[Python-Dev] [Python-checkins] Daily reference leaks (b78574cb00ab): sum=1120

[Kevin Modzelewski]

Hi Yury, you may be interested in some leak-finding code that wrote for
Pyston.  It uses the GC infrastructure to show you objects that were
directly leaked, ignoring indirect leaks -- ie objects that were only
leaked because they were referenced by a leaked object.  It can often give
you a very small list of objects to look into (depending on how many non-gc
objects were leaked).  If you're interested I can try porting it to CPython.

https://github.com/dropbox/pyston/blob/master/from_cpython/Modules/gcmodule.c#L894

kmod

On Wed, Nov 9, 2016 at 7:16 AM, Yury Selivanov <yselivanov.ml at gmail.com>
wrote:

> I'm trying to fix refleaks in 3.6.  So far:
>
> On 2016-11-09 4:02 AM, solipsis at pitrou.net wrote:
>
> results for b78574cb00ab on branch "default"
>> --------------------------------------------
>>
>> test_ast leaked [98, 98, 98] references, sum=294
>> test_ast leaked [98, 98, 98] memory blocks, sum=294
>> test_asyncio leaked [3, 0, 0] memory blocks, sum=3
>> test_code leaked [2, 2, 2] references, sum=6
>> test_code leaked [2, 2, 2] memory blocks, sum=6
>> test_functools leaked [0, 3, 1] memory blocks, sum=4
>> test_pydoc leaked [106, 106, 106] references, sum=318
>> test_pydoc leaked [42, 42, 42] memory blocks, sum=126
>> test_trace leaked [12, 12, 12] references, sum=36
>> test_trace leaked [11, 11, 11] memory blocks, sum=33
>>
>>
>>
> test_ast, test_code and test_trace were fixed by
> https://hg.python.org/cpython/rev/2c6825c9ecfd
>
> test_pydoc leaks in test_typing_pydoc. I tried git bisect and it looks
> like that the first commit that introduced the refleak was the one that
> added test_typing_pydoc!
>
> 62127e60e7b0 doesn't modify any CPython internals, so it looks like that
> test_typing_pydoc exposed some bug that has existed before it. Any help
> tracking that down is welcome :)
>
> Yury
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