diff -r 4b92591c69a7 -r c2c4fa9af016 mercurial/patch.py
--- a/mercurial/patch.py	Sat Apr 12 20:51:26 2008 +0200
+++ b/mercurial/patch.py	Sat Apr 12 23:05:51 2008 -0400
@@ -789,7 +789,7 @@
         pathlen = len(path)
         i = 0
         if count == 0:
-            return path.rstrip()
+            return '', path.rstrip()
         while count > 0:
             i = path.find('/', i)
             if i == -1: