net.lua - No callback on connection errors about luvit HOT 5 OPEN

local net = require('net')

local client
client = net.createConnection(12345, '127.0.0.1', function (err)

  if err then error(err) end

  print("Connected...")

  -- Send stdin to the server
  process.stdin:on("data",function(data) -- or 'process.stdin:pipe(client)'
    client:write(data)
  end)

  -- Send the server's response to stdout
  client:on("data",function(data) -- or 'client:pipe(process.stdout)'
    process.stdout:write(data)
  end)

  -- Error handler
  client:on("error",function(err)
    print("error: " .. err)
    client:close()
  end)
  
end)