SUMMARY In many cases, it is possible to cause a crash just by dragging one icon over another. STEPS TO REPRODUCE 1. Repeatedly tap one of the icons on the task bar until it "sticks" to the cursor, or initiate a drag. 2. Hover the icon over another icon on the task bar. 3. You may have to tap a few times again to let go of the icon. OBSERVED RESULT The shell hangs, with suddenly a lot of disk activity, and then eventually the entire desktop including kwin crashes. EXPECTED RESULT The icon shouldn't even stick to the mouse in the first place. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Fedora Workstation 33 (available in About System) KDE Plasma Version: 5.20.3 KDE Frameworks Version: 5.75.0 Qt Version: 5.15.1 ADDITIONAL INFORMATION Not sure if this is a "kwin" or "plasmashell" bug. It appears kwin is the one that crashes, since I just get a few characters on the screen once it does, but plasmashell might be causing some havoc here.
Update: Still present in 5.20.4, Qt 5.15.2. In addition I discovered that this bug appears if you use an application launcher widget, dragging one icon over another (eg. to swap positions?) will do the same thing.
Created attachment 141675 [details] screencast of a repro attempt I'm not sure I'm following the right steps, but I can't repro with dragging task bar entries. I also couldn't repro the "repeated clicking causes cursor to get stuck in drag mode" at all. Is this still an issue, and if so - can you review the screencast and let me know what I missed in my repro?
Needs backtrace or more info
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!