Injected parameter results in omission of block parameter

An InternalFunction declared with the following dispatch:

Puppet::Functions.create_function('test', Puppet::Functions::InternalFunction) do

      dispatch :test do

        scope_param

        param 'Integer', 'x'

        required_block_param

      end

      def test(scope, x, block)

        nil

      end

    end

will always fail with 'wrong number of arguments (2 for 3)' when called. The probable cause is that the block parameter is never added to the weaving array. The resulting array after weaving thus contains the scope and the parameter, not the block.