hxnan opened a new issue, #815:
URL: https://github.com/apache/rocketmq-client-go/issues/815
```
panic: runtime error: index out of range [-1]
goroutine 359187 [running]:
math/rand.(*rngSource).Uint64(0xc000452000)
D:/Go/src/math/rand/rng.go:250 +0x148
math/rand.(*rngSource).Int63(0xc000452000)
D:/Go/src/math/rand/rng.go:234 +0x2c
math/rand.(*Rand).Int63(0xc0004382a0)
D:/Go/src/math/rand/rand.go:84 +0x38
math/rand.(*Rand).Int31(0xc0004382a0)
D:/Go/src/math/rand/rand.go:98 +0x2b
math/rand.(*Rand).Int31n(0xc0004382a0, 0x8)
D:/Go/src/math/rand/rand.go:130 +0x50
math/rand.(*Rand).Intn(0xc0004382a0, 0x8)
D:/Go/src/math/rand/rand.go:171 +0x53
github.com/apache/rocketmq-client-go/v2/producer.randomQueueSelector.Select({0xc0004382a0},
0xc000413b20, {0xc00020c8c0, 0x8, 0x8})
D:/git/router-go/vendor/github.com/apache/rocketmq-client-go/v2/producer/selector.go:57
+0x4e
github.com/apache/rocketmq-client-go/v2/producer.(*hashQueueSelector).Select(0xc0003b8fc0,
0xc000413b20, {0xc00020c8c0, 0x8, 0x8})
D:/git/router-go/vendor/github.com/apache/rocketmq-client-go/v2/producer/selector.go:110
+0xb5
github.com/apache/rocketmq-client-go/v2/producer.(*defaultProducer).selectMessageQueue(0xc000384ea0,
0xc000413b20)
D:/git/router-go/vendor/github.com/apache/rocketmq-client-go/v2/producer/producer.go:396
+0x557
github.com/apache/rocketmq-client-go/v2/producer.(*defaultProducer).sendSync(0xc000384ea0,
{0x1226ae8, 0xc0000360e8}, 0xc000413b20, 0xc000234480)
D:/git/router-go/vendor/github.com/apache/rocketmq-client-go/v2/producer/producer.go:188
+0x168
github.com/apache/rocketmq-client-go/v2/producer.(*defaultProducer).SendSync(0xc000384ea0,
{0x1226ae8, 0xc0000360e8}, {0xc0004ac0a8, 0x1, 0x1})
D:/git/router-go/vendor/github.com/apache/rocketmq-client-go/v2/producer/producer.go:170
+0x41b
```
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