Closing of server socket unexpectedly will crash the client on linux

Issue:
When playing on a server and the server socket is closed unexpectedly (due to killing the process or pressing stop in a debugger), the client will crash.

This issue is only present in creative mode
Issue is as follows:
http://pastebin.com/EpGcFDBN

Please note that the client is not modded, despite what the bug report says 😛