twice.nim

proc redisCommand*(redis: Redis, command: seq[string]):
    Future[RedisReply] {.async.} =

  ## Execute a redis command.

  echo "command: ", command

  await ( Future[void](redis.socketAvailable) )

  doAssert(finished(redis.socketAvailable))

  echo "cleaning"
  FutureVar[void](redis.socketAvailable).clean()

  doAssert(not finished(redis.socketAvailable))


  redis.writeCommand(command)
  result = await readResponse(redis)

  echo "completing sockAvail on " & $command
  redis.socketAvailable.complete()
  
  
command: @[GET, 0]
cleaning
completing sockAvail on @[GET, 0]
completing sockAvail on @[GET, 0]
Traceback (most recent call last)
  
Error: unhandled exception: An attempt was made to complete a Future more than once. Details:
Future ID: 2
Created in proc: redis.inflight(10.2.1.7:6379)