buildbot failure in Mercurial on OS X 10.6 hg tests

[hgbuildbot at kublai.com]

The Buildbot has detected a new failure on builder OS X 10.6 hg tests while building hg.
Full details are available at:
 http://hgbuildbot.kublai.com/builders/OS%20X%2010.6%20hg%20tests/builds/584

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

Buildslave for this Build: sl

Build Reason: scheduler
Build Source Stamp: [branch default] ad09fc68ef6f4596e2b36289960bb5fc2f974007
Blamelist: Augie Fackler <raf at durin42.com>,Matt Mackall <mpm at selenic.com>,Siddharth Agarwal <sid0 at fb.com>

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

sincerely,
 -The Buildbot