On Monday, May 30, 2016 11:36:54 AM CEST Kurt Hindenburg wrote: > There are a number of lines that division by zero could happen in > frameworks/kwindowsystem/src/platforms/xcb/kwindowsystem.cpp if > displayGeometry returns a 0 QRect. I think that is what is happening with > bug 349512.
urgh. That means that there are no QScreens with a size. > > viewportToDesktop, viewportWindowToDesktop, desktopToViewport > > I’m not clear on the best way to prevent this. Forcing displayGeometry to > never return a 0 QRect (which seem the best) or by checking all the > locations of division by 0. If the size is 0/0 then returning a false size looks incorrect to me. On the other hand it means that we are in an intermediate state - no screens is not a valid setup. So my suggestion would be to change line 75 to only update the displayGeometry if region.boundingRect() is not empty. Cheers Martin
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