Tapping and releasing a window while moving it with another finger, then tapping it after the drag finishes kills mutter
What a long title for this bug. The behaviour is basically what it says on the label, if you follow the following steps:
- Move a window on a touchscreen using one finger (finger #1 (closed)), keep your finger on the title bar
- Briefly the title bar of the window with another finger (finger #2 (closed)) while still moving the window with the first
- Finally, release finger #1 (closed) then try to close the window in question by tapping it's close button using the touchscreen
After doing this, gnome-shell/mutter will suddenly crash. I've attached a full backtrace of all threads + a coredump of the process here mutter-2-finger-crash.tar.xz