--- a/contrib/shrink-revlog.py	Tue May 14 18:52:52 2013 -0500
+++ b/contrib/shrink-revlog.py	Fri May 10 20:37:41 2013 +0200
@@ -117,7 +117,8 @@
     unlookup = lambda x: int(x, 10)
 
     try:
-        bundler = changegroup.bundle10(lookup)
+        bundler = changegroup.bundle10()
+        bundler.start(lookup)
         group = util.chunkbuffer(r1.group(order, bundler))
         group = changegroup.unbundle10(group, "UN")
         r2.addgroup(group, unlookup, tr)