[NTG-context] generic font loader + luaotfload: 'nodepool' (a nil value)"

14 Jul 2017

      I have been trying to use the newest generic font loader
(luatex-fonts-merged.lua) in the context minimals with luaotfload
in latex. 

This mostly worked with one exception: luaotfload-letterspace.lua
reference a value that no longer exists:

"...mf-dist/tex/luatex/luaotfload/luaotfload-letterspace.lua:73:
attempt to index local 'nodepool' (a nil value)".

luaotfload does

local nodedirect         = nodes.nuts
local nodepool           = nodedirect.pool
local new_kern           = nodepool.kern

and uses new_kern here

local kern_injector = function (fillup, kern)
  if fillup then
    local g = new_glue(kern)
    local s = getfield(g, "spec")
    setfield(s, "stretch", kern)
    setfield(s, "stretch_order", 1)
    return g
  end
  return new_kern(kern)
end

The error goes away when I add this to the fontloader (from an older
version):

nuts.new=direct.new
-- new UF
   nuts.pool={}
   function nuts.pool.kern(k)
   local n=nuts.new("kern",1)
   setfield(n,"kern",k)
   return n
   end
-- end UF
nuts.getprop=nuts.getattr

But I would prefer to change luaotfload-letterspace.lua to use
whatever should be used to get the correct effect. Can someone tell
me how to do it??

-- 
Ulrike Fischer 
http://www.troubleshooting-tex.de/