Trying to run 'hg annotate' on an empty file causes a NullPointerException

     [java] Caused by: java.lang.NullPointerException
     [java] 	at com.cenqua.obfuscate.idb.y.b(InfinityDB_3.0.21:1550)
     [java] 	at com.cenqua.fisheye.rep.impl.CommonRevInfoDAO.getRevId(CommonRevInfoDAO.java:156)
     [java] 	at com.cenqua.fisheye.rep.impl.CommonRevInfoDAO.getRevId(CommonRevInfoDAO.java:148)
     [java] 	at com.cenqua.fisheye.rep.impl.CommonRevInfoDAO.getRevId(CommonRevInfoDAO.java:140)
     [java] 	at com.cenqua.fisheye.cache.BaseRevisionCache.getRevId(BaseRevisionCache.java:866)
     [java] 	at com.atlassian.fisheye.dvcs.DvcsCache.getRevId(DvcsCache.java:86)
     [java] 	at com.atlassian.fisheye.dvcs.DvcsCache.getFileRevision(DvcsCache.java:131)
     [java] 	at com.atlassian.fisheye.hg.HgCache$1.endChunk(HgCache.java:164)
     [java] 	at com.atlassian.fisheye.hg.client.HgBlameParser.processInputEnd(HgBlameParser.java:69)
     [java] 	at com.atlassian.utils.process.LineOutputHandler.process(LineOutputHandler.java:72)
     [java] 	at com.atlassian.utils.process.LineOutputHandler.process(LineOutputHandler.java:33)
     [java] 	at com.atlassian.utils.process.PluggableProcessHandler.processOutput(PluggableProcessHandler.java:127)
     [java] 	at com.cenqua.fisheye.util.NamedProcessHandler.processOutput(NamedProcessHandler.java:31)
     [java] 	at com.atlassian.utils.process.ExternalProcessImpl$3.doTask(ExternalProcessImpl.java:315)