QCoreApplication.postEvent leaks memory

When calling QCoreApplication.postEvent(reciever,event) in a PySide application, the process leaks memory.

I've attached a minimilistic example, which leaks memory reasonably slowly on my machine. However, I'm trying to write an application that will be calling QCoreApplication.postEvent quite frequently and needs to be able to run without crashing for months.

If you switch to using PyQt4 (I have v4.10.1) there is no memory leak.