On Fri, Mar 13, 2009 at 2:23 PM, Maksim Orlovich
<mo85@cornell.edu> wrote:
> Same happens on both systems tested, both using GNU/Linux environments.
> This
> crash happens also in dolphin (when used with the information panel,
> because
> there is a thumbnail drawn inside), same arguments workaround is
> applicable
> (--graphicssystem).
>
> Is there any additional information needed?
#1) Well, for starters, you need to explain why in the world your
application seems to be using the raster engine and not the X11 engine.
There are absolutely no guarantees that KDE will work this way, at all, as
changing it is not behaviorally compatible.
My Qt was installed using the configure command proposed by README.qt-copy. I don't have any special interest on raster in this application.
#2) valgrind output will say a lot more than the backtrace.
I checked that, I didn't see anything relevant. I'll recheck later and send later on in case i think it is needed.
#3) The other response is likely right. I bet the following accesses
deleted memory with the Raster engine:
const int w = 16, h = 16;
QRgb* data = new QRgb[w*h*4];
std::memset(data, 0, w*h*4);
QImage* i = new QImage(data, w, h, QImage::Format_ARGB32_Premultiplied);
QPixmap p = QPixmap::fromImage(*i);
delete i;
//Do stuff with p here
There seems to be no deep copy going on here (and coincidentally,
QImage::convertToFormat docs lie --- it doesn't always return a copy)