diff --git a/mercurial/hgweb/webcommands.py b/mercurial/hgweb/webcommands.py
--- a/mercurial/hgweb/webcommands.py
+++ b/mercurial/hgweb/webcommands.py
@@ -857,8 +857,11 @@ def graph(web, req, tmpl):
     downrev = max(0, rev - revcount)
     changenav = webutil.revnav(web.repo).gen(pos, revcount, count)
 
-    dag = graphmod.dagwalker(web.repo, range(start, end)[::-1])
-    tree = list(graphmod.colored(dag, web.repo))
+    tree = []
+    if start < end:
+        revs = list(web.repo.changelog.revs(end - 1, start))
+        dag = graphmod.dagwalker(web.repo, revs)
+        tree = list(graphmod.colored(dag, web.repo))
 
     def getcolumns(tree):
         cols = 0
diff --git a/tests/test-obsolete.t b/tests/test-obsolete.t
--- a/tests/test-obsolete.t
+++ b/tests/test-obsolete.t
@@ -684,15 +684,15 @@ check changelog view
   $ "$TESTDIR/get-with-headers.py" --headeronly localhost:$HGPORT 'shortlog/'
   200 Script output follows
 
-#check graph view
-#
-#  $ "$TESTDIR/get-with-headers.py" --headeronly localhost:$HGPORT 'graph'
-#  200 Script output follows
+check graph view
+
+  $ "$TESTDIR/get-with-headers.py" --headeronly localhost:$HGPORT 'graph'
+  200 Script output follows
+
 check filelog view
 
   $ "$TESTDIR/get-with-headers.py" --headeronly localhost:$HGPORT 'log/'`hg id --debug --id`/'babar'
   200 Script output follows
-
   $ kill `cat hg.pid`
 
 Checking _enable=False warning if obsolete marker exists