Mon, 29 Feb 2016 16:25:51 +0100 wenzelm redundant -- already part of Session.finish;
Mon, 29 Feb 2016 16:24:20 +0100 wenzelm proper exit as in Scala version (in contrast to a45ba78abcc1);
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 tip