[luatex] Very recent breakage luatex85.sty and cmap.sty

[Marcel Fabian Krüger]

On Fri, Feb 05, 2021 at 12:18:29PM +0100, Ulrike Fischer wrote:
> But the behaviour imho shouldn't depend on luatex85:
> 
> If you want the cmaps then it should do it also without luatex85,
> and if you don't want them it should exist also with luatex85. 
> 

The reason this currently isn't done is that I considered it rather
unlikely for `cmap` to be used there. Most LuaLaTeX documents
don't use fonts with traditional TeX encodings, so `cmap` would be
useless. The exceptions are mostly documents which need some degree of
pdfTeX compatibility and math fonts. Documents which use legacy TeX text
font probably use luatex85 anyway and if it's only used for mathfonts
then mmap is probably preferred anyway.

Marcel