buildbot failure in Mercurial on OS X 10.7 hg tests (stable)

[hgbuildbot at kublai.com]

The Buildbot has detected a new failure on builder OS X 10.7 hg tests (stable) while building hg.
Full details are available at:
 http://hgbuildbot.kublai.com/builders/OS%20X%2010.7%20hg%20tests%20%28stable%29/builds/114

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

Buildslave for this Build: lion

Build Reason: scheduler
Build Source Stamp: [branch stable] 63f10a1630173e7b36f986c55d5c5d6267b9e7e4
Blamelist: Paul Boddie <paul at boddie.org.uk>

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

sincerely,
 -The Buildbot