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/140

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

Buildslave for this Build: lion

Build Reason: scheduler
Build Source Stamp: [branch default] 0a0cf3f26938ff7a084f2dcc9e59152ac6060e1e
Blamelist: Adrian Buehlmann <adrian at cadifra.com>,Bryan O'Sullivan <bryano at fb.com>,David Schleimer <dschleimer at fb.com>,Levi Bard <levi at unity3d.com>,Patrick Mezard <patrick at mezard.eu>

BUILD FAILED: failed pure

sincerely,
 -The Buildbot