buildbot failure in Mercurial on OS X 10.7 hg tests

[hgbuildbot at kublai.com]

The Buildbot has detected a new failure on builder OS X 10.7 hg tests while building hg.
Full details are available at:
 http://hgbuildbot.kublai.com/builders/OS%20X%2010.7%20hg%20tests/builds/397

Buildbot URL: http://hgbuildbot.kublai.com/

Buildslave for this Build: lion

Build Reason: scheduler
Build Source Stamp: [branch default] db3a3a65e0dbcd014a510b93abc2bb5dc0064d1e
Blamelist: Bryan O'Sullivan <bryano at fb.com>

BUILD FAILED: failed run-tests.py (python2.7)

sincerely,
 -The Buildbot