buildbot failure in Mercurial on OS X 10.6 hg tests (stable)

[hgbuildbot at kublai.com]

The Buildbot has detected a new failure on builder OS X 10.6 hg tests (stable) while building hg.
Full details are available at:
 http://hgbuildbot.kublai.com/builders/OS%20X%2010.6%20hg%20tests%20%28stable%29/builds/319

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

Buildslave for this Build: sl

Build Reason: scheduler
Build Source Stamp: [branch stable] 8c560ad1cdc40b2a9fd7617200daa9b7120f06a6
Blamelist: Jim Hague <jim.hague at acm.org>

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

sincerely,
 -The Buildbot