diff -r f9a29dc964a3 -r 235f6490550c mercurial/hgweb/webcommands.py
--- a/mercurial/hgweb/webcommands.py	Fri May 22 14:39:34 2015 -0700
+++ b/mercurial/hgweb/webcommands.py	Sun Apr 26 19:42:47 2015 +0900
@@ -223,7 +223,7 @@
 
         revdef = 'reverse(%s)' % query
         try:
-            tree, pos = revset.parse(revdef)
+            tree = revset.parse(revdef)
         except ParseError:
             # can't parse to a revset tree
             return MODE_KEYWORD, query