[Yhc] buildbot failure in macosx_x86

The Buildbot has detected a failed build of macosx_x86. Full details are available at: http://www.indiegigs.co.uk:8010/macosx_x86/builds/33 Buildbot URL: http://www.indiegigs.co.uk:8010/ Buildslave for this Build: macosxx86 Build Reason: Build Source Stamp: HEAD Blamelist: Andrew Wilkinson <aw@cs.york.ac.uk>,Christopher Lane Hinson <lane@downstairspeople.org>,Goetz Isenmann,Neil Mitchell,Tom Shackell <shackell@cs.york.ac.uk>,Unknown,golubovsky@gmail.com BUILD FAILED: failed Darcs sincerely, -The Buildbot