Will you "spot the deadlock" with dupdop?

On "many cores", his blog dedicated to multithreading and concurrency issues, one of my friends proposed a new and very funny trivia game: "Spot the deadlock".

In a nutshell, dupdob will regularly present code snippets which exhibit some concurrency related problem, and will let every one of us finding what concurrency issue is present, why does it happend, and how can it be fixed.

The idea is to leave us one week to give our answers, before all the comments are shown.


The very first (easy) episode is already available here:

http://dupdob.wordpress.com/2013/01/23/can-you-spot-the-deadlock/

Will you spot the deadlock ?

Have fun!