--- a/Plugins/VcsPlugins/vcsMercurial/HgClient.py	Sun Oct 23 17:23:35 2011 +0200
+++ b/Plugins/VcsPlugins/vcsMercurial/HgClient.py	Sun Oct 23 18:03:43 2011 +0200
@@ -239,6 +239,9 @@
             if self.__cancel:
                 return -10
             
+            if self.__server is None:
+                return -1
+            
             if self.__server.bytesAvailable() == 0:
                 QThread.msleep(50)
                 continue