diff -r 1dca460e7d1e -r f6c00b17387c mercurial/graphmod.py
--- a/mercurial/graphmod.py	Thu Jun 26 13:58:24 2008 -0500
+++ b/mercurial/graphmod.py	Thu Jun 26 14:35:46 2008 -0500
@@ -69,6 +69,6 @@
                     edges.append((col, next.index(p), colors[p]))
 
         # Yield and move on
-        yield (repo.changectx(curr_rev), (idx, color), edges)
+        yield (repo[curr_rev], (idx, color), edges)
         revs = next
         curr_rev -= 1