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backends/x11: Fix time-comparison bug causing hang
A comparison in translate_device_event() does not account for the fact that X's clock wraps about every 49.7 days. When triggered, this causes an unresponsive GUI. Replace simple less-than comparison with XSERVER_TIME_IS_BEFORE macro, which accounts for the wrapping of X's clock. Closes: https://gitlab.gnome.org/GNOME/mutter/issues/12
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@ -112,7 +112,7 @@ translate_device_event (MetaBackendX11 *x11,
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if (!device_event->send_event && device_event->time != CurrentTime)
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{
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if (device_event->time < priv->latest_evtime)
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if (XSERVER_TIME_IS_BEFORE (device_event->time, priv->latest_evtime))
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{
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/* Emulated pointer events received after XIRejectTouch is received
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* on a passive touch grab will contain older timestamps, update those
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