old_contents: import assign from 'lodash.assign'
  import createDebug from 'debug'
  import WebSocket from 'ws'
  
  const debug = createDebug('xo:wsProxy')
  
  const defaults = {
    // Automatically close the client connection when the remote close.
    autoClose: true
  }
  
  // Proxy a WebSocket `client` to a remote server which has `url` as
  // address.
  export default function wsProxy (client, url, opts) {
    opts = assign({}, defaults, opts)
    const autoClose = !!opts.autoClose
    delete opts.autoClose
  
    function onClientSendError (error) {
      debug('client send error', error)
    }
    function onRemoteSendError (error) {
      debug('remote send error', error)
    }
  
    const remote = new WebSocket(url, opts).once('open', function () {
      debug('connected to %s', url)
    }).once('close', function () {
      debug('remote closed')
  
      if (autoClose) {
        client.close()
      }
    }).once('error', function (error) {
      debug('remote error: %s', error)
    }).on('message', function (message) {
      client.send(message, onClientSendError)
    })
  
    client.once('close', function () {
      debug('client closed')
      remote.close()
    }).on('message', function (message) {
      remote.send(message, onRemoteSendError)
    })
  }
  
new_contents: import assign from 'lodash.assign'
  import createDebug from 'debug'
  import WebSocket from 'ws'
  
  const debug = createDebug('xo:wsProxy')
  
  const defaults = {
    // Automatically close the client connection when the remote close.
    autoClose: true
  }
  
  // Proxy a WebSocket `client` to a remote server which has `url` as
  // address.
  export default function wsProxy (client, url, opts) {
    opts = assign({}, defaults, opts)
    const autoClose = !!opts.autoClose
    delete opts.autoClose
  
    function onClientSend (error) {
      if (error) {
        debug('client send error', error)
      }
    }
    function onRemoteSend (error) {
      if (error) {
        debug('remote send error', error)
      }
    }
  
    const remote = new WebSocket(url, opts).once('open', function () {
      debug('connected to %s', url)
    }).once('close', function () {
      debug('remote closed')
  
      if (autoClose) {
        client.close()
      }
    }).once('error', function (error) {
      debug('remote error: %s', error)
    }).on('message', function (message) {
      client.send(message, onClientSend)
    })
  
    client.once('close', function () {
      debug('client closed')
      remote.close()
    }).on('message', function (message) {
      remote.send(message, onRemoteSend)
    })
  }
  
subject: Fix send error messages in wsProxy.