[Python-Dev] [Python-checkins] Daily reference leaks (d7e490db8d54): sum=61494

[Brett Cannon]

On Wed, 21 Oct 2015 at 09:33 Joe Jevnik <jjevnik at quantopian.com> wrote:

> Sorry about introducing this. Where can I subscribe to these automated
> emails.
>

The emails are sent to the python-checkins mailing list.


> Also, how do I go about running this locally?
>

If you look at the bottom of the email that reports the leaks you will
notice it tells you how the tests were run, e.g.:

 ['./python', '-m', 'test.regrtest', '-uall', '-R',
'3:3:/home/psf-users/antoine/refleaks/reflogyrNnBL', '--timeout', '7200']

-Brett




> On default I tried running
> `./python -m test -l test_capi` did not print anything about leaks. I
> think that
> using `object.__new__` as a decorator here is the same as subclassing
> object,
> overriding __new__ and then making a call to `super().__new__` so I would
> imagine this bug could appear in less "clever" situations. I would love to
> help
> fix this issue; Benjamin, you mentioned that you think that maybe all
> heaptypes
> should have gc, do you have a suggestion on where I can look in the code
> to try
> to make this change?
>
> On Wed, Oct 21, 2015 at 11:53 AM, Random832 <random832 at fastmail.com>
> wrote:
>
>> Raymond Hettinger <raymond.hettinger at gmail.com> writes:
>> > Thanks for hunting this down.  I had seen the automated reference leak
>> > posts but didn't suspect that a pure python class would have caused
>> > the leak.
>> >
>> > I'm re-opening
>> > https://mail.python.org/pipermail/python-dev/2015-October/141993.html
>> > and will take a look at it this weekend.  If I don't see an obvious
>> > fix, I'll revert Joe's patch until a correct patch is supplied and
>> > reviewed.
>>
>> If a pure python class can cause a reference leak, doesn't that mean it
>> is only a symptom rather than the real cause? Or is it that the use of
>> @object.__new__ is considered "too clever" to be worth fixing?
>>
>
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