--- a/mercurial/localrepo.py	Thu May 18 23:31:12 2006 -0700
+++ b/mercurial/localrepo.py	Wed May 24 01:01:39 2006 +0200
@@ -872,7 +872,7 @@
         b = []
         for n in nodes:
             t = n
-            while n:
+            while 1:
                 p = self.changelog.parents(n)
                 if p[1] != nullid or p[0] == nullid:
                     b.append((t, n, p[0], p[1]))