TemplateAssertionError: no test named 'mapping'

[dustin]

When viewing a log:

2012-05-12 09:57:51-0500 [HTTPChannel,0,172.16.1.18] Unhandled Error
        Traceback (most recent call last):
          File "/home/dustin/code/buildbot/t/buildbot/sand27/lib/python2.7/site-packages/twisted/web/http.py", line 773, in requestReceived
            self.process()
          File "/home/dustin/code/buildbot/t/buildbot/sand27/lib/python2.7/site-packages/twisted/web/server.py", line 132, in process
            self.render(resrc)
          File "/home/dustin/code/buildbot/t/buildbot/sand27/lib/python2.7/site-packages/twisted/web/server.py", line 167, in render
            body = resrc.render(self)
          File "/home/dustin/code/buildbot/t/buildbot/master/buildbot/status/web/base.py", line 326, in render
            d = defer.maybeDeferred(lambda : self.content(request, ctx))
        --- <exception caught here> ---
          File "/home/dustin/code/buildbot/t/buildbot/sand27/lib/python2.7/site-packages/twisted/internet/defer.py", line 134, in maybeDeferred
            result = f(*args, **kw)
          File "/home/dustin/code/buildbot/t/buildbot/master/buildbot/status/web/base.py", line 326, in <lambda>
            d = defer.maybeDeferred(lambda : self.content(request, ctx))
          File "/home/dustin/code/buildbot/t/buildbot/master/buildbot/status/web/build.py", line 259, in content
            template = req.site.buildbot_service.templates.get_template("build.html")
          File "/home/dustin/code/buildbot/t/buildbot/sand27/lib/python2.7/site-packages/jinja2/environment.py", line 716, in get_template
            return self._load_template(name, self.make_globals(globals))
          File "/home/dustin/code/buildbot/t/buildbot/sand27/lib/python2.7/site-packages/jinja2/environment.py", line 690, in _load_template
            template = self.loader.load(self, name, globals)
          File "/home/dustin/code/buildbot/t/buildbot/sand27/lib/python2.7/site-packages/jinja2/loaders.py", line 127, in load
            code = environment.compile(source, name, filename)
          File "/home/dustin/code/buildbot/t/buildbot/sand27/lib/python2.7/site-packages/jinja2/environment.py", line 492, in compile
            self.handle_exception(exc_info, source_hint=source)
          File "/home/dustin/code/buildbot/t/buildbot/master/buildbot/status/web/templates/build.html", line 154, in template
            {% if p.value is not mapping %}
        jinja2.exceptions.TemplateAssertionError: no test named 'mapping'

[dustin]

master/buildbot/status/web/base.py

@@ -514 +514 @@
 
     env.install_null_translations() # needed until we have a proper i18n backend
 
+    env.tests['mapping'] = lambda obj : isinstance(obj, dict)
+
     env.filters.update(dict(
         urlencode = urllib.quote,
         email = emailfilter,