[Wayland-bugs] [Bug 776220] GTK applications crash when using touchscreen

[mutter (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=776220

--- Comment #14 from Carlos Garnacho <carlosg at gnome.org> ---
Created attachment 365834
  --> https://bugzilla.gnome.org/attachment.cgi?id=365834&action=edit
wayland: Only send full sequences of touch events to clients

If input happens to be grabbed somewhere along the shell, and ungrabbed
while a touch operation is ongoing, the wayland bits will happily start
sending wl_touch.update events from an undeterminate point, without
clients having ever received wl_touch.down for that id.

Consider those touches grabbed for the entirety of their lifetime, if
wl_touch.down wasn't received by the client, no other events will.

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