* python bindings memory management
@ 2017-11-19 15:42 Gaute Hope
2017-11-19 23:11 ` David Bremner
0 siblings, 1 reply; 3+ messages in thread
From: Gaute Hope @ 2017-11-19 15:42 UTC (permalink / raw)
To: notmuch
Hi,
when writing this small script [0][1] using the notmuch python bindings I
had to manually delete the python objects in the right order. Otherwise
it segfaults when exiting, presumably because memory dependencies /
cleanup isn't done correctly when the Python GC gets going. Essentially
I have to delete the objects in the order of their dependency:
```
db = notmuch.Database()
q = db.create_query ("some query")
q.set_sort (notmuch.Query.SORT.OLDEST_FIRST) # probably not necessary
msgs = q.search_messages ()
for m in msgs:
pass
# remove these to get segfault
del m
del msgs
del q
```
Regards, Gaute
[0] https://gist.github.com/gauteh/de546cb143ebae4a489a482a05ab4beb
[1] id:1507537566.y6qjbg4xoq.astroid@strange.none
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: python bindings memory management
2017-11-19 15:42 python bindings memory management Gaute Hope
@ 2017-11-19 23:11 ` David Bremner
2017-11-20 10:56 ` Gaute Hope
0 siblings, 1 reply; 3+ messages in thread
From: David Bremner @ 2017-11-19 23:11 UTC (permalink / raw)
To: Gaute Hope, notmuch
Gaute Hope <eg@gaute.vetsj.com> writes:
> Hi,
>
> when writing this small script [0][1] using the notmuch python bindings I
> had to manually delete the python objects in the right order. Otherwise
> it segfaults when exiting, presumably because memory dependencies /
> cleanup isn't done correctly when the Python GC gets going. Essentially
> I have to delete the objects in the order of their dependency:
Assuming this is python > 3.3, it sounds related to
id:5694CA65.8010400@fastmail.net
See in particular
id:20160112185107.GA21580@odin.tremily.us
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: python bindings memory management
2017-11-19 23:11 ` David Bremner
@ 2017-11-20 10:56 ` Gaute Hope
0 siblings, 0 replies; 3+ messages in thread
From: Gaute Hope @ 2017-11-20 10:56 UTC (permalink / raw)
To: David Bremner, notmuch
David Bremner writes on november 20, 2017 0:11:
> Gaute Hope <eg@gaute.vetsj.com> writes:
>
>> Hi,
>>
>> when writing this small script [0][1] using the notmuch python bindings I
>> had to manually delete the python objects in the right order. Otherwise
>> it segfaults when exiting, presumably because memory dependencies /
>> cleanup isn't done correctly when the Python GC gets going. Essentially
>> I have to delete the objects in the order of their dependency:
>
> Assuming this is python > 3.3, it sounds related to
>
> id:5694CA65.8010400@fastmail.net
>
> See in particular
>
> id:20160112185107.GA21580@odin.tremily.us
Yep, probably the same thing.
- Gaute
^ permalink raw reply [flat|nested] 3+ messages in thread
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2017-11-19 15:42 python bindings memory management Gaute Hope
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