QBasicAtomicInt::ref() - what the hell is this?

[high_flyer]

I am not an asm junkie, but as far as I can tell, most (all?) your questions are answered here:
http://www.ibiblio.org/gferg/ldp/GCC...WTO.html#ss5.4

[tbscope]

It's an atomic reference counter.

[Septi]

Thanks for the answer, that's some interesting reading material. I was only familiar with Intel syntax before

[bothorsen]

When this happens, it usually means an object has been double deleted. Use a memory checker like valgrind to go over your code to find the place.