Puppet

I’m trying to pass an Array as argument to a function, but it fails. I created a simple module to test it. Code follows:

Functions:

# return true case var is an array, false otherwise.
Puppet::Parser::Functions::newfunction(:is_array, :type => :rvalue) do |vals|
        if vals[0].is_a?(Array)
                "true"
    else
            "false"
    end
end
# simple split
Puppet::Parser::Functions::newfunction(:simple_split, :type => :rvalue) do |vals|
    vals[0].split(/#{vals[1]}/)
end

My class:

class testing {
  $a_string = "foo bar baz quux"
  $should_be_an_array = simple_split($a_string, " ")
  $should_be_true = is_array($should_be_an_array)

  file {
    "/tmp/true_test":
      content => $should_be_true,
      mode => 0666, owner => root, group => root;
  }
}

/tmp/true_test gets correctly set to true when running puppet/puppetmaster 0.24.5 (Debian package 0.24.5-3) and incorrectly set to false when running puppet/puppetmaster 0.24.7 (Debian package 0.24.7-1).