Memory leak when coap request get error

coap-debug.js

/////
///// Execute with: node --max-old-space-size=6 --max_semi_space_size=1 coap-debug.js
/////

var coap = require('coap')

var count = 0

function get() {
  var nErrors = 0
  var n = count++
  if (count % 10 == 0) {
    console.log('Heap used: ' + process.memoryUsage().heapUsed)
  }
  console.log("Starting GET number " + count)
  coap.request({host: "aaaa::212:7402:2:202", pathname: "/test/path", method: 'GET'})
    .on('response', function (res) {
      res.on('data', function () {})
      res.on('end', function () {
        console.log('GET completed ' + n + '')
      })
    })
    .on('error', function (e) {
      nErrors++
      console.log('Request error <' + nErrors + '> :' + e.toString())
    })
    .end()
}

setInterval(get, 1000)