I seem to be getting random failures when running run-webkit-tests. I'm not sure if they are related to any changes I've made or not... I see this one most often: running css1/conformance/forward_compatible_parsing test -> failed which I originally attributed to using Bison 2.0... http://bugzilla.opendarwin.org/show_bug.cgi?id=3885 but it doesn't always fail there. I've seen others: running editing/deleting/delete-3928305-fix test -> failed running editing/deleting/delete-and-undo test -> failed running editing/deleting/delete-3608445-fix test -> failed each time it seems to be a crap shoot as to whether it will succeed or fail at some random test. Cosmic rays? Cryo, bdash and Altha on #webkit are seeing similar issues. About half the time all tests succeed, half the time one of them fails. I've tried rolling out: http://bugzilla.opendarwin.org/show_bug.cgi?id=3882 http://bugzilla.opendarwin.org/show_bug.cgi?id=3829 neither helped. Those are the only fixes I made today which I thought could relate to these crashes at all. Again, I have determined (and bdash has confirmed) that neither is related. Off to bed now. I'm not much use to anyone at this hour. -eric p.s. it is remotely possible that either: http://bugzilla.opendarwin.org/show_bug.cgi?id=3826 or http://bugzilla.opendarwin.org/show_bug.cgi?id=3674 are at fault. Neither seems likely. One guess is that this could be an uncaught error in HashSet?? It seems like some sort of memory smasher since it's so random.