diff -r 8982a5397687 -r 5936058f6bad hgext/rebase.py
--- a/hgext/rebase.py	Wed Feb 12 23:44:30 2014 +0100
+++ b/hgext/rebase.py	Sat Feb 15 01:23:12 2014 +0100
@@ -790,7 +790,7 @@
                 repo.ui.debug('source is a child of destination\n')
                 return None
 
-        repo.ui.debug('rebase onto %d starting from %s\n' % (dest, roots))
+        repo.ui.debug('rebase onto %d starting from %s\n' % (dest, root))
         state.update(dict.fromkeys(rebaseset, nullrev))
         # Rebase tries to turn <dest> into a parent of <root> while
         # preserving the number of parents of rebased changesets: