diff -r 5ab28a2e9962 -r 58c32a9c8e7b mercurial/scmutil.py
--- a/mercurial/scmutil.py	Mon Mar 10 01:01:43 2014 +0900
+++ b/mercurial/scmutil.py	Wed Mar 12 10:26:48 2014 +0200
@@ -496,7 +496,7 @@
                 start, end = spec.split(_revrangesep, 1)
                 start = revfix(repo, start, 0)
                 end = revfix(repo, end, len(repo) - 1)
-                if end == nullrev and start <= 0:
+                if end == nullrev and start < 0:
                     start = nullrev
                 rangeiter = repo.changelog.revs(start, end)
                 if not seen and not l: