id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
10552	"Built-in template fails ""lowdly"" with exception"	Evgeniy Ivanov	nobody	"length_is filter causes an exception if it's used with None intead of something that has len() method. According to docs this should never happen (tags and filters fails silently).

{{{
Exception Value:  	

Caught an exception while rendering: object of type 'NoneType' has no len()

Original Traceback (most recent call last):
  File ""/usr/local/lib/python2.5/site-packages/django/template/debug.py"", line 71, in render_node
    result = node.render(context)
  File ""/usr/local/lib/python2.5/site-packages/django/template/defaulttags.py"", line 250, in render
    value = bool_expr.resolve(context, True)
  File ""/usr/local/lib/python2.5/site-packages/django/template/__init__.py"", line 559, in resolve
    new_obj = func(obj, *arg_vals)
  File ""/usr/local/lib/python2.5/site-packages/django/template/defaultfilters.py"", line 523, in length_is
    return len(value) == int(arg)
TypeError: object of type 'NoneType' has no len()

}}}
"		closed	Template system	dev		duplicate			Accepted	0	0	0	0	0	0