toXML is not a function error

[datsis]

Hash: 0c979a9

Source Code:

function Fib( M : integer returns integer )
  if M < 2 then
    M
  else
    Fib(M - 1) + Fib(M - 2)
  end if
end function

Error:
Uncaught TypeError: this.nodes[i].toXML is not a functionnode.complex.toXML @ ir.nodes.js:64node.complex.toXML @ ir.nodes.js:64toGraphML @ ir.nodes.js:315trn @ example.html:31onclick @ example.html:98

[parsifal-47]

no longer the case,
program is translated to sisal-is:
https://github.com/parsifal-47/sisal-is/blob/master/examples/gd/example4.sis

GraphML generated:
https://travis-ci.org/parsifal-47/sisal-is/jobs/181082468