title: EOFError using pwntools
body: <p>I keep receiving an EOFError when trying this CTF challenge. The goal is to receive a line, add an exclamation mark at the end, then send the line back. This will successfully complete the loop 3-7 times, but then give me an EOFError. Any tips?</p>
  <pre><code>from pwn import *
  
  conn = remote('shell.tryouts.bfe.one',65348)
  
  conn.recvuntil(b'', drop=True)
  
  for i in range(50):
      x = conn.recvline(keepends = False)
      print(x)
      y = x + b'!'
      print(y)
      conn.send(y)
  </code></pre>
  <pre><code> File &quot;C:\Users\user\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\pwnlib\tubes\sock.py&quot;, line 56, in recv_raw
      raise EOFError
  EOFError
  </code></pre>