Puppet users - May 2014 - future parser changes undef to string inside create_resources (tested on puppet 3.5.1 and puppet 3.6.1)

I've stumbled upon this very annoying bug with the future parser where
it's
replacing undef with empty strings when passed inside a hash to 
create_resources().

test.pp
========define test($var = undef) {
  notice inline_template("<%= @name %> is <% if @var
%>true<% else
%>false<% end %> and of type <%= @var.class %>")
}

$config = {
  "from_create_resources" => {
    var => undef
  }
}

create_resources('test', $config)
========
$ puppet apply ./test.pp
Notice: Scope(Test[from_create_resources]): from_create_resources is false 
and of type NilClass

$ puppet apply --parser future ./test.pp
Notice: Scope(Test[from_create_resources]): from_create_resources is true 
and of type String

Breaks most of my templates since I use <% if @var %> everywhere...

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