[Dev-luatex] Using Harfbuzz with dvilualatex produces invalid font references

16 Jan 2023

      Hello,

I have run into a bug when using HarfBuzz and dvilualatex.

When the following document is compiled with dvilualatex
```
\documentclass{minimal}
\usepackage{fontspec}
\setmainfont[Renderer = OpenType]{OpenSans-Regular.ttf
}
\begin{document}
Hello
\end{document}
```

The produced DVI file cannot be handled by dvipdfmx. Running dvipdfmx produces
the following error:

```
dvipdfmx:fatal: Unable to find TFM file
"[OpenSans-Regular.ttf]:mode=harf;shaper=ot;script=latn;language=dflt;+tlig;".
```
Removing '[Render = OpenType]' and running dvipdfmx on the resulting
dvi file works fine.

-- 
Zameer Manji