I can reproduce a LuaHBTeX/luaotfload crash with a very small Tibetan example.
Environment:
Minimal repro, with Tendar_Dutsa.ttf (you'll have to rename the font with a _ instead of the space) next to the .tex file:
\documentclass{article}
\usepackage{fontspec}
\setmainfont{Tendar_Dutsa.ttf}[
Path=./,
Renderer=HarfBuzz,
RawFeature={script=tibt}
]
\begin{document}
ང།
\end{document}This is LuaHBTeX, Version 1.15.0 (TeX Live 2022/Debian)
restricted system commands enabled.
(./testbug.tex
LaTeX2e <2022-11-01> patch level 1
L3 programming layer <2023-01-16>
(/usr/share/texlive/texmf-dist/tex/latex/base/article.cls
Document Class: article 2022/07/02 v1.4n Standard LaTeX document class
(/usr/share/texlive/texmf-dist/tex/latex/base/size10.clo))
(/usr/share/texlive/texmf-dist/tex/latex/fontspec/fontspec.sty
(/usr/share/texlive/texmf-dist/tex/latex/l3packages/xparse/xparse.sty
(/usr/share/texlive/texmf-dist/tex/latex/l3kernel/expl3.sty
(/usr/share/texlive/texmf-dist/tex/latex/l3backend/l3backend-luatex.def)))
(/usr/share/texlive/texmf-dist/tex/latex/fontspec/fontspec-luatex.sty
(/usr/share/texlive/texmf-dist/tex/latex/base/fontenc.sty)
(/usr/share/texlive/texmf-dist/tex/latex/fontspec/fontspec.cfg)))
No file testbug.aux.
(/usr/share/texlive/texmf-dist/tex/latex/base/ts1cmr.fd)
warning (node filter): error: ...exmf-dist/tex/luatex/luaotfload/luaotfload-ha
rf-plug.lua:815: attempt to index a nil value (local 'character')
.
<argument> ...ype:D \tex_hskip:D \c_zero_dim \fi: \tex_par:D
\hook_use:n {para/after}\@...
l.10 \end{document}
I can reproduce a LuaHBTeX/luaotfload crash with a very small Tibetan example.
Environment:
Renderer=HarfBuzzTendar_Dutsa.ttf, available on https://github.com/OpenPecha/tibetan-fonts/tree/main/Unicode%20Font%20Families%20%26%20Typefaces/Tendar%20Font%20FamilyMinimal repro, with
Tendar_Dutsa.ttf(you'll have to rename the font with a_instead of the space) next to the.texfile: