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b811ef4331
In the past, a signal context, that was chosen for handling by 'Signal_receiver::pending_signal and always triggered again before the next call of 'pending_signal', caused all other contexts behind in the list to starve. This was the case because 'pending_signal' always took the first pending context in its context list. We avoid this problem now by handling pending signals in a round-robin fashion instead. Ref #2532