[Zope-Coders] core dump in Zope 2.7 test suite

[Tim Peters]

[Jeremy]
> ...
> I studied the unicode implementation a bit further, and it looks like
> there's trash in the unicode_freelist.  Since it doesn't fail in
> isolation, I wonder if it's a bad interaction between garbage
> collection and the freelist.

Which version of Python were you using?  unicodeobject.c has a long (and
still currently active!) history of refcount bugs, although mostly they've
been leaks.