::addChild error

[joseym]

when trying to parse a template I get the following error:

Catchable fatal error: Argument 1 passed to Everzet\Jade\Node\BlockNode::addChild() must be an instance of Everzet\Jade\Node\Node, null given, called in /vagrant/lithium/libraries/li3_jade/libraries/jade.php/src/Everzet/Jade/Parser.php on line 59 and defined in /vagrant/lithium/libraries/li3_jade/libraries/jade.php/src/Everzet/Jade/Node/BlockNode.php on line 25 

Here is the template contents that I am trying to parse:

h2 The Jade template engine Rocks
p(style='white-space:pre;')
    | Jade makes writing HTML EASY and Beautiful
    | If you don't know about it
    a(href="http://jade-lang.com/") Get on it!