diff -r fafe9ca2a749 -r 5093d2a87ff6 mercurial/pvec.py
--- a/mercurial/pvec.py	Fri Apr 12 17:18:52 2013 -0700
+++ b/mercurial/pvec.py	Fri Apr 12 17:20:09 2013 -0700
@@ -169,7 +169,7 @@
             self._bs = hashorctx
             self._depth, self._vec = _split(base85.b85decode(hashorctx))
         else:
-            self._vec = ctxpvec(ctx)
+            self._vec = ctxpvec(hashorctx)
 
     def __str__(self):
         return self._bs