[Python-Dev] Debugging opportunity :-) (original) (raw)

Thomas Wouters thomas at python.org
Fri Apr 14 23:51:39 CEST 2006

On 4/14/06, Phillip J. Eby <pje at telecommunity.com> wrote:

At 03:49 PM 4/14/2006 -0400, Tim Peters wrote: > That eventually >pointed to an off-by-one error in the new PyGenNeedsFinalizing(), >where reading up trash made it very likely that old generators >containing an active loop would falsely claim they need finalization. >Alas, fix that, and Python segfaults when running testgenerators. Even with the close() gimmicks still in place? If so, it sounds like the safest thing for a2 might be to claim that generators always need finalizing. :(

No, it sounds like there's a bug in generator cleanup :-) From Tim's description, it isn't obvious to me that the bug is in the hack to clean up simple generator frames. I had "finding generator-cycle leak in test_generators" on my TODO list (as I'd noticed it was still leaking, too), I've now replaced that with "finding the generator-cleanup crash Tim encountered" :-) I don't know if I'll get to it this weekend, though, so if anyone else wants to hunt for it, don't let me stop you.

-- Thomas Wouters <thomas at python.org>

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