I replied on python-checkins, I'll state here as well: the fix is still off
as warnings.formatwarning is still being replaced.
On Jun 24, 2013 6:20 PM, "STINNER Victor" <report@bugs.python.org> wrote:

>
> STINNER Victor added the comment:
>
> This issue is *really* annoying: it makes buildbots almost useless (it is
> no more possible to check if a commit introduces a regression). So until
> the best fix is decided, I applied a temporary fix (based on  changes.diff
> written by  Vinay Sajip):
>
> New changeset 2a9e1eb3719c by Victor Stinner in branch 'default':
> Issue #18081: Workaround "./python -m test_idle test_logging" failure
> http://hg.python.org/cpython/rev/2a9e1eb3719c
>
> I checked that "import warnings; warnings.warn('test')" does still use the
> custom warning hook in IDLE. I don't know how to test all hooks.
>
> ----------
> nosy: +haypo
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <http://bugs.python.org/issue18081>
> _______________________________________
>