[Yhc] buildbot failure in macosx_x86

The Buildbot has detected a new failure of macosx_x86. Full details are available at: http://www.indiegigs.co.uk:8010/macosx_x86/builds/210 Buildbot URL: http://www.indiegigs.co.uk:8010/ Buildslave for this Build: macosxx86 Build Reason: Build Source Stamp: HEAD Blamelist: Andrew Wilkinson ,Christopher Lane Hinson ,Goetz Isenmann,Malcolm.Wallace@cs.york.ac.uk,Neil Mitchell,Stefan O'Rear ,Tom Shackell ,Unknown,dominic.steinitz@blueyonder.co.uk,golubovsky@gmail.com BUILD FAILED: failed Darcs sincerely, -The Buildbot