hgext/shelve.py

--- a/hgext/shelve.py	Mon Feb 10 00:52:16 2014 +0100
+++ b/hgext/shelve.py	Mon Feb 10 00:52:46 2014 +0100
@@ -22,7 +22,7 @@
 """
 
 from mercurial.i18n import _
-from mercurial.node import nullid, bin, hex
+from mercurial.node import nullid, nullrev, bin, hex
 from mercurial import changegroup, cmdutil, scmutil, phases
 from mercurial import error, hg, mdiff, merge, patch, repair, util
 from mercurial import templatefilters
@@ -125,7 +125,7 @@
         """Compute the heads of the public ancestors of a commit.
 
         Much faster than the revset heads(ancestors(ctx) - draft())"""
-        seen = set()
+        seen = set([nullrev])
         visit = util.deque()
         visit.append(ctx)
         while visit: