--- a/Plugins/VcsPlugins/vcsMercurial/hg.py	Tue Aug 30 18:50:20 2011 +0200
+++ b/Plugins/VcsPlugins/vcsMercurial/hg.py	Tue Aug 30 19:12:24 2011 +0200
@@ -2378,6 +2378,7 @@
         args.append('showconfig')
         args.append('extensions')
         
+        output = ""
         if self.__client is None:
             process = QProcess()
             process.start('hg', args)