ZODB 3.10b6 fails to run tests with Python 2.7 on Fedora 14 Branched

Bug #641481 reported by Robin Lee
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ZODB
Fix Released
Low
Jim Fulton

Bug Description

I run usually commands to try to test ZODB. But it comes with a strange error:

[cheeselee@chade ZODB3-3.10.0b6]$ bin/test
Running .!no tests here! tests:
  Set up .!no tests here! in 0.001 seconds.
  Ran 1 tests with 0 failures and 0 errors in 0.000 seconds.
Running .BlobAdaptedFileStorageBlobTests tests:
  Tear down .!no tests here! in 0.001 seconds.
  Set up .BlobAdaptedFileStorageBlobTests in 0.001 seconds.
python: /builddir/build/BUILD/Python-2.7/Modules/gcmodule.c:326: visit_decref: Assertion `gc->gc.gc_refs != 0' failed.
Aborted

Revision history for this message
Jim Fulton (jim-zope) wrote :

This problem occurs in 3.9 as well and probably in versions back to
2002. It seems to arise from Python's 2.7 (somewhat understandable)
intolerance of ZODB's internal weakref implementation.

I believe this will be fixed by the planned reimplementation of
persistent caches using (subclasses of) standard Python weak refs.

In the mean time, we'll probably declare Python 2.7 to be unsupported.

Changed in zodb:
assignee: nobody → Jim Fulton (jim-zope)
importance: Undecided → Low
status: New → Confirmed
Revision history for this message
Robin Lee (cheeselee) wrote :

Will ZODB 3.10 final support Python 2.7?

Revision history for this message
Jim Fulton (jim-zope) wrote :

Unless there is some breakthrough, no.

Revision history for this message
Robin Lee (cheeselee) wrote :

And then, Zope 2.13 won't support Python 2.7?

Revision history for this message
Hanno Schlichting (hannosch) wrote :

If no current ZODB version can support Python 2.7, then of course no Zope 2 version can support it.

Revision history for this message
Jim Fulton (jim-zope) wrote :

There was a breakthrough! :)

Thanks to some help from Tim Peters, I think I'll be able to fix this.
(And get some kind of performance boost as a bonus.)

Revision history for this message
Jim Fulton (jim-zope) wrote :

A second breakthrough sealed the deal. Thanks Tim!

for 3.10.0B7.

Changed in zodb:
status: Confirmed → Fix Committed
Revision history for this message
Robin Lee (cheeselee) wrote :

All tests of 3.10.0b7 run through now.
Thanks for our developers!

Changed in zodb:
status: Fix Committed → Fix Released
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