The problem only happens with Redis.bRPop proc. Any ideas?
```
proc bRPop*(r: Redis, keys: varargs[string], timeout: int): RedisList =
## Remove and get the *last* element in a list, or block until one
## is available.
var args: seq[string] = @[]
for i in items(keys): args.add(i)
args.add($timeout)
r.sendCommand("BRPOP", args)
return r.readArray()
```
