diff -r d3bb825ddae3 -r e2c413bde8a5 mercurial/hgweb/request.py
--- a/mercurial/hgweb/request.py	Mon Jul 25 16:24:37 2011 -0500
+++ b/mercurial/hgweb/request.py	Mon Jul 25 15:30:19 2011 -0500
@@ -101,7 +101,7 @@
             self.headers = []
 
     def write(self, thing):
-        if hasattr(thing, "__iter__"):
+        if util.safehasattr(thing, "__iter__"):
             for part in thing:
                 self.write(part)
         else: