On Wednesday, December 26, 2012 8:20:03 PM UTC+1, Jean-Pierre Flori wrote: > > > > On Wednesday, December 26, 2012 8:08:24 PM UTC+1, Jean-Pierre Flori wrote: >> >> >> >> On Wednesday, December 26, 2012 6:49:52 PM UTC+1, Jean-Pierre Flori wrote: >>> >>> The offending object seems to be a weakref which is not refcounted >>> correctly. >>> Not sure which yet. >>> >> Not sure why, but it might be the one initialized by the Expect class at >> the line: >> quit.expect_objects.append(weakref.ref(self)) >> >> If I add: >> import gc >> print gc.get_referrers(quit.expect_objects[-1]) >> >> I get: >> [Mathematica, [<weakref at 0x21c07c0; to 'Mathematica' at 0x21bd490>]] >> >> Strange that Mathematica points to its weakref. >> The second member is quit.expect_object I assume. >> > Really strange. > If I del the weakref and then mathematica (from > sage.interfaces.mathematica), everything is fine (until it fails later in > InfinityRing). > But if I try to del mathematica directly, then bang! > (Using sys.getrefcount shows there is no problem until the call to del)
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