On Tue, Feb 18, 2020 at 12:54 PM Marcel Fabian Krüger <t...@2krueger.de> wrote:
> On Tue, Feb 18, 2020 at 01:55:59AM -0500, Daniel Benjamin Miller wrote: > > There is an issue with lualatex which comes about when using a document > such > > as this (based on a discussion here > https://tex.stackexchange.com/questions/525898/combining-french-and-greek-babel-does-not-work-in-dvilualatex/526020?noredirect=1#comment1331448_526020 > ). > > > > Try running lualatex on the following document, and an error will be > > returned. This seems to apply for all fonts whose packages were > generated by > > autoinst (step is just an example). > > > > \documentclass[12pt]{article} > > > > > \usepackage[utf8]{luainputenc}\usepackage[LGR,T1]{fontenc}\input{lgrenc.dfu} > > > > \usepackage{step} \usepackage[greek.ancient,main=french]{babel} > > > > \title{Ça marche?} %\date{} \author{me} > > > > \begin{document} \maketitle un, deux, trois > \foreignlanguage{greek}{ἀγαγεῖν} > > \end{document} > > > > According to Marcel Krüger, this is related to an issue which was > reported > > over a year ago: > > https://mailman.ntg.nl/pipermail/dev-luatex/2018-November/006138.html. > > > > A plain LuaTeX example for this would be > > \directlua{ > callback.register('kerning', node.kerning) > > font.current(font.define { > name = "dummy", > type = "virtual", > characters = { > { > width = 655360, > height = 655360, > depth = 655360, > commands = {}, > }, > right_boundary = { > width = 655360, > height = 655360, > depth = 655360, > }, > }, > }) > } > \char1 > \bye > > The issue appears for fonts with a right boundary char if they appear at > the end of a paragraph and the kerning callback is overwritten. Then the > right boundary is passed as tail to the callback which will then remove > the boundary from the node list. As discussed in the earlier thread, > the callback currently can't pass the new tail to LuaTeX (and LuaTeX > does not recalculate the tail in contrast to the documentation) so > LuaTeX adds the end of paragraph glue etc. after the no longer existing > old tail, leading to the error because the new list does not end with > these required nodes. > ok, thank you. I will see it together with the old thread. -- luigi
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