Comment 25 for bug 550218

(In reply to comment #16)
> Created an attachment (id=34628) [details]
> Make DRI2DestroyDrawable more robust if pDraw is invalid
>
> If pDraw is invalid (i.e. we already freed the priv) don't try to use it to
> look up the screen.
>
> I think this is just a workaround... any comments Kristian?

With this patch in a ubuntu lucid environment (xserver 1.7.6, intel 2.9.1+backports, mesa 7.7.1) it still happens, but the probability of occurance is greatly reduced instead of being guaranteed at every closure of quadrapassel. With xorg-edgers packages (mesa 7.9, intel 2.11) on lucid as well as this xserver patch it completely goes away though.