When an application closes/crashes while the quick-tile effect is used, the white rectangle which shows the preview of the new window size will be left behind. How to reproduce: 1. Start an application (e.g. "kwrite") 2. Set a timer to kill it within a few seconds (sleep 10 && killall kwrite) 3. Use now the quick-tile effect and drag the application's window against a display border to show the transparent rectangle/window size preview - wait until the application is terminated The transparent preview rectangle will stay visible although the application window to which it belonged doesn't exist anymore. Running latest KF5/P5 from git master as of now + Qt 5.4.0 rc.
Created attachment 89880 [details] Screenshot Reproducible for me too. (I'm running latest KF5 from Kubuntu CI unstable daily) Preview rectangle doesn't disappear even when mouse button is released. Also, it's impossible to click on anything behind it.
A backtrace might help to identify the culprit.
@Myriam: might it be that you commented on the wrong bug report? This one has already a fix, so a backtrace is not really needed ;-)
@Martin: sorry, I missed the link to reviewboard.
(In reply to Myriam Schweingruber from comment #4) > @Martin: sorry, I missed the link to reviewboard. but even then a backtrace is not needed. No crash is involved in this bug, it's just incorect behavior if the window being moved gets closed (e.g. by a crash).
Git commit d6014927e79ac9c72c89214feba7b58a3ff0d037 by Martin Gräßlin. Committed on 09/12/2014 at 16:27. Pushed by graesslin into branch 'Plasma/5.1'. Cleanup electric border handling in leaveMoveResize If a Client closed during move/resize with the outline being shown for quick tile/maximize area, the outline never got removed. FIXED-IN: 5.1.2 REVIEW: 121410 M +4 -2 geometry.cpp http://commits.kde.org/kwin/d6014927e79ac9c72c89214feba7b58a3ff0d037