[luatex] LuaTeX 0.76: problem with pdf_colorstack whatsit

[Patrick Gundlach]

> the attached code creates a whatsit node of subtype pdf_colorstack and
> tries to assign a value to field 'cmd'.  This runs fine with LuaTeX
> 0.70.2 from TL 2012, but gives an error with LuaTeX 0.76.0 from
> TL2013pretest.  How should the code be adapted to run with LuaTeX 0.76?

just a reference:

http://tracker.luatex.org/view.php?id=822


Patrick