There is some weird behavior when I use <<:

```ruby
  def host
    host = datastore['RHOST']
    host << ":" + datastore['RPORT'].to_s if datastore['RPORT'] != 80
    host
  end
```

```
[*] Stressing the target memory, this will take a very long time...
[-] Auxiliary failed: SocketError getaddrinfo: nodename nor servname provided, or not known
```