tl24-pretest: emoji-fallback errors

[u-fischer]

The following example works fine for me on texlive 2023 but error in tl24-pretest:

\documentclass{article}
\usepackage{fontspec}

\directlua{luaotfload.add_fallback
   ("emojifallback",
    {
      "NotoColorEmoji:mode=harf;"
    }
   )}

\setmainfont{texgyretermes-regular}[RawFeature={fallback=emojifallback}]


\begin{document}
😄  minikube v1.15.1 on Ubuntu 20.04\\
✨  Automatically selected the docker driver\\
👍  Starting control plane node minikube in cluster minikube\\
🚜  Pulling base image ...
\end{document}

The error message depends on if I use lualatex or lualatex-dev (which then use the luotfload-dev branch):

lualatex:

luaotfload | resolve : sequence of 3 lookups yielded nothing appropriate....texm
f-dist/tex/luatex/luaotfload/luaotfload-fallback.lua:50: attempt to index a nil 
value (local 'f').
<to be read again> 

lualatex.dev

warning  (node filter): error: ...nstall/tex/latex-dev/luaotfload/luaotfload-har
f-plug.lua:715: attempt to index a nil value

.
<argument> ...ype:D \tex_hskip:D \c_zero_dim \fi: \tex_par:D 
                                                  \hook_use:n {para/after}\@...
l.207 \end{document}

(I assume it has to do with the new security settings as the example loads files from /AppData/Local/Temp/s77k.0, segoe works).

[zauguin]

This is probably not fallback specific. AFAICT the PNG support generally has issues since the temporary directory can't be written to.

[u-fischer]

yes it fails also with a simply \setmainfont{NotoColorEmoji}[Renderer=HarfBuzz].

[zauguin]

This should be fixed with the latest commit on dev.

[u-fischer]

Seems to work fine, the picture are now from a local temporary directory.