#25426: pickling SimpleLazyObject fails just after accessing related object of
wrapped model instance.
-------------------------------------+-------------------------------------
Reporter: iru | Owner: nobody
Type: Bug | Status: new
Component: Core | Version: 1.8
(Serialization) |
Severity: Release blocker | Resolution:
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by iru):
This is how this happens :
0. pickling lazy object starts.
1. lazy object is pickled without DJANGO_VERSION_PICKLE_KEY in wrapping
user object.
2. related object "profile" is pickled. It also has a reference to the
user object. ( profile.user, due to one-to-one relationship)
3. the user object(profile.user) is pickled again with same dict used at
step 1. DJANGO_VERSION_PICKLE_KEY is set.
4. pickling the user object fails due to dictionary changed size during
iteration.
5. pickling lazy object fails.
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Ticket URL: <https://code.djangoproject.com/ticket/25426#comment:4>
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