Traceback (most recent call last):
File "/home/pete/src/osrc/django/django/template/__init__.py" in render_node
  706. result = node.render(context)
File "/home/pete/src/osrc/django/django/template/defaulttags.py" in render
  151. val1 = resolve_variable(self.var1, context)
File "/home/pete/src/osrc/django/django/template/__init__.py" in resolve_variable
  664. return current

  UnboundLocalError at /
  local variable 'current' referenced before assignment