Sun, 19 Jul 2009 18:02:40 +0200 wenzelm more abstract Future.is_worker;
Sun, 19 Jul 2009 17:08:34 +0200 wenzelm tuned;
Sun, 19 Jul 2009 14:15:47 +0200 wenzelm future_result: explicitly impose Variable.sorts_of again;
Sun, 19 Jul 2009 14:14:25 +0200 wenzelm recovered a version of dequeue_towards (cf. bb7b5a5942c7);
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