[Qt-interest] SIGSEGV in QPixmapCache::Clear()

[R. Reucher]

On Thu, 29 Oct 2009 12:01:53 -0400, Josiah Bryan wrote: 
> Thanks, René - that did help a little. At least the crash is different
> now. :-) I tested with Qt 4.5.2. Now it seems to be coming from
> somewhere inside  libX11 as the result of some call from libeGL.
> Unfortunately, the stack trace below is even less helpful than before.
> Any thoughts?
> 
> X Error of failed request:  BadColor (invalid Colormap parameter)
>    Major opcode of failed request:  79 (X_FreeColormap) Resource id in
>    failed request:  0x9c00001 Serial number of failed request:  4984
>    Current serial number in output stream:  4986
> dviz: xcb_xlib.c:41: xcb_xlib_lock: Assertion `!c->xlib.lock' failed.
Well, it says it right here: "Assertion `!c->xlib.lock' failed"!

You're using xcb_xlib... not sure if this works cleanly in all cases. How 
about using xlib natively?!

Other than that, I have no idea... also, you should post a small portion 
of code for which you can reproduce it on your side. Creating a simpler 
test case often helps to find the issue (provided it's your code, and not 
the xcb_xlib thing).

HTH, René
-- 
René Reucher
rene.reucher at batcom-it.net
http://www.batcom-it.net/