[NTG-context] LuaTeX: Weird GC behaviour

5 Dec 2017

      Dear devs,

This was asked on TeX.SX: https://tex.stackexchange.com/questions/404617
The example below runs perfectly fine in the normal Lua interpreter, but crashes in texlua because
the maximum number of open file handles is exceeded.  This seems to be a peculiarity of io.lines in
texlua.  Is there anything special to the implementation of it in LuaTeX?

Cheers, Henri

-- Create the file (once)
local filename = 'luatexfilelimit.txt'
local file = io.open(filename, "w")
file:write("hello world\n")
file:close()

-- Print its contents (many times)
for i = 1, 3000000 do
   print(string.format('Attempt %d', i))
   for line in io.lines(filename) do
      print(line)
   end
end