Here (Windows) cat test.lua fontloader.open('SourceHanSerif-Regular.otf') texlua test.lua crashes in my luatex 1.0.5.
An example % % test1.tex % \documentclass{article} \usepackage{luatexja} \usepackage{fontspec} \setmainfont{SourceHanSerif-Regular} \begin{document} 漢字のテスト。 \end{document} also crashes, whereas the following worked (see an attached test2.pdf) % % test2.tex % \documentclass{article} \usepackage{fontspec} \setmainfont{SourceHanSerif-Regular} \begin{document} 漢字のテスト。 \end{document} Best, Akira
test2.pdf
Description: Adobe PDF document