs:

2022-10-16|09:40:41.693 [INFO ] Start CPU Worker... module=miner
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x8 pc=0x17f7890]

goroutine 2248 [running]:
github.com/Qitmeer/qng/meerevm/chain.(*MeerChain).MeerPool(...)
/home/ubuntu/meerlabs/qng/meerevm/chain/meerchain.go:291
github.com/Qitmeer/qng/meerevm/evm.(*VM).GetTxsFromMempool(0x0?)
/home/ubuntu/meerlabs/qng/meerevm/evm/vm.go:294 +0x20
github.com/Qitmeer/qng/vm.(*Service).GetTxsFromMempool(0x1?)
/home/ubuntu/meerlabs/qng/vm/service.go:240 +0x5c
github.com/Qitmeer/qng/services/mempool.(*TxPool).MiningDescs(0x401b79a000)
/home/ubuntu/meerlabs/qng/services/mempool/mempool.go:1208 +0x1dc
github.com/Qitmeer/qng/services/mining.NewBlockTemplate(0x40210e2240, 0x3a278c0, 0x40000805c0?, {0x2c82eb0, 0x401b79a000}, {0x2c7c2a0?, 0x4000618d00?}, 0x4000001440, {0x2c88260?, 0x40007c66c0}, ...)
/home/ubuntu/meerlabs/qng/services/mining/newblocktemplate.go:147 +0x274
github.com/Qitmeer/qng/services/miner.(*Miner).updateBlockTemplate(0x401b79a2c0, 0x18?)
/home/ubuntu/meerlabs/qng/services/miner/miner.go:317 +0x144
github.com/Qitmeer/qng/services/miner.(*CPUWorker).Start(0x401f33e1b0)
/home/ubuntu/meerlabs/qng/services/miner/cpuworker.go:77 +0xc0
github.com/Qitmeer/qng/services/miner.(*Miner).handler(0x401b79a2c0)
/home/ubuntu/meerlabs/qng/services/miner/miner.go:135 +0xc8c
created by github.com/Qitmeer/qng/services/miner.(*Miner).Start
/home/ubuntu/meerlabs/qng/services/miner/miner.go:92 +0xc8