Glitches with subsurfaces
In #861 (closed) it was pointed out that under certain circumstances we do not paint (over overpaint) certain subsurfaces [1].
The fact that the very same application makes GS fill the log with surface-buffer related warnings[2] and uses a combination of synced and non-synced subsurfaces on top of each other makes me suspect that it is actually caused by #115
Neither the warnings nor the glitches happen on Weston.
- For me the glitches look similar to the following image, just that only the window control buttons are missing, not the whole top right corner
Edit: warnings fixed by !868 (merged)